Constraint templates let you define how a constraint works but delegate defining the specifics of the constraint to an individual or group with subject matter expertise. In addition to separating concerns, this also separates the logic of the constraint from its definition.
All constraints contain a match section, which defines the objects a
constraint applies to. For details on how to configure that section, see
Constraint match section.
Not all constraint templates are available for all versions of Policy Controller and templates can change between versions. Use the following links to compare constraints from supported versions:
Links to supported versions of this page
To ensure that you receive full support, we recommend that you use constraint templates from a supported version of Policy Controller.
To help you see how the constraint templates function, each template includes an example constraint and a resource that violates the constraint.
Available constraint templates
| Constraint Template | Description | Referential |
|---|---|---|
| AllowedServicePortName | Requires that service port names have a prefix from a specified list. | No |
| AsmAuthzPolicyDefaultDeny | Enforce the mesh level default deny AuthorizationPolicy. Reference to https://istio.io/latest/docs/ops/best-practices/security/#use-default-deny-patterns. | Yes |
| AsmAuthzPolicyDisallowedPrefix | Requires that principals and namespaces in Istio `AuthorizationPolicy` rules not have a prefix from a specified list. https://istio.io/latest/docs/reference/config/security/authorization-policy/ | No |
| AsmAuthzPolicyEnforceSourcePrincipals | Requires that Istio AuthorizationPolicy "from" field, when defined, has source principles, which must be set to something other than "*". https://istio.io/latest/docs/reference/config/security/authorization-policy/ | No |
| AsmAuthzPolicyNormalization | Enforce the AuthorizationPolicy normalization. Reference to https://istio.io/latest/docs/reference/config/security/normalization/. | No |
| AsmAuthzPolicySafePattern | Enforce the AuthorizationPolicy safe patterns. Reference to https://istio.io/latest/docs/ops/best-practices/security/#safer-authorization-policy-patterns. | No |
| AsmIngressgatewayLabel | Enforce the istio ingressgateway label usage only on ingressgateway pods. | No |
| AsmPeerAuthnMeshStrictMtls | Enforce the mesh level strict mtls PeerAuthentication. Reference to https://istio.io/latest/docs/ops/best-practices/security/#mutual-tls. | Yes |
| AsmPeerAuthnStrictMtls | Enforce all PeerAuthentications cannot overwrite strict mtls. Reference to https://istio.io/latest/docs/ops/best-practices/security/#mutual-tls. | No |
| AsmRequestAuthnProhibitedOutputHeaders | In RequestAuthentication, enforce the `jwtRules.outPayloadToHeader` field to not contain well known HTTP request headers or custom prohibited headers. Reference to https://istio.io/latest/docs/reference/config/security/jwt/#JWTRule. | No |
| AsmSidecarInjection | Enforce the istio proxy sidecar always been injected to workload pods. | No |
| DestinationRuleTLSEnabled | Prohibits disabling TLS for all hosts and host subsets in Istio DestinationRules. | No |
| DisallowedAuthzPrefix | Requires that principals and namespaces in Istio `AuthorizationPolicy` rules not have a prefix from a specified list. https://istio.io/latest/docs/reference/config/security/authorization-policy/ | No |
| GCPStorageLocationConstraintV1 | Restricts the permitted `locations` for StorageBucket Config Connector resources to the list of locations provided in the constraint. Bucket names in the `exemptions` list are exempt. | No |
| GkeSpotVMTerminationGrace | Requires Pods and Pod Templates with `nodeSelector` or `nodeAfffinty` of `gke-spot` to have a `terminationGracePeriodSeconds` of 15s or less. | Yes |
| K8sAllowedRepos | Requires container images to begin with a string from the specified list. | No |
| K8sAvoidUseOfSystemMastersGroup | Disallows the use of 'system:masters' group. Has no effect during audit. | No |
| K8sBlockAllIngress | Disallows the creation of Ingress objects (`Ingress`, `Gateway`, and `Service` types of `NodePort` and `LoadBalancer`). | No |
| K8sBlockCreationWithDefaultServiceAccount | Disallows the creation of resources using a default service account. Has no effect during audit. | No |
| K8sBlockEndpointEditDefaultRole | Many Kubernetes installations by default have a system:aggregate-to-edit ClusterRole which does not properly restrict access to editing Endpoints. This ConstraintTemplate forbids the system:aggregate-to-edit ClusterRole from granting permission to create/patch/update Endpoints. ClusterRole/system:aggregate-to-edit should not allow Endpoint edit permissions due to CVE-2021-25740, Endpoint & EndpointSlice permissions allow cross-Namespace forwarding, https://github.com/kubernetes/kubernetes/issues/103675 | No |
| K8sBlockLoadBalancer | Disallows all Services with type LoadBalancer. https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer | No |
| K8sBlockNodePort | Disallows all Services with type NodePort. https://kubernetes.io/docs/concepts/services-networking/service/#nodeport | No |
| K8sBlockObjectsOfType | Disallows object of forbidden types. | No |
| K8sBlockProcessNamespaceSharing | Prohibits Pod specs with `shareProcessNamespace` set to `true`. This avoids scenarios where all containers in a Pod share a PID namespace and can access each other's filesystem and memory. | No |
| K8sBlockWildcardIngress | Users should not be able to create Ingresses with a blank or wildcard (*) hostname since that would enable them to intercept traffic for other services in the cluster, even if they don't have access to those services. | No |
| K8sContainerEphemeralStorageLimit | Requires containers to have an ephemeral storage limit set and constrains the limit to be within the specified maximum values. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ | No |
| K8sContainerLimits | Requires containers to have memory and CPU limits set and constrains limits to be within the specified maximum values. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ | No |
| K8sContainerRatios | Sets a maximum ratio for container resource limits to requests. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ | No |
| K8sContainerRequests | Requires containers to have memory and CPU requests set and constrains requests to be within the specified maximum values. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ | No |
| K8sCronJobAllowedRepos | Requires container images of CronJobs to begin with a string from the specified list. | No |
| K8sDisallowAnonymous | Disallows associating ClusterRole and Role resources to the system:anonymous user and system:unauthenticated group. | No |
| K8sDisallowInteractiveTTY | Requires that objects have the fields `spec.tty` and `spec.stdin` set to false or unset. | No |
| K8sDisallowedRepos | Disallowed container repositories that begin with a string from the specified list. | No |
| K8sDisallowedRoleBindingSubjects | Prohibits RoleBindings or ClusterRoleBindings with subjects matching any `disallowedSubjects` passed as parameters. | No |
| K8sDisallowedTags | Requires container images to have an image tag different from the ones in the specified list. https://kubernetes.io/docs/concepts/containers/images/#image-names | No |
| K8sEmptyDirHasSizeLimit | Requires that any `emptyDir` volumes specify a `sizeLimit`. Optionally, a `maxSizeLimit` parameter can be supplied in the constraint to specify a maximum allowable size limit. | No |
| K8sEnforceCloudArmorBackendConfig | Enforces Cloud Armor configuration on BackendConfig resources | No |
| K8sEnforceConfigManagement | Requires the presence and operation of Config Management. Constraints using this `ConstraintTemplate` will be audit only regardless of `enforcementAction` value. | Yes |
| K8sExternalIPs | Restricts Service externalIPs to an allowed list of IP addresses. https://kubernetes.io/docs/concepts/services-networking/service/#external-ips | No |
| K8sHorizontalPodAutoscaler | Disallow the following scenarios when deploying `HorizontalPodAutoscalers` 1. Deployment of HorizontalPodAutoscalers with `.spec.minReplicas` or `.spec.maxReplicas` outside the ranges defined in the constraint 2. Deployment of HorizontalPodAutoscalers where the difference between `.spec.minReplicas` and `.spec.maxReplicas` is less than the configured `minimumReplicaSpread` 3. Deployment of HorizontalPodAutoscalers that do not reference a valid `scaleTargetRef` (e.g. Deployment, ReplicationController, ReplicaSet, StatefulSet). | Yes |
| K8sHttpsOnly | Requires Ingress resources to be HTTPS only. Ingress resources must include the `kubernetes.io/ingress.allow-http` annotation, set to `false`. By default a valid TLS {} configuration is required, this can be made optional by setting the `tlsOptional` parameter to `true`. https://kubernetes.io/docs/concepts/services-networking/ingress/#tls | No |
| K8sImageDigests | Requires container images to contain a digest. https://kubernetes.io/docs/concepts/containers/images/ | No |
| K8sLocalStorageRequireSafeToEvict | Requires Pods using local storage (`emptyDir` or `hostPath`) to have the annotation `"cluster-autoscaler.kubernetes.io/safe-to-evict": "true"`. Cluster Autoscaler will not delete Pods without this annotation. | No |
| K8sMemoryRequestEqualsLimit | Promotes Pod stability by requiring that all containers' requested memory exactly equals the memory limit, so that Pods are never in a state where memory usage exceeds the requested amount. Otherwise, Kubernetes can terminate Pods requesting extra memory if memory is needed on the node. | No |
| K8sNoEnvVarSecrets | Prohibits secrets as environment variables in Pod container definitions. Use mounted secret files in data volumes instead: https://kubernetes.io/docs/concepts/configuration/secret/#using-secrets-as-files-from-a-pod | No |
| K8sNoExternalServices | Prohibits the creation of known resources that expose workloads to external IPs. This includes Istio Gateway resources and Kubernetes Ingress resources. Kubernetes services are also disallowed unless they meet the following criteria: Any Service of type `LoadBalancer` in Google Cloud must have a `"networking.gke.io/load-balancer-type": "Internal"` annotation. Any Service of type `LoadBalancer` in AWS must have a `service.beta.kubernetes.io/aws-load-balancer-internal: "true` annotation. Any "external IPs" (external to the cluster) bound to the Service must be a member of a range of internal CIDRs as provided to the constraint. | No |
| K8sPSPAllowPrivilegeEscalationContainer | Controls restricting escalation to root privileges. Corresponds to the `allowPrivilegeEscalation` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#privilege-escalation | No |
| K8sPSPAllowedUsers | Controls the user and group IDs of the container and some volumes. Corresponds to the `runAsUser`, `runAsGroup`, `supplementalGroups`, and `fsGroup` fields in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#users-and-groups | No |
| K8sPSPAppArmor | Configures an allow-list of AppArmor profiles for use by containers. This corresponds to specific annotations applied to a PodSecurityPolicy. For information on AppArmor, see https://kubernetes.io/docs/tutorials/clusters/apparmor/ | No |
| K8sPSPAutomountServiceAccountTokenPod | Controls the ability of any Pod to enable automountServiceAccountToken. | No |
| K8sPSPCapabilities | Controls Linux capabilities on containers. Corresponds to the `allowedCapabilities` and `requiredDropCapabilities` fields in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#capabilities | No |
