# 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: Ensuring docker and support packages are present
  become: yes
  package:
    name:
      - docker.io
      - runc
    update_cache: yes
    state: present

- name: Ensure docker group exists
  group:
    name: docker
    state: present

- name: Add user "{{ ansible_user }}" to docker group
  become: yes
  user:
    name: "{{ ansible_user }}"
    groups:
    - docker
    append: yes

- name: Reset ssh connection to add docker group to user
  meta: reset_connection
  ignore_errors: true

- block:
    - name: Create docker service directory
      file:
        path: /etc/systemd/system/docker.service.d/
        state: directory
        mode: '0755'

    - name: Configure proxy for docker service if enabled
      template:
        src: http-proxy-conf.j2
        dest: /etc/systemd/system/docker.service.d/http-proxy.conf
  when: proxy.enabled|bool == true
  become: yes

- name: Create docker config directory
  file:
    path: "{{ docker_config_path }}"
    state: directory
    mode: '0755'
  become: yes

- name: Debug zuul site mirror var
  debug:
    msg:
      - "zuul_site_mirror_fqdn: {{ zuul_site_mirror_fqdn | default('NONE') }}"
  ignore_errors: yes

- name: Set docker_config variable
  set_fact:
    docker_config_file: "{{ docker_config_path }}/daemon.json"

- name: Check if docker config file exists
  stat:
    path: "{{ docker_config_file }}"
  register: res

# Avoid long if/then/else blocks here below, pretend that config exists
- name: Create empty docker config if it doesn't exist
  copy:
    content: "{}"
    dest: "{{ docker_config_file }}"
  when: not res.stat.exists
  become: yes

- name: Get current docker configuration
  command: "cat {{ docker_config_file }}"
  register: res

- name: Get current docker configuration as json
  set_fact:
    default_docker_conf: "{{ res.stdout | from_json }}"

- name: Debug current docker configuration
  debug:
    var: default_docker_conf

- name: Merge default and custom configuration
  set_fact:
    merged_docker_config: "{{ default_docker_conf | combine(docker_config) }}"

- name: Debug merged docker configuration
  debug:
    var: merged_docker_config

- name: Add container images mirror configuration
  set_fact:
    merged_docker_config: "{{ merged_docker_config | combine({ 'registry-mirrors': [ 'http://' + zuul_site_mirror_fqdn + ':8082' ] })}}"
  when: zuul_site_mirror_fqdn is defined

- name: Debug merged docker configuration
  debug:
    var: merged_docker_config

- name: Save merged docker daemon configuration
  copy:
    content: "{{ merged_docker_config | to_nice_json }}"
    dest: "{{ docker_config_file }}"
  become: yes

- name: Start docker
  become: yes
  systemd:
    name: docker
    state: restarted
    daemon_reload: yes
    enabled: true

- name: Change group ownership on docker socket
  become: yes
  file:
    path: /var/run/docker.sock
    group: docker