Merge pull request 'feat ✨: Add configuration options for log2ram and journald settings' (#30) from dev into main

Reviewed-on: #30

defaults/main.yml

@@ -31,3 +31,17 @@ proxmox_apt_languages:
   - "en"
   - "es"
   - "it"
+
+# Percentage of total RAM to allocate to log2ram
+log2ram_ram_percent: 10
+
+log2ram_min_size_mb: 128
+log2ram_max_size_mb: 1024
+
+# Journald RAM usage limit
+journald_runtime_max_use: "100M"
+
+# VM write frequency tuning
+vm_dirty_ratio: 15
+vm_dirty_background_ratio: 5
+vm_swappiness: "{{ proxmox_swapiness }}"

handlers/main.yml

@@ -20,3 +20,14 @@
     name: logrotate
     state: restarted
   become: true
+
+- name: Restart log2ram
+  ansible.builtin.systemd:
+    name: log2ram
+    state: restarted
+    enabled: yes
+
+- name: Restart journald
+  ansible.builtin.systemd:
+    name: systemd-journald
+    state: restarted

tasks/main.yml

@@ -39,3 +39,6 @@
 
 - name: Configure kernel panic auto-reboot
   ansible.builtin.import_tasks: kernel.yml
+
+- name: Configure ram usage
+  ansible.builtin.import_tasks: ram.yml

tasks/ram.yml

@@ -0,0 +1,102 @@
+---
+- name: ram | Ensure Debian family
+  ansible.builtin.assert:
+    that: ansible_os_family == "Debian"
+    fail_msg: "This role only supports Debian/Proxmox systems."
+
+- name: ram | Calculate log2ram size
+  ansible.builtin.set_fact:
+    _total_ram_mb: "{{ ansible_memtotal_mb }}"
+    _calculated_size_mb: "{{ (ansible_memtotal_mb * log2ram_ram_percent / 100) | int }}"
+    log2ram_size_mb: >-
+      {{
+        [log2ram_min_size_mb,
+         [_calculated_size_mb, log2ram_max_size_mb] | min
+        ] | max
+      }}
+
+- name: ram | Convert size to M format
+  ansible.builtin.set_fact:
+    log2ram_size: "{{ log2ram_size_mb }}M"
+
+# - name: Install log2ram
+
+- name: ram | Install dependencies
+  ansible.builtin.apt:
+    name:
+      - rsync
+      - curl
+      - ca-certificates
+    state: present
+    update_cache: yes
+    cache_valid_time: 3600  # Only run apt-get update if it hasn't run in the last hour
+
+- name: ram | Download log2ram
+  ansible.builtin.get_url:
+    url: https://github.com/azlux/log2ram/archive/refs/heads/master.tar.gz
+    dest: /tmp/log2ram.tar.gz
+    # Adding a checksum ensures we only 'change' if the file is new/updated
+    checksum: "sha256:https://github.com/azlux/log2ram/archive/refs/heads/master.tar.gz.sha256"
+    mode: '0644'
+  register: download_archive
+
+- name: ram | Logic to extract and install log2ram
+  when: download_archive.changed # noqa: no-handler
+  block:
+    - name: ram | Extract log2ram
+      ansible.builtin.unarchive:
+        src: "/tmp/log2ram.tar.gz"
+        dest: "/tmp"
+        remote_src: yes
+
+    - name: ram | Install log2ram
+      ansible.builtin.command: bash install.sh
+      args:
+        chdir: "/tmp/log2ram-master"
+        # 'creates' makes the command idempotent by checking for the binary
+        creates: /usr/local/bin/log2ram
+      notify: Restart log2ram
+
+# Configure log2ram
+
+- name: ram | Configure log2ram settings
+  ansible.builtin.lineinfile:
+    path: /etc/log2ram.conf
+    regexp: "{{ item.regexp }}"
+    line: "{{ item.line }}"
+    backup: yes
+  loop:
+    - { regexp: '^#?SIZE=', line: "SIZE={{ log2ram_size }}" }
+    - { regexp: '^#?USE_RSYNC=', line: "USE_RSYNC=true" }
+  notify: Restart log2ram
+
+# Keep journald fully in RAM
+
+- name: ram | Configure journald storage volatile
+  ansible.builtin.lineinfile:
+    path: /etc/systemd/journald.conf
+    regexp: '^#?Storage='
+    line: "Storage=volatile"
+    backup: yes
+  notify: Restart journald
+
+- name: ram | Limit journald runtime size
+  ansible.builtin.lineinfile:
+    path: /etc/systemd/journald.conf
+    regexp: '^#?RuntimeMaxUse='
+    line: "RuntimeMaxUse={{ journald_runtime_max_use }}"
+  notify: Restart journald
+
+# Enable log2ram on boot
+
+- name: ram | Configure memory tuning sysctl
+  ansible.posix.sysctl:
+    name: "{{ item.name }}"
+    value: "{{ item.value }}"
+    state: present
+    sysctl_file: /etc/sysctl.d/99-proxmox-memory.conf
+    reload: yes
+  loop:
+    - { name: 'vm.swappiness', value: "{{ vm_swappiness }}" }
+    - { name: 'vm.dirty_ratio', value: "{{ vm_dirty_ratio }}" }
+    - { name: 'vm.dirty_background_ratio', value: "{{ vm_dirty_background_ratio }}" }