| K8sPSPFSGroup | Controls allocating an FSGroup that owns the Pod's volumes. Corresponds to the `fsGroup` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#volumes-and-file-systems | No |
| K8sPSPFlexVolumes | Controls the allowlist of FlexVolume drivers. Corresponds to the `allowedFlexVolumes` field in PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#flexvolume-drivers | No |
| K8sPSPForbiddenSysctls | Controls the `sysctl` profile used by containers. Corresponds to the `allowedUnsafeSysctls` and `forbiddenSysctls` fields in a PodSecurityPolicy. When specified, any sysctl not in the `allowedSysctls` parameter is considered to be forbidden. The `forbiddenSysctls` parameter takes precedence over the `allowedSysctls` parameter. For more information, see https://kubernetes.io/docs/tasks/administer-cluster/sysctl-cluster/ | No |
| K8sPSPHostFilesystem | Controls usage of the host filesystem. Corresponds to the `allowedHostPaths` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#volumes-and-file-systems | No |
| K8sPSPHostNamespace | Disallows sharing of host PID and IPC namespaces by pod containers. Corresponds to the `hostPID` and `hostIPC` fields in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#host-namespaces | No |
| K8sPSPHostNetworkingPorts | Controls usage of host network namespace by pod containers. Specific ports must be specified. Corresponds to the `hostNetwork` and `hostPorts` fields in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#host-namespaces | No |
| K8sPSPPrivilegedContainer | Controls the ability of any container to enable privileged mode. Corresponds to the `privileged` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#privileged | No |
| K8sPSPProcMount | Controls the allowed `procMount` types for the container. Corresponds to the `allowedProcMountTypes` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#allowedprocmounttypes | No |
| K8sPSPReadOnlyRootFilesystem | Requires the use of a read-only root file system by pod containers. Corresponds to the `readOnlyRootFilesystem` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#volumes-and-file-systems | No |
| K8sPSPSELinuxV2 | Defines an allow-list of seLinuxOptions configurations for pod containers. Corresponds to a PodSecurityPolicy requiring SELinux configs. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#selinux | No |
| K8sPSPSeccomp | Controls the seccomp profile used by containers. Corresponds to the `seccomp.security.alpha.kubernetes.io/allowedProfileNames` annotation on a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#seccomp | No |
| K8sPSPVolumeTypes | Restricts mountable volume types to those specified by the user. Corresponds to the `volumes` field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#volumes-and-file-systems | No |
| K8sPSPWindowsHostProcess | Restricts running of Windows HostProcess containers / pods. See https://kubernetes.io/docs/tasks/configure-pod-container/create-hostprocess-pod/ for more information. | No |
| K8sPSSRunAsNonRoot | Requires containers run as non-root users. For more information, see https://kubernetes.io/docs/concepts/security/pod-security-standards/ | No |
| K8sPodDisruptionBudget | Disallow the following scenarios when deploying PodDisruptionBudgets or resources that implement the replica subresource (e.g. Deployment, ReplicationController, ReplicaSet, StatefulSet): 1. Deployment of PodDisruptionBudgets with .spec.maxUnavailable == 0 2. Deployment of PodDisruptionBudgets with .spec.minAvailable == .spec.replicas of the resource with replica subresource This will prevent PodDisruptionBudgets from blocking voluntary disruptions such as node draining. https://kubernetes.io/docs/concepts/workloads/pods/disruptions/ | Yes |
| K8sPodResourcesBestPractices | Requires that containers are not best-effort (by setting cpu and memory requests) and following burstable best practices (memory request must exactly equal limit). Optionally, annotation keys can be configured to permit skipping the various validations. | No |
| K8sPodsRequireSecurityContext | Requires all Pods to define securityContext. Requires all containers defined in Pods to have a SecurityContext defined at the Pod or container level. | No |
| K8sProhibitRoleWildcardAccess | Requires that Roles and ClusterRoles not set resource access to a wildcard '"*"' value except for the exempted Roles and ClusterRoles provided as exemptions. Does not restrict wildcard access to subresources, such as '"*/status"'. | No |
| K8sReplicaLimits | Requires that objects with the field `spec.replicas` (Deployments, ReplicaSets, etc.) specify a number of replicas within defined ranges. | No |
| K8sRequireAdmissionController | Requires either Pod Security Admission or an external policy control system | Yes |
| K8sRequireBinAuthZ | Requires the Binary Authorization Validating Admission Webhook. Constraints using this `ConstraintTemplate` will be audit only regardless of `enforcementAction` value. | Yes |
| K8sRequireCosNodeImage | Enforces the use of Container-Optimized OS from Google on Nodes. | No |
| K8sRequireDaemonsets | Requires the list of daemonsets specified to be present. | Yes |
| K8sRequireDefaultDenyEgressPolicy | Requires that every namespace defined in the cluster has a default deny NetworkPolicy for egress. | Yes |
| K8sRequireNamespaceNetworkPolicies | Requires that every namespace defined in the cluster has a NetworkPolicy. | Yes |
| K8sRequireValidRangesForNetworks | Enforces which CIDR blocks are allowed for network ingress and egress. | No |
| K8sRequiredAnnotations | Requires resources to contain specified annotations, with values matching provided regular expressions. | No |
| K8sRequiredLabels | Requires resources to contain specified labels, with values matching provided regular expressions. | No |
| K8sRequiredProbes | Requires Pods to have readiness and/or liveness probes. | No |
| K8sRequiredResources | Requires containers to have defined resources set. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/ | No |
| K8sRestrictAdmissionController | Restrict dynamic admission controllers to permitted ones | No |
| K8sRestrictAutomountServiceAccountTokens | Restricts the use of service accounts tokens. | No |
| K8sRestrictLabels | Disallows resources from containing specified labels unless there is an exception for the specific resource. | No |
| K8sRestrictNamespaces | Restricts resources from using namespaces listed under the restrictedNamespaces parameter. | No |
| K8sRestrictNfsUrls | Disallows resources from containing NFS URLS unless specified. | No |
| K8sRestrictRbacSubjects | Restricts the use of names in RBAC subjects to permitted values. | No |
| K8sRestrictRoleBindings | Restricts the subjects specified in ClusterRoleBindings and RoleBindings to a list of allowed subjects. | No |
| K8sRestrictRoleRules | Restricts rules that can be set on Role and ClusterRole objects. | No |
| K8sStorageClass | Requires storage classes to be specified when used. Only Gatekeeper 3.9+ and non-ephemeral containers are supported. | Yes |
| K8sUniqueIngressHost | Requires all Ingress rule hosts to be unique. Does not handle hostname wildcards: https://kubernetes.io/docs/concepts/services-networking/ingress/ | Yes |
| K8sUniqueServiceSelector | Requires Services to have unique selectors within a namespace. Selectors are considered the same if they have identical keys and values. Selectors may share a key/value pair so long as there is at least one distinct key/value pair between them. https://kubernetes.io/docs/concepts/services-networking/service/#defining-a-service | Yes |
| NoUpdateServiceAccount | Blocks updating the service account on resources that abstract over Pods. This policy is ignored in audit mode. | No |
| PolicyStrictOnly | Requires that `STRICT` Istio mutual TLS is always specified when using [PeerAuthentication](https://istio.io/latest/docs/reference/config/security/peer_authentication/). This constraint also ensures that the deprecated [Policy](https://istio.io/v1.4/docs/reference/config/security/istio.authentication.v1alpha1/#Policy) and MeshPolicy resources enforce `STRICT` mutual TLS. See: https://istio.io/latest/docs/tasks/security/authentication/mtls-migration/#lock-down-mutual-tls-for-the-entire-mesh | No |
| RestrictNetworkExclusions | Controls which inbound ports, outbound ports, and outbound IP ranges can be excluded from Istio network capture. Ports and IP ranges that bypass Istio network capture are not handled by the Istio proxy and are not subject to Istio mTLS authentication, authorization policy, and other Istio features. This constraint can be used to apply restrictions to the use of the following annotations:
See https://istio.io/latest/docs/reference/config/annotations/. When restricting outbound IP ranges, the constraint calculates whether excluded IP ranges match or are a subset of the allowed IP range exclusions. When using this constraint all inbound ports, outbound ports and outbound IP ranges must always be included by either setting the corresponding "include" annotations to `"*"` or leaving them unset. Setting any of the following annotations to anything other than `"*"` is not allowed:
This constraint always allows port 15020 to be excluded because the Istio sidecar
injector always adds it to the |
No |
| SourceNotAllAuthz | Requires that Istio AuthorizationPolicy rules have source principals set to something other than "*". https://istio.io/latest/docs/reference/config/security/authorization-policy/ | No |
| VerifyDeprecatedAPI | Verifies deprecated Kubernetes APIs to ensure all the API versions are up to date. This template does not apply to audit as audit looks at the resources which are already present in the cluster with non-deprecated API versions. | No |
AllowedServicePortName
Allowed Service Port Names v1.0.1
Requires that service port names have a prefix from a specified list.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AllowedServicePortName
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# prefixes <array>: Prefixes of allowed service port names.
prefixes:
- <string>
Examples
port-name-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AllowedServicePortName metadata: name: port-name-constraint spec: enforcementAction: deny match: kinds: - apiGroups: - "" kinds: - Service parameters: prefixes: - http- - http2- - grpc- - mongo- - redis- - tcp-
Allowed
apiVersion: v1 kind: Service metadata: labels: app: helloworld name: port-name-http spec: ports: - name: http-helloport port: 5000 selector: app: helloworld
Disallowed
apiVersion: v1 kind: Service metadata: labels: app: helloworld name: port-name-tcp spec: ports: - name: foo-helloport port: 5000 selector: app: helloworld
apiVersion: v1 kind: Service metadata: labels: app: helloworld name: port-name-bad spec: ports: - name: helloport port: 5000 selector: app: helloworld
AsmAuthzPolicyDefaultDeny
ASM AuthorizationPolicy Default Deny v1.0.4
Enforce the mesh level default deny AuthorizationPolicy. Reference to https://istio.io/latest/docs/ops/best-practices/security/#use-default-deny-patterns.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmAuthzPolicyDefaultDeny
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# rootNamespace <string>: Anthos Service Mesh root namespace, default value
# is "istio-system" if not specified.
rootNamespace: <string>
# strictnessLevel <string>: Level of AuthorizationPolicy strictness.
# Allowed Values: Low, High
strictnessLevel: <string>
Referential Constraint
This constraint is referential. Prior to use, you must enable referential constraints and create a config that tells Policy Controller what kinds of objects to watch.
