step-2-cluster-init.yaml

- hosts: master
  become: yes
  tasks:
    - name: Initialize the kubernetes cluster (creating /etc/kubernetes/admin.conf). kube-flannel REQUIRES cidr 10.244.0.0/16.
      shell: kubeadm init --pod-network-cidr=10.244.0.0/16 > kubeadm-init-output.txt 2>&1 || { cat kubeadm-init-output.txt; rm -f kubeadm-init-output.txt; false; }
      args:
        chdir: $HOME
        creates: kubeadm-init-output.txt

    - name: Create $HOME/.kube directory
      become: yes
      become_user: centos
      file:
        path: $HOME/.kube
        state: directory
        mode: 0755

    - name: Copy /etc/kubernetes/admin.conf to user directory, for using kubectl
      copy:
        src: /etc/kubernetes/admin.conf
        dest: /home/centos/.kube/config
        remote_src: yes
        owner: centos
        group: centos

    - name: Install kube-flannel pod network
      become: yes
      become_user: centos
      shell: kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml > kubectl-apply-flannel-output.txt 2>&1 || { cat kubectl-apply-flannel-output.txt; rm -f kubectl-apply-flannel-output.txt; false; }
      args:
        chdir: /home/centos
        creates: kubectl-apply-flannel-output.txt