feat ✨: Add configuration options for log2ram and journald settings

This commit introduces new features that allow users to configure log2ram and journald settings. It includes handlers for log2ram, journald, and a task to configure RAM usage. Additionally, a new role is added for installing and configuring log2ram on Debian systems.

tasks/ram.yml

@@ -0,0 +1,103 @@
+---
+- 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 | Extract log2ram
+  ansible.builtin.unarchive:
+    src: "/tmp/log2ram.tar.gz"
+    dest: "/tmp"
+    remote_src: yes
+  when: download_archive.changed
+
+- 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
+  when: download_archive.changed
+  notify: Restart log2ram
+
+# Configure log2ram
+
+- name: ram | Configure log2ram size
+  ansible.builtin.lineinfile:
+    path: /etc/log2ram.conf
+    regexp: '^#?SIZE='
+    line: "SIZE={{ log2ram_size }}"
+    backup: yes
+  notify: Restart log2ram
+
+- name: ram | Enable rsync sync
+  ansible.builtin.lineinfile:
+    path: /etc/log2ram.conf
+    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.builtin.copy:
+    dest: /etc/sysctl.d/99-proxmox-memory.conf
+    content: |
+      vm.swappiness = {{ vm_swappiness }}
+      vm.dirty_ratio = {{ vm_dirty_ratio }}
+      vm.dirty_background_ratio = {{ vm_dirty_background_ratio }}
+    mode: '0644'
+  notify: Reload sysctl