Your Policy Controller Config will require a syncOnly entry similar to:
spec:
sync:
syncOnly:
- group: "security.istio.io"
version: "v1beta1"
kind: "AuthorizationPolicy"
Examples
asm-authz-policy-default-deny-with-input-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: istio-system strictnessLevel: High
Allowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: istio-system strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: default-deny-no-action namespace: istio-system spec: null
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: istio-system strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: default-deny-with-action namespace: istio-system spec: action: ALLOW
Disallowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: istio-system strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: not-default-deny namespace: istio-system spec: action: DENY rules: - to: - operation: notMethods: - GET - POST
asm-authz-policy-default-deny-no-input-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High
Allowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: default-deny-no-action namespace: istio-system spec: null
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: default-deny-with-action namespace: istio-system spec: action: ALLOW
Disallowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDefaultDeny metadata: name: asm-authz-policy-default-deny-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: not-default-deny namespace: istio-system spec: action: DENY rules: - to: - operation: notMethods: - GET - POST
AsmAuthzPolicyDisallowedPrefix
ASM AuthorizationPolicy Disallowed Prefixes v1.0.2
Requires that principals and namespaces in Istio AuthorizationPolicy rules not have a prefix from a specified list.
https://istio.io/latest/docs/reference/config/security/authorization-policy/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmAuthzPolicyDisallowedPrefix
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# disallowedNamespacePrefixes <array>: Disallowed prefixes for namespaces.
disallowedNamespacePrefixes:
- <string>
# disallowedPrincipalPrefixes <array>: Disallowed prefixes for principals.
disallowedPrincipalPrefixes:
- <string>
Examples
asm-authz-policy-disallowed-prefix-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyDisallowedPrefix metadata: name: asm-authz-policy-disallowed-prefix-constraint spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - AuthorizationPolicy parameters: disallowedNamespacePrefixes: - bad-ns-prefix - worse-ns-prefix disallowedPrincipalPrefixes: - bad-principal-prefix - worse-principal-prefix
Allowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: valid-authz-policy spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/sleep - source: namespaces: - test selector: matchLabels: app: httpbin
Disallowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: bad-source-principal spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/worse-principal-prefix-sleep - source: namespaces: - test selector: matchLabels: app: httpbin
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: bad-source-namespace spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/sleep - source: namespaces: - bad-ns-prefix-test selector: matchLabels: app: httpbin
AsmAuthzPolicyEnforceSourcePrincipals
ASM AuthorizationPolicy Enforcement Principals v1.0.2
Requires that Istio AuthorizationPolicy "from" field, when defined, has source principles, which must be set to something other than "*". https://istio.io/latest/docs/reference/config/security/authorization-policy/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmAuthzPolicyEnforceSourcePrincipals
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
asm-authz-policy-enforce-source-principals-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyEnforceSourcePrincipals metadata: name: asm-authz-policy-enforce-source-principals-constraint spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - AuthorizationPolicy
Allowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: valid-authz-policy spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/sleep - source: namespaces: - test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin
Disallowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: no-source-principals spec: rules: - from: - source: namespaces: - test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: source-principals-wildcard spec: rules: - from: - source: principals: - '*' - source: namespaces: - test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: source-principals-contains-wildcard spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/sleep - '*' - source: namespaces: - test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin
AsmAuthzPolicyNormalization
ASM AuthorizationPolicy Normalization v1.0.2
Enforce the AuthorizationPolicy normalization. Reference to https://istio.io/latest/docs/reference/config/security/normalization/.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmAuthzPolicyNormalization
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
asm-authz-policy-normalization-sample
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicyNormalization metadata: name: asm-authz-policy-normalization-sample spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - AuthorizationPolicy
Allowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: good-authz-policy spec: action: ALLOW rules: - to: - operation: methods: - GET paths: - /test/foo - when: - key: source.ip values: - 10.1.2.3 - 10.2.0.0/16 - key: request.headers[User-Agent] values: - Mozilla/* selector: matchLabels: app: httpbin
Disallowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: bad-method-lowercase spec: action: ALLOW rules: - to: - operation: methods: - get selector: matchLabels: app: httpbin
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: bad-request-header-whitespace spec: action: ALLOW rules: - to: - operation: methods: - GET - when: - key: source.ip values: - 10.1.2.3 - 10.2.0.0/16 - key: request.headers[User-Ag ent] values: - Mozilla/* selector: matchLabels: app: httpbin
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: path-unnormalized spec: action: ALLOW rules: - to: - operation: methods: - GET paths: - /test\/foo - when: - key: source.ip values: - 10.1.2.3 - 10.2.0.0/16 - key: request.headers[User-Agent] values: - Mozilla/* selector: matchLabels: app: httpbin
AsmAuthzPolicySafePattern
ASM AuthorizationPolicy Safe Patterns v1.0.4
Enforce the AuthorizationPolicy safe patterns. Reference to https://istio.io/latest/docs/ops/best-practices/security/#safer-authorization-policy-patterns.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmAuthzPolicySafePattern
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# strictnessLevel <string>: Level of AuthorizationPolicy strictness.
# Allowed Values: Low, High
strictnessLevel: <string>
Examples
asm-authz-policy-safe-pattern-sample
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmAuthzPolicySafePattern metadata: name: asm-authz-policy-safe-pattern-sample spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - AuthorizationPolicy parameters: strictnessLevel: High
Allowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: good-authz-policy-istio-ingress spec: action: ALLOW rules: - to: - operation: hosts: - test.com - test.com:* methods: - GET selector: matchLabels: istio: ingressgateway
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: good-authz-policy-asm-ingress spec: action: ALLOW rules: - to: - operation: hosts: - test.com - test.com:* methods: - GET selector: matchLabels: asm: ingressgateway
Disallowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: hosts-on-noningress spec: action: ALLOW rules: - to: - operation: hosts: - test.com - test.com:* methods: - GET
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: invalid-hosts spec: action: ALLOW rules: - to: - operation: hosts: - test.com methods: - GET selector: matchLabels: istio: ingressgateway
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: allow-negative-match spec: action: ALLOW rules: - to: - operation: hosts: - test.com - test.com:* notMethods: - GET selector: matchLabels: istio: ingressgateway
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: deny-positive-match spec: action: DENY rules: - to: - operation: hosts: - test.com - test.com:* methods: - GET selector: matchLabels: istio: ingressgateway
AsmIngressgatewayLabel
ASM Ingress Gateway Label v1.0.3
Enforce the istio ingressgateway label usage only on ingressgateway pods.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmIngressgatewayLabel
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
asm-ingressgateway-label-sample
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmIngressgatewayLabel metadata: name: asm-ingressgateway-label-sample spec: enforcementAction: dryrun match: kinds: - apiGroups: - "" kinds: - Pod
Allowed
apiVersion: v1 kind: Pod metadata: labels: app: sleep istio: istio name: sleep spec: containers: - image: curlimages/curl name: sleep - image: gcr.io/gke-release/asm/proxyv2:release name: istio-proxy ports: - containerPort: 15090 name: http-envoy-prom protocol: TCP
apiVersion: v1 kind: Pod metadata: labels: app: istio-ingressgateway istio: ingressgateway name: istio-ingressgateway spec: containers: - image: gcr.io/gke-release/asm/proxyv2:release name: istio-proxy ports: - containerPort: 15090 name: http-envoy-prom protocol: TCP
apiVersion: v1 kind: Pod metadata: labels: app: asm-ingressgateway asm: ingressgateway name: asm-ingressgateway spec: containers: - image: gcr.io/gke-release/asm/proxyv2:release name: istio-proxy ports: - containerPort: 15090 name: http-envoy-prom protocol: TCP
Disallowed
apiVersion: v1 kind: Pod metadata: labels: app: sleep istio: ingressgateway name: sleep spec: containers: - image: curlimages/curl name: sleep
apiVersion: v1 kind: Pod metadata: labels: app: sleep asm: ingressgateway name: sleep spec: containers: - image: curlimages/curl name: sleep
apiVersion: v1 kind: Pod metadata: labels: app: sleep istio: ingressgateway name: sleep spec: containers: - image: curlimages/curl name: sleep - image: gcr.io/gke-release/asm/proxyv2:release name: istio-proxy ports: - containerPort: 15090 name: http-envoy-prom protocol: TCP
AsmPeerAuthnMeshStrictMtls
ASM Peer Authentication Mesh Strict mTLS v1.0.4
Enforce the mesh level strict mtls PeerAuthentication. Reference to https://istio.io/latest/docs/ops/best-practices/security/#mutual-tls.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmPeerAuthnMeshStrictMtls
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# rootNamespace <string>: Anthos Service Mesh root namespace, default value
# is "istio-system" if not specified.
rootNamespace: <string>
# strictnessLevel <string>: Level of PeerAuthentication strictness.
# Allowed Values: Low, High
strictnessLevel: <string>
Referential Constraint
This constraint is referential. Prior to use, you must enable referential constraints and create a config that tells Policy Controller what kinds of objects to watch.
Your Policy Controller Config will require a syncOnly entry similar to:
spec:
sync:
syncOnly:
- group: "security.istio.io"
version: "v1beta1"
kind: "PeerAuthentication"
Examples
asm-peer-authn-mesh-strict-mtls-with-input-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnMeshStrictMtls metadata: name: asm-peer-authn-mesh-strict-mtls-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: asm-root strictnessLevel: High
Allowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnMeshStrictMtls metadata: name: asm-peer-authn-mesh-strict-mtls-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: asm-root strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: mesh-strict-mtls namespace: asm-root spec: mtls: mode: STRICT
Disallowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnMeshStrictMtls metadata: name: asm-peer-authn-mesh-strict-mtls-with-input-constraint spec: enforcementAction: dryrun parameters: rootNamespace: asm-root strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: mesh-permissive-mtls namespace: asm-root spec: mtls: mode: PERMISSIVE
asm-peer-authn-mesh-strict-mtls-no-input-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnMeshStrictMtls metadata: name: asm-peer-authn-mesh-strict-mtls-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High
Allowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnMeshStrictMtls metadata: name: asm-peer-authn-mesh-strict-mtls-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: mesh-strict-mtls namespace: istio-system spec: mtls: mode: STRICT
Disallowed
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnMeshStrictMtls metadata: name: asm-peer-authn-mesh-strict-mtls-no-input-constraint spec: enforcementAction: dryrun parameters: strictnessLevel: High --- # Referential Data apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: mesh-permissive-mtls namespace: istio-system spec: mtls: mode: PERMISSIVE
AsmPeerAuthnStrictMtls
ASM Peer Authentication Strict mTLS v1.0.3
Enforce all PeerAuthentications cannot overwrite strict mtls. Reference to https://istio.io/latest/docs/ops/best-practices/security/#mutual-tls.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmPeerAuthnStrictMtls
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# strictnessLevel <string>: Level of PeerAuthentication strictness.
