# https://www.reddit.com/r/ansible/comments/sn9l9d/microk8s_join_cluster_with_ansible/
# https://canonical.com/microk8s/docs/getting-started
# https://docs.ansible.com/projects/ansible/latest/collections/kubernetes/core/docsite/kubernetes_scenarios/scenario_k8s_object.html
# https://www.reddit.com/r/kubernetes/comments/1cdfq13/microk8s_clustering_connection_filed_invalid/
---
- hosts: all
  become: true
  vars_files:
    - vars/default.yml

  tasks:
    - name: Update prerequisites
      apt:
        update_cache: true

  #Install dependencies
    - name: Install Snap packet
      apt: 
        name: [ 'snap' ]
        state: present

    - name: Install microk8s for All Node
      become: true # needed if the other tasks are not played as root
      snap:
        name: microk8s
        classic: yes
        channel: stable

# Control Node, create join key for worker joins
- hosts: "controlnode"
  become: true
  tasks:
    # Create join key
    - name: Create join key
      # --token-ttl to avoid ERROR 500
      shell: microk8s add-node --token-ttl 300
      register: join_cluster
      run_once: true

    - name: Create persistent var
      set_fact:
        #join: "{{ join_cluster.stdout_lines[4] | regex_replace('10\\.0\\.2\\.15', '192.168.56.141') }}"
        join: "{{ join_cluster.stdout_lines[4] | regex_replace('[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+', hostvars[groups['controlnode'][0]]['ansible_ssh_host']) }}"
        run_once: true

    # DEBUG: We want to see if we have the good IP or not, if not we cannot join the control
    # Normally, it will use eht0 or docker bridge IP so we have to change
    - name: Test var
      debug:
        var: join

# Tâche 2 : Provisionnement du Worker node
# Worker Node, join from Control Node
- hosts: "workernode"
  become: true
  tasks:

    # Join clustor with
    - name: Join cluster
      # Have to use microk8s-controller here instead of a group controlnode
      #shell: "{{ hostvars['microk8s-controller']['join'] }}"
      # But because of it see the IP of the machine virtual, so we have to use IP of real host assigned
      shell: "{{ hostvars[groups['controlnode'][0]]['join'] }} --skip-verify"

- hosts: "controlnode"
  become: true
  tasks:
    # Tâche 3: Déploiement d'un service dans le cluster
    #Install dependencies
    - name: Install Snap packet
      apt:
        name: [ 'python3-pip' ]
        state: present

    - name: Install kubernetes
      pip:
        name: kubernetes
        executable: pip3

    - name: Create Nginx pod
      kubernetes.core.k8s:
        kubeconfig: /var/snap/microk8s/current/credentials/client.config
        state: present
        definition:
          apiVersion: v1
          kind: Pod
          metadata:
            name: nginx-service
            namespace: default
          spec:
            containers:
              - name: nginx
                image: nginx:stable-alpine-perl

    #Tache 3.3: Vérifiez que le pod est bien déployé.
    - name: Verify nginx works
      kubernetes.core.k8s_info:
        kubeconfig: /var/snap/microk8s/current/credentials/client.config
        kind: Pod
        namespace: default
      register: nginx_info

    - name: Debug pod's infomations
      debug:
        var: nginx_info.resources