This page shows you how to use Organization Policy Service custom constraints to restrict specific operations on the following Google Cloud resources:
certificatemanager.googleapis.com/Certificate
certificatemanager.googleapis.com/CertificateMap
certificatemanager.googleapis.com/CertificateMapEntry
certificatemanager.googleapis.com/CertificateIssuanceConfig
certificatemanager.googleapis.com/TrustConfig
certificatemanager.googleapis.com/DnsAuthorization
To learn more about Organization Policy, see Custom organization policies.
About organization policies and constraints
The Google Cloud Organization Policy Service gives you centralized, programmatic control over your organization's resources. As the organization policy administrator, you can define an organization policy, which is a set of restrictions called constraints that apply to Google Cloud resources and descendants of those resources in the Google Cloud resource hierarchy. You can enforce organization policies at the organization, folder, or project level.
Organization Policy provides predefined constraints for various Google Cloud services. However, if you want more granular, customizable control over the specific fields that are restricted in your organization policies, you can also create custom constraints and use those custom constraints in an organization policy.
Policy inheritance
By default, organization policies are inherited by the descendants of the resources on which you enforce the policy. For example, if you enforce a policy on a folder, Google Cloud enforces the policy on all projects in the folder. To learn more about this behavior and how to change it, refer to Hierarchy evaluation rules.
Before you begin
- Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.
-
In the Google Cloud console, on the project selector page, select or create a Google Cloud project.
-
Make sure that billing is enabled for your Google Cloud project.
- Install the Google Cloud CLI.
-
To initialize the gcloud CLI, run the following command:
gcloud init
-
In the Google Cloud console, on the project selector page, select or create a Google Cloud project.
-
Make sure that billing is enabled for your Google Cloud project.
- Install the Google Cloud CLI.
-
To initialize the gcloud CLI, run the following command:
gcloud init
- Ensure that you know your organization ID.
Required roles
To get the permissions that you need to manage organization policies,
ask your administrator to grant you the
Organization policy administrator (roles/orgpolicy.policyAdmin
) IAM role on
the organization resource
.
For more information about granting roles, see Manage access to projects, folders, and organizations.
You might also be able to get the required permissions through custom roles or other predefined roles.
Create a custom constraint
A custom constraint is defined in a YAML file by the resources, methods, conditions, and actions that are supported by the service on which you are enforcing the organization policy. Conditions for your custom constraints are defined using Common Expression Language (CEL). For more information about how to build conditions in custom constraints using CEL, see the CEL section of Creating and managing custom constraints.
To create a custom constraint, create a YAML file using the following format:
name: organizations/ORGANIZATION_ID/customConstraints/CONSTRAINT_NAME
resourceTypes:
- RESOURCE_NAME
methodTypes:
- CREATE
- UPDATE
condition: "CONDITION"
actionType: ACTION
displayName: DISPLAY_NAME
description: DESCRIPTION
Replace the following:
ORGANIZATION_ID
: your organization ID, such as123456789
.CONSTRAINT_NAME
: the name you want for your new custom constraint. A custom constraint must start withcustom.
, and can only include uppercase letters, lowercase letters, or numbers, for example,custom.restrictDomain
. The maximum length of this field is 70 characters.RESOURCE_NAME
: the fully qualified name of the Google Cloud resource containing the object and field you want to restrict. For example,certificatemanager.googleapis.com/DnsAuthorization
.CONDITION
: a CEL condition that is written against a representation of a supported service resource. This field has a maximum length of 1000 characters. See Supported resources for more information about the resources available to write conditions against. For example,"resource.domain == 'example.com'"
.ACTION
: the action to take if thecondition
is met. Possible values areALLOW
andDENY
.DISPLAY_NAME
: a human-friendly name for the constraint. This field has a maximum length of 200 characters.DESCRIPTION
: a human-friendly description of the constraint to display as an error message when the policy is violated. This field has a maximum length of 2000 characters.
For more information about how to create a custom constraint, see Defining custom constraints.
Set up a custom constraint
After you have created the YAML file for a new custom constraint, you must set it up to make it available for organization policies in your organization. To set up a custom constraint, use thegcloud org-policies set-custom-constraint
command:
gcloud org-policies set-custom-constraint CONSTRAINT_PATHReplace
CONSTRAINT_PATH
with the full path to your
custom constraint file. For example, /home/user/customconstraint.yaml
.