# Allowed Values: Low, High
strictnessLevel: <string>
Examples
asm-peer-authn-strict-mtls-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmPeerAuthnStrictMtls metadata: name: asm-peer-authn-strict-mtls-constraint spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - PeerAuthentication parameters: strictnessLevel: High
Allowed
apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: valid-strict-mtls-pa namespace: foo spec: mtls: mode: UNSET portLevelMtls: "80": mode: UNSET "443": mode: STRICT selector: matchLabels: app: bar
Disallowed
apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: invalid-permissive-mtls-pa namespace: foo spec: mtls: mode: PERMISSIVE portLevelMtls: "80": mode: UNSET "443": mode: STRICT selector: matchLabels: app: bar
apiVersion: security.istio.io/v1beta1 kind: PeerAuthentication metadata: name: invalid-port-disable-mtls-pa namespace: foo spec: mtls: mode: UNSET portLevelMtls: "80": mode: DISABLE "443": mode: STRICT selector: matchLabels: app: bar
AsmRequestAuthnProhibitedOutputHeaders
ASM RequestAuthentication Prohibited Output Headers v1.0.2
In RequestAuthentication, enforce the jwtRules.outPayloadToHeader field to not contain well known HTTP request headers or custom prohibited headers. Reference to https://istio.io/latest/docs/reference/config/security/jwt/#JWTRule.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmRequestAuthnProhibitedOutputHeaders
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# prohibitedHeaders <array>: User predefined prohibited headers.
prohibitedHeaders:
- <string>
Examples
asm-request-authn-prohibited-output-headers-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmRequestAuthnProhibitedOutputHeaders metadata: name: asm-request-authn-prohibited-output-headers-constraint spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - RequestAuthentication parameters: prohibitedHeaders: - Bad-Header - X-Bad-Header
Allowed
apiVersion: security.istio.io/v1beta1 kind: RequestAuthentication metadata: name: valid-request-authn namespace: istio-system spec: jwtRules: - issuer: example.com outputPayloadToHeader: Good-Header selector: matchLabels: app: istio-ingressgateway
Disallowed
apiVersion: security.istio.io/v1beta1 kind: RequestAuthentication metadata: name: deny-predefined-output-header namespace: istio-system spec: jwtRules: - issuer: example.com outputPayloadToHeader: Host selector: matchLabels: app: istio-ingressgateway
apiVersion: security.istio.io/v1beta1 kind: RequestAuthentication metadata: name: deny-predefined-output-header namespace: istio-system spec: jwtRules: - issuer: example.com outputPayloadToHeader: X-Bad-Header selector: matchLabels: app: istio-ingressgateway
AsmSidecarInjection
ASM Sidecar Injection v1.0.2
Enforce the istio proxy sidecar always been injected to workload pods.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: AsmSidecarInjection
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# strictnessLevel <string>: Level of sidecar injection strictness.
# Allowed Values: Low, High
strictnessLevel: <string>
Examples
asm-sidecar-injection-sample
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: AsmSidecarInjection metadata: name: asm-sidecar-injection-sample spec: enforcementAction: dryrun match: kinds: - apiGroups: - "" kinds: - Pod parameters: strictnessLevel: High
Allowed
apiVersion: v1 kind: Pod metadata: annotations: sidecar.istio.io/inject: "true" name: sleep spec: containers: - image: curlimages/curl name: sleep - image: gcr.io/gke-release/asm/proxyv2:release name: istio-proxy ports: - containerPort: 15090 name: http-envoy-prom protocol: TCP
apiVersion: v1 kind: Pod metadata: annotations: "false": "false" name: sleep spec: containers: - image: curlimages/curl name: sleep - image: gcr.io/gke-release/asm/proxyv2:release name: istio-proxy ports: - containerPort: 15090 name: http-envoy-prom protocol: TCP
Disallowed
apiVersion: v1 kind: Pod metadata: annotations: sidecar.istio.io/inject: "false" name: sleep spec: containers: - image: curlimages/curl name: sleep
DestinationRuleTLSEnabled
Destination Rule TLS Enabled v1.0.1
Prohibits disabling TLS for all hosts and host subsets in Istio DestinationRules.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: DestinationRuleTLSEnabled
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
dr-tls-enabled
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: DestinationRuleTLSEnabled metadata: name: dr-tls-enabled spec: enforcementAction: dryrun match: kinds: - apiGroups: - networking.istio.io kinds: - DestinationRule
Disallowed
apiVersion: networking.istio.io/v1alpha3 kind: DestinationRule metadata: name: dr-subset-tls-disable namespace: default spec: host: myservice subsets: - name: v1 trafficPolicy: tls: mode: DISABLE - name: v2 trafficPolicy: tls: mode: SIMPLE
apiVersion: networking.istio.io/v1alpha3 kind: DestinationRule metadata: name: dr-traffic-tls-disable namespace: default spec: host: myservice trafficPolicy: tls: mode: DISABLE
DisallowedAuthzPrefix
Disallow Istio AuthorizationPolicy Prefixes v1.0.2
Requires that principals and namespaces in Istio AuthorizationPolicy rules not have a prefix from a specified list.
https://istio.io/latest/docs/reference/config/security/authorization-policy/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: DisallowedAuthzPrefix
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# disallowedprefixes <array>: Disallowed prefixes of principals and
# namespaces.
disallowedprefixes:
- <string>
Examples
disallowed-authz-prefix-constraint
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: DisallowedAuthzPrefix metadata: name: disallowed-authz-prefix-constraint spec: enforcementAction: dryrun match: kinds: - apiGroups: - security.istio.io kinds: - AuthorizationPolicy parameters: disallowedprefixes: - badprefix - reallybadprefix
Allowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: good namespace: foo spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/sleep - source: namespaces: - test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin version: v1
Disallowed
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: bad-source-principal namespace: foo spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/badprefix-sleep - source: namespaces: - test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin version: v1
apiVersion: security.istio.io/v1beta1 kind: AuthorizationPolicy metadata: name: bad-source-namespace namespace: foo spec: rules: - from: - source: principals: - cluster.local/ns/default/sa/sleep - source: namespaces: - badprefix-test to: - operation: methods: - GET paths: - /info* - operation: methods: - POST paths: - /data when: - key: request.auth.claims[iss] values: - https://accounts.google.com selector: matchLabels: app: httpbin version: v1
GCPStorageLocationConstraintV1
GCP Storage Location Constraint v1.0.3
Restricts the permitted locations for StorageBucket Config Connector resources to the list of locations provided in the constraint. Bucket names in the exemptions list are exempt.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: GCPStorageLocationConstraintV1
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptions <array>: A list of bucket names that are exempt from this
# constraint.
exemptions:
- <string>
# locations <array>: A list of locations that a bucket is permitted to
# have.
locations:
- <string>
Examples
singapore-and-jakarta-only
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: GCPStorageLocationConstraintV1 metadata: name: singapore-and-jakarta-only spec: enforcementAction: deny match: kinds: - apiGroups: - storage.cnrm.cloud.google.com kinds: - StorageBucket parameters: exemptions: - my_project_id_cloudbuild locations: - asia-southeast1 - asia-southeast2
Allowed
apiVersion: storage.cnrm.cloud.google.com/v1beta1 kind: StorageBucket metadata: name: bucket-in-permitted-location spec: location: asia-southeast1
Disallowed
apiVersion: storage.cnrm.cloud.google.com/v1beta1 kind: StorageBucket metadata: name: bucket-in-disallowed-location spec: location: us-central1
apiVersion: storage.cnrm.cloud.google.com/v1beta1 kind: StorageBucket metadata: name: bucket-without-specific-location spec: null
GkeSpotVMTerminationGrace
Restricts terminationGracePeriodSeconds for GKE Spot VMs v1.1.3
Requires Pods and Pod Templates with nodeSelector or nodeAfffinty of gke-spot to have a terminationGracePeriodSeconds of 15s or less.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: GkeSpotVMTerminationGrace
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# includePodOnSpotNodes <boolean>: Require `terminationGracePeriodSeconds`
# of 15s or less for all `Pod` on a `gke-spot` Node.
includePodOnSpotNodes: <boolean>
Referential Constraint
This constraint is referential. Prior to use, you must enable referential constraints and create a config that tells Policy Controller what kinds of objects to watch.
Your Policy Controller Config will require a syncOnly entry similar to:
spec:
sync:
syncOnly:
- group: ""
version: "v1"
kind: "Node"
Examples
spotvm-termination-grace
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: GkeSpotVMTerminationGrace metadata: name: spotvm-termination-grace spec: enforcementAction: dryrun match: kinds: - apiGroups: - "" kinds: - Pod parameters: includePodOnSpotNodes: true
Allowed
apiVersion: v1 kind: Pod metadata: name: example-allowed spec: containers: - image: nginx name: nginx nodeSelector: cloud.google.com/gke-spot: "true" terminationGracePeriodSeconds: 15
apiVersion: v1 kind: Pod metadata: name: example-allowed spec: containers: - image: nginx name: nginx nodeSelector: cloud.google.com/gke-spot: "true" terminationGracePeriodSeconds: 15
apiVersion: v1 kind: Pod metadata: name: example-with-termGrace spec: Nodename: default containers: - image: nginx name: nginx terminationGracePeriodSeconds: 15 --- # Referential Data apiVersion: v1 kind: Node metadata: labels: cloud.google.com/gke-spot: "true" name: default
apiVersion: v1 kind: Pod metadata: name: example-with-termGrace spec: Nodename: default containers: - image: nginx name: nginx terminationGracePeriodSeconds: 15 --- # Referential Data apiVersion: v1 kind: Node metadata: name: default
apiVersion: v1 kind: Pod metadata: name: example-without-termGrace spec: Nodename: default containers: - image: nginx name: nginx --- # Referential Data apiVersion: v1 kind: Node metadata: name: default
Disallowed
apiVersion: v1 kind: Pod metadata: name: example-disallowed spec: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: cloud.google.com/gke-spot operator: In values: - "true" containers: - image: nginx name: nginx terminationGracePeriodSeconds: 30
apiVersion: v1 kind: Pod metadata: name: example-disallowed spec: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: cloud.google.com/gke-spot operator: In values: - "true" containers: - image: nginx name: nginx
apiVersion: v1 kind: Pod metadata: name: example-disallowed spec: containers: - image: nginx name: nginx nodeSelector: cloud.google.com/gke-spot: "true" terminationGracePeriodSeconds: 30
apiVersion: v1 kind: Pod metadata: name: example-disallowed spec: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: cloud.google.com/gke-spot operator: In values: - "true" containers: - image: nginx name: nginx
apiVersion: v1 kind: Pod metadata: name: example-without-termGrace spec: Nodename: default containers: - image: nginx name: nginx --- # Referential Data apiVersion: v1 kind: Node metadata: labels: cloud.google.com/gke-spot: "true" name: default
K8sAllowedRepos
Allowed Repositories v1.0.1
Requires container images to begin with a string from the specified list.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sAllowedRepos
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# repos <array>: The list of prefixes a container image is allowed to have.
