docker_setup.yaml

docker_setup.yaml

---
- name: Setup Docker for all hosts
  hosts: all
  become: true
  tasks:

  - name: Install some base packages
    yum:
      name: "{{ item }}"
      state: latest
    with_items:
      - wget
      - git
      - net-tools
      - bind-utils
      - iptables-services
      - bridge-utils
      - bash-completion
      - dnsmasq
      - lsof
      - strace
      - nc
      - telnet
      - kexec-tools
      - sos
      - psacct
      - nfs-utils
      - tmux

  - name: Install specific docker version
    yum:
      name: docker
      state: docker-1.13.1

  - name: Check existence of docker disk
    stat:
      path: /dev/sdb
    register: sdb_disk

  - name: Stop Docker
    service:
      name: docker
      state: stopped

  - name: Remove the /dev/sdb1 disk if present
    parted:
      device: /dev/sdb
      number: 1
      state: absent
    when: sdb_disk.stat.exists == True

  - name: Unmount /var/lib/docker/containers
    mount:
      path: /var/lib/docker/containers
      state: umounted

  - name: Clear out docker dir
    file:
      path: /var/lib/docker/
      state: absent

  - name: Delete docker volume
    lvol:
      vg: docker-vg
      lv: docker-pool
      state: absent
      force: yes

  - name: Delete volume group
    lvg:
      vg: docker-vg
      state: absent
      force: yes

#  - name: Configure docker for insecure-registry
#    lineinfile:
#      path: /etc/sysconfig/docker
#      regexp: "^OPTIONS="
#      line: "OPTIONS='--insecure-registry=172.30.0.0/16 --selinux-enabled'"

  - name: Create docker-vg on physical host
    lvg:
      vg: docker-vg
      pvs: /dev/sda2
    when: sdb_disk.stat.exists == False

  - name: Edit docker-storage-setup on physical host
    copy:
      dest: /etc/sysconfig/docker-storage-setup
      content: "VG=docker-vg\n"
    when: sdb_disk.stat.exists == False

  - name: Edit docker-storage-setup on vm host
    copy:
      dest: /etc/sysconfig/docker-storage-setup
      content: "DEVS=/dev/sdb\nVG=docker-vg\n"
    when: sdb_disk.stat.exists == True
  
  - name: Clear out /etc/sysconfig/docker-storage
    copy:
      dest: /etc/sysconfig/docker-storage
      content: ""

  - name: Clean up /dev/sdb if present
    command: wipefs -a /dev/sdb
    when: sdb_disk.stat.exists == True

  - name: Run docker-storage-setup
    command: "/usr/bin/docker-storage-setup"

  - name: Start and enable docker
    service:
      name: docker
      state: started
      enabled: true

This is an ansible playbook that attempts to wipe out and clean a docker install. It makes certain assumptions about whether a machine is physical or VM based on the absence or presence of a virtual disk used for docker storage.

Renamed this to something legible.