---
# Copyright 2019 Red Hat, Inc.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.


- name: Docker vfs setup
  hosts: all
  gather_facts: true
  handlers:
    - name: Stop docker daemon
      become: true
      systemd:
        name: docker
        state: stopped
      listen: Restart docker

    - name: Start docker daemon
      become: true
      systemd:
        name: docker
        state: started
      listen: Restart docker

    - name: Cleanup temp json file
      become: true
      file:
        path: "{{ tripleo_docker_temp_file }}"
        state: absent
  pre_tasks:
    - name: Set temp file fact
      set_fact:
        tripleo_docker_temp_file: "{{ ansible_user_dir }}/.ansible/tmp/docker-daemon-{{ inventory_hostname }}.json"
      when:
        - tripleo_docker_temp_file is undefined
  tasks:
    - name: Storage driver block
      become: true
      when:
        - (tripleo_docker_enable_vfs | default(false)) | bool
      block:
        - name: Create ansible temp directory
          file:
            path: "{{ tripleo_docker_temp_file | dirname }}"
            state: directory

        - name: Check for docker json file
          stat:
            path: /etc/docker/daemon.json
          register: daemon_json

        - name: Store config file
          fetch:
            src: /etc/docker/daemon.json
            dest: "{{ tripleo_docker_temp_file }}"
            flat: true
          register: stored_file
          when:
            - daemon_json.stat.exists | bool
          notify:
            - Cleanup temp json file

        - name: Insert storage-driver into docker daemon config (existing)
          include_role:
            name: tripleo_config
          vars:
            tripleo_config_src: "{{ tripleo_docker_temp_file }}"
            tripleo_config_type: json
            tripleo_config_dest: /etc/docker/daemon.json
            tripleo_config_overrides:
              storage-driver: vfs
          when:
            - daemon_json.stat.exists | bool

        - name: Insert storage-driver into docker daemon config (new)
          include_role:
            name: tripleo_config
          vars:
            tripleo_config_type: json
            tripleo_config_dest: /etc/docker/daemon.json
            tripleo_config_overrides:
              storage-driver: vfs
          when:
            - not (daemon_json.stat.exists | bool)
  post_tasks:
    - name: Get checksum from running docker config
      stat:
        path: /etc/docker/daemon.json
      register: running_file

    - name: Notify config changes
      debug:
        msg: "Configuration changes detected notifying handlers"
      changed_when: true
      when:
        - (not (stored_file.changed | bool)) or
          (stored_file.checksum != running_file.stat.checksum)
      notify:
        - Restart docker