repos:
- <string>
Examples
repo-is-openpolicyagent
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sAllowedRepos metadata: name: repo-is-openpolicyagent spec: match: kinds: - apiGroups: - "" kinds: - Pod namespaces: - default parameters: repos: - openpolicyagent/
Allowed
apiVersion: v1 kind: Pod metadata: name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m memory: 30Mi
Disallowed
apiVersion: v1 kind: Pod metadata: name: nginx-disallowed spec: containers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 30Mi
apiVersion: v1 kind: Pod metadata: name: nginx-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m memory: 30Mi initContainers: - image: nginx name: nginxinit resources: limits: cpu: 100m memory: 30Mi
apiVersion: v1 kind: Pod metadata: name: nginx-disallowed spec: containers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 30Mi initContainers: - image: nginx name: nginxinit resources: limits: cpu: 100m memory: 30Mi
apiVersion: v1 kind: Pod metadata: name: nginx-disallowed spec: containers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 30Mi ephemeralContainers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 30Mi initContainers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 30Mi
K8sAvoidUseOfSystemMastersGroup
Disallow the use of 'system:masters' group v1.0.0
Disallows the use of 'system:masters' group. Has no effect during audit.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sAvoidUseOfSystemMastersGroup
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# allowlistedUsernames <array>: allowlistedUsernames is the list of
# usernames that are allowed to use system:masters group.
allowlistedUsernames:
- <string>
Examples
avoid-use-of-system-masters-group
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sAvoidUseOfSystemMastersGroup metadata: name: avoid-use-of-system-masters-group
Allowed
apiVersion: v1 kind: Namespace metadata: name: example-namespace
K8sBlockAllIngress
Block all Ingress v1.0.4
Disallows the creation of Ingress objects (Ingress, Gateway, and Service types of NodePort and LoadBalancer).
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockAllIngress
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# allowList <array>: A list of regular expressions for the Ingress object
# names that are exempt from the constraint.
allowList:
- <string>
Examples
block-all-ingress
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockAllIngress metadata: name: block-all-ingress spec: enforcementAction: dryrun parameters: allowList: - name1 - name2 - name3 - my-*
Allowed
apiVersion: v1 kind: Service metadata: name: my-service spec: ports: - port: 80 protocol: TCP targetPort: 9376 selector: app.kubernetes.io/name: MyApp type: LoadBalancer
apiVersion: v1 kind: Service metadata: name: allowed-clusterip-service-example spec: ports: - port: 80 protocol: TCP targetPort: 9376 selector: app.kubernetes.io/name: MyApp type: ClusterIP
Disallowed
apiVersion: v1 kind: Service metadata: name: disallowed-service-example spec: ports: - port: 80 protocol: TCP targetPort: 9376 selector: app.kubernetes.io/name: MyApp type: LoadBalancer
apiVersion: v1 kind: Service metadata: name: disallowed-service-example spec: ports: - port: 80 protocol: TCP targetPort: 9376 selector: app.kubernetes.io/name: MyApp type: LoadBalancer
apiVersion: gateway.networking.k8s.io/v1 kind: Gateway metadata: name: disallowed-gateway-example spec: gatewayClassName: istio listeners: - allowedRoutes: namespaces: from: All hostname: '*.example.com' name: default port: 80 protocol: HTTP
K8sBlockCreationWithDefaultServiceAccount
Block Creation with Default Service Account v1.0.2
Disallows the creation of resources using a default service account. Has no effect during audit.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockCreationWithDefaultServiceAccount
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
block-creation-with-default-serviceaccount
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockCreationWithDefaultServiceAccount metadata: name: block-creation-with-default-serviceaccount spec: enforcementAction: dryrun
Allowed
apiVersion: v1 kind: Namespace metadata: name: example-namespace
K8sBlockEndpointEditDefaultRole
Block Endpoint Edit Default Role v1.0.0
Many Kubernetes installations by default have a system:aggregate-to-edit ClusterRole which does not properly restrict access to editing Endpoints. This ConstraintTemplate forbids the system:aggregate-to-edit ClusterRole from granting permission to create/patch/update Endpoints. ClusterRole/system:aggregate-to-edit should not allow Endpoint edit permissions due to CVE-2021-25740, Endpoint & EndpointSlice permissions allow cross-Namespace forwarding, https://github.com/kubernetes/kubernetes/issues/103675
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockEndpointEditDefaultRole
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
block-endpoint-edit-default-role
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockEndpointEditDefaultRole metadata: name: block-endpoint-edit-default-role spec: match: kinds: - apiGroups: - rbac.authorization.k8s.io kinds: - ClusterRole
Allowed
apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: annotations: rbac.authorization.kubernetes.io/autoupdate: "true" labels: kubernetes.io/bootstrapping: rbac-defaults rbac.authorization.k8s.io/aggregate-to-edit: "true" name: system:aggregate-to-edit rules: - apiGroups: - "" resources: - pods/attach - pods/exec - pods/portforward - pods/proxy - secrets - services/proxy verbs: - get - list - watch - apiGroups: - "" resources: - serviceaccounts verbs: - impersonate - apiGroups: - "" resources: - pods - pods/attach - pods/exec - pods/portforward - pods/proxy verbs: - create - delete - deletecollection - patch - update - apiGroups: - "" resources: - configmaps - persistentvolumeclaims - replicationcontrollers - replicationcontrollers/scale - secrets - serviceaccounts - services - services/proxy verbs: - create - delete - deletecollection - patch - update - apiGroups: - apps resources: - daemonsets - deployments - deployments/rollback - deployments/scale - replicasets - replicasets/scale - statefulsets - statefulsets/scale verbs: - create - delete - deletecollection - patch - update - apiGroups: - autoscaling resources: - horizontalpodautoscalers verbs: - create - delete - deletecollection - patch - update - apiGroups: - batch resources: - cronjobs - jobs verbs: - create - delete - deletecollection - patch - update - apiGroups: - extensions resources: - daemonsets - deployments - deployments/rollback - deployments/scale - ingresses - networkpolicies - replicasets - replicasets/scale - replicationcontrollers/scale verbs: - create - delete - deletecollection - patch - update - apiGroups: - policy resources: - poddisruptionbudgets verbs: - create - delete - deletecollection - patch - update - apiGroups: - networking.k8s.io resources: - ingresses - networkpolicies verbs: - create - delete - deletecollection - patch - update
Disallowed
apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: annotations: rbac.authorization.kubernetes.io/autoupdate: "true" labels: kubernetes.io/bootstrapping: rbac-defaults rbac.authorization.k8s.io/aggregate-to-edit: "true" name: system:aggregate-to-edit rules: - apiGroups: - "" resources: - pods/attach - pods/exec - pods/portforward - pods/proxy - secrets - services/proxy verbs: - get - list - watch - apiGroups: - "" resources: - serviceaccounts verbs: - impersonate - apiGroups: - "" resources: - pods - pods/attach - pods/exec - pods/portforward - pods/proxy verbs: - create - delete - deletecollection - patch - update - apiGroups: - "" resources: - configmaps - persistentvolumeclaims - replicationcontrollers - replicationcontrollers/scale - secrets - serviceaccounts - services - services/proxy verbs: - create - delete - deletecollection - patch - update - apiGroups: - apps resources: - daemonsets - deployments - deployments/rollback - deployments/scale - endpoints - replicasets - replicasets/scale - statefulsets - statefulsets/scale verbs: - create - delete - deletecollection - patch - update
K8sBlockLoadBalancer
Block Services with type LoadBalancer v1.0.0
Disallows all Services with type LoadBalancer. https://kubernetes.io/docs/concepts/services-networking/service/#loadbalancer
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockLoadBalancer
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
block-load-balancer
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockLoadBalancer metadata: name: block-load-balancer spec: match: kinds: - apiGroups: - "" kinds: - Service
Allowed
apiVersion: v1 kind: Service metadata: name: my-service-allowed spec: ports: - port: 80 targetPort: 80 type: ClusterIP
Disallowed
apiVersion: v1 kind: Service metadata: name: my-service-disallowed spec: ports: - nodePort: 30007 port: 80 targetPort: 80 type: LoadBalancer
K8sBlockNodePort
Block NodePort v1.0.0
Disallows all Services with type NodePort. https://kubernetes.io/docs/concepts/services-networking/service/#nodeport
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockNodePort
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
block-node-port
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockNodePort metadata: name: block-node-port spec: match: kinds: - apiGroups: - "" kinds: - Service
Disallowed
apiVersion: v1 kind: Service metadata: name: my-service-disallowed spec: ports: - nodePort: 30007 port: 80 targetPort: 80 type: NodePort
K8sBlockObjectsOfType
Block Objects of Type v1.0.1
Disallows object of forbidden types.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockObjectsOfType
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
forbiddenTypes:
- <string>
Examples
block-secrets-of-type-basic-auth
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockObjectsOfType metadata: name: block-secrets-of-type-basic-auth spec: match: kinds: - apiGroups: - "" kinds: - Secret parameters: forbiddenTypes: - kubernetes.io/basic-auth
Allowed
apiVersion: v1 data: password: ZHVtbXlwYXNz username: ZHVtbXl1c2Vy kind: Secret metadata: name: credentials namespace: default type: Opaque
Disallowed
apiVersion: v1 data: password: YmFzaWMtcGFzc3dvcmQ= username: YmFzaWMtdXNlcm5hbWU= kind: Secret metadata: name: secret-basic-auth namespace: default type: kubernetes.io/basic-auth
K8sBlockProcessNamespaceSharing
Block Process Namespace Sharing v1.0.1
Prohibits Pod specs with shareProcessNamespace set to true. This avoids scenarios where all containers in a Pod share a PID namespace and can access each other's filesystem and memory.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockProcessNamespaceSharing
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
block-process-namespace-sharing
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockProcessNamespaceSharing metadata: name: block-process-namespace-sharing
Allowed
apiVersion: v1 kind: Pod metadata: name: good-pod namespace: default spec: containers: - image: nginx name: nginx
Disallowed
apiVersion: v1 kind: Pod metadata: name: bad-pod namespace: default spec: containers: - image: nginx name: nginx shareProcessNamespace: true
K8sBlockWildcardIngress
Block Wildcard Ingress v1.0.1
Users should not be able to create Ingresses with a blank or wildcard (*) hostname since that would enable them to intercept traffic for other services in the cluster, even if they don't have access to those services.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sBlockWildcardIngress
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
block-wildcard-ingress
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sBlockWildcardIngress metadata: name: block-wildcard-ingress spec: match: kinds: - apiGroups: - extensions - networking.k8s.io kinds: - Ingress
Allowed
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: non-wildcard-ingress spec: rules: - host: myservice.example.com http: paths: - backend: service: name: example port: number: 80 path: / pathType: Prefix
Disallowed
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: wildcard-ingress spec: rules: - host: "" http: paths: - backend: service: name: example port: number: 80 path: / pathType: Prefix
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: wildcard-ingress spec: rules: - http: paths: - backend: service: name: example port: number: 80 path: / pathType: Prefix
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: wildcard-ingress spec: rules: - host: '*.example.com' http: paths: - backend: service: name: example port: number: 80 path: / pathType: Prefix - host: valid.example.com http: paths: - backend: service: name: example port: number: 80 path: / pathType: Prefix
K8sContainerEphemeralStorageLimit
Container ephemeral storage limit v1.0.2
Requires containers to have an ephemeral storage limit set and constrains the limit to be within the specified maximum values. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sContainerEphemeralStorageLimit
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# ephemeral-storage <string>: The maximum allowed ephemeral storage limit
