Create demo Google Distributed Cloud admin and user clusters on Compute Engine VMs

Learn about Google Distributed Cloud by creating demo clusters on Compute Engine Virtual Machines (VMs). Creating an admin cluster and user cluster with this guide might take 40 minutes to an hour. The demo clusters you create in this guide help you evaluate the process for provisioning and operating Google Distributed Cloud clusters, but they aren't intended for use in production.

The document guides you through the process of running a script that:

  • Provisions five Compute Engine VMs for installing your demo clusters
  • Sets up a VPC network to provide cluster connectivity

Once the script provisions the necessary resources, you use one of the following clients to create an admin cluster and an accompanying user cluster that can host workloads: bmctl, Google Cloud console, Google Cloud CLI, or Terraform.

Procedure overview

This guide contains these primary steps:

  1. Prepare your local environment so that the script has the required environment variables and you've gathered the basic information needed to run commands.

  2. Create the VMs and network with the downloaded script.

  3. Create the admin cluster with one of the supported clients.

  4. Create the user cluster with one of the supported clients.

  5. Clean up to remove the clusters and VMs you created with this guide.

1. Prepare your local environment

Because this guide uses a script that sets up the network for you, you don't need to gather much information or do any planning. The following steps set up your local environment and gather the basic information you need in subsequent sections of the guide:

  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.

    Go to project selector

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

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

    Go to project selector

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

  6. Make a note of the project ID, because you need it to set an environment variable that is used in the script and commands on this page. If you selected an existing project, make sure that you are either a project owner or editor.
  7. You can run the script on Cloud Shell or your local machine running Linux or macOS. If you aren't using Cloud Shell:
    1. Make sure you have installed the latest Google Cloud CLI, the command line tool for interacting with Google Cloud. Update the gcloud CLI components, if needed: 
      gcloud components update

      Depending on how the gcloud CLI was installed, you might see the following message:

      You cannot perform this action because the Google Cloud CLI component manager is disabled for this installation. You can run the following command to achieve the same result for this installation:

      Follow the instructions to copy and paste the command to update the components.

    2. Make sure you have kubectl installed. If you need to install kubectl, run the following command: 
      gcloud components install kubectl
  8. Setup environment variables: 
    export PROJECT_ID=PROJECT_ID
export ADMIN_CLUSTER_NAME=ADMIN_CLUSTER_NAME
export ON_PREM_API_REGION=ON_PREM_API_REGION
export ZONE=ZONE
    • ADMIN_CLUSTER_NAME: the name you choose for the admin cluster.
    • ON_PREM_API_REGION: the Google Cloud region in which the GKE On-Prem API runs and stores its metadata. Specify us-central1 or another supported region.
    • ZONE: The Google Cloud zone that the Compute Engine VMs are created in. You can use us-central1-a or any of the other Compute Engine zones.
  9. Run the following commands to set the default project and zone. 
    gcloud config set project $PROJECT_ID
gcloud config set compute/zone $ZONE

    If you get a PERMISSION_DENIED error, double check the project ID that you entered. If the project ID is correct, run gcloud auth login to sign in to the gcloud CLI with the account that has access to the project.

  10. Get a list of supported versions that you can install: 
    gcloud container bare-metal admin-clusters query-version-config \
    --location=ON_PREM_API_REGION
  11. Select a version from the output of the previous command and set it in an environment variable: 
    export BMCTL_VERSION=BMCTL_VERSION

    We recommend that you select the highest compatible version to get the latest Google Distributed Cloud features and fixes.

2. Create the VMs and the network

In this section, you download and run the install_admin_cluster.sh script.

  1. Clone the anthos-samples repository and change to the directory where the script is located:

    git clone https://github.com/GoogleCloudPlatform/anthos-samples
cd anthos-samples/anthos-bm-gcp-bash

  2. Run the script:

    bash install_admin_cluster.sh

  3. At the prompt, enter 2 to set up the Compute Engine infrastructure only and confirm your selection when prompted.

    The script creates Compute Engine VMs, creates a VXLAN network, and sets up the admin workstation and cluster nodes. This infrastructure takes about 5 minutes to set up.

    To learn more about the script, click the following link:

    About the script

    You can view the script in the anthos-bm-gcp-bash folder in the anthos-samples GitHub repository. The script automates the following manual steps:

    1. Enables the following Google Cloud APIs: 
      anthos.googleapis.com
anthosaudit.googleapis.com
anthosgke.googleapis.com
cloudresourcemanager.googleapis.com
connectgateway.googleapis.com
container.googleapis.com
compute.googleapis.com
gkeconnect.googleapis.com
gkehub.googleapis.com
gkeonprem.googleapis.com
serviceusage.googleapis.com
stackdriver.googleapis.com
monitoring.googleapis.com
logging.googleapis.com
kubernetesmetadata.googleapis.com
iam.googleapis.com
opsconfigmonitoring.googleapis.com
    2. Instead of creating multiple service accounts for different APIs and services, the script creates a single service account called baremetal-gcr and grants it the following IAM roles:
      • roles/gkehub.admin
      • roles/gkehub.connect
      • roles/logging.logWriter
      • roles/monitoring.dashboardEditor
      • roles/monitoring.metricWriter
      • roles/monitoring.viewer
      • roles/opsconfigmonitoring.resourceMetadata.writer
      • roles/serviceusage.serviceUsageViewer
      • roles/stackdriver.resourceMetadata.writer
    3. Creates the following VMs:
      • One VM for the admin workstation.
      • One VM for the control plane node of the admin cluster.
      • Two VMs for the worker nodes of the user cluster.
      • One VM for the control plane node of the user cluster.
    4. Verifies that SSH is enabled on all VMs and that the admin workstation has SSH access to all the other VMs that were created for cluster nodes.
    5. Creates a Virtual Extensible LAN (VXLAN) overlay network for Layer 2 connectivity between the VMs. The VXLAN isn't persistent, so if you reboot a VM instance the network is destroyed. The network is set up to be on the 10.200.0.0/24 subnet. The Layer 2 connectivity is a requirement for the bundled load balancer.
    6. Installs the following tools on the admin workstation:
      • bmctl
      • kubectl
      • Docker

      The script also downloads the service account key for the baremetal-gcr service account to the admin workstation.

