kubekey/builtin/core/roles/etcd/tasks/expansion.yaml

- name: Expansion | Expand cluster on existing etcd nodes
  when: .etcd_install_LoadState.stdout | eq "loaded"
  block:
    - name: Expansion | Update /etc/etcd.env configuration file
      template:
        src: etcd.env
        dest: /etc/etcd.env
    - name: Expansion | Restart etcd service
      command: |
        systemctl restart etcd.service        
    - name: Expansion | Verify etcd service becomes healthy within 1 minute
      command: |
        for ((i=1; i<=12; i++)); do
          if ETCDCTL_API=3 etcdctl \
            --endpoints=https://localhost:2379 \
            --cacert=/etc/ssl/etcd/ssl/ca.crt \
            --cert=/etc/ssl/etcd/ssl/server.crt \
            --key=/etc/ssl/etcd/ssl/server.key \
            endpoint health >/dev/null 2>&1; then
            echo "✅ etcd is health"
            exit 0
          fi
          sleep 5
        done
        echo "❌ etcd etcd is not health in 1 minute"
        exit 1        

- name: Expansion | Add new etcd member from non-installed node
  when: .etcd_install_LoadState.stdout | eq "not-found"
  delegate_to: "{{ .installed_etcd }}"
  command: |
    ETCDCTL_API=3 etcdctl \
      --endpoints=https://localhost:2379 \
      --cacert=/etc/ssl/etcd/ssl/ca.crt \
      --cert=/etc/ssl/etcd/ssl/server.crt \
      --key=/etc/ssl/etcd/ssl/server.key \
      member add {{ .inventory_hostname }}