#!/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:
    log2ram_repo_url: http://packages.azlux.fr
    log2ram_gpg: https://azlux.fr/repo.gpg
    log2ram_keyring: /usr/share/keyrings/azlux-archive-keyring.gpg
    log2ram_apt_repository: "deb [signed-by={{ log2ram_keyring }}] {{ log2ram_repo_url }}/{{ ansible_distribution | lower }} {{ ansible_distribution_release }} main"

    log2ram_size: 40M
    log2ram_use_rsync: true
    log2ram_mail: true
    log2ram_path_disk: /var/log
    log2ram_use_z2lr: true
    log2ram_comp_alg: lz4
    log2ram_log_disk_size: 100M


  tasks:
    - name: Add rsync as pre-requisite
      apt:
        name: rsync
      when: log2ram_use_rsync

    - name: Add gpg key
      shell: 
        cmd: >
          curl -fsSL {{ log2ram_gpg }} | gpg --dearmor --yes -o {{ log2ram_keyring }}
        creates: "{{ log2ram_keyring }}"
        
    - name: Add apt repository
      apt_repository:
        repo: "{{ log2ram_apt_repository }}"
        filename: log2ram
      register: log2ram_apt_repo

    - name: Update apt cache
      apt:
        update_cache: true
      when: log2ram_apt_repo is changed

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

    - name: Set config options
      lineinfile:
        path: /etc/log2ram.conf
        regexp: "{{ item.regexp }}"
        line: "{{ item.line }}"
        backrefs: true
      loop:
        - {regexp: '^SIZE=(.*)$', line: 'SIZE={{ log2ram_size }}'}
        - {regexp: 'USE_RSYNC=(.*)$', line: 'USE_RSYNC={{ log2ram_use_rsync }}'}
        - {regexp: '^MAIL=(.*)$', line: 'MAIL={{ log2ram_mail }}'}
        - {regexp: '^PATH_DISK=(.*)$', 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