    7. Ensures that root@10.200.0.x from the admin workstation works by doing the following tasks:
      1. Generate a new SSH key on the admin workstation.
      2. Adds the public key to all the other VMs in the deployment.

    The script outputs each command it runs and the status. When it finishes, the script outputs the following:

    ✅ Successfully set up SSH access from admin workstation to cluster node VMs.

✅ GCE Infrastructure setup complete. Please check the logs for any errors!!!

✅ If you do not see any errors in the output log, then you now have the following setup:

|---------------------------------------------------------------------------------------------------------|
| VM Name               | L2 Network IP (VxLAN) | INFO                                                    |
|---------------------------------------------------------------------------------------------------------|
| abm-admin-cluster-cp  | 10.200.0.3            | 🌟 Ready for use as control plane for the admin cluster |
| abm-user-cluster-cp   | 10.200.0.4            | 🌟 Ready for use as control plane for the user cluster  |
| abm-user-cluster-w1   | 10.200.0.5            | 🌟 Ready for use as worker for the user cluster         |
| abm-user-cluster-w2   | 10.200.0.6            | 🌟 Ready for use as worker for the user cluster         |
|---------------------------------------------------------------------------------------------------------|

3. Create the admin cluster

bmctl

To create an admin cluster with bmctl, you access the admin workstation VM in a terminal window and run commands from there:

  1. Use SSH to access the admin workstation VM, abm-ws, as root:

    gcloud compute ssh root@abm-ws --zone ZONE

  2. Set your user credentials as Application Default Credentials (ADC):

    gcloud auth application-default login

    Follow the prompts to select your Google Account for ADC.

  3. Generate a cluster configuration file:

    bmctl create config -c ADMIN_CLUSTER_NAME --project-id=PROJECT_ID

  4. Verify the admin cluster configuration file:

    The following cluster configuration file is filled in with the values that you provided earlier. In addition to the values you entered, note the following differences from the generated configuration file:

    • Comments have been removed from this sample to improve readability.
    • The script creates a single service account with all required permissions and downloads the bm-gcr.json key referenced in the configuration file.
    gcrKeyPath: /root/bm-gcr.json
sshPrivateKeyPath: /root/.ssh/id_rsa
gkeConnectAgentServiceAccountKeyPath: /root/bm-gcr.json
gkeConnectRegisterServiceAccountKeyPath: /root/bm-gcr.json
cloudOperationsServiceAccountKeyPath: /root/bm-gcr.json
---
apiVersion: v1
kind: Namespace
metadata:
  name: cluster-ADMIN_CLUSTER_NAME
---
apiVersion: baremetal.cluster.gke.io/v1
kind: Cluster
metadata:
  name: ADMIN_CLUSTER_NAME
  namespace: cluster-ADMIN_CLUSTER_NAME
spec:
  type: admin
  profile: default
  anthosBareMetalVersion: BMCTL_VERSION
  gkeConnect:
    projectID: PROJECT_ID
  controlPlane:
    nodePoolSpec:
      nodes:
      - address: 10.200.0.3
  clusterNetwork:
    pods:
      cidrBlocks:
      - 192.168.0.0/16
    services:
      cidrBlocks:
      - 10.96.0.0/20
  loadBalancer:
    mode: bundled
    ports:
      controlPlaneLBPort: 443
    vips:
      controlPlaneVIP: 10.200.0.48
  clusterOperations:
    projectID: PROJECT_ID
    location: us-central1
  storage:
    lvpNodeMounts:
      path: /mnt/localpv-disk
      storageClassName: local-disks
    lvpShare:
      path: /mnt/localpv-share
      storageClassName: local-shared
      numPVUnderSharedPath: 5
  nodeConfig:
    podDensity:
      maxPodsPerNode: 110

  5. Replace the contents of the generated configuration file on your admin workstation with the contents from the preceding sample.

    Open the generated file, bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME.yaml and replace its contents with the contents of the sample you verified in the preceding step.

  6. Create the admin cluster:

    bmctl create cluster -c ADMIN_CLUSTER_NAME

    The bmctl command displays output to the screen as it runs preflight checks and creates the cluster. Verbose information is written to logs in the baremetal/bmctl-workspace/abm-user-cluster-metallb/log folder on the admin workstation.

    Cluster creation can take several minutes to finish.

  7. In the console, go to the GKE clusters page.

    Go to GKE clusters

    Make sure that the project in which you created the user cluster is selected. You should see the admin cluster listed.

  8. Sign in to the admin cluster:

    1. Click the link on the cluster name, and on the side panel, click Login.

    2. Select Use your Google identity to log in.

    3. Click Login.

Verify the admin cluster

You can find your admin cluster kubeconfig file on the admin workstation in the bmctl-workspace directory of the root account. To verify your deployment, complete the following steps:

  1. Use SSH to access the admin workstation as root:

    gcloud compute ssh root@abm-ws --zone ZONE

  2. Verify that your admin cluster was created and is running:

    kubectl --kubeconfig bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME-kubeconfig get nodes

    The output is similar to the following:

    NAME                   STATUS   ROLES                  AGE   VERSION
abm-admin-cluster-cp   Ready    control-plane   94m   v1.27.4-gke.1600

  3. When you are finished exploring, enter exit to disconnect from the admin workstation.

Console

To create an admin cluster in the console, you must run bmctl register bootstrap from the admin workstation VM to create a bootstrap cluster. While the bmctl register bootstrap command is running, you perform steps in the console to create the admin cluster.

Enter bootstrap environment basics

  1. In the Google Cloud console, go to the GKE clusters page.

    Go to GKE clusters

  2. Click Create.

  3. In the Create a cluster dialog select On-premises and click Configure for bare metal:

  4. Make sure to select PROJECT_ID from the project list.

  5. In the left-navigation bar, click Install bootstrap environment.

  6. Enter ADMIN_CLUSTER_NAME as the admin cluster name.

  7. Select BMCTL_VERSION as the version for your admin cluster. The script downloaded this version of the bmctl command-line tool to the admin workstation. The Google Distributed Cloud version that you install must match the bmctl version.