# on a Pod, exclusive.
ephemeral-storage: <string>
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
Examples
container-ephemeral-storage-limit
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sContainerEphemeralStorageLimit metadata: name: container-ephemeral-storage-limit spec: match: kinds: - apiGroups: - "" kinds: - Pod parameters: ephemeral-storage: 500Mi
Allowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m ephemeral-storage: 100Mi memory: 1Gi
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m ephemeral-storage: 100Mi memory: 1Gi initContainers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: init-opa resources: limits: cpu: 100m ephemeral-storage: 100Mi memory: 1Gi
Disallowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m memory: 2Gi
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m ephemeral-storage: 1Pi memory: 1Gi
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m ephemeral-storage: 100Mi memory: 1Gi initContainers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: init-opa resources: limits: cpu: 100m ephemeral-storage: 1Pi memory: 1Gi
K8sContainerLimits
Container Limits v1.0.1
Requires containers to have memory and CPU limits set and constrains limits to be within the specified maximum values. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sContainerLimits
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# cpu <string>: The maximum allowed cpu limit on a Pod, exclusive.
cpu: <string>
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
# memory <string>: The maximum allowed memory limit on a Pod, exclusive.
memory: <string>
Examples
container-must-have-limits
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sContainerLimits metadata: name: container-must-have-limits spec: match: kinds: - apiGroups: - "" kinds: - Pod parameters: cpu: 200m memory: 1Gi
Allowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m memory: 1Gi
Disallowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 100m memory: 2Gi
K8sContainerRatios
Container Ratios v1.0.1
Sets a maximum ratio for container resource limits to requests. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sContainerRatios
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# cpuRatio <string>: The maximum allowed ratio of `resources.limits.cpu` to
# `resources.requests.cpu` on a container. If not specified, equal to
# `ratio`.
cpuRatio: <string>
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
# ratio <string>: The maximum allowed ratio of `resources.limits` to
# `resources.requests` on a container.
ratio: <string>
Examples
container-must-meet-ratio
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sContainerRatios metadata: name: container-must-meet-ratio spec: match: kinds: - apiGroups: - "" kinds: - Pod parameters: ratio: "2"
Allowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 200m memory: 200Mi requests: cpu: 100m memory: 100Mi
Disallowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: 800m memory: 2Gi requests: cpu: 100m memory: 100Mi
container-must-meet-memory-and-cpu-ratio
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sContainerRatios metadata: name: container-must-meet-memory-and-cpu-ratio spec: match: kinds: - apiGroups: - "" kinds: - Pod parameters: cpuRatio: "10" ratio: "1"
Allowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: "4" memory: 2Gi requests: cpu: "1" memory: 2Gi
Disallowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: limits: cpu: "4" memory: 2Gi requests: cpu: 100m memory: 2Gi
K8sContainerRequests
Container Requests v1.0.1
Requires containers to have memory and CPU requests set and constrains requests to be within the specified maximum values. https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sContainerRequests
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# cpu <string>: The maximum allowed cpu request on a Pod, exclusive.
cpu: <string>
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
# memory <string>: The maximum allowed memory request on a Pod, exclusive.
memory: <string>
Examples
container-must-have-requests
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sContainerRequests metadata: name: container-must-have-requests spec: match: kinds: - apiGroups: - "" kinds: - Pod parameters: cpu: 200m memory: 1Gi
Allowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: requests: cpu: 100m memory: 1Gi
Disallowed
apiVersion: v1 kind: Pod metadata: labels: owner: me.agilebank.demo name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa resources: requests: cpu: 100m memory: 2Gi
K8sCronJobAllowedRepos
CronJob Allowed Repositories v1.0.1
Requires container images of CronJobs to begin with a string from the specified list.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sCronJobAllowedRepos
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# repos <array>: The list of prefixes a container image is allowed to have.
repos:
- <string>
Examples
cronjob-restrict-repos
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sCronJobAllowedRepos metadata: name: cronjob-restrict-repos spec: match: kinds: - apiGroups: - batch kinds: - CronJob parameters: repos: - gke.gcr.io/
Allowed
apiVersion: batch/v1 kind: CronJob metadata: name: hello spec: jobTemplate: spec: template: spec: containers: - image: gke.gcr.io/busybox:1.28 name: hello schedule: '* * * * *'
Disallowed
apiVersion: batch/v1 kind: CronJob metadata: name: hello spec: jobTemplate: spec: template: spec: containers: - image: busybox:1.28 name: hello schedule: '* * * * *'
K8sDisallowAnonymous
Disallow Anonymous Access v1.0.0
Disallows associating ClusterRole and Role resources to the system:anonymous user and system:unauthenticated group.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowAnonymous
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# allowedRoles <array>: The list of ClusterRoles and Roles that may be
# associated with the `system:unauthenticated` group and `system:anonymous`
# user.
allowedRoles:
- <string>
Examples
no-anonymous
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sDisallowAnonymous metadata: name: no-anonymous spec: match: kinds: - apiGroups: - rbac.authorization.k8s.io kinds: - ClusterRoleBinding - apiGroups: - rbac.authorization.k8s.io kinds: - RoleBinding parameters: allowedRoles: - cluster-role-1
Allowed
apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: cluster-role-binding-1 roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-role-1 subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:authenticated - apiGroup: rbac.authorization.k8s.io kind: Group name: system:unauthenticated
Disallowed
apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: cluster-role-binding-2 roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: cluster-role-2 subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:authenticated - apiGroup: rbac.authorization.k8s.io kind: Group name: system:unauthenticated
K8sDisallowInteractiveTTY
Disallow Interactive TTY Containers v1.0.0
Requires that objects have the fields spec.tty and spec.stdin set to false or unset.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowInteractiveTTY
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
Examples
no-interactive-tty-containers
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sDisallowInteractiveTTY metadata: name: no-interactive-tty-containers spec: match: kinds: - apiGroups: - "" kinds: - Pod
Allowed
apiVersion: v1 kind: Pod metadata: labels: app: nginx-interactive-tty name: nginx-interactive-tty-allowed spec: containers: - image: nginx name: nginx stdin: false tty: false
Disallowed
apiVersion: v1 kind: Pod metadata: labels: app: nginx-privilege-escalation name: nginx-privilege-escalation-disallowed spec: containers: - image: nginx name: nginx stdin: true tty: true
K8sDisallowedRepos
Disallowed Repositories v1.0.0
Disallowed container repositories that begin with a string from the specified list.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowedRepos
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# repos <array>: The list of prefixes a container image is not allowed to
# have.
repos:
- <string>
Examples
repo-must-not-be-k8s-gcr-io
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sDisallowedRepos metadata: name: repo-must-not-be-k8s-gcr-io spec: match: kinds: - apiGroups: - "" kinds: - Pod parameters: repos: - k8s.gcr.io/
Allowed
apiVersion: v1 kind: Pod metadata: name: kustomize-allowed spec: containers: - image: registry.k8s.io/kustomize/kustomize:v3.8.9 name: kustomize
Disallowed
apiVersion: v1 kind: Pod metadata: name: kustomize-disallowed spec: containers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomize
apiVersion: v1 kind: Pod metadata: name: kustomize-disallowed spec: containers: - image: registry.k8s.io/kustomize/kustomize:v3.8.9 name: kustomize initContainers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomizeinit
apiVersion: v1 kind: Pod metadata: name: kustomize-disallowed spec: containers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomize initContainers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomizeinit
apiVersion: v1 kind: Pod metadata: name: kustomize-disallowed spec: containers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomize ephemeralContainers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomize initContainers: - image: k8s.gcr.io/kustomize/kustomize:v3.8.9 name: kustomize
K8sDisallowedRoleBindingSubjects
Disallowed Rolebinding Subjects v1.0.1
Prohibits RoleBindings or ClusterRoleBindings with subjects matching any disallowedSubjects passed as parameters.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowedRoleBindingSubjects
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# disallowedSubjects <array>: A list of subjects that cannot appear in a
# RoleBinding.
disallowedSubjects:
- # apiGroup <string>: The Kubernetes API group of the disallowed role
# binding subject. Currently ignored.
apiGroup: <string>
# kind <string>: The kind of the disallowed role binding subject.
kind: <string>
# name <string>: The name of the disallowed role binding subject.
name: <string>
Examples
disallowed-rolebinding-subjects
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sDisallowedRoleBindingSubjects metadata: name: disallowed-rolebinding-subjects spec: parameters: disallowedSubjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:unauthenticated
Allowed
apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: good-clusterrolebinding roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: my-role subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:authenticated
Disallowed
apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: bad-clusterrolebinding roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: my-role subjects: - apiGroup: rbac.authorization.k8s.io kind: Group name: system:unauthenticated
K8sDisallowedTags
Disallow tags v1.0.1
Requires container images to have an image tag different from the ones in the specified list. https://kubernetes.io/docs/concepts/containers/images/#image-names
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sDisallowedTags
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
# tags <array>: Disallowed container image tags.
tags:
- <string>
Examples
container-image-must-not-have-latest-tag
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sDisallowedTags metadata: name: container-image-must-not-have-latest-tag spec: match: kinds: - apiGroups: - "" kinds: - Pod namespaces: - default parameters: exemptImages: - openpolicyagent/opa-exp:latest - openpolicyagent/opa-exp2:latest tags: - latest
Allowed
apiVersion: v1 kind: Pod metadata: name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa
apiVersion: v1 kind: Pod metadata: name: opa-exempt-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa-exp:latest name: opa-exp - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/init:v1 name: opa-init - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa-exp2:latest name: opa-exp2
Disallowed
apiVersion: v1 kind: Pod metadata: name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa name: opa
apiVersion: v1 kind: Pod metadata: name: opa-disallowed-2 spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:latest name: opa
apiVersion: v1 kind: Pod metadata: name: opa-disallowed-ephemeral spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa ephemeralContainers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:latest name: opa
apiVersion: v1 kind: Pod metadata: name: opa-disallowed-3 spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa-exp:latest name: opa - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/init:latest name: opa-init - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa-exp2:latest name: opa-exp2 - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/monitor:latest name: opa-monitor
K8sEmptyDirHasSizeLimit
Empty Directory has Size Limit v1.0.5
Requires that any emptyDir volumes specify a sizeLimit. Optionally, a maxSizeLimit parameter can be supplied in the constraint to specify a maximum allowable size limit.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sEmptyDirHasSizeLimit
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptVolumesRegex <array>: Exempt Volume names as regex match.
