k8s/installation/basic/install_docker_playbook.yml

- hosts: k8s-all
  remote_user: root
  vars: 
     docker_version: 18.09.2

  tasks: 
     - name: install dependencies
       #shell: yum install -y yum-utils device-mapper-persistent-data lvm2 
       yum: name={{item}} state=present
       with_items:
          - yum-utils
          - device-mapper-persistent-data
          - lvm2

     - name: config yum repo
       shell: yum-config-manager --add-repo https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo

     - name: install docker
       yum: name=docker-ce-{{docker_version}} state=present

     - name: start docker
       shell: systemctl enable docker && systemctl start docker