feat(caddy): add ansible role

roles/caddy/README.md

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+# `finallycoffee.base.caddy` ansible role
+
+Deploy a (pre-)configure [caddy v2](https://caddyserver.com) web
+server / proxy using ansible.
+
+## Configuration
+
+To change the default configuration of reading all files from
+`/etc/caddy/sites.d/` (see `caddy_dynamic_config_dir`), specify
+your desired configuration in `caddy_config`.

roles/caddy/defaults/main/config.yml

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+---
+caddy_config: |+2
+  {
+        auto_https disable_redirects
+  }
+
+  (proxyheaders) {
+      header_up X-Forwarded-Ssl on
+      header_up Host {host}
+      header_up X-Real-IP {remote}
+      header_up X-Forwarded-For {remote}
+      # header_up X-Forwarded-Port {port}
+      header_up X-Forwarded-Proto {scheme}
+      header_up X-Url-Scheme {scheme}
+      header_up X-Forwarded-Host {host}
+  }
+  
+  # Import all configurations
+  import {{ caddy_dynamic_configs_dir }}/*/Caddyfile
+  
+  :80 {
+      redir /  https://{host}{uri} 301
+  }

roles/caddy/defaults/main/container.yml

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+---
+caddy_container_image_registry: "docker.io"
+caddy_container_image_namespace: "library"
+caddy_container_image_repository: "caddy"
+caddy_container_image_name: >-2
+  {{ [
+    caddy_container_image_registry | default([], true),
+    caddy_container_image_namespace | default([], true),
+    caddy_container_image_repository
+  ] | flatten | join('/') }}
+
+caddy_container_image_tag: ~
+caddy_container_image: >-2
+  {{ [
+    caddy_container_image_name,
+    caddy_container_image_tag | default(caddy_version, true)
+  ] | join(':') }}
+caddy_container_image_source: "pull"
+caddy_container_image_force_source: >-2
+  {{ caddy_container_image_tag | ansible.builtin.type_debug != 'NoneType' }}
+caddy_container_image_state: "{{ caddy_state }}"
+
+caddy_container_name: "caddy"
+caddy_container_env: ~
+caddy_container_ports: ~
+caddy_container_user: ~
+caddy_container_labels: ~
+caddy_container_volumes: ~
+caddy_container_config_dir: "/etc/caddy"
+caddy_container_default_volumes:
+  - "{{ caddy_config_dir }}:{{ caddy_container_config_dir }}:ro"
+  - "{{ caddy_dynamic_configs_dir }}:{{ caddy_dynamic_configs_dir }}:ro"
+  - "{{ caddy_config_internal_dir }}:/config:rw"
+  - "{{ caddy_state_dir }}:/data:rw"
+caddy_container_all_volumes: >-2
+  {{ caddy_container_default_volumes | default([], true)
+  + caddy_container_volumes | default([], true) }}
+caddy_container_state: >-2
+  {{ (caddy_state == 'present') | ternary('started', 'absent') }}
+caddy_container_restart_policy: "on-failure"
+caddy_container_networks: ~
+caddy_container_network_mode: ~
+caddy_container_etc_hosts: ~

roles/caddy/defaults/main/main.yml

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+---
+caddy_user: "caddy"
+caddy_version: "2.10.2"
+caddy_config_file: "/etc/caddy/Caddyfile"
+caddy_config_dir: "{{ caddy_config_file | ansible.builtin.dirname }}"
+caddy_config_internal_dir: "{{ caddy_config_dir }}/config"
+caddy_dynamic_configs_dir: "{{ caddy_config_dir }}/sites.d"
+caddy_state_dir: "/var/lib/caddy"
+
+caddy_state: "present"
+caddy_deployment_method: "docker"

roles/caddy/defaults/main/user.yml

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+---
+caddy_user_state: "{{ caddy_state }}"
+caddy_user_system: true
+caddy_user_create_home: false
+
+caddy_run_uid: "{{ caddy_user_info.uid | default(caddy_user) }}"
+caddy_run_gid: "{{ caddy_user_info.group | default(caddy_user) }}"

