3-k8s-worker-instance-prep.yaml

- name: Getting join command
  hosts: ctrlplane-instance
  tasks:
    - name: Run Command and Register Output
      command: kubeadm token create --print-join-command
      register: join_command

- name: Executing join command on worker nodes
  hosts: worker_instances
  tasks:
    - name: Executing join command on worker nodes
      command: "{{ hostvars[item]['join_command'].stdout }}"
      with_inventory_hostnames:
        - ctrlplane-instance  

- name: Get config file
  hosts: ctrlplane-instance
  tasks:
  - name: Create a copy of the kubectl config file which can be downloaded and used from outside
    copy:
      remote_src: yes
      src: /etc/kubernetes/admin.conf
      dest: /etc/kubernetes/admin.conf.remote

  - name: Replace the private IP address with the public IP address of 
    replace:
      path: /etc/kubernetes/admin.conf.remote
      regexp:  "192.168.*.*"
      replace: "{{ ansible_ssh_host }}:6443"

  - name: Fetch config file from ctrlplane-instance to ~/.kube/config
    fetch:
      src: /etc/kubernetes/admin.conf.remote
      dest: ~/.kube/config
      flat: yes
  
  - name: print out the new IP
    debug:
      msg: "{{ ansible_ssh_host }}"