#!/usr/bin/env ansible-playbook
---
# Configure Raspberry Pi to log to RAM, with occasional SD card sync
# to reduce SD card writes
# Usage: ansible-playbook -e 'log2ram_size=80M' install_log2ram.yml

- hosts: all
  gather_facts: true
  gather_subset: min
  become: true


  vars:
    apt_keyring_file: azlux.fr.log2ram.gpg
    apt_sources_file: log2ram.list

    log2ram_size: 40M
    log2ram_path_disk: /var/log
    log2ram_use_z2lr: true
    log2ram_comp_alg: lz4
    log2ram_log_disk_size: 100M


  tasks:
    - name: "Add /etc/apt/sources.list.d/{{ apt_sources_file }}"
      copy:
        content: "deb http://packages.azlux.fr/debian/ {{ ansible_facts['distribution_release'] }} main\n"
        dest: /etc/apt/sources.list.d/{{ apt_sources_file }}
        mode: 0644
        owner: root
      register: source_list

    - name: Import apt key
      apt_key:
        url: https://azlux.fr/repo.gpg.key
        id: 98B824A5FA7D3A10FDB225B7CA548A0A0312D8E6
        keyring: /etc/apt/trusted.gpg.d/{{ apt_keyring_file }}
      register: dl_key

    - name: Remove tilde backup file {{ apt_keyring_file }}~
      file:
        path: /etc/apt/trusted.gpg.d/{{ apt_keyring_file }}~
        state: absent

    - name: update apt cache
      apt:
        update_cache: true
      when: dl_key is changed or source_list is changed

    - name: Install log2ram
      apt:
        pkg:
          - log2ram
      register: pkg
      notify: Restart log2ram

    - name: Set config options
      lineinfile:
        path: /etc/log2ram.conf
        regexp: "{{ item.regexp }}"
        line: "{{ item.line }}"
        backrefs: true
      loop:
        - {regexp: '^SIZE=(.*)$', line: 'SIZE={{ log2ram_size }}'}
        - {regexp: '^PATH_DISK=(.*)$', line: 'PATH_DISK="{{ log2ram_path_disk }}"'}
        - {regexp: '^ZL2R=(.*)$', line: 'ZL2R={{ log2ram_use_z2lr|lower }}'}
        - {regexp: '^COMP_ALG=(.*)$', line: 'COMP_ALG={{ log2ram_comp_alg }}'}
        - {regexp: '^LOG_DISK_SIZE=(.*)$', line: 'LOG_DISK_SIZE={{ log2ram_log_disk_size }}'}
      notify: Restart log2ram


  handlers:
    - name: Restart log2ram
      systemd:
        name: log2ram
        state: restarted