exemptVolumesRegex:
- <string>
# maxSizeLimit <string>: When set, the declared size limit for each volume
# must be less than `maxSizeLimit`.
maxSizeLimit: <string>
Examples
empty-dir-has-size-limit
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sEmptyDirHasSizeLimit metadata: name: empty-dir-has-size-limit spec: match: excludedNamespaces: - istio-system - kube-system - gatekeeper-system parameters: exemptVolumesRegex: - ^istio-[a-z]+$ maxSizeLimit: 4Gi
Allowed
apiVersion: v1 kind: Pod metadata: name: good-pod namespace: default spec: containers: - image: nginx name: nginx volumes: - emptyDir: sizeLimit: 2Gi name: good-pod-volume
apiVersion: v1 kind: Pod metadata: name: exempt-pod namespace: default spec: containers: - image: nginx name: nginx volumes: - emptyDir: {} name: istio-envoy
Disallowed
apiVersion: v1 kind: Pod metadata: name: bad-pod namespace: default spec: containers: - image: nginx name: nginx volumes: - emptyDir: {} name: bad-pod-volume
K8sEnforceCloudArmorBackendConfig
Enforce Cloud Armor on BackendConfig Resources v1.0.2
Enforces Cloud Armor configuration on BackendConfig resources
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sEnforceCloudArmorBackendConfig
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
enforce-cloudarmor-backendconfig
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sEnforceCloudArmorBackendConfig metadata: name: enforce-cloudarmor-backendconfig spec: enforcementAction: dryrun
Allowed
apiVersion: cloud.google.com/v1 kind: BackendConfig metadata: name: my-backendconfig namespace: examplenamespace spec: securityPolicy: name: example-security-policy
apiVersion: cloud.google.com/v1 kind: BackendConfig metadata: name: second-backendconfig spec: securityPolicy: name: my-security-policy
Disallowed
apiVersion: cloud.google.com/v1 kind: BackendConfig metadata: name: my-backendconfig namespace: examplenamespace spec: securityPolicy: name: null
apiVersion: cloud.google.com/v1 kind: BackendConfig metadata: name: my-backendconfig namespace: examplenamespace spec: securityPolicy: name: ""
apiVersion: cloud.google.com/v1 kind: BackendConfig metadata: name: my-backendconfig spec: logging: enable: true sampleRate: 0.5
K8sEnforceConfigManagement
Enforce Config Management v1.1.6
Requires the presence and operation of Config Management. Constraints using this ConstraintTemplate will be audit only regardless of enforcementAction value.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sEnforceConfigManagement
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# requireDriftPrevention <boolean>: Require Config Sync drift prevention to
# prevent config drift.
requireDriftPrevention: <boolean>
# requireRootSync <boolean>: Require a Config Sync `RootSync` object for
# cluster config management.
requireRootSync: <boolean>
Referential Constraint
This constraint is referential. Prior to use, you must enable referential constraints and create a config that tells Policy Controller what kinds of objects to watch.
Your Policy Controller Config will require a syncOnly entry similar to:
spec:
sync:
syncOnly:
- group: "configsync.gke.io"
version: "v1beta1"
kind: "RootSync"
Examples
enforce-config-management
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sEnforceConfigManagement metadata: name: enforce-config-management spec: enforcementAction: dryrun match: kinds: - apiGroups: - configmanagement.gke.io kinds: - ConfigManagement
Allowed
apiVersion: configmanagement.gke.io/v1 kind: ConfigManagement metadata: annotations: configmanagement.gke.io/managed-by-hub: "true" configmanagement.gke.io/update-time: "1663586155" name: config-management spec: binauthz: enabled: true clusterName: tec6ea817b5b4bb2-cluster enableMultiRepo: true git: proxy: {} syncRepo: git@test-git-server.config-management-system-test:/git-server/repos/sot.git hierarchyController: {} policyController: auditIntervalSeconds: 60 enabled: true monitoring: backends: - prometheus - cloudmonitoring mutation: {} referentialRulesEnabled: true templateLibraryInstalled: true status: configManagementVersion: v1.12.2-rc.2 healthy: true
Disallowed
apiVersion: configmanagement.gke.io/v1 kind: ConfigManagement metadata: annotations: configmanagement.gke.io/managed-by-hub: "true" configmanagement.gke.io/update-time: "1663586155" name: config-management spec: binauthz: enabled: true clusterName: tec6ea817b5b4bb2-cluster enableMultiRepo: true git: syncRepo: git@test-git-server.config-management-system-test:/git-server/repos/sot.git hierarchyController: {} policyController: auditIntervalSeconds: 60 enabled: true monitoring: backends: - prometheus - cloudmonitoring mutation: {} referentialRulesEnabled: true templateLibraryInstalled: true status: configManagementVersion: v1.12.2-rc.2
K8sExternalIPs
External IPs v1.0.0
Restricts Service externalIPs to an allowed list of IP addresses. https://kubernetes.io/docs/concepts/services-networking/service/#external-ips
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sExternalIPs
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# allowedIPs <array>: An allow-list of external IP addresses.
allowedIPs:
- <string>
Examples
external-ips
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sExternalIPs metadata: name: external-ips spec: match: kinds: - apiGroups: - "" kinds: - Service parameters: allowedIPs: - 203.0.113.0
Allowed
apiVersion: v1 kind: Service metadata: name: allowed-external-ip spec: externalIPs: - 203.0.113.0 ports: - name: http port: 80 protocol: TCP targetPort: 8080 selector: app: MyApp
Disallowed
apiVersion: v1 kind: Service metadata: name: disallowed-external-ip spec: externalIPs: - 1.1.1.1 ports: - name: http port: 80 protocol: TCP targetPort: 8080 selector: app: MyApp
K8sHorizontalPodAutoscaler
Horizontal Pod Autoscaler v1.0.1
Disallow the following scenarios when deploying HorizontalPodAutoscalers 1. Deployment of HorizontalPodAutoscalers with .spec.minReplicas or .spec.maxReplicas outside the ranges defined in the constraint 2. Deployment of HorizontalPodAutoscalers where the difference between .spec.minReplicas and .spec.maxReplicas is less than the configured minimumReplicaSpread 3. Deployment of HorizontalPodAutoscalers that do not reference a valid scaleTargetRef (e.g. Deployment, ReplicationController, ReplicaSet, StatefulSet).
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sHorizontalPodAutoscaler
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# enforceScaleTargetRef <boolean>: If set to true it validates the HPA
# scaleTargetRef exists
enforceScaleTargetRef: <boolean>
# minimumReplicaSpread <integer>: If configured it enforces the minReplicas
# and maxReplicas in an HPA must have a spread of at least this many
# replicas
minimumReplicaSpread: <integer>
# ranges <array>: Allowed ranges for numbers of replicas. Values are
# inclusive.
ranges:
# <list item: object>: A range of allowed replicas. Values are
# inclusive.
- # max_replicas <integer>: The maximum number of replicas allowed,
# inclusive.
max_replicas: <integer>
# min_replicas <integer>: The minimum number of replicas allowed,
# inclusive.
min_replicas: <integer>
Referential Constraint
This constraint is referential. Prior to use, you must enable referential constraints and create a config that tells Policy Controller what kinds of objects to watch.
Your Policy Controller Config will require a syncOnly entry similar to:
spec:
sync:
syncOnly:
- group: "apps"
version: "v1"
kind: "Deployment"
OR
- group: "apps"
version: "v1"
kind: "StatefulSet"
Examples
horizontal-pod-autoscaler
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sHorizontalPodAutoscaler metadata: name: horizontal-pod-autoscaler spec: enforcementAction: deny match: kinds: - apiGroups: - autoscaling kinds: - HorizontalPodAutoscaler parameters: enforceScaleTargetRef: true minimumReplicaSpread: 1 ranges: - max_replicas: 6 min_replicas: 3
Allowed
apiVersion: autoscaling/v2 kind: HorizontalPodAutoscaler metadata: name: nginx-hpa-allowed namespace: default spec: maxReplicas: 6 metrics: - resource: name: cpu target: averageUtilization: 900 type: Utilization type: Resource minReplicas: 3 scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: nginx-deployment --- # Referential Data apiVersion: apps/v1 kind: Deployment metadata: labels: app: nginx name: nginx-deployment namespace: default spec: replicas: 3 selector: matchLabels: app: nginx example: allowed-deployment template: metadata: labels: app: nginx example: allowed-deployment spec: containers: - image: nginx:1.14.2 name: nginx ports: - containerPort: 80
Disallowed
apiVersion: autoscaling/v2 kind: HorizontalPodAutoscaler metadata: name: nginx-hpa-disallowed-replicas namespace: default spec: maxReplicas: 7 metrics: - resource: name: cpu target: averageUtilization: 900 type: Utilization type: Resource minReplicas: 2 scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: nginx-deployment --- # Referential Data apiVersion: apps/v1 kind: Deployment metadata: labels: app: nginx name: nginx-deployment namespace: default spec: replicas: 3 selector: matchLabels: app: nginx example: allowed-deployment template: metadata: labels: app: nginx example: allowed-deployment spec: containers: - image: nginx:1.14.2 name: nginx ports: - containerPort: 80
apiVersion: autoscaling/v2 kind: HorizontalPodAutoscaler metadata: name: nginx-hpa-disallowed-replicaspread namespace: default spec: maxReplicas: 4 metrics: - resource: name: cpu target: averageUtilization: 900 type: Utilization type: Resource minReplicas: 4 scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: nginx-deployment --- # Referential Data apiVersion: apps/v1 kind: Deployment metadata: labels: app: nginx name: nginx-deployment namespace: default spec: replicas: 3 selector: matchLabels: app: nginx example: allowed-deployment template: metadata: labels: app: nginx example: allowed-deployment spec: containers: - image: nginx:1.14.2 name: nginx ports: - containerPort: 80
apiVersion: autoscaling/v2 kind: HorizontalPodAutoscaler metadata: name: nginx-hpa-disallowed-scaletarget namespace: default spec: maxReplicas: 6 metrics: - resource: name: cpu target: averageUtilization: 900 type: Utilization type: Resource minReplicas: 3 scaleTargetRef: apiVersion: apps/v1 kind: Deployment name: nginx-deployment-missing --- # Referential Data apiVersion: apps/v1 kind: Deployment metadata: labels: app: nginx name: nginx-deployment namespace: default spec: replicas: 3 selector: matchLabels: app: nginx example: allowed-deployment template: metadata: labels: app: nginx example: allowed-deployment spec: containers: - image: nginx:1.14.2 name: nginx ports: - containerPort: 80
K8sHttpsOnly
HTTPS Only v1.0.2
Requires Ingress resources to be HTTPS only. Ingress resources must include the kubernetes.io/ingress.allow-http annotation, set to false. By default a valid TLS {} configuration is required, this can be made optional by setting the tlsOptional parameter to true.
