Prepare to setup the Gateway API for Cloud Service Mesh

Preview

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This page describes how to install the required custom resource definitions for the gateway into your cluster.

Limitations

• Having a mix of gateway config-api and istio config-api clusters in the same fleet is not supported.
• Multi-cluster service discovery and load balancing is not supported for gateway config-api clusters.
• If a cluster is onboarded using the existing --management automatic flag then the cluster starts using the istio configuration API and cannot change to gateway API.
• Only FQDNs are supported. Short names are not supported.

Prerequisites

As a starting point, this guide assumes that you have already created a Google Cloud project and installed kubectl.

Before you begin

1. 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.

2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

   Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

   Go to project selector

3. Make sure that billing is enabled for your Google Cloud project.

4. Enable the Kubernetes Engine, GKE Hub, and Cloud Service Mesh APIs.

   Enable the APIs

5. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

   Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

   Go to project selector

6. Make sure that billing is enabled for your Google Cloud project.

7. Enable the Kubernetes Engine, GKE Hub, and Cloud Service Mesh APIs.

   Enable the APIs

4. Generate a kubeconfig entry for your cluster:

gcloud container clusters get-credentials CLUSTER_NAME --location LOCATION --project PROJECT_ID

where:

• CLUSTER_NAME is the name of your cluster
• LOCATION is the location of your cluster
• PROJECT_ID is the project ID of your cluster

Create and register a GKE cluster

1. Create a GKE cluster:

   gcloud container clusters create CLUSTER_NAME \
   --location=LOCATION \
   --enable-ip-alias \
   --scopes=https://www.googleapis.com/auth/cloud-platform \
   --release-channel=regular \
   --project=PROJECT_ID \
   --gateway-api=standard
   

   where:

   • CLUSTER_NAME is the name of your cluster
   • LOCATION is the location of your cluster
   • PROJECT_ID is the project ID of your cluster

2. Enable Workload Identity Federation for GKE:

   gcloud container clusters update CLUSTER_NAME \
   --location LOCATION \
   --workload-pool=PROJECT_ID.svc.id.goog
   

3. Run the GKE Metadata Server on your node:

   gcloud container node-pools update default-pool \
   --cluster=CLUSTER_NAME \
   --location=LOCATION \
   --workload-metadata=GKE_METADATA
   

4. Register your cluster to a fleet:

   gcloud container hub memberships register CLUSTER_NAME \
   --gke-cluster LOCATION/CLUSTER_NAME \
   --project=PROJECT_ID
   

5. Verify that the cluster is registered to the fleet:

   gcloud container hub memberships list --project=PROJECT_ID
   

   The output is similar to:

   NAME            EXTERNAL_ID                             LOCATION
   my-cluster      91980bb9-593c-4b36-9170-96445c9edd39    us-west1
   

Set up permissions

Note that the following commands grant permission to all authenticated users, but you can use Workload Identity Federation for GKE to grant permission to only select accounts.

1. Grant the trafficdirector.client role:

   gcloud projects add-iam-policy-binding PROJECT_ID \
       --member "group:PROJECT_ID.svc.id.goog:/allAuthenticatedUsers/" \
       --role "roles/trafficdirector.client"
   

2. Grant the container.developer role:

   gcloud projects add-iam-policy-binding PROJECT_ID \
   --member "serviceAccount:[e-mail]" \
   --role "roles/container.developer"
   

   where PROJECT_NUMBER is your project number.

3. Grant the compute.networkAdmin role:

   gcloud projects add-iam-policy-binding PROJECT_ID \
   --member "serviceAccount:[e-mail]" \
   --role "roles/compute.networkAdmin"
   

   where PROJECT_NUMBER is your project number.

Enable Cloud Service Mesh

1. Enable the mesh feature:

   gcloud container hub mesh enable --project PROJECT_ID
   

2. Update the mesh to use the Gateway API:

   gcloud alpha container fleet mesh update \
   --config-api gateway \
   --memberships CLUSTER_NAME \
   --project PROJECT_ID
   

3. Verify the update by describing the status of Cloud Service Mesh resource:

   gcloud alpha container fleet mesh describe
   

Install custom resource definitions

Install the GRPCRoute custom resource definition (CRD):

curl https://raw.githubusercontent.com/kubernetes-sigs/gateway-api/v1.1.0/config/crd/standard/gateway.networking.k8s.io_grpcroutes.yaml \
| kubectl apply -f -

The output is similar to:

customresourcedefinition.apiextensions.k8s.io/grpcroutes.gateway.networking.k8s.io created

What's next

• Set up an Envoy sidecar service mesh on GKE
• Set up a proxyless gRPC service mesh on GKE