  8. In the Google Cloud API Location field, select ON_PREM_API_REGION from the list. This setting specifies the region where the GKE On-Prem API runs, and the region in which the following are stored:

    • The cluster metadata that the GKE On-Prem API needs to manage the cluster lifecycle
    • The Cloud Logging and Cloud Monitoring data of system components
    • The Admin Audit log created by Cloud Audit Logs

    The cluster name, project, and location together uniquely identify the cluster in Google Cloud.

Use the steps in the next section instead of the steps displayed in the console to create the bootstrap cluster. Leave the console page displayed because you continue there to create the admin cluster.

Create the bootstrap cluster

When you use an GKE On-Prem API client, such as the console, to create an admin cluster you need to create a bootstrap cluster on the admin workstation. The bootstrap cluster hosts the Kubernetes controllers needed to create the admin cluster.

  1. From the command line, use SSH to access the admin workstation VM as root:

    gcloud compute ssh root@abm-ws --zone ZONE

    You can ignore any messages about updating the VM and complete this tutorial. If you plan to keep the VMs as a test environment, you might want to update the OS or upgrade to the next release as described in the Ubuntu documentation.

  2. Set your user credentials as Application Default Credentials (ADC):

    gcloud auth application-default login

    Follow the prompts to select your Google Account for ADC.

  3. Change to the baremetal/ directory and run the following command to create the bootstrap cluster.

    The bootstrap cluster name is derived by prepending bootstrap- to the admin cluster name.

    bmctl register bootstrap \
  --ssh-key=/root/.ssh/id_rsa \
  --name=bootstrap-ADMIN_CLUSTER_NAME \
  --project-id=PROJECT_ID

    After bmctl successfully creates the bootstrap cluster, you see output similar to the following:

    [2023-03-22 17:35:24+0000] Waiting for the temporary cluster to be registered... OK
[2023-03-22 17:35:37+0000] Please go to https://console.cloud.google.com/home/dashboard?project=example-project-12345 to create the cluster
[2023-03-22 17:35:37+0000] Waiting for preflight checks and cluster to run..

Create the admin cluster

  1. On the Install bootstrap environment page in the Bootstrap environment from admin workstation section, click Check Connection.

    On success, the console displays Connection established.

    The connection to the bootstrap cluster must be established before you continue. If the connection isn't established, check the arguments that you specified to the bmctl register bootstrap command:

    • Make sure that the value for --name matches the Derived bootstrap name displayed in the Bootstrap environment basics section.

    • Make sure the value for --project-id matches the ID of the project that you selected in the console.

    If you need to change the bootstrap cluster name or the project ID, enter Ctrl-C to exit out of bmctl register bootstrap and re-run the command.

Networking

  1. Click Networking in the left-navigation bar.

  2. In the Control plane section, enter the following in the Control plane node IP 1 field:

    10.200.0.3

    This is the IP address of the abm-admin-cluster-cp VM in the VXLAN created by the script.

  3. In the Load balancer section, make sure that Bundled is selected.

  4. In the Virtual IPs (VIPs) section, enter the following in the Control plane VIP field:

    10.200.0.48

    The following step depends upon the availability of the bootstrap cluster. The bmctl register bootstrap command in the terminal window must run for a few minutes before the bootstrap cluster shows as a registered member. If, after a few minutes, it's still not available, check the bootstrap cluster name and project ID that you used. If you need to change the bootstrap cluster name or the project ID, enter Ctrl-C in the other terminal window to exit out of bmctl register bootstrap and re-run the command.

  5. Click Verify and Create.

    The console displays status messages as it verifies the settings and creates the cluster.

    When the admin cluster is created, the bootstrap cluster on the admin workstation is deleted. The output of the bmctl register bootstrap command in the other terminal window is similar to the following:

    ...
[2024-04-15 23:10:48+0000] Waiting for cluster to become ready OK
[2024-04-15 23:16:38+0000] Please run
[2024-04-15 23:16:38+0000] kubectl --kubeconfig bmctl-workspace/gce-admin-gcloud-001/gce-admin-gcloud-001-kubeconfig get nodes
[2024-04-15 23:16:38+0000] to get cluster nodes status.
[2024-04-15 23:16:38+0000] Waiting for node pools to become ready OK
[2024-04-15 23:16:58+0000] Waiting for metrics to become ready in GCP OK
[2024-04-15 23:21:58+0000] Waiting for cluster API provider to install in the created admin cluster OK
[2024-04-15 23:22:08+0000] Moving admin cluster resources to the created admin cluster
[2024-04-15 23:22:10+0000] Waiting for node update jobs to finish OK
[2024-04-15 23:24:30+0000] Flushing logs... OK
[2024-04-15 23:24:30+0000] Unregistering bootstrap cluster.
[2024-04-15 23:24:30+0000] Deleting membership... OK
[2024-04-15 23:24:32+0000] Deleting bootstrap cluster.

Verify the admin cluster

You can find your admin cluster kubeconfig file on the admin workstation in the bmctl-workspace directory of the root account. To verify your deployment, complete the following steps:

  1. Use SSH to access the admin workstation as root:

    gcloud compute ssh root@abm-ws --zone ZONE

  2. Verify that your admin cluster was created and is running:

    kubectl --kubeconfig bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME-kubeconfig get nodes

    The output is similar to the following:

    NAME                   STATUS   ROLES                  AGE   VERSION
abm-admin-cluster-cp   Ready    control-plane   94m   v1.27.4-gke.1600

  3. When you are finished exploring, enter exit to disconnect from the admin workstation.

gcloud CLI

The following instructions require two terminal windows. In one terminal window, you run bmctl register bootstrap to create a bootstrap cluster. While the bmctl register bootstrap command is running, you run gcloud container bare-metal admin-clusters create in another terminal window to create the admin cluster.

Create the bootstrap cluster

When you use an GKE On-Prem API client, such as the gcloud CLI, to create an admin cluster you need to create a bootstrap cluster on the admin workstation. The bootstrap cluster hosts the Kubernetes controllers needed to create the admin cluster.

  1. From the command line, use SSH to access the admin workstation VM as root:

    gcloud compute ssh root@abm-ws --zone ZONE

    You can ignore any messages about updating the VM and complete this tutorial. If you plan to keep the VMs as a test environment, you might want to update the OS or upgrade to the next release as described in the Ubuntu documentation.

  2. Set your user credentials as Application Default Credentials (ADC):

    gcloud auth application-default login

    Follow the prompts to select your Google Account for ADC.

