master.yaml

---
- hosts: masters
  become: yes
  vars:
    pod_network_cidr: "10.244.0.0/16"
    flannel_url: "https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml"

  tasks:
    - name: Remove kubeadm cache files
      file:
        name: "{{ item }}"
        state: absent
      loop:
        - "cluster_reseted.txt"
        - "cluster_initialized.txt"

    - name: Reset kubeadm components
      shell: "kubeadm reset --force >> cluster_reseted.txt"
      args:
        chdir: $HOME
        creates: cluster_reseted.txt

    - name: Initalize the cluster
      shell: kubeadm init --pod-network-cidr={{ pod_network_cidr }} >> cluster_initialized.txt
      args:
        chdir: $HOME
        creates: cluster_initialized.txt

    - name: Create .kube directory
      become: yes
      become_user: sysops
      file:
        path: $HOME/.kube
        state: directory
        mode: 0755
    
    - name: Copy admin.conf to user's .kube config
      copy:
        src: /etc/kubernetes/admin.conf
        dest: /home/sysops/.kube/config
        remote_src: yes
        owner: sysops
    
    - name: Install Pod network
      become: yes
      become_user: sysops
      shell: |
        kubectl apply -f {{ flannel_url }} >> pod_network_setup.txt
      args:
        chdir: $HOME
        creates: pod_network_setup.txt