Initial version of the caddy rule

Signed-off-by: Nis Wechselberg <enbewe@enbewe.de>

CHANGELOG.md

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+# Changelog
+
+## 1.0.0
+
+* Initial Release

README.md

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+# Ansible Collection - enbewe.caddy
+
+Collecion for a multi-site reverse proxy, based on caddy (https://caddyserver.com/).
+
+## Playbooks
+### enbewe.caddy.deploy
+Deploys the role `enbewe.caddy.caddy` to the host group called `caddy`.
+
+## Roles
+### enbewe.caddy.caddy
+Installs the caddy server in a podman container and configures the server to act 
+as a reverse proxy to all configured sites.
+
+#### Required variables
+**caddy_networks** *(Type: list / elements=string)*
+The list of podman networks the proxy should be part of.
+
+**caddy_sites** *(Type: dict)
+The sites that caddy should serve. 
+Each site has to have a `name`, that is used as the host in caddy config.
+Additionally, the site should have the key `proxy_to`, that points to the address of the proxied service,
+or it should have the key `directives` that can be used to create a free-form config for the site.
+
+#### Optional variables
+**caddy_use_local_certs** *(Default: false)*
+Enforce usage of local certificates, instead of the default Letsencrypt certs.

galaxy.yml

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+---
+### REQUIRED
+# The namespace of the collection. This can be a company/brand/organization or product namespace under which all
+# content lives. May only contain alphanumeric lowercase characters and underscores. Namespaces cannot start with
+# underscores or numbers and cannot contain consecutive underscores
+namespace: 'enbewe'
+
+# The name of the collection. Has the same character restrictions as 'namespace'
+name: 'caddy'
+
+# The version of the collection. Must be compatible with semantic versioning
+version: '1.0.0'
+
+# The path to the Markdown (.md) readme file. This path is relative to the root of the collection
+readme: 'README.md'
+
+# A list of the collection's content authors. Can be just the name or in the format 'Full Name <email> (url)
+# @nicks:irc/im.site#channel'
+authors:
+  - 'Nis Wechselberg <enbewe+ansible@enbewe.de>'
+
+
+### OPTIONAL but strongly recommended
+# A short summary description of the collection
+description: 'Caddy based reverse proxy'
+
+# Either a single license or a list of licenses for content inside of a collection. Ansible Galaxy currently only
+# accepts L(SPDX,https://spdx.org/licenses/) licenses. This key is mutually exclusive with 'license_file'
+license:
+  - 'MIT'
+
+# A list of tags you want to associate with the collection for indexing/searching. A tag name has the same character
+# requirements as 'namespace' and 'name'
+tags:
+  - 'linux'
+
+# Collections that this collection requires to be installed for it to be usable. The key of the dict is the
+# collection label 'namespace.name'. The value is a version range
+# L(specifiers,https://python-semanticversion.readthedocs.io/en/latest/#requirement-specification). Multiple version
+# range specifiers can be set and are separated by ','
+dependencies:
+  containers.podman: '>=1.13.0'
+
+# The URL of the originating SCM repository
+repository: 'https://git.enbewe.de/Coding/ansible-collection-caddy'
+
+# The URL to any online docs
+# documentation: http://docs.example.com
+
+# The URL to the homepage of the collection/project
+# homepage: http://example.com
+
+# The URL to the collection issue tracker
+# issues: http://example.com/issue/tracker
+
+# A list of file glob-like patterns used to filter any files or directories that should not be included in the build
+# artifact. A pattern is matched from the relative path of the file or directory of the collection directory. This
+# uses 'fnmatch' to match the files or directories. Some directories and files like 'galaxy.yml', '*.pyc', '*.retry',
+# and '.git' are always filtered. Mutually exclusive with 'manifest'
+# build_ignore: []
+
+# A dict controlling use of manifest directives used in building the collection artifact. The key 'directives' is a
+# list of MANIFEST.in style
+# L(directives,https://packaging.python.org/en/latest/guides/using-manifest-in/#manifest-in-commands). The key
+# 'omit_default_directives' is a boolean that controls whether the default directives are used. Mutually exclusive
+# with 'build_ignore'
+# manifest: null

meta/runtime.yml

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+---
+# Collections must specify a minimum required ansible version to upload
+# to galaxy
+requires_ansible: '>=2.17.0'
+
+# Content that Ansible needs to load from another location or that has
+# been deprecated/removed
+# plugin_routing:
+#   action:
+#     redirected_plugin_name:
+#       redirect: ns.col.new_location
+#     deprecated_plugin_name:
+#       deprecation:
+#         removal_version: "4.0.0"
+#         warning_text: |
+#           See the porting guide on how to update your playbook to
+#           use ns.col.another_plugin instead.
+#     removed_plugin_name:
+#       tombstone:
+#         removal_version: "2.0.0"
+#         warning_text: |
+#           See the porting guide on how to update your playbook to
+#           use ns.col.another_plugin instead.
+#   become:
+#   cache:
+#   callback:
+#   cliconf:
+#   connection:
+#   doc_fragments:
+#   filter:
+#   httpapi:
+#   inventory:
+#   lookup:
+#   module_utils:
+#   modules:
+#   netconf:
+#   shell:
+#   strategy:
+#   terminal:
+#   test:
+#   vars:
+
+# Python import statements that Ansible needs to load from another location
+# import_redirection:
+#   ansible_collections.ns.col.plugins.module_utils.old_location:
+#     redirect: ansible_collections.ns.col.plugins.module_utils.new_location
+
+# Groups of actions/modules that take a common set of options
+# action_groups:
+#   group_name:
+#     - module1
+#     - module2

