Initial import as galaxy role

Signed-off-by: Knut Ahlers <knut@ahlers.me>

README.md

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+# luzifer-ansible / docker-compose
+
+This role installs latest docker-compose on a host and start it as a systemd daemon (it does not take care about installing Docker itself so this needs to be done before by some other role or external functionality.)
+
+## Requirements
+
+- Debian >= 8 (jessie)
+- Ubuntu >= 16.04 (xenial)
+- Docker
+
+## Usage
+
+See the [Ansible Galaxy Intro](https://galaxy.ansible.com/intro) for usage of roles within Ansible Galaxy.

defaults/main.yml

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+---
+
+reload_minutes: 15
+
+config:
+  version: "3"
+  services:

meta/main.yml

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+---
+galaxy_info:
+  author: Knut Ahlers
+  description: |
+    Install latest docker-compose on a host and start it as a systemd
+    daemon (it does not take care about installing Docker itself so 
+    this needs to be done before by some other role or external
+    functionality.)
+
+  license: Apache
+  min_ansible_version: 2.3
+
+  platforms:
+  - name: Ubuntu
+    versions:
+      - xenial
+  - name: Debian
+    versions:
+      - jessie
+      - stretch
+
+  categories:
+    #- cloud
+    #- cloud:ec2
+    #- cloud:gce
+    #- cloud:rax
+    #- clustering
+    #- database
+    #- database:nosql
+    #- database:sql
+    #- development
+    #- monitoring
+    #- networking
+    #- packaging
+    - system
+    #- web
+
+dependencies: []
+  # List your role dependencies here, one per line.
+  # Be sure to remove the '[]' above if you add dependencies
+  # to this list.

tasks/main.yml

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+---
+
+# Install docker-compose
+
+- name: Ensure pip to be available
+  apt:
+    name: python-pip
+    update_cache: yes
+
+- name: Install or update docker-compose
+  pip:
+    name: docker-compose
+    state: latest
+  register: docker_compose
+
+# Configure docker-compose
+
+- name: Create configuration directory
+  file:
+    dest: /etc/docker-compose
+    state: directory
+    mode: 0700
+
+- name: Write docker-compose.yml
+  template:
+    dest: /etc/docker-compose/docker-compose.yml
+    src: templates/docker-compose.yml
+    mode: 0600
+  register: compose_file
+
+- name: Validate configuration
+  command: docker-compose config -q
+  args:
+    chdir: /etc/docker-compose
+  when: compose_file.changed
+
+# Install and start services
+
+- name: Install docker-compose.service
+  copy:
+    dest: /etc/systemd/system/docker-compose.service
+    content: |
+      [Unit]
+      Description=Docker Compose container starter
+      After=docker.service network-online.target
+      Requires=docker.service network-online.target
+
+      [Service]
+      WorkingDirectory=/etc/docker-compose
+      Type=oneshot
+      RemainAfterExit=yes
+
+      ExecStartPre=/usr/local/bin/docker-compose pull --quiet --parallel --ignore-pull-failures
+      ExecStart=/usr/local/bin/docker-compose up -d
+
+      ExecStop=/usr/local/bin/docker-compose down
+
+      ExecReload=/usr/local/bin/docker-compose pull --quiet --parallel --ignore-pull-failures
+      ExecReload=/usr/local/bin/docker-compose up -d
+
+      [Install]
+      WantedBy=multi-user.target
+  register: docker_compose_service
+
+- name: Start and enable docker-compose service
+  systemd:
+    name: docker-compose.service
+    daemon_reload: yes
+    enabled: yes
+    state: started
+
+- name: Restart service if service configuration changed
+  systemd:
+    name: docker-compose.service
+    daemon_reload: yes
+    state: restarted
+  when: docker_compose_service.changed
+
+- name: Reload and apply configuration
+  systemd:
+    name: docker-compose.service
+    state: reloaded
+  when: docker_compose.changed or compose_file.changed
+
+- name: Install docker-compose-reload.service
+  copy:
+    dest: /etc/systemd/system/docker-compose-reload.service
+    content: |
+      [Unit]
+      Description=Refresh images and update containers
+
+      [Service]
+      Type=oneshot
+
+      ExecStart=/bin/systemctl reload docker-compose.service
+
+- name: Install docker-compose-reload.timer
+  copy:
+    dest: /etc/systemd/system/docker-compose-reload.timer
+    content: |
+      [Unit]
+      Description=Refresh images and update containers
+      Requires=docker-compose.service
+      After=docker-compose.service
+
+      [Timer]
+      OnCalendar=*:0/{{ reload_minutes }}
+
+      [Install]
+      WantedBy=timers.target
+  register: docker_compose_reload_timer
+
+- name: Enable and start docker-compose-reload.timer
+  systemd:
+    name: docker-compose-reload.timer
+    daemon_reload: yes
+    enabled: yes
+    state: started
+
+- name: Restart docker-compose-reload.timer if it changed
+  systemd:
+    name: docker-compose-reload.timer
+    daemon_reload: yes
+    state: restarted
+  when: docker_compose_reload_timer.changed

templates/docker-compose.yml

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+# {{ ansible_managed }}
+
+{{ config | to_nice_yaml }}