  3. Change to the baremetal/ directory and run the following command to create the bootstrap cluster.

    The bootstrap cluster name is derived by prepending bootstrap- to the admin cluster name.

    bmctl register bootstrap \
  --ssh-key=/root/.ssh/id_rsa \
  --name=bootstrap-ADMIN_CLUSTER_NAME \
  --project-id=PROJECT_ID

    After bmctl successfully creates the bootstrap cluster, you see output similar to the following:

    [2023-03-22 17:35:24+0000] Waiting for the temporary cluster to be registered... OK
[2023-03-22 17:35:37+0000] Please go to https://console.cloud.google.com/home/dashboard?project=example-project-12345 to create the cluster
[2023-03-22 17:35:37+0000] Waiting for preflight checks and cluster to run..

Create the admin cluster

  1. In a new terminal window, confirm that the bootstrap cluster has been registered as a member of the fleet:

    gcloud container fleet memberships list \
    --project=PROJECT_ID

    The gcloud container bare-metal admin-clusters create command in the following step depends upon the availability of the bootstrap cluster. The bmctl register bootstrap command in the other terminal window must run for a few minutes before the bootstrap cluster shows as a registered member. If, after a few minutes, it's still not listed, check the bootstrap cluster name and project ID that you used. If you need to change the bootstrap cluster name or the project ID, enter Ctrl-C in the other terminal window to exit out of bmctl register bootstrap and re-run the command.

  2. Create the admin cluster with the bundled load balancer:

    Ensure that the values you specify match the environment variables that you specified earlier for the script.

    gcloud container bare-metal admin-clusters create ADMIN_CLUSTER_NAME \
    --project=PROJECT_ID \
    --location=ON_PREM_API_REGION \
    --version=BMCTL_VERSION \
    --max-pods-per-node=110 \
    --control-plane-vip=10.200.0.48 \
    --control-plane-load-balancer-port=443 \
    --control-plane-node-configs node-ip=10.200.0.3 \
    --island-mode-service-address-cidr-blocks=10.96.0.0/20 \
    --island-mode-pod-address-cidr-blocks=192.168.0.0/16 \
    --lvp-share-path=/mnt/localpv-share \
    --lvp-share-storage-class=local-shared \
    --lvp-node-mounts-config-path=/mnt/localpv-disk \
    --lvp-node-mounts-config-storage-class=local-disks

    In this command:

    • --control-plane-vip: Is set to 10.200.0.48. This is the virtual IP (VIP) on the load balancer for the cluster's Kubernetes API server.

    • --control-plane-node-configs: The node-ip is set to 10.200.0.3. This is the IP address of the abm-admin-cluster-cp VM in the VXLAN created by the script.

    For a complete list of the flags and their descriptions, see the gcloud CLI reference.

    The output from the command is similar to the following:

    Waiting for operation [projects/example-project-12345/locations/us-west1/operations/operation-1679543737105-5f7893fd5bae9-942b3f97-75e59179] to complete.

    In the example output, the string operation-1679543737105-5f7893fd5bae9-942b3f97-75e59179 is the OPERATION_ID of the long-running operation. You can find out the status of the operation by running the following command in another terminal window:

    gcloud container bare-metal operations describe OPERATION_ID \
    --project=PROJECT_ID \
    --location=ON_PREM_API_REGION

    When the gcloud container bare-metal admin-clusters create completes successfully, the output is similar to the following:

    Created Anthos on bare metal Admin Cluster
[https://gkeonprem.googleapis.com/v1/projects/anonuser-anonproject/locations/us-central1/bareMetalAdminClusters/gce-admin-gcloud-001].
NAME           LOCATION     VERSION           MEMBERSHIP     STATE
abm-cluster-1  us-central1  1.28.300-gke.131  abm-cluster-1  RUNNING

    When the admin cluster is created, the bootstrap cluster on the admin workstation is deleted. The output of the bmctl register bootstrap command in the other terminal window is similar to the following:

    ...
[2024-04-15 23:10:48+0000] Waiting for cluster to become ready OK
[2024-04-15 23:16:38+0000] Please run
[2024-04-15 23:16:38+0000] kubectl --kubeconfig bmctl-workspace/gce-admin-gcloud-001/gce-admin-gcloud-001-kubeconfig get nodes
[2024-04-15 23:16:38+0000] to get cluster nodes status.
[2024-04-15 23:16:38+0000] Waiting for node pools to become ready OK
[2024-04-15 23:16:58+0000] Waiting for metrics to become ready in GCP OK
[2024-04-15 23:21:58+0000] Waiting for cluster API provider to install in the created admin cluster OK
[2024-04-15 23:22:08+0000] Moving admin cluster resources to the created admin cluster
[2024-04-15 23:22:10+0000] Waiting for node update jobs to finish OK
[2024-04-15 23:24:30+0000] Flushing logs... OK
[2024-04-15 23:24:30+0000] Unregistering bootstrap cluster.
[2024-04-15 23:24:30+0000] Deleting membership... OK
[2024-04-15 23:24:32+0000] Deleting bootstrap cluster.

Verify the admin cluster

You can find your admin cluster kubeconfig file on the admin workstation in the bmctl-workspace directory of the root account. To verify your deployment, complete the following steps:

  1. Use SSH to access the admin workstation as root:

    gcloud compute ssh root@abm-ws --zone ZONE

  2. Verify that your admin cluster was created and is running:

    kubectl --kubeconfig bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME-kubeconfig get nodes

    The output is similar to the following:

    NAME                   STATUS   ROLES                  AGE   VERSION
abm-admin-cluster-cp   Ready    control-plane   94m   v1.27.4-gke.1600

  3. When you are finished exploring, enter exit to disconnect from the admin workstation.

Terraform

The following instructions require two terminal windows. In one terminal window, you run bmctl register bootstrap to create a bootstrap cluster. While the bmctl register bootstrap command is running, you run the Terraform commands in another terminal window to create the admin cluster.

Modify user cluster sample files to work for an admin cluster

The anthos-samples repository doesn't include a sample that is specifically for creating a Google Distributed Cloud admin cluster. The following steps show you how to create an admin cluster by modifying an existing user cluster Terraform sample.

