Prerequisites for clusters on Google Cloud

Before you install Knative serving in your cluster on Google Cloud, you must first ensure that you meet the following requirements:

• Review and understand the access permissions of components in Knative serving.

• You must ensure that you have adequate permissions in your Google Cloud project to meet the installation requirements for your cluster, fleet, and Cloud Service Mesh:

  • If you have the Owner role for the Google Cloud project, then you have more than the necessary permissions to create clusters, install, and then configure Knative serving.

  • Note that the Cloud Service Mesh permissions requirements also meet all the permission requirements for installing and configuring Knative serving.

  • Using other roles and the minimum requirements:

    Depending on your organization, you can also meet the permission requirements through a combination of the following predefined roles:

    • Google Cloud project permissions: Basic Editor role

    • Fleet permissions: GKE Hub Admin or a role that includes the following permissions:

      • gkehub.features.create
      • gkehub.features.update

    • Cluster permissions: A Kubernetes Engine Admin Role:

      • Kubernetes Engine Admin
      • Kubernetes Engine Cluster Admin

• A cluster with the following configuration is required:

  • A supported Google Kubernetes Engine cluster. Note that GKE clusters that have Windows Server node pools are unsupported.

  • Registered to a fleet:

    Go to GKE clusters

    Tip: Workload Identity Federation for GKE allows you to authenticate to Google Cloud services and it's also required by Cloud Service Mesh. Enabling fleet Workload Identity Federation in your cluster during fleet registration can reduce the configuration and deployment time.

    To learn how to register your cluster and enable Workload Identity Federation for GKE in your fleet, see Registering a cluster. Supported cluster types outside Google Cloud are registered by default.

  • In-cluster Cloud Service Mesh version 1.18 or later is installed. Additionally, note the following prerequisites:

    • The Google-managed Cloud Service Mesh control plane is currently not fully supported by Knative serving. Use the in-cluster control plane instead.
    • Cloud Service Mesh requires that your cluster use a machine type with at least 4 vCPUs, such as e2-standard-4. See the Cloud Service Mesh installation guide for details about requirements. If you need to change your existing cluster's machine type, see Migrating workloads to different machine types.
    • In order to benefit from the automated provisioning of test domains - Cloud Service Mesh uses an ingress gateway and a service named istio-ingress in namespace istio-system. To enable creation of the gateway during the feature installation use --option legacy-default-ingressgateway of asmcli installation script.

• The command-line environment must be set up.

• The following APIs must be enabled in your Google Cloud project:

  • Google Kubernetes Engine API: Build and manage container-based applications.
  • Cloud Build API: Create and manage builds.
  • Container Registry API: Push and pull images in Container Registry.

  Enable the APIs in the Google Cloud console