Pre-requisite

• Install terraform v1.5.5
• Setup the aws cli credentials with default profile name.

Setup

1. Apply the terraform project.

terraform init; terraform apply

This will create one k8s master/control-plane node along with two worker nodes.

This will output

• ssh commands to access the swarm nodes.

3. Ssh into the k8s master node(ssh command details available in terraform apply output from step 2)
4. [Run on Manager Node] Get the join-token and ca cert hash:

kubeadm token list
openssl x509 -pubkey -in /etc/kubernetes/pki/ca.crt | openssl rsa -pubin -outform der 2>/dev/null | \
   openssl dgst -sha256 -hex | sed 's/^.* //'

5. Copy the token and cert sha.

6. Ssh into worker nodes(ssh command details available in terraform apply output from step 2)

7. [Run on all workers nodes]Run join token command along with token&hash(copied from step 4). control-plane-host is the private ip of the master node.

kubeadm join --token <token> <control-plane-host>:6443 --discovery-token-ca-cert-hash sha256:<hash>