baikal: add server config

roles/baikal-web/meta/main.yml

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+---
+dependencies:
+  - role: caddy

roles/baikal-web/tasks/main.yml

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+---
+- name: Ensure Caddyfile is present
+  template:
+    src: 'baikal.Caddyfile.j2'
+    dest: '/etc/caddy/baikal.Caddyfile'
+    owner: root
+    group: root
+    mode: '0644'
+  notify: caddy-reload

roles/baikal-web/templates/baikal.Caddyfile.j2

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+dav.roosens.me {
+    reverse_proxy {{ hostvars[groups['baikal'][0]].static_ip }}:8005
+}

roles/baikal/files/baikal.backup.sh

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+#!/usr/bin/env bash
+
+data_dir='/mnt/data1/baikal'
+snapshot_dir="${data_dir}.snapshot"
+
+# Read-only snapshot for atomic backup
+btrfs subvolume snapshot -r "$data_dir" "$snapshot_dir" || exit $?
+
+/usr/local/bin/restic backup "$snapshot_dir"
+
+# Always remove snapshot subvolume, even if restic fails
+btrfs subvolume delete "$snapshot_dir"

roles/baikal/files/compose.yml

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+version: '3'
+
+services:
+  app:
+    image: 'ckulka/baikal:0.9.4-nginx'
+    restart: always
+    ports:
+      - '8005:80'
+    volumes:
+      - '/mnt/data1/baikal/config:/var/www/baikal/config'
+      - '/mnt/data1/baikal/Specific:/var/www/baikal/Specific'

roles/baikal/tasks/main.yml

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+---
+- name: Ensure data directory is present
+  ansible.builtin.file:
+    path: '/mnt/data1/baikal'
+    state: directory
+    mode: '0755'
+    owner: 'root'
+    group: 'root'
+
+- name: Ensure data subvolumes are present
+  community.general.btrfs_subvolume:
+    name: '/baikal/{{ item }}'
+  loop:
+    - 'Specific'
+    - 'config'
+
+- name: Ensure configuration directory is present
+  ansible.builtin.file:
+    path: '/etc/baikal'
+    state: directory
+    mode: '0755'
+
+- name: Ensure compose file is present
+  ansible.builtin.copy:
+    src: 'compose.yml'
+    dest: '/etc/baikal/compose.yml'
+    mode: '0644'
+    owner: 'root'
+    group: 'root'
+  register: res
+
+- name: Ensure stack is deployed
+  ansible.builtin.shell:
+    chdir: '/etc/baikal'
+    cmd: 'docker compose up -d --remove-orphans'
+  when: 'res.changed'
+
+- name: Ensure backup script is present
+  ansible.builtin.copy:
+    src: 'baikal.backup.sh'
+    dest: '/etc/backups/baikal.backup.sh'
+    owner: 'root'
+    group: 'root'
+    mode: '0644'