  1. In the directory where you cloned anthos-samples, run the following command to copy the sample files for the MetalLB user cluster sample into a new folder for your admin cluster:

    cp -r anthos-samples/anthos-onprem-terraform/abm_user_cluster_metallb \
    anthos-samples/anthos-onprem-terraform/abm_admin_cluster_basic

  2. Change to the abm_admin_cluster_basic directory:

    cd anthos-samples/anthos-onprem-terraform/abm_admin_cluster_basic

  3. Edit the Terraform files:

    • variables.tf:

      • Define a variable for the control plane node IP addresses (though we use just one for this demo). This variable should be similar to variable "control_plane_ips" { ... } entry.

      • Define a variable for the control plane VIP address. This variable should be similar to variable "control_plane_vip" { ... } entry.

    • terraform.tfvars:

      • Assign variable values for the following admin cluster settings:

        • Control plane node IP addresses: 10.200.0.3

        • Control plane VIP address: 10.200.0.48

    • main.tf:

      • Replace the google_gkeonprem_bare_metal_cluster resource with the google_gkeonprem_bare_metal_admin_cluster resource.

      • Delete the google_gkeonprem_bare_metal_node_pool resource and related lifecycle section.

      • Update the resource to use the newly defined variables.

    Here's an example of how the main.tf file might look when it's edited to create an admin cluster:

    /**
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#[START anthos_onprem_terraform_bare_metal_admin_cluster_basic_main]

module "enable_google_apis_primary" {
  source     = "terraform-google-modules/project-factory/google//modules/project_services"
  version    = "~> 14.0"
  project_id = var.project_id
  activate_apis = [
    "anthos.googleapis.com",
    "anthosaudit.googleapis.com",
    "anthosgke.googleapis.com",
    "cloudresourcemanager.googleapis.com",
    "compute.googleapis.com",
    "connectgateway.googleapis.com",
    "container.googleapis.com",
    "file.googleapis.com",
    "gkehub.googleapis.com",
    "iam.googleapis.com",
    "kubernetesmetadata.googleapis.com",
    "logging.googleapis.com",
    "monitoring.googleapis.com",
    "opsconfigmonitoring.googleapis.com",
    "serviceusage.googleapis.com",
    "stackdriver.googleapis.com"
  ]
  disable_services_on_destroy = false
}

# Enable GKE OnPrem API
resource "google_project_service" "default" {
  project            = var.project_id
  service            = "gkeonprem.googleapis.com"
  disable_on_destroy = false
}

# Create an anthos baremetal admin cluster and enroll it with the gkeonprem API
resource "google_gkeonprem_bare_metal_admin_cluster" "admin-cluster-basic" {
  name                     = var.admin_cluster_name
  description              = "Anthos bare metal admin cluster"
  provider                 = google
  depends_on               = [google_project_service.default]
  location                 = var.region
  bare_metal_version       = var.bare_metal_version
  network_config {
    island_mode_cidr {
      service_address_cidr_blocks = ["0.96.0.0/20"]
      pod_address_cidr_blocks     = ["192.168.0.0/16"]
    }
  }
  node_config {
    max_pods_per_node = 250
  }
  control_plane {
    control_plane_node_pool_config {
      node_pool_config {
        operating_system = "LINUX"
        dynamic "node_configs" {
          for_each = var.admin_cp_ips
          content {
            node_ip = node_configs.value
          }
        }
      }
    }
  }
  load_balancer {
    port_config {
      control_plane_load_balancer_port = 443
    }
    vip_config {
      control_plane_vip = var.admin_cp_vip
    }
  }
  storage {
    lvp_share_config {
      lvp_config {
        path = "/mnt/localpv-share"
        storage_class = "local-shared"
      }
      shared_path_pv_count = 5
    }
    lvp_node_mounts_config {
      path = "/mnt/localpv-disk"
      storage_class = "local-disks"
    }
  }

  dynamic "security_config" {
    for_each = length(var.admin_user_emails) == 0 ? [] : [1]
    content {
      authorization {
        dynamic "admin_users" {
          for_each = var.admin_user_emails
          content {
            username = admin_users.value
          }
        }
      }
    }
  }

  lifecycle {
    ignore_changes = [
      annotations["onprem.cluster.gke.io/user-cluster-resource-link"],
      annotations["alpha.baremetal.cluster.gke.io/cluster-metrics-webhook"],
      annotations["baremetal.cluster.gke.io/operation"],
      annotations["baremetal.cluster.gke.io/operation-id"],
      annotations["baremetal.cluster.gke.io/start-time"],
      annotations["baremetal.cluster.gke.io/upgrade-from-version"]
    ]
  }
}

#[END anthos_onprem_terraform_bare_metal_admin_cluster_basic_main]

    For more information about the Terraform resource for admin clusters, see google_gkeonprem_bare_metal_admin_cluster in the Terraform registry.

Create the bootstrap cluster

When you use an GKE On-Prem API client, such as Terraform, to create an admin cluster you need to create a bootstrap cluster on the admin workstation. The bootstrap cluster hosts the Kubernetes controllers needed to create the admin cluster.

  1. From the command line, use SSH to access the admin workstation VM as root:

    gcloud compute ssh root@abm-ws --zone ZONE

    You can ignore any messages about updating the VM and complete this tutorial. If you plan to keep the VMs as a test environment, you might want to update the OS or upgrade to the next release as described in the Ubuntu documentation.

  2. Set your user credentials as Application Default Credentials (ADC):

    gcloud auth application-default login

    Follow the prompts to select your Google Account for ADC.

  3. Change to the baremetal/ directory and run the following command to create the bootstrap cluster.

    The bootstrap cluster name is derived by prepending bootstrap- to the admin cluster name.

    bmctl register bootstrap \
  --ssh-key=/root/.ssh/id_rsa \
  --name=bootstrap-ADMIN_CLUSTER_NAME \
  --project-id=PROJECT_ID

    After bmctl successfully creates the bootstrap cluster, you see output similar to the following:

    [2023-03-22 17:35:24+0000] Waiting for the temporary cluster to be registered... OK
[2023-03-22 17:35:37+0000] Please go to https://console.cloud.google.com/home/dashboard?project=example-project-12345 to create the cluster
[2023-03-22 17:35:37+0000] Waiting for preflight checks and cluster to run..

