Step 6: Configure the cluster

Specify configuration overrides

The Apigee hybrid installer uses defaults for many settings; however, there are a few settings that do not have defaults. You must provide values for these settings, as explained next.

Before you begin

We recommend you review the following scenarios to determine if you want to configure your cluster for them. These configurations are optional.

If you are planning on installing hybrid in multiple regions, read Multi-region deployment before continuing.
Apigee hybrid provides default passwords for the Cassandra users; however, we recommend that you change the default user passwords. See Configuring TLS for Cassandra for details.
If you want to configure the storage and heap settings for Cassandra, see Configure storage and heap settings.
For production installation scenarios, configure persistent solid state disk (SSD) storage for Cassandra. We do not support using local SSDs for Apigee hybrid. For details, see Add SSD storage for production deployments.

Configure the cluster

By convention, configuration overrides are written in a file named overrides.yaml in your $HYBRID_FILES/overrides directory.

Create a new file named overrides.yaml in your $HYBRID_FILES/overrides directory. For example:
```
vi $HYBRID_FILES/overrides/overrides.yaml
```
The overrides.yaml provides the configuration for your unique Apigee hybrid installation. The overrides file in this step provides a basic configuration for a small-footprint hybrid runtime installation, suitable for your first installation.

In overrides.yaml, add the required property values, shown below. A detailed description of each property is also provided below.

If you are installing Apigee hybrid on GKE and you enabled Workload identity on your node pools in Step 1: Create a cluster, select the GKE - Workload Identity tab to configure your overrides.yaml file to use Workload identity.

For all other installations, select the tab for either non-production, Non-prod or production, Prod environments, depending on your choice in Step 4: Create service accounts and credentials.

For installations in production environments, look at the storage requirements for the Cassandra database in Configure Cassandra for production.

GKE - Workload Identity

Make sure the overrides.yaml file has the following structure and syntax. Values in red, bold italics are property values that you must provide. They are described in the table below.

If you are installing Apigee hybrid on GKE, you have an alternative to authenticate and make requests to Google APIs, Workload Identity. For overviews of Workload Identity, see:

To use Workload Identity with Apigee hybrid on GKE, use this template and then follow the steps in Step 8: Install hybrid runtime to create the Kubernetes service accounts and associate them with the Google service accounts you created in Step 4: Create service accounts and credentials.

gcp:
  region: ANALYTICS_REGION
  projectID: GCP_PROJECT_ID
  workloadIdentityEnabled: true

k8sCluster:
  name: CLUSTER_NAME
  region: CLUSTER_LOCATION # Must be the closest Google Cloud region to your cluster.
org: ORG_NAME

instanceID: "UNIQUE_INSTANCE_IDENTIFIER"

cassandra:
  hostNetwork: false
    # false for all GKE installations.
    # See Multi-region deployment: Prerequisites
  replicaCount: 3
    # Use 1 for demo installations and multiples of 3 for production.
    # See Configure Cassandra for production for guidelines.
  backup:
    enabled: true
    # Set to true for initial installation.
    # This triggers apigeectl to create the apigee-cassandra-backup Kubernetes service account.
    # See Cassandra backup overview for instructions on using cassandra.backup.

virtualhosts:
- name: ENVIRONMENT_GROUP_NAME
  selector:
    app: apigee-ingressgateway
    ingress_name: INGRESS_NAME
  sslCertPath: ./certs/CERT_NAME.pem
  sslKeyPath: ./certs/KEY_NAME.key

ingressGateways:
- name: INGRESS_NAME # maximum 17 characters.
  replicaCountMin: 2
  replicaCountMax: 10
  svcAnnotations:  # optional. If you are on AKS, see Known issue #260772383
    SVC_ANNOTATIONS_KEY: SVC_ANNOTATIONS_VALUE
  svcLoadBalancerIP: SVC_LOAD_BALANCER_IP  # optional

envs:
- name: ENVIRONMENT_NAME

logger:
  enabled: false # Set to false for all GKE installations.

Non-prod

Make sure the overrides.yaml file has the following structure and syntax. Values in red, bold italics are property values that you must provide. They are described in the table below.

