ansible-role-container-registry/tasks/docker.yml

---

# tasks file for ansible-role-container-registry

# NOTE(mfedosin): In order to verify that we have already configured docker
# we add a line `# Configured by Ansible container registry role` in
# /etc/sysconfig/docker config file when initial configuration is done,
# and check its existence later.
- name: Check that the configuration mark exists in /etc/sysconfig/docker
  command: grep -Fq "# Configured by Ansible container registry role" /etc/sysconfig/docker
  register: is_configured
  check_mode: false
  failed_when: false
  changed_when: false

- name: configure docker registry block
  when: not container_registry_skip_reconfiguration or is_configured.rc != 0
  become: true
  block:
    # NOTE(aschultz): LP#1750194 - need to set ip_forward before docker starts
    # so lets set it before we install the package if we're managing it.
    - name: enable net.ipv4.ip_forward
      sysctl:
        name: net.ipv4.ip_forward
        value: 1
        sysctl_set: yes
        state: present
        reload: yes

    # NOTE(aschultz): LP#1765121 - need to check that we don't have any ftype=0
    # volumes because other wise docker is very unhappy
    - name: Check if there are XFS volumes with ftype=0
      shell: |
        for dev in $(df -h | grep '/dev/' | grep -v 'tmp' | cut -d' ' -f1)
        do
          parseftype=$(xfs_info $dev | grep ftype=0);
          if [[ ! -z "$parseftype" ]]; then
            ftype="ftype=0";
            break;
          fi
        done
        echo $ftype;        
      register: ftype
      changed_when: false

    - name: Check ftype
      fail:
        msg: >
          XFS volumes formatted using ftype=0 are incompatible
          with the docker overlayfs driver.          
      when:
        - not ansible_check_mode
        - ftype.stdout == 'ftype=0'

    - include_tasks: install-engine.yml

    - name: manage /etc/systemd/system/docker.service.d
      file:
        path: /etc/systemd/system/docker.service.d
        state: directory
        mode: '0755'
      when: ansible_facts['service_mgr'] == 'systemd'

    - name: unset mountflags
      ini_file:
        path: /etc/systemd/system/docker.service.d/99-unset-mountflags.conf
        section: Service
        option: MountFlags
        value: '""'
        create: yes
        mode: '0644'
      register: _cfg_flags
      when: ansible_facts['service_mgr'] == 'systemd'

    - name: configure OPTIONS in /etc/sysconfig/docker
      lineinfile:
        path: /etc/sysconfig/docker
        regexp: '^OPTIONS='
        line: "OPTIONS='{{ _full_docker_options }}'"
        create: yes
        mode: '0644'
      register: _cfg_options

    - name: configure INSECURE_REGISTRY in /etc/sysconfig/docker
      lineinfile:
        path: /etc/sysconfig/docker
        regexp: '^INSECURE_REGISTRY='
        line: "INSECURE_REGISTRY='{{ registry_flags }}'"
        mode: '0644'
      when: container_registry_insecure_registries | length > 0
      register: _cfg_insecure
      vars:
        registry_flags: --insecure-registry {{ container_registry_insecure_registries | join(' --insecure-registry ') }}

    - name: Create additional socket directories
      file:
        path: "{{ item | dirname }}"
        state: directory
        mode: '0755'
      register: _cfg_sockets
      with_items: "{{ container_registry_additional_sockets }}"
      when: container_registry_additional_sockets | length > 0

    - name: manage /etc/docker/daemon.json
      template:
        src: docker-daemon.json.j2
        dest: /etc/docker/daemon.json
        mode: '0644'
      register: _cfg_daemon

    - name: configure DOCKER_STORAGE_OPTIONS in /etc/sysconfig/docker-storage
      lineinfile:
        path: /etc/sysconfig/docker-storage
        regexp: '^DOCKER_STORAGE_OPTIONS='
        line: "DOCKER_STORAGE_OPTIONS=' {{ container_registry_storage_options }}'"
        create: yes
        mode: '0644'
      when: container_registry_storage_options | length > 0
      register: _cfg_storage

    - name: configure DOCKER_NETWORK_OPTIONS in /etc/sysconfig/docker-network
      lineinfile:
        path: /etc/sysconfig/docker-network
        regexp: '^DOCKER_NETWORK_OPTIONS='
        line: "DOCKER_NETWORK_OPTIONS=' {{ container_registry_network_options }}'"
        create: yes
        mode: '0644'
      when: container_registry_network_options | length > 0
      register: _cfg_network

    - name: ensure docker group exists
      group:
        name: docker
        state: present
      register: _cfg_group

    - name: add deployment user to docker group
      user:
        name: "{{ container_registry_deployment_user }}"
        groups: docker
        append: yes
      register: _cfg_user
      when: container_registry_deployment_user | length > 0

    - name: reset ssh connection to pick up docker group
      meta: reset_connection
      when: _cfg_group is changed or _cfg_user is changed

    - name: Handle docker restart
      when:
        - (_cfg_flags is changed
           or _cfg_options is changed
           or _cfg_insecure is changed
           or _cfg_sockets is changed
           or _cfg_daemon is changed
           or _cfg_storage is changed
           or _cfg_network is changed
           or _cfg_group is changed
           or _cfg_user is changed)
      block:
        - name: Reload systemd
          systemd:
            daemon_reload: yes
          become: true
          when:
            - ansible_facts['service_mgr'] == 'systemd'
            - _cfg_flags is changed

        - name: Reload docker
          service:
            name: docker
            enabled: true
            state: restarted
          become: true

        - name: Pause while Docker restarts
          shell: sleep 10
          changed_when: false

        - name: Wait for docker
          command: /usr/bin/docker images
          register: docker_ready
          retries: 10
          delay: 5
          until: docker_ready.rc == 0

    - name: mark docker configured
      lineinfile:
        path: /etc/sysconfig/docker
        line: "# Configured by Ansible container registry role"
        insertafter: "^# /etc/sysconfig/docker$"
        create: yes
        mode: '0644'