Create the admin cluster

  1. Initialize and create the Terraform plan:

    terraform init

    Terraform installs any needed libraries, such as the Google Cloud provider.

  2. Review the configuration and make changes if needed:

    terraform plan

  3. Apply the Terraform plan to create the admin cluster:

    terraform apply

    It takes 15 minutes or more to create the admin cluster. When the cluster creation completes, you see a message like the following:

    ...
google_gkeonprem_bare_metal_admin_cluster.admin-cluster-basic: Still creating... [20m10s elapsed]
google_gkeonprem_bare_metal_admin_cluster.admin-cluster-basic: Creation complete after 20m11s
[id=projects/anonuser-anonproject/locations/us-central1/bareMetalAdminClusters/gce-admin-terra002]

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

    When the admin cluster is created, the bootstrap cluster on the admin workstation is deleted. The output of the bmctl register bootstrap command in the other terminal window is similar to the following:

    ...
[2024-04-15 23:10:48+0000] Waiting for cluster to become ready OK
[2024-04-15 23:16:38+0000] Please run
[2024-04-15 23:16:38+0000] kubectl --kubeconfig bmctl-workspace/gce-admin-gcloud-001/gce-admin-gcloud-001-kubeconfig get nodes
[2024-04-15 23:16:38+0000] to get cluster nodes status.
[2024-04-15 23:16:38+0000] Waiting for node pools to become ready OK
[2024-04-15 23:16:58+0000] Waiting for metrics to become ready in GCP OK
[2024-04-15 23:21:58+0000] Waiting for cluster API provider to install in the created admin cluster OK
[2024-04-15 23:22:08+0000] Moving admin cluster resources to the created admin cluster
[2024-04-15 23:22:10+0000] Waiting for node update jobs to finish OK
[2024-04-15 23:24:30+0000] Flushing logs... OK
[2024-04-15 23:24:30+0000] Unregistering bootstrap cluster.
[2024-04-15 23:24:30+0000] Deleting membership... OK
[2024-04-15 23:24:32+0000] Deleting bootstrap cluster.

  4. In the console, go to the GKE clusters page.

    Go to GKE clusters

    Make sure that the project in which you created the user cluster is selected. You should see the admin cluster listed.

  5. Sign in to the admin cluster:

    1. Click the link on the cluster name, and on the side panel, click Login.

    2. Select Use your Google identity to log in.

    3. Click Login.

Verify the admin cluster

You can find your admin cluster kubeconfig file on the admin workstation in the bmctl-workspace directory of the root account. To verify your deployment, complete the following steps:

  1. Use SSH to access the admin workstation as root:

    gcloud compute ssh root@abm-ws --zone ZONE

  2. Verify that your admin cluster was created and is running:

    kubectl --kubeconfig bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME-kubeconfig get nodes

    The output is similar to the following:

    NAME                   STATUS   ROLES                  AGE   VERSION
abm-admin-cluster-cp   Ready    control-plane   94m   v1.27.4-gke.1600

  3. When you are finished exploring, enter exit to disconnect from the admin workstation.

4. Create the user cluster

You can use the Google Cloud console, the Google Cloud CLI, or Terraform to create the user cluster. For simplicity, use abm-user-cluster-metallb for the user cluster name, to match the hard-coded name in the Terraform scripts.

bmctl

  1. Use SSH to access the admin workstation VM, abm-ws, as root:

    gcloud compute ssh root@abm-ws --zone ZONE

  2. Generate a cluster configuration file:

    bmctl create config -c abm-user-cluster-metallb \
    --project-id=PROJECT_ID

  3. In the following user cluster configuration file, set your email address in the clusterSecurity section and verify the rest of the settings:

    The following cluster configuration file is filled in with the values that you entered in the planning table earlier. In addition to the values you entered, note the following differences from the generated configuration file:

    • Comments have been removed from this sample to improve readability.
    • Credentials section has been removed as is normal for user clusters.
    • The cluster type, spec.type, has been set to user.
    • The spec.clusterSecurity.authorization.clusterAdmin.gcpAccounts field was added to grant the clusterrole/cluster-admin to your account. Among other things, this field lets you sign in to your cluster in the Google Cloud console to see more cluster details.
    ---
apiVersion: v1
kind: Namespace
metadata:
  name: cluster-abm-user-cluster-metallb
---
apiVersion: baremetal.cluster.gke.io/v1
kind: Cluster
metadata:
  name: abm-user-cluster-metallb
  namespace: cluster-abm-user-cluster-metallb
spec:
  type: user
  profile: default
  anthosBareMetalVersion: BMCTL_VERSION
  gkeConnect:
    projectID: PROJECT_ID
  controlPlane:
    nodePoolSpec:
      nodes:
      - address: 10.200.0.4
  clusterNetwork:
    pods:
      cidrBlocks:
      - 192.168.0.0/16
    services:
      cidrBlocks:
      - 10.96.0.0/20
  loadBalancer:
    mode: bundled
    ports:
      controlPlaneLBPort: 443
    vips:
      controlPlaneVIP: 10.200.0.50
      ingressVIP: 10.200.0.51
    addressPools:
    - name: pool1
      addresses:
      - 10.200.0.51-10.200.0.70
  clusterOperations:
    projectID: PROJECT_ID
    location: us-central1
  clusterSecurity:
    authorization:
      clusterAdmin:
        gcpAccounts:
        - YOUR_EMAIL_ADDRESS
  storage:
    lvpNodeMounts:
      path: /mnt/localpv-disk
      storageClassName: local-disks
    lvpShare:
      path: /mnt/localpv-share
      storageClassName: local-shared
      numPVUnderSharedPath: 5
  nodeConfig:
    podDensity:
      maxPodsPerNode: 250
---
apiVersion: baremetal.cluster.gke.io/v1
kind: NodePool
metadata:
  name: node-pool-1
  namespace: cluster-abm-user-cluster-metallb
spec:
  clusterName: abm-user-cluster-metallb
  nodes:
  - address: 10.200.0.5

  4. Replace the contents of the generated configuration file on your admin workstation with the contents from the preceding sample.

    Open the generated file, bmctl-workspace/abm-user-cluster-metallb/abm-user-cluster-metallb.yaml and replace its contents with the contents of the sample you verified in the preceding step.