There are differences between the different platforms for the Google Cloud project region and Kubernetes cluster region. Choose the platform where you are installing Apigee hybrid.

gcp:
  region: ANALYTICS_REGION
  projectID: GCP_PROJECT_ID

k8sCluster:
  name: CLUSTER_NAME
  region: CLUSTER_LOCATION # Must be the closest Google Cloud region to your cluster.
org: ORG_NAME

instanceID: "UNIQUE_INSTANCE_IDENTIFIER"

cassandra:
  replicaCount: 1
    # Use 1 for non-prod or "demo" installations and multiples of 3 for production.
    # See Configure Cassandra for production for guidelines.
  hostNetwork: false
    # Set to false for single region installations and multi-region installations
    # with connectivity between pods in different clusters, for example GKE installations.
    # Set to true  for multi-region installations with no communication between
    # pods in different clusters, for example GKE On-prem, GKE on AWS, Anthos on bare metal,
    # AKS, EKS, and OpenShift installations.
    # See Multi-region deployment: Prerequisites

virtualhosts:
- name: ENVIRONMENT_GROUP_NAME
  selector:
    app: apigee-ingressgateway
    ingress_name: INGRESS_NAME
  sslCertPath: ./certs/CERT_NAME.pem
  sslKeyPath: ./certs/KEY_NAME.key

ingressGateways:
- name: INGRESS_NAME # maximum 17 characters.
  replicaCountMin: 2
  replicaCountMax: 10
  svcAnnotations:  # optional. If you are on AKS, see Known issue #260772383
    SVC_ANNOTATIONS_KEY: SVC_ANNOTATIONS_VALUE
  svcLoadBalancerIP: SVC_LOAD_BALANCER_IP  # optional

envs:
- name: ENVIRONMENT_NAME
  serviceAccountPaths:
    synchronizer: NON_PROD_SERVICE_ACCOUNT_FILEPATH
      # For example: "./service-accounts/GCP_PROJECT_ID-apigee-non-prod.json"
    udca: NON_PROD_SERVICE_ACCOUNT_FILEPATH
    runtime: NON_PROD_SERVICE_ACCOUNT_FILEPATH


mart:
  serviceAccountPath: NON_PROD_SERVICE_ACCOUNT_FILEPATH

connectAgent:
  serviceAccountPath: NON_PROD_SERVICE_ACCOUNT_FILEPATH

metrics:
  serviceAccountPath: NON_PROD_SERVICE_ACCOUNT_FILEPATH

udca:
  serviceAccountPath: NON_PROD_SERVICE_ACCOUNT_FILEPATH

watcher:
  serviceAccountPath: NON_PROD_SERVICE_ACCOUNT_FILEPATH

logger:
  enabled: false
        # Set to false to disable logger for GKE installations.
        # Set to true for all platforms other than GKE.
        # See apigee-logger in Service accounts and roles used by hybrid components.
  serviceAccountPath: NON_PROD_SERVICE_ACCOUNT_FILEPATH

Prod

Make sure the overrides.yaml file has the following structure and syntax. Values in red, bold italics are property values that you must provide. They are described in the table below.

There are differences between the different platforms for the Google Cloud project region and Kubernetes cluster region. Choose the platform where you are installing Apigee hybrid.

gcp:
  region: ANALYTICS_REGION
  projectID: GCP_PROJECT_ID

k8sCluster:
  name: CLUSTER_NAME
  region: CLUSTER_LOCATION # Must be the closest Google Cloud region to your cluster.
org: ORG_NAME

instanceID: "UNIQUE_INSTANCE_IDENTIFIER"

cassandra:
  hostNetwork: false
    # Set to false for single region installations and multi-region installations
    # with connectivity between pods in different clusters, for example GKE installations.
    # Set to true  for multi-region installations with no communication between
    # pods in different clusters, for example GKE On-prem, GKE on AWS, Anthos on bare metal,
    # AKS, EKS, and OpenShift installations.
    # See Multi-region deployment: Prerequisites
  replicaCount: 3
    # Use multiples of 3 for production.
    # See Configure Cassandra for production for guidelines.
  storage:
    capacity: 500Gi
  resources:
    requests:
      cpu: 7
      memory: 15Gi
  maxHeapSize: 8192M
  heapNewSize: 1200M
    # Minimum storage requirements for a production environment.
    # See Configure Cassandra for production.

virtualhosts:
- name: ENVIRONMENT_GROUP_NAME
  selector:
    app: apigee-ingressgateway
    ingress_name: INGRESS_NAME
  sslCertPath: ./certs/CERT_NAME.pem
  sslKeyPath: ./certs/KEY_NAME.key

ingressGateways:
- name: INGRESS_NAME # maximum 17 characters. See Known issue 243167389.
  replicaCountMin: 2
  replicaCountMax: 10
  svcAnnotations:  # optional. If you are on AKS, see Known issue #260772383
    SVC_ANNOTATIONS_KEY: SVC_ANNOTATIONS_VALUE

envs:
- name: ENVIRONMENT_NAME
  serviceAccountPaths:
    synchronizer: SYNCHRONIZER_SERVICE_ACCOUNT_FILEPATH
      # For example: "./service-accounts/GCP_PROJECT_ID-apigee-synchronizer.json"
    udca: UDCA_SERVICE_ACCOUNT_FILEPATH
      # For example: "./service-accounts/GCP_PROJECT_ID-apigee-udca.json"
    runtime: RUNTIME_SERVICE_ACCOUNT_FILEPATH
      # For example: "./service-accounts/GCP_PROJECT_ID-apigee-runtime.json"