Once completed, your custom constraints are available as organization policies
in your list of Google Cloud organization policies.
To verify that the custom constraint exists, use the
gcloud org-policies list-custom-constraints
command:
gcloud org-policies list-custom-constraints --organization=ORGANIZATION_IDReplace
ORGANIZATION_ID
with the ID of your organization resource.
For more information, see
Viewing organization policies.
Enforce a custom organization policy
You can enforce a boolean constraint by creating an organization policy that references it, and then applying that organization policy to a Google Cloud resource.Console
- In the Google Cloud console, go to the Organization policies page.
- From the project picker, select the project for which you want to set the organization policy.
- From the list on the Organization policies page, select your constraint to view the Policy details page for that constraint.
- To configure the organization policy for this resource, click Manage policy.
- On the Edit policy page, select Override parent's policy.
- Click Add a rule.
- In the Enforcement section, select whether enforcement of this organization policy is on or off.
- Optional: To make the organization policy conditional on a tag, click Add condition. Note that if you add a conditional rule to an organization policy, you must add at least one unconditional rule or the policy cannot be saved. For more information, see Setting an organization policy with tags.
- If this is a custom constraint, you can click Test changes to simulate the effect of this organization policy. For more information, see Test organization policy changes with Policy Simulator.
- To finish and apply the organization policy, click Set policy. The policy requires up to 15 minutes to take effect.
gcloud
To create an organization policy that enforces a boolean constraint, create a policy YAML file that references the constraint:
name: projects/PROJECT_ID/policies/CONSTRAINT_NAME spec: rules: - enforce: true
Replace the following:
-
PROJECT_ID
: the project on which you want to enforce your constraint. -
CONSTRAINT_NAME
: the name you defined for your custom constraint. For example,custom.restrictDomain
.
To enforce the organization policy containing the constraint, run the following command:
gcloud org-policies set-policy POLICY_PATH
Replace POLICY_PATH
with the full path to your organization policy
YAML file. The policy requires up to 15 minutes to take effect.
Test the custom organization policy
The following example creates a custom constraint and policy that allow all
new DNS authorizations in a specific project to be configured only for the
example.com
domain.
Before you begin, you need to know the following:
- Your organization ID
- A project ID
Create the constraint
Save the following file as
constraint-restrict-domain.yaml
:name: organizations/ORGANIZATION_ID/customConstraints/custom.restrictDomain resourceTypes: - certificatemanager.googleapis.com/DnsAuthorization methodTypes: - CREATE - UPDATE condition: "resource.domain == 'example.com'" actionType: ALLOW displayName: Restrict domain value description: All DNS authorizations must have example.com as a domain.
This defines a constraint where domain in every DNS authorization must have a specified value.
Apply the constraint:
gcloud org-policies set-custom-constraint constraint-restrict-domain.yaml
Verify that the constraint exists:
gcloud org-policies list-custom-constraints --organization=ORGANIZATION_ID
The output is similar to the following:
CUSTOM_CONSTRAINT ACTION_TYPE METHOD_TYPES RESOURCE_TYPES DISPLAY_NAME custom.restrictDomain ALLOW CREATE,UPDATE certificatemanager.googleapis.com/DnsAuthorization Restrict domain value ...
Create the policy
Save the following file as
policy-restrict-domain.yaml
:name: projects/PROJECT_ID/policies/custom.custom.restrictDomain spec: rules: - enforce: true
Replace
PROJECT_ID
with your project ID.Apply the policy:
gcloud org-policies set-policy policy-restrict-domain.yaml
Verify that the policy exists:
gcloud org-policies list --project=PROJECT_ID
The output is similar to the following:
CONSTRAINT LIST_POLICY BOOLEAN_POLICY ETAG custom.restrictDomain - SET COCsm5QGENiXi2E=
After you apply the policy, wait for about two minutes for Google Cloud to start enforcing the policy.
