Try Google Distributed Cloud on Compute Engine VMs

Create six VMs in Compute Engine

Complete these steps to create the following VMs:

• One admin VM used to deploy Google Distributed Cloud to the other machines.
• Three VMs for the three control plane nodes needed to run the Google Distributed Cloud control plane.
• Two VMs for the two worker nodes needed to run workloads on the Google Distributed Cloud cluster.

Create a vxlan network with L2 connectivity between VMs

Use the standard vxlan functionality of Linux to create a network that connects all the VMs with L2 connectivity.

The following command contains two loops that perform the following actions:

1. SSH into each VM
2. Update and install needed packages

3. Execute the required commands to configure the network with vxlan

   i=2 # We start from 10.200.0.2/24
   for vm in "${VMs[@]}"
   do
       gcloud compute ssh root@"$vm" --zone "${ZONE}" << EOF
           apt-get -qq update > /dev/null
           apt-get -qq install -y jq > /dev/null
           set -x
           ip link add vxlan0 type vxlan id 42 dev ens4 dstport 0
           current_ip=\$(ip --json a show dev ens4 | jq '.[0].addr_info[0].local' -r)
           printf "VM IP address is: \$current_ip"
           for ip in ${IPs[@]}; do
               if [ "\$ip" != "\$current_ip" ]; then
                   bridge fdb append to 00:00:00:00:00:00 dst \$ip dev vxlan0
               fi
           done
           ip addr add 10.200.0.$i/24 dev vxlan0
           ip link set up dev vxlan0
   
   EOF
       i=$((i+1))
   done

You now have L2 connectivity within the 10.200.0.0/24 network. The VMs have the following IP addresses:

• Admin VM: 10.200.0.2
• VMs running the control plane nodes:
  • 10.200.0.3
  • 10.200.0.4
  • 10.200.0.5
• VMs running the worker nodes:
  • 10.200.0.6
  • 10.200.0.7

Install prerequisites for Google Distributed Cloud

The following tools are needed on the admin machine before installing Google Distributed Cloud:

• bmctl
• kubectl
• Docker

1. Run the following command to install the needed tools:

   gcloud compute ssh root@$VM_WS --zone "${ZONE}" << EOF
   set -x
   
   export PROJECT_ID=\$(gcloud config get-value project)
   BMCTL_VERSION=\$(curl http://metadata.google.internal/computeMetadata/v1/instance/attributes/bmctl_version -H "Metadata-Flavor: Google")
   export BMCTL_VERSION
   
   gcloud iam service-accounts keys create bm-gcr.json \
     --iam-account=baremetal-gcr@\${PROJECT_ID}.iam.gserviceaccount.com
   
   curl -LO "https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl"
   
   chmod +x kubectl
   mv kubectl /usr/local/sbin/
   mkdir baremetal && cd baremetal
   gsutil cp gs://anthos-baremetal-release/bmctl/$BMCTL_VERSION/linux-amd64/bmctl .
   chmod a+x bmctl
   mv bmctl /usr/local/sbin/
   
   cd ~
   printf "Installing docker"
   curl -fsSL https://get.docker.com -o get-docker.sh
   sh get-docker.sh
   EOF

2. Run the following commands to ensure that root@10.200.0.x works. The commands perform these tasks:

   1. Generate a new SSH key on the admin machine.
   2. Add the public key to all the other VMs in the deployment.

   gcloud compute ssh root@$VM_WS --zone "${ZONE}" << EOF
   set -x
   ssh-keygen -t rsa -N "" -f /root/.ssh/id_rsa
   sed 's/ssh-rsa/root:ssh-rsa/' ~/.ssh/id_rsa.pub > ssh-metadata
   for vm in ${VMs[@]}
   do
       gcloud compute instances add-metadata \$vm --zone ${ZONE} --metadata-from-file ssh-keys=ssh-metadata
   done
   EOF

Deploy an Google Distributed Cloud cluster

The following code block contains all commands and configurations needed to complete the following tasks:

1. Create the configuration file for the needed hybrid cluster.
2. Run the preflight checks.
3. Deploy the cluster.

gcloud compute ssh root@$VM_WS --zone "${ZONE}" <<EOF
set -x
export PROJECT_ID=$(gcloud config get-value project)
CLUSTER_NAME=\$(curl http://metadata.google.internal/computeMetadata/v1/instance/attributes/cluster_id -H "Metadata-Flavor: Google")
BMCTL_VERSION=\$(curl http://metadata.google.internal/computeMetadata/v1/instance/attributes/bmctl_version -H "Metadata-Flavor: Google")
export CLUSTER_NAME
export BMCTL_VERSION
bmctl create config -c \$CLUSTER_NAME
cat > bmctl-workspace/\$CLUSTER_NAME/\$CLUSTER_NAME.yaml << EOB
---
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-\$CLUSTER_NAME
---
apiVersion: baremetal.cluster.gke.io/v1
kind: Cluster
metadata:
  name: \$CLUSTER_NAME
  namespace: cluster-\$CLUSTER_NAME
spec:
  type: hybrid
  anthosBareMetalVersion: \$BMCTL_VERSION
  gkeConnect:
    projectID: \$PROJECT_ID
  controlPlane:
    nodePoolSpec:
      clusterName: \$CLUSTER_NAME
      nodes:
      - address: 10.200.0.3
      - address: 10.200.0.4
      - address: 10.200.0.5
  clusterNetwork:
    pods:
      cidrBlocks:
      - 192.168.0.0/16
    services:
      cidrBlocks:
      - 172.26.232.0/24
  loadBalancer:
    mode: bundled
    ports:
      controlPlaneLBPort: 443
    vips:
      controlPlaneVIP: 10.200.0.49
      ingressVIP: 10.200.0.50
    addressPools:
    - name: pool1
      addresses:
      - 10.200.0.50-10.200.0.70
  clusterOperations:
    # might need to be this location
    location: us-central1
    projectID: \$PROJECT_ID
  storage:
    lvpNodeMounts:
      path: /mnt/localpv-disk
      storageClassName: node-disk
    lvpShare:
      numPVUnderSharedPath: 5
      path: /mnt/localpv-share
      storageClassName: local-shared
  nodeConfig:
    podDensity:
      maxPodsPerNode: 250
---
apiVersion: baremetal.cluster.gke.io/v1
kind: NodePool
metadata:
  name: node-pool-1
  namespace: cluster-\$CLUSTER_NAME
spec:
  clusterName: \$CLUSTER_NAME
  nodes:
  - address: 10.200.0.6
  - address: 10.200.0.7
EOB

bmctl create cluster -c \$CLUSTER_NAME
EOF

Verify your cluster

You can find your cluster's kubeconfig file on the admin machine in the bmctl-workspace directory. To verify your deployment, complete the following steps.

1. SSH into the admin workstation:

   gcloud compute ssh root@$VM_WS --zone ${ZONE}
   

2. Set the KUBECONFIG environment variable with the path to the cluster's configuration file to run kubectl commands on the cluster.

   export clusterid=CLUSTER_NAME
   export KUBECONFIG=$HOME/bmctl-workspace/$clusterid/$clusterid-kubeconfig
   kubectl get nodes
   

Log in to your cluster from Google Cloud console

To observe your workloads on Google Distributed Cloud in the Google Cloud console, you must log in to your admin machine where the cluster's kubeconfig file is stored.