mart:
  serviceAccountPath: MART_SERVICE_ACCOUNT_FILEPATH
        # For example: "./service-accounts/GCP_PROJECT_ID-apigee-mart.json"

connectAgent:
  serviceAccountPath: MART_SERVICE_ACCOUNT_FILEPATH
        # Use the same service account for mart and connectAgent

metrics:
  serviceAccountPath: METRICS_SERVICE_ACCOUNT_FILEPATH
        # For example: "./service-accounts/GCP_PROJECT_ID-apigee-metrics.json"

udca:
  serviceAccountPath: UDCA_SERVICE_ACCOUNT_FILEPATH
        # For example: "./service-accounts/GCP_PROJECT_ID-apigee-udca.json"

watcher:
  serviceAccountPath: WATCHER_SERVICE_ACCOUNT_FILEPATH
        # For example: "./service-accounts/GCP_PROJECT_ID-apigee-watcher.json"

logger:
  enabled: false
        # Set to false to disable logger for GKE installations.
        # Set to true for all platforms other than GKE.
        # See apigee-logger in Service accounts and roles used by hybrid components.
  serviceAccountPath: LOGGER_SERVICE_ACCOUNT_FILEPATH
        # For example: "./service-accounts/GCP_PROJECT_ID-apigee-logger.json"

Example

The following example shows a completed overrides file with example property values added:

gcp:
  region: us-central1
  projectID: hybrid-example

k8sCluster:
  name: apigee-hybrid
  region: us-central1

org: hybrid-example

instanceID: "my_hybrid_example"

cassandra:
  hostNetwork: false
  replicaCount: 3

virtualhosts:
- name: example-env-group
  selector:
    app: apigee-ingressgateway
    ingress_name: my-ingress-1
  sslCertPath: ./certs/keystore.pem
  sslKeyPath: ./certs/keystore.key

ingressGateways:
- name: my-ingress-1
  replicaCountMin: 2
  replicaCountMax: 10

envs:
- name: test
  serviceAccountPaths:
    synchronizer: ./service-accounts/my-hybrid-project-apigee-non-prod.json
      # for production environments, my-hybrid-project-apigee-synchronizer.json
    udca: ./service-accounts/my-hybrid-project-apigee-non-prod.json
      # for production environments, my-hybrid-project-apigee-udca.json
    runtime: ./service-accounts/my-hybrid-project-apigee-non-prod.json
      # for production environments, my-hybrid-project-apigee-runtime.json

mart:
  serviceAccountPath: ./service-accounts/my-hybrid-project-apigee-non-prod.json
    # for production environments, my-hybrid-project-apigee-mart.json

connectAgent:
  serviceAccountPath: ./service-accounts/my-hybrid-project-apigee-non-prod.json
    # for production environments, example-hybrid-apigee-mart.json

metrics:
  serviceAccountPath: ./service-accounts/my-hybrid-project-apigee-non-prod.json
    # for production environments, my-hybrid-project-apigee-metrics.json

udca:
  serviceAccountPath: ./service-accounts/my-hybrid-project-apigee-non-prod.json
    # for production environments, my-hybrid-project-apigee-udca.json

watcher:
  serviceAccountPath: ./service-accounts/my-hybrid-project-apigee-non-prod.json
    # for production environments, my-hybrid-project-apigee-watcher.json

logger:
  enabled: false # Set to "false" for GKE. Set to "true" for all other Kubernetes platforms.
  serviceAccountPath: ./service-accounts/my-hybrid-project-apigee-non-prod.json
    # for production environments, LOGGER_SERVICE_ACCOUNT_NAME.json

When you are finished, save the file.

The following table describes each of the property values that you must provide in the overrides file. For more information, see Configuration property reference.