roles/caddy/meta/main.yml

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+---
+allow_duplicates: true
+dependencies: []
+galaxy_info:
+  role_name: caddy
+  description: Deploy caddy, a webserver
+  galaxy_tags:
+    - caddy
+    - zerossl
+    - http
+    - webserver
+    - docker
+    - podman

roles/caddy/tasks/deploy-docker.yml

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+---
+- name: Ensure container image '{{ caddy_container_image }}' is {{ caddy_container_image_state }}
+  community.docker.docker_image:
+    name: "{{ caddy_container_image }}"
+    state: "{{ caddy_container_image_state }}"
+    source: "{{ caddy_container_image_source }}"
+    force_source: "{{ caddy_container_image_force_source }}"
+  register: caddy_container_image_info
+  until: caddy_container_image_info is success
+  retries: 10
+  delay: 3
+
+- name: Ensure container '{{ caddy_container_name }}' is {{ caddy_container_state }}
+  community.docker.docker_container:
+    name: "{{ caddy_container_name }}"
+    image: "{{ caddy_container_image }}"
+    state: "{{ caddy_container_state }}"
+    env: "{{ caddy_container_env | default(omit, true) }}"
+    user: "{{ caddy_container_user | default(omit, true) }}"
+    ports: "{{ caddy_container_ports | default(omit, true) }}"
+    labels: "{{ caddy_container_labels | default(omit, true) }}"
+    volumes: "{{ caddy_container_all_volumes }}"
+    networks: "{{ caddy_container_networks | default(omit, true) }}"
+    etc_hosts: "{{ caddy_container_etc_hosts | default(omit, true) }}"
+    network_mode: "{{ caddy_container_network_mode | default(omit, true) }}"
+    restart_policy: "{{ caddy_container_restart_policy }}"

roles/caddy/tasks/main.yml

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+---
+- name: Ensure state '{{ caddy_state }}' is valid
+  ansible.builtin.fail:
+    msg: >-2
+      Unsupported caddy_state '{{ caddy_state }}'.
+      Supported states are {{ caddy_states | join(', ') }}.
+  when: caddy_state not in caddy_states
+
+- name: Ensure deployment method '{{ caddy_deployment_method }}' is valid
+  ansible.builtin.fail:
+    msg: >-2
+      Unsupported caddy_deployment_method '{{ caddy_deployment_method }}'.
+      Supported deployment methods are {{ caddy_deployment_methods | join(', ') }}.
+  when: caddy_deployment_method not in caddy_deployment_methods
+
+- name: Ensure caddy user '{{ caddy_user }}' is {{ caddy_user_state }}
+  ansible.builtin.user:
+    name: "{{ caddy_user }}"
+    state: "{{ caddy_user_state }}"
+    system: "{{ caddy_user_system }}"
+    create_home: "{{ caddy_user_create_home }}"
+  register: "caddy_user_info"
+
+- name: Ensure base directories are present
+  ansible.builtin.file:
+    path: "{{ dir.name }}"
+    state: "directory"
+    owner: "{{ dir.owner | default(caddy_run_uid) }}"
+    group: "{{ dir.group | default(caddy_run_uid) }}"
+    mode: "{{ dir.mode | default('0750') }}"
+  when: caddy_state == 'present'
+  loop:
+    - name: "{{ caddy_config_dir }}"
+    - name: "{{ caddy_dynamic_configs_dir }}"
+    - name: "{{ caddy_config_internal_dir }}"
+    - name: "{{ caddy_state_dir }}"
+  loop_control:
+    loop_var: "dir"
+    label: "{{ dir.name }}"
+
+- name: Ensure caddy configuration is up to date
+  ansible.builtin.copy:
+    dest: "{{ caddy_config_file }}"
+    content: "{{ caddy_config }}"
+    owner: "{{ caddy_run_uid }}"
+    group: "{{ caddy_run_gid }}"
+    mode: "0640"
+  when: caddy_state == 'present'
+
+- name: Ensure caddy is deployed using {{ caddy_deployment_method }}
+  ansible.builtin.include_tasks:
+    file: "deploy-{{ caddy_deployment_method }}.yml"

roles/caddy/vars/main.yml

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+---
+caddy_states:
+  - "present"
+  - "absent"
+caddy_deployment_methods:
+  - "docker"