Test the policy
Try creating a DNS authorization for a different domain:
gcloud certificate-manager dns-authorizations create auth \
--domain=not-example.com
The output is similar to the following:
Operation denied by custom org policy on resource 'projects/PROJECT_ID/locations/global/dnsAuthorizations/auth': ["customConstraints/custom.custom.restrictDomain": "All DNS Authorizations must have example.com as a domain."].
Example custom organization policies for common use cases
The following table provides the syntax of some custom constraints for common use cases:
Description | Constraint syntax |
---|---|
Restrict certificate map entries to a single hostname |
name: organizations/ORGANIZATION_ID/customConstraints/custom.restrictHostname resourceTypes: - certificatemanager.googleapis.com/CertificateMapEntry methodTypes: - CREATE - UPDATE condition: "resource.hostname == 'example.com'" actionType: ALLOW displayName: Restrict hostname value description: All certificate map entries must be configured for example.com. |
Restrict DNS authorizations to a single domain |
name: organizations/ORGANIZATION_ID/customConstraints/custom.restrictDomain resourceTypes: - certificatemanager.googleapis.com/DnsAuthorization methodTypes: - CREATE - UPDATE condition: "resource.domain == 'example.com'" actionType: ALLOW displayName: Restrict domain value description: All DNS authorizations must be configured for example.com. |
Disallow EDGE_CACHE certificates |
name: organizations/ORGANIZATION_ID/customConstraints/custom.restrictScope resourceTypes: - certificatemanager.googleapis.com/Certificate methodTypes: - CREATE - UPDATE condition: "resource.scope == 'EDGE_CACHE'" actionType: DENY displayName: Disallow EDGE_CACHE certificates description: Certificates cannot belong to EDGE_CACHE scope. |
Allow issuing only ECDSA_P384 certificates from Certificate Authority Service |
name: organizations/ORGANIZATION_ID/customConstraints/custom.restrictAlgorithm resourceTypes: - certificatemanager.googleapis.com/CertificateIssuanceConfig methodTypes: - CREATE - UPDATE condition: "resource.keyAlgorithm == 'ECDSA_P384'" actionType: ALLOW displayName: Allow only ECDSA_P384 in Certificate Issuance Configs description: Only ECDSA_P384 certificates are allowed from Certificate Authority Service. |
Disallow using certificate allowlist in TrustConfigs |
name: organizations/ORGANIZATION_ID/customConstraints/custom.restrictAllowlistedCertificates resourceTypes: - certificatemanager.googleapis.com/TrustConfig methodTypes: - CREATE - UPDATE condition: "size(resource.allowlistedCertificates) == 0" actionType: ALLOW displayName: Disallow certificate allowlists. description: Certificate allowlists are not allowed in TrustConfigs. |
Certificate Manager supported resources and operations
The following table lists the Certificate Manager resources that you can reference in custom constraints.Resource | Field |
---|---|
certificatemanager.googleapis.com/Certificate |
resource.description
|
resource.managed.dnsAuthorizations
| |
resource.managed.domains
| |
resource.managed.issuanceConfig
| |
resource.name
| |
resource.scope
| |
resource.selfManaged.pemCertificate
| |
certificatemanager.googleapis.com/CertificateIssuanceConfig |
resource.certificateAuthorityConfig.certificateAuthorityServiceConfig.caPool
|
resource.description
| |
resource.keyAlgorithm
| |
resource.lifetime
| |
resource.name
| |
resource.rotationWindowPercentage
| |
certificatemanager.googleapis.com/CertificateMap |
resource.description
|
resource.name
| |
certificatemanager.googleapis.com/CertificateMapEntry |
resource.certificates
|
resource.description
| |
resource.hostname
| |
resource.matcher
| |
resource.name
| |
certificatemanager.googleapis.com/DnsAuthorization |
resource.description
|
resource.domain
| |
resource.name
| |
resource.type
| |
certificatemanager.googleapis.com/TrustConfig |
resource.allowlistedCertificates.pemCertificate
|
resource.description
| |
resource.name
| |
resource.trustStores.intermediateCas.pemCertificate
| |
resource.trustStores.trustAnchors.pemCertificate
|
What's next
- Learn more about Organization Policy Service.
- Learn more about how to create and manage organization policies.
- See the full list of predefined organization policy constraints.