https://kubernetes.io/docs/concepts/services-networking/ingress/#tls
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sHttpsOnly
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# tlsOptional <boolean>: When set to `true` the TLS {} is optional,
# defaults to false.
tlsOptional: <boolean>
Examples
ingress-https-only
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sHttpsOnly metadata: name: ingress-https-only spec: match: kinds: - apiGroups: - extensions - networking.k8s.io kinds: - Ingress
Allowed
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: kubernetes.io/ingress.allow-http: "false" name: ingress-demo-allowed spec: rules: - host: example-host.example.com http: paths: - backend: service: name: nginx port: number: 80 path: / pathType: Prefix tls: - {}
Disallowed
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: ingress-demo-disallowed spec: rules: - host: example-host.example.com http: paths: - backend: service: name: nginx port: number: 80 path: / pathType: Prefix
ingress-https-only-tls-optional
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sHttpsOnly metadata: name: ingress-https-only-tls-optional spec: match: kinds: - apiGroups: - extensions - networking.k8s.io kinds: - Ingress parameters: tlsOptional: true
Allowed
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: kubernetes.io/ingress.allow-http: "false" name: ingress-demo-allowed-tls-optional spec: rules: - host: example-host.example.com http: paths: - backend: service: name: nginx port: number: 80 path: / pathType: Prefix
Disallowed
apiVersion: networking.k8s.io/v1 kind: Ingress metadata: name: ingress-demo-disallowed-tls-optional spec: rules: - host: example-host.example.com http: paths: - backend: service: name: nginx port: number: 80 path: / pathType: Prefix
K8sImageDigests
Image Digests v1.0.1
Requires container images to contain a digest. https://kubernetes.io/docs/concepts/containers/images/
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sImageDigests
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <string>
Examples
container-image-must-have-digest
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sImageDigests metadata: name: container-image-must-have-digest spec: match: kinds: - apiGroups: - "" kinds: - Pod namespaces: - default
Allowed
apiVersion: v1 kind: Pod metadata: name: opa-allowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2@sha256:04ff8fce2afd1a3bc26260348e5b290e8d945b1fad4b4c16d22834c2f3a1814a name: opa
Disallowed
apiVersion: v1 kind: Pod metadata: name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa initContainers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opainit
apiVersion: v1 kind: Pod metadata: name: opa-disallowed spec: containers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa ephemeralContainers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opa initContainers: - args: - run - --server - --addr=localhost:8080 image: openpolicyagent/opa:0.9.2 name: opainit
K8sLocalStorageRequireSafeToEvict
Local Storage Requires Safe to Evict v1.0.1
Requires Pods using local storage (emptyDir or hostPath) to have the annotation "cluster-autoscaler.kubernetes.io/safe-to-evict": "true". Cluster Autoscaler will not delete Pods without this annotation.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sLocalStorageRequireSafeToEvict
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
local-storage-require-safe-to-evict
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sLocalStorageRequireSafeToEvict metadata: name: local-storage-require-safe-to-evict spec: match: excludedNamespaces: - kube-system - istio-system - gatekeeper-system
Allowed
apiVersion: v1 kind: Pod metadata: annotations: cluster-autoscaler.kubernetes.io/safe-to-evict: "true" name: good-pod namespace: default spec: containers: - image: redis name: redis volumeMounts: - mountPath: /data/redis name: redis-storage volumes: - emptyDir: {} name: redis-storage
Disallowed
apiVersion: v1 kind: Pod metadata: name: bad-pod namespace: default spec: containers: - image: redis name: redis volumeMounts: - mountPath: /data/redis name: redis-storage volumes: - emptyDir: {} name: redis-storage
K8sMemoryRequestEqualsLimit
Memory Request Equals Limit v1.0.4
Promotes Pod stability by requiring that all containers' requested memory exactly equals the memory limit, so that Pods are never in a state where memory usage exceeds the requested amount. Otherwise, Kubernetes can terminate Pods requesting extra memory if memory is needed on the node.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sMemoryRequestEqualsLimit
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptContainersRegex <array>: Exempt Container names as regex match.
exemptContainersRegex:
- <string>
Examples
container-must-request-limit
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sMemoryRequestEqualsLimit metadata: name: container-must-request-limit spec: match: excludedNamespaces: - kube-system - resource-group-system - asm-system - istio-system - config-management-system - config-management-monitoring parameters: exemptContainersRegex: - ^istio-[a-z]+$
Allowed
apiVersion: v1 kind: Pod metadata: name: good-pod namespace: default spec: containers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 4Gi requests: cpu: 50m memory: 4Gi
apiVersion: v1 kind: Pod metadata: name: exempt-pod namespace: default spec: containers: - image: auto name: istio-proxy resources: limits: cpu: 100m memory: 4Gi requests: cpu: 50m memory: 2Gi
Disallowed
apiVersion: v1 kind: Pod metadata: name: bad-pod namespace: default spec: containers: - image: nginx name: nginx resources: limits: cpu: 100m memory: 4Gi requests: cpu: 50m memory: 2Gi
K8sNoEnvVarSecrets
No Environment Variable Secrets v1.0.1
Prohibits secrets as environment variables in Pod container definitions. Use mounted secret files in data volumes instead: https://kubernetes.io/docs/concepts/configuration/secret/#using-secrets-as-files-from-a-pod
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sNoEnvVarSecrets
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
Examples
no-secrets-as-env-vars-sample
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sNoEnvVarSecrets metadata: name: no-secrets-as-env-vars-sample spec: enforcementAction: dryrun
Allowed
apiVersion: v1 kind: Pod metadata: name: allowed-example spec: containers: - image: redis name: test volumeMounts: - mountPath: /etc/test name: test readOnly: true volumes: - name: test secret: secretName: mysecret
Disallowed
apiVersion: v1 kind: Pod metadata: name: disallowed-example spec: containers: - env: - name: MY_PASSWORD valueFrom: secretKeyRef: key: password name: mysecret image: redis name: test
K8sNoExternalServices
No External Services v1.0.3
Prohibits the creation of known resources that expose workloads to external IPs. This includes Istio Gateway resources and Kubernetes Ingress resources. Kubernetes services are also disallowed unless they meet the following criteria:
Any Service of type LoadBalancer in Google Cloud must have a "networking.gke.io/load-balancer-type": "Internal" annotation.
Any Service of type LoadBalancer in AWS must have a service.beta.kubernetes.io/aws-load-balancer-internal: "true annotation.
Any "external IPs" (external to the cluster) bound to the Service must be a member of a range of internal CIDRs as provided to the constraint.
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sNoExternalServices
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# cloudPlatform <string>: The hosting cloud platform. Only `GCP` and `AWS`
# are supported currently.
cloudPlatform: <string>
# internalCIDRs <array>: A list of CIDRs that are only accessible
# internally, for example: `10.3.27.0/24`. Which IP ranges are
# internal-only is determined by the underlying network infrastructure.
internalCIDRs:
- <string>
Examples
no-external
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sNoExternalServices metadata: name: no-external spec: parameters: internalCIDRs: - 10.0.0.1/32
Allowed
apiVersion: v1 kind: Service metadata: name: good-service namespace: default spec: externalIPs: - 10.0.0.1 ports: - port: 8888 protocol: TCP targetPort: 8888
apiVersion: v1 kind: Service metadata: annotations: networking.gke.io/load-balancer-type: Internal name: allowed-internal-load-balancer namespace: default spec: type: LoadBalancer
Disallowed
apiVersion: v1 kind: Service metadata: name: bad-service namespace: default spec: externalIPs: - 10.0.0.2 ports: - port: 8888 protocol: TCP targetPort: 8888
no-external-aws
Constraint
apiVersion: constraints.gatekeeper.sh/v1beta1 kind: K8sNoExternalServices metadata: name: no-external-aws spec: parameters: cloudPlatform: AWS
Allowed
apiVersion: v1 kind: Service metadata: annotations: service.beta.kubernetes.io/aws-load-balancer-internal: "true" name: good-aws-service namespace: default spec: type: LoadBalancer
Disallowed
apiVersion: v1 kind: Service metadata: annotations: cloud.google.com/load-balancer-type: Internal name: bad-aws-service namespace: default spec: type: LoadBalancer
K8sPSPAllowPrivilegeEscalationContainer
Allow Privilege Escalation in Container v1.0.1
Controls restricting escalation to root privileges. Corresponds to the allowPrivilegeEscalation field in a PodSecurityPolicy. For more information, see https://kubernetes.io/docs/concepts/policy/pod-security-policy/#privilege-escalation
Constraint schema
apiVersion: constraints.gatekeeper.sh/v1beta1
kind: K8sPSPAllowPrivilegeEscalationContainer
metadata:
name: example
spec:
# match <object>: lets you configure which resources are in scope for this
# constraint. For more information, see the Policy Controller Constraint
# match documentation:
# https://cloud.google.com/anthos-config-management/docs/reference/match
match:
[match schema]
parameters:
# exemptImages <array>: Any container that uses an image that matches an
# entry in this list will be excluded from enforcement. Prefix-matching can
# be signified with `*`. For example: `my-image-*`. It is recommended that
# users use the fully-qualified Docker image name (e.g. start with a domain
# name) in order to avoid unexpectedly exempting images from an untrusted
# repository.
exemptImages:
- <