playbooks/deploy.yml

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+---
+- name: 'Deploy reverse proxy to host group'
+  hosts: 'caddy'
+  roles:
+    - 'enbewe.caddy.caddy'

plugins/README.md

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+# Collections Plugins Directory
+
+This directory can be used to ship various plugins inside an Ansible collection. Each plugin is placed in a folder that
+is named after the type of plugin it is in. It can also include the `module_utils` and `modules` directory that
+would contain module utils and modules respectively.
+
+Here is an example directory of the majority of plugins currently supported by Ansible:
+
+```
+└── plugins
+    ├── action
+    ├── become
+    ├── cache
+    ├── callback
+    ├── cliconf
+    ├── connection
+    ├── filter
+    ├── httpapi
+    ├── inventory
+    ├── lookup
+    ├── module_utils
+    ├── modules
+    ├── netconf
+    ├── shell
+    ├── strategy
+    ├── terminal
+    ├── test
+    └── vars
+```
+
+A full list of plugin types can be found at [Working With Plugins](https://docs.ansible.com/ansible-core/2.17/plugins/plugins.html).

roles/caddy/defaults/main.yml

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+---
+caddy_use_local_certs: false

roles/caddy/handlers/main.yml

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+---
+- name: 'Reload caddy services'
+  become: true
+  ansible.builtin.service:
+    daemon-reload: true
+
+- name: 'Restart caddy image'
+  become: true
+  ansible.builtin.service:
+    name: 'caddy-image.service'
+    state: 'restarted'
+
+- name: 'Restart caddy volume'
+  become: true
+  ansible.builtin.service:
+    name: 'caddy-data-volume.service'
+    state: 'restarted'
+
+- name: 'Restart caddy container'
+  become: true
+  ansible.builtin.service:
+    name: 'caddy.service'
+    state: 'restarted'

roles/caddy/tasks/main.yml

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+---
+- name: 'Ensure required software is installed'
+  become: true
+  ansible.builtin.apt:
+    name: 'podman'
+    state: 'present'
+
+- name: 'Define caddy image'
+  become: true
+  containers.podman.podman_image:
+    name: 'docker.io/library/caddy:latest'
+    state: 'quadlet'
+  notify:
+    - 'Reload caddy services'
+    - 'Restart caddy image'
+
+- name: 'Define caddy data volume'
+  become: true
+  containers.podman.podman_volume:
+    name: 'caddy-data'
+    state: 'quadlet'
+  notify:
+    - 'Reload caddy services'
+    - 'Restart caddy volume'
+
+- name: 'Create caddy conf directory'
+  become: true
+  ansible.builtin.file:
+    name: '/etc/caddy'
+    state: 'directory'
+    owner: 'root'
+    group: 'root'
+    mode: 'u=rwx,g=rx,o=rx'
+
+- name: 'Generate Caddyfile'
+  become: true
+  ansible.builtin.template:
+    src: 'Caddyfile.j2'
+    dest: '/etc/caddy/Caddyfile'
+    owner: 'root'
+    group: 'root'
+    mode: 'u=rw,g=r,o=r'
+  notify: 
+      - 'Restart caddy container'
+
+- name: 'Create caddy container'
+  become: true
+  containers.podman.podman_container:
+    name: 'caddy'
+    image: 'caddy.image'
+    network: '{{ caddy_networks }}'
+    state: 'quadlet'
+    volume: 
+      - '/etc/caddy:/etc/caddy'
+      - 'caddy-data.volume:/data'
+    publish:
+      - '80:80'
+      - '443:443'
+    quadlet_options: |
+      [Install]
+      WantedBy=default.target
+      [Unit]
+      Requires=caddy-image.service
+      After=caddy-image.service
+      Requires=caddy-data-volume.service
+      After=caddy-data-volume.service
+      {% for net in caddy_networks %}
+      Requires={{ net | replace('.network', '-network') }}.service
+      After={{ net | replace('.network', '-network') }}.service
+      {% endfor %}
+  notify:
+    - 'Reload caddy services'
+    - 'Restart caddy container'
+
+

roles/caddy/templates/Caddyfile.j2

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+{% if caddy_use_local_certs %}
+{
+	local_certs
+}
+{% endif %}
+
+{% for site in caddy_sites %}
+{{ site.name }} {
+{% if site.directives is defined %}
+	{{ site.directives }}
+{% endif %}
+{% if site.proxy_to is defined %}
+	reverse_proxy {{ site.proxy_to }}
+{% endif %}
+}
+
+{% endfor %}