kubernetes_worker_prerequisites.yml

---
- name: Generate Hosts File
  hosts: worker
  become: true
  gather_facts: true
  tasks:
    - name: Upgrade all packages
      yum: name=* state=latest
    - name: Install Docker
      package:
        name: docker
        state: latest
      become: yes
    - name: Start Docker service
      service:
        name: docker
        state: started
        enabled: yes
      become: yes
    - name: Disable SELinux
      selinux:
        state: disabled
    - name: Reboot the machine
      reboot:
    - name: Copy /etc/yum.repos.d/kubernetes.repo
      copy:
        src: /opt/ansible/files/kubernetes.repo
        dest: /etc/yum.repos.d/kubernetes.repo
        owner: root
        group: root
        mode: '0644'
    - name: Upgrade all packages
      yum: name=* state=latest
    - name: Install Kubernetes Package
      yum:
        name: "{{packages}}"
        state: present
      vars:
        packages:
          - kubelet
          - kubeadm
          - kubectl
    - name: Enable / Start kubelet Service
      service:
        name: kubelet
        state: started
        enabled: yes
    - name: Letting iptables see bridged traffic
      copy:
        src: /opt/k8s/files/k8s.conf
        dest: /etc/sysctl.d/k8s.conf
        owner: root
        group: root
        mode: '0644'
    - name: Reload sysctl config for iptables
      command: sysctl --system
    - name: Disable SWAP
      command: swapoff -a