  5. Create the user cluster:

    bmctl create cluster -c abm-user-cluster-metallb \
  --kubeconfig bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME-kubeconfig

    The bmctl command displays output to the screen as it runs preflight checks and creates the cluster. Verbose information is written to logs in the baremetal/bmctl-workspace/abm-user-cluster-metallb/log folder on the admin workstation.

    Cluster creation can take several minutes to finish.

  6. In the Google Cloud console, go to the GKE clusters page.

    Go to GKE clusters

    Make sure that the project in which you created the user cluster is selected. You should see both the admin and user cluster on the list.

  7. Sign in to the user cluster:

    1. Click the link on the cluster name, and on the side panel, click Login.

    2. Select Use your Google identity to log in.

    3. Click Login.

    Repeat the same steps to sign in to the admin cluster.

Console

Do the following steps to create a user cluster in the console:

  1. In the console, go to the Create a bare metal cluster page.

    Go to Create a bare metal cluster

  2. Make sure that the Google Cloud project in which you created the admin cluster is selected.

  3. Click Create Cluster.

  4. In the dialog, click On-premises.

  5. Next to Bare metal, click Configure. The Prerequisites page displays.

  6. Under Choose your cluster type, select Create a user cluster for an existing admin cluster

  7. Click Next.

Cluster basics

  1. Enter a name for the user cluster or use the default.

  2. Make sure that the newly created admin cluster is selected. You can use the defaults for the rest of the settings on this page.

  3. Click Networking in the left-navigation bar.

Networking

The script that you ran to create VMs and the admin cluster also created a Layer 2 VXLAN with IP addresses in the 10.200.0.0/24 subnet.

  1. In the Control plane section, enter the following in the Control plane node IP 1 field:

    10.200.0.4

    This is the IP address of the abm-user-cluster-cp1 VM in the VXLAN created by the script.

  2. In the Load balancer section, use the default load balancer, Bundled with MetalLB.

  3. In the New address pool section, enter the following IP address range in the IP address range 1 field:

    10.200.0.51-10.200.0.70

  4. Click Done.

  5. In the Virtual IPs section, enter the following IP address in the Control Plane VIP field:

    10.200.0.50

  6. Enter the following IP address for the Ingress VIP:

    10.200.0.51

  7. Use the default IP addresses in the Service and Pod CIDRs section.

  8. Click default pool in the left-navigation bar.

Create a node pool

Your user cluster must have at least one node pool for worker nodes.

  1. Enter the following IP address in the Nodes address 1 field:

    10.200.0.5

    This is the IP address of the abm-user-cluster-w1 VM in the VXLAN created by the script.

Create the cluster

  1. Click Verify and Create to create the user cluster.

    It takes 15 minutes or more to create the user cluster. The console displays status messages as it verifies the settings and creates the cluster.

    If there is a problem with the configuration, the console displays an error message that should be clear enough for you to fix the configuration issue and try again to create the cluster.

    To see additional information about the creation process, click Show details to display a side panel. Click to close the details panel.

    When the cluster is created, Cluster status: running is displayed.

  2. After the cluster is created, click Clusters to go back to the Clusters page.

  3. Sign in to the user cluster:

    1. Click the link on the cluster name, and on the side panel, click Login.

    2. Select Use your Google identity to log in.

    3. Click Login.

    Repeat the same steps to sign in to the admin cluster.

gcloud CLI

To create the user cluster:

  1. Run the following command to create the user cluster:

    gcloud container bare-metal clusters create abm-user-cluster-metallb \
    --project=PROJECT_ID \
    --admin-cluster-membership=projects/PROJECT_ID/locations/ON_PREM_API_REGION/memberships/ADMIN_CLUSTER_NAME \
    --location=ON_PREM_API_REGION \
    --version=BMCTL_VERSION \
    --admin-users=YOUR_EMAIL_ADDRESS \
    --metal-lb-address-pools='pool=lb-pool-1,manual-assign=True,addresses=10.200.0.51-10.200.0.70' \
    --control-plane-node-configs='node-ip=10.200.0.4' \
    --control-plane-vip=10.200.0.50 \
    --control-plane-load-balancer-port=443 \
    --ingress-vip=10.200.0.51 \
    --island-mode-service-address-cidr-blocks=10.96.0.0/20 \
    --island-mode-pod-address-cidr-blocks=192.168.0.0/16 \
    --lvp-share-path=/mnt/localpv-share \
    --lvp-share-storage-class=local-shared \
    --lvp-node-mounts-config-path=/mnt/localpv-disk \
    --lvp-node-mounts-config-storage-class=local-disks

    After running the command, you see output like the following:

    Waiting for operation [projects/PROJECT_ID/locations/ON_PREM_API_REGION/operations/operation-1678304606537-5f668bde5c57e-341effde-b612ff8a] to complete...

    In the example output, the string operation-1678304606537-5f668bde5c57e-341effde-b612ff8a is the OPERATION_ID of the long-running operation.

  2. To find out the status of the operation, open another terminal window and run the command.

    gcloud container bare-metal operations describe OPERATION_ID \
    --project=PROJECT_ID \
    --location=ON_PREM_API_REGION

    Replace OPERATION_ID with the corresponding string from the output of the preceding step.

    It takes about 15 minutes or more to create the cluster. As the cluster is being created, you can run the previous command every so often to get the current status.

    When the cluster is created, you see output like the following:

    Created Anthos cluster on bare metal [https://gkeonprem.googleapis.com/v1/projects/PROJECT_ID/locations/ON_PREM_API_REGION/bareMetalClusters/abm-user-cluster-metallb].

    For more information about the gcloud container bare-metal clusters create command, including descriptions of each flag, see the container bare-metal clusters create page for the clusters resource in the gcloud CLI reference.

Create a node pool

After the cluster is successfully created, you can create a node pool for the cluster.

To create a node pool:

  1. Run the following command to create a node pool:

    gcloud container bare-metal node-pools create NODE_POOL_NAME \
    --cluster=abm-user-cluster-metallb \
    --project=PROJECT_ID \
    --location=ON_PREM_API_REGION \
    --node-configs='node-ip=10.200.0.5'

    Replace NODE_POOL_NAME with a name for the node pool.

