Prototype System Container Ansible

install_systemcontainer.yaml

# Copyright (C) 2016-2017  Red Hat, Inc
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
---

# Apply to all hosts; a custom inventory is provided for each play.
- hosts: all
  name: Install System Container
  serial: 1
  gather_facts: no
  tasks:
    - name: Ensure the atomic command is available
      shell: "which atomic"
      register: atomic_bin
      ignore_errors: True

    - assert:
        that: atomic_bin.rc == 0
        msg: "The atomic command is required for System Containers"

    - set_fact:
        container_suffix: 0
        # The following would be passed into the playbook
        container_name: mine
        image_name: fedora
        image_tag: latest

    # Check to see if a 0 or 1 container is there so we can set variables accordingly
    - name: Check if a 0 container is present
      command: "systemctl cat {{ container_name }}-0"
      register: container_0_present
      ignore_errors: True

    - name: Check if a 1 container is present
      command: "systemctl cat {{ container_name }}-1"
      register: container_1_present
      ignore_errors: True

    - set_fact:
        container_suffix: 0
        old_container: "{{ container_name }}-1"
      when:
      - container_0_present.rc != 0
      - container_1_present.rc == 0

    - set_fact:
        container_suffix: 1
        old_container: "{{ container_name }}-0"
      when:
      - container_0_present.rc == 0
      - container_1_present.rc != 0

    # Create the full name for easier usage
    - set_fact:
        container_full_name: "{{ container_name }}-{{ container_suffix }}"

    - name: Install the System Container
      command: "atomic install --name {{ container_full_name }} --system {{ image_name }}:{{ image_tag }}"
      register: container_install
      ignore_errors: True

    - assert:
        that: container_install.rc == 0
        msg: "The container failed to install: stdout={{ container_install.stdout }},stderr={{ container_install.stderr }}"

    - name: Check container service
      command: "systemctl status {{ container_full_name }}"
      register: container_status
      ignore_errors: True

    - name: Ensure the container is running
      assert:
        that: container_status.rc == 0
        msg: "The container did not start: stdout={{ container_status.stdout }},stderr={{ container_status.stderr }}"

    - name: Uninstall the old container
      command: atomic uninstall {{ old_container }}
      when: old_container is defined