lilik_playbook/roles/lxc_guest/tasks/main.yaml

---
- name: check for lxc container dir
  stat:
    path: '/var/lib/lxc/{{ vm_name }}'
  register: lxc_existance

- name: check for lxc container existance
  container_exists:
    name: "{{ vm_name }}"
  register: container_exists

- name: Check debian release
  assert:
    that: distro in [ 'stretch', 'sid', 'buster' ]
    msg: "release {{ distro }} not supported by debian template"

- block:
    - name: create the lxc container
      lxc_container:
          name: "{{ vm_name }}"
          backing_store: lvm
          fs_size: "{{ vm_size }}"
          vg_name: "{{ inventory_hostname }}vg"
          lv_name: "vm_{{ vm_name }}"
          fs_type: xfs
          container_log: true
          template: debian
          template_options: --release {{ distro }} --packages=ssh,python
          state: stopped
      # suppress messages related to file descriptors
      # leaking when lvm is invoked
      environment:
        LVM_SUPPRESS_FD_WARNINGS: 1
        MIRROR: http://mi.mirror.garr.it/mirrors/debian/

    - name: deploy container config
      template:
        src: config.j2
        dest: "/var/lib/lxc/{{ vm_name }}/config"

    - name: start container
      lxc_container:
          name: "{{ vm_name }}"
          state: started
      when: auto_start|bool
  when: not (container_exists.exists and lxc_existance.stat.isdir)

- name: update container config
  template:
    src: config.j2
    dest: "/var/lib/lxc/{{ vm_name }}/config"
  register: container_config
  notify: restart container

- name: set container running state
  lxc_container:
      name: "{{ vm_name }}"
      state: "{{ container_state }}"
  register: container_running_state

- name: Read container DNS configuration
  container_file_read:
    name: "{{ vm_name }}"
    path: /etc/resolv.conf
  register: vm_resolv_conf

- debug:
    var: vm_resolv_conf
    verbosity: 2

- name: update container DNS configuration
  shell: lxc-attach -n {{ vm_name }} --clear-env -e -- bash -c "grep -Pz1 'domain lilik.it\nnameserver {{ hostvars | ip_from_inventory('vm_gateway') }}' /etc/resolv.conf || echo -e 'domain lilik.it\nnameserver {{ hostvars | ip_from_inventory('vm_gateway') }}' > /etc/resolv.conf"
  register: container_dns_configuration
  changed_when: container_dns_configuration.stdout != "domain lilik.it\nnameserver {{ hostvars | ip_from_inventory('vm_gateway') }}\n\u0000"

- name: update container network configuration
  shell: lxc-attach -n {{ vm_name }} --clear-env -e -- bash -c "grep -F 'iface eth0 inet manual' /etc/network/interfaces || sed -i 's/iface eth0 inet dhcp/iface eth0 inet manual/' /etc/network/interfaces"
  register: container_network
  changed_when: "container_network.stdout != 'iface eth0 inet manual'"
  notify: restart container

- name: install packages
  shell: lxc-attach -n {{ vm_name }} --clear-env -e -- bash -c "apt-get update && apt-get install python ssh -y"
  register: install_packages
  changed_when: "install_packages.stdout.find('0 newly installed') == -1"
  notify: restart container

  # Restart container when one in
  # - container_dns_configuration
  # - network conf has changed
  # - install_packages
  # - container_network
  # is changed by executing handlers now
- meta: flush_handlers

- name: add monitoring facts
  set_fact:
    monitoring_host: "{{monitoring_host| default([]) }} + [ '{{ vm_name }}' ]"
  delegate_facts: True
  delegate_to: status