    After running the command, you see output like the following:

    Waiting for operation [projects/PROJECT_ID/locations/ON_PREM_API_REGION/operations/operation-1678308682052-5f669b0d132cb-6ebd1c2c-816287a7] to complete...

    It takes about 5 minutes or less to create the node pool. When the node pool is created, you see output like the following:

    Created node pool in Anthos cluster on bare metal [https://gkeonprem.googleapis.com/v1/projects/PROJECT_ID/locations/ON_PREM_API_REGION/bareMetalClusters/abm-user-cluster-metallb/bareMetalNodePools/NODE_POOL_NAME].

  2. Go to the Create a bare metal cluster page in the console:

    Go to the Create a bare metal cluster page

    Make sure that the project in which you created the user cluster is selected. You should see both the admin and user cluster on the list.

  3. Sign in to the user cluster:

    1. Click the link on the cluster name, and on the side panel, click Login.

    2. Select Use your Google identity to log in.

    3. Click Login.

    Repeat the same steps to sign in to the admin cluster.

Terraform

You can use the following basic configuration sample to create a user cluster with bundled MetalLB load balancer. For more information, see the google_gkeonprem_bare_metal_cluster reference documentation.

  1. In the directory where you cloned anthos-samples, change to the directory where the Terraform sample is located:

    cd anthos-samples/anthos-onprem-terraform/abm_user_cluster_metallb

    The sample provides an example variables file to pass in to main.tf.

  2. Make a copy of the terraform.tfvars.sample file:

    cp terraform.tfvars.sample terraform.tfvars

  3. Verify the values in the following sample:

    The following Terraform variables file, terraform.tfvars.sample, is prefilled with IP addresses and with values that you entered in preceding sections of this guide.

    
project_id          = "PROJECT_ID"
region              = "ON_PREM_API_REGION"
admin_cluster_name  = "ADMIN_CLUSTER_NAME"
bare_metal_version  = "VERSION"
admin_user_emails   = ["YOUR_EMAIL_ADDRESS", "ADMIN_2_EMAIL_ADDRESS"]
cluster_name        = "abm-user-cluster-metallb"
control_plane_ips   = ["10.200.0.4"]
worker_node_ips     = ["10.200.0.5", "10.200.0.6"]
control_plane_vip   = "10.200.0.50"
ingress_vip         = "10.200.0.51"
lb_address_pools    = [
    { name = "lbpool_1", addresses = ["10.200.0.51-10.200.0.70"] }
]

    Replace ADMIN_2_EMAIL_ADDRESS with an email address that is associated with your Google Cloud account or remove it when you edit the variables file.

    For more information about the arguments in this sample for which you're setting variables, see Argument Reference in the Terraform documentation for Google Distributed Cloud user clusters.

  4. Replace the contents of your copy of the variables file with the contents from the preceding sample.

  5. Initialize and create the Terraform plan:

    terraform init

    Terraform installs any needed libraries, such as the Google Cloud provider.

  6. Review the configuration and make changes if needed:

    terraform plan

  7. Apply the Terraform plan to create the user cluster:

    terraform apply

    It takes 15 minutes or more to create the user cluster. You can view the cluster in the Google Cloud console on the GKE clusters page.

  8. In the Google Cloud console, go to the GKE clusters page.

    Go to GKE clusters

    Make sure that the project in which you created the user cluster is selected. You should see both the admin and user cluster on the list.

  9. Sign in to the user cluster:

    1. Click the link on the cluster name, and on the side panel, click Login.

    2. Select Use your Google identity to log in.

    3. Click Login.

    Repeat the same steps to sign in to the admin cluster.

5. Clean up

Use the following instructions to remove the clusters and VMs you created with this guide.

Delete the user cluster

bmctl

  • To delete the user cluster with bmctl, run the following command from the admin workstation VM, abm-ws:

    bmctl reset \
    --cluster abm-user-cluster-metallb \
    --admin-kubeconfig bmctl-workspace/ADMIN_CLUSTER_NAME/ADMIN_CLUSTER_NAME-kubeconfig

Console

  1. In the console, go to the GKE clusters page.

    Go to GKE clusters

  2. In the list of clusters, click the user cluster.

  3. In the Details panel, click View more details.

  4. Near the top of the window, click Delete.

  5. When prompted to confirm, enter the cluster name and click Delete.

  6. Click in the top-right corner to view the status of the deletion. You might have to refresh the page to update the clusters list.

gcloud CLI

  • To delete the cluster, run the following command:

    gcloud container bare-metal clusters delete abm-user-cluster-metallb \
    --project=PROJECT_ID \
    --location=ON_PREM_API_REGION \
    --force

    The --force flag lets you delete a cluster that has node pools. Without the --force flag, you have to delete the node pools first, and then delete the cluster.

For information about other flags, see gcloud container bare-metal clusters delete.

Terraform

The terraform destroy command terminates resources that were create when you ran terraform apply to create the user cluster.

  • Run the following command from the directory where the Terraform user cluster sample files, such as main.tf are located:

    terraform destroy

Wait for the user cluster to be deleted before deleting the admin cluster and VMs.

Delete the admin cluster and VMs

  1. Unenroll the admin cluster from the GKE On-Prem API:

    gcloud container bare-metal admin-clusters unenroll ADMIN_CLUSTER_NAME \
    --project=PROJECT_ID \
    --location=ON_PREM_API_REGION

  2. Connect to the admin workstation:

    gcloud compute ssh root@abm-ws --zone ZONE

  3. Delete the admin cluster:

    bmctl reset -c ADMIN_CLUSTER_NAME

    bmctl unregisters the cluster from the fleet and then deletes the cluster. Wait for the cluster to be deleted before deleting the VMs.

  4. Exit the admin workstation:

    exit

  5. List all VMs that have abm in their name:

    gcloud compute instances list | grep 'abm'

  6. Verify that you're fine with deleting all VMs that contain abm in the name.

    After you've verified, you can delete abm VMs by running the following command:

    gcloud compute instances list --format="value(name)" | \
    grep 'abm' | \
    xargs gcloud compute instances delete --quiet --zone ZONE

  7. Run the following command to delete the service account and, when prompted, enter y:

    gcloud iam service-accounts delete baremetal-gcr@PROJECT_ID.iam.gserviceaccount.com

    What's next