Variable	Description
`ANALYTICS_REGION`	In GKE, You must set this value to the same region where the cluster is running. In all other platforms, select the closest analytics region to your cluster that has Analytics support (see the table in Part 1, Step 2: Create an organization. This is the value you assigned to the environment variable `ANALYTICS_REGION` previously.
`GCP_PROJECT_ID`	Identifies the Google Cloud project where the `apigee-logger` and the `apigee-metrics` push their data. This is the value assigned to the environment variable `PROJECT_ID`.
`CLUSTER_NAME`	Your Kubernetes cluster name. This is the value assigned to the environment variable `CLUSTER_NAME`.
`CLUSTER_LOCATION`	The region where the cluster is running. This is the region where you created the cluster in Step 1: Create a cluster. This is the value you assigned to the environment variable `CLUSTER_LOCATION` previously. If you are working with zonal clusters, you must specify the region in which your cluster was created. For example, if you created your cluster in the `us-central1-a` zone, specify `us-central1` for the `CLUSTER_LOCATION`.
`ORG_NAME`	The ID of your Apigee hybrid organization. This is the value assigned to the environment variable `ORG_NAME`.
`UNIQUE_INSTANCE_IDENTIFIER`	A unique string to identify this instance. This can be any combination of letters and numbers up to 63 characters in length. Note: You can create multiple organizations in the same cluster, but the `instanceID` must be the same for all orgs in the same Kubernetes cluster. For multi-region installations, each region requires its own cluster (individual clusters do not span regions). You can create multiple organizations in the same cluster, but the `instanceID` must be the same for all orgs in the same Kubernetes cluster.
`ENVIRONMENT_GROUP_NAME`	The name of the environment group your environments are assigned to. This is the group you created in Project and org setup - Step 3: Create an environment group. This is the value assigned to the environment variable `ENV_GROUP`. Note: If you wish to place cluster instances in multiple regions, you must be careful about how you define your environments and virtual hosts. If you have one or more environments attached to an environment group, you must include that same environment group configuration in each cluster instance's overrides file.
`CERT_NAME` `KEY_NAME`	Enter the name of the self-signed TLS key and certificate files that you generated previously in Step 5: Create TLS certificates. These files must be located in the `base_directory/hybrid-files/certs` directory. For example: sslCertPath: ./certs/keystore.pem sslKeyPath: ./certs/keystore.key
`INGRESS_NAME`	The name of the Apigee ingress gateway for your deployment. This can be any name that meets the following requirements: Have a maximum length of 17 characters Contain only lowercase alphanumeric characters, '-' or '.' Start with an alphanumeric character End with an alphanumeric character See `ingressGateways[].name` in the Configuration property reference
`SVC_ANNOTATIONS_KEY`: `SVC_ANNOTATIONS_VALUE`	(Optional). This is a key-value pair that provides annotations for your default ingress service. Annotations are used by your cloud platform to help configure your hybrid installation, for example setting the loadbalancer type to either internal or external. Annotations vary from platform to platform. Refer to your platform documentation for required and suggested annotations. Note: You do not need to set `svcAnnotations` if you are creating your own Kubernetes service for ingress deployment as documented in Expose Apigee ingress gateway. Comment out or delete this section if you are not using it.
`SVC_LOAD_BALANCER_IP`	(Optional). An IP address you have reserved for your load balancer. On platforms that support specifying the load balancer IP address, the load balancer will be created with this IP address. On platforms that do not allow you to specify the load balancer IP, this property is ignored. Note: You do not need to set `LoadBalancerIP` if you are creating your own Kubernetes service for ingress deployment as documented in Expose Apigee ingress gateway. In production installations, it is recommended to create your own Kubernetes service. Comment out or delete this section if you are not using it.
`ENVIRONMENT_NAME`	Use the same name that you used when you created an environment in the UI, as explained in Project and org setup - Step 3: Create an environment group.
*_SERVICE_ACCOUNT_FILEPATH	The path and filename account of the service account JSON files in your `service-accounts/` directory. The names must include the path to the service account file. This can be a full path, or the path relative to your `hybrid-files/` directory. If you include a relative path, you must call `apigeectl`, the command to apply this configuration, from your `hybrid-files/` directory. For non-production environments, the name of the single service account is `GCP_PROJECT_ID-non-prod.json` by default. For production environments, the name of the service account key file that you generated with the `create-service-account` tool in Hybrid runtime setup - Step 4: Create service accounts and credentials. You can see the list of service account files in your `service-accounts/` directory. The default names of the production environment service accounts are: Cassandra: `GCP_PROJECT_ID`-`apigee-cassandra.json` Logger: `GCP_PROJECT_ID`-`apigee-logger.json` MART: `GCP_PROJECT_ID`-`apigee-mart.json` Connect agent: `GCP_PROJECT_ID`-`apigee-mart.json` Metrics: `GCP_PROJECT_ID`-`apigee-metrics.json` Apigee runtime: `GCP_PROJECT_ID`- Synchronizer: `GCP_PROJECT_ID`-`apigee-synchronizer.json` UDCA: `GCP_PROJECT_ID`-`apigee-udca.json` Watcher: `GCP_PROJECT_ID`-`apigee-watcher.json` Note: Both `mart` and `connectAgent` use the `apigee-mart` service account.

Summary

The configuration file tells Kubernetes how to deploy the hybrid components to a cluster. Next, you will enable synchronizer access so the Apigee runtime and management planes will be able to communicate.

1 2 3 4 5 6 (NEXT) Step 7: Enable Synchronizer access 8 9 10