Move roles/matrix* to roles/custom/matrix*

This paves the way for installing other roles into `roles/galaxy` using `ansible-galaxy`,
similar to how it's done in:

- https://github.com/spantaleev/gitea-docker-ansible-deploy
- https://github.com/spantaleev/nextcloud-docker-ansible-deploy

In the near future, we'll be removing a lot of the shared role code from here
and using upstream roles for it. Some of the core `matrix-*` roles have
already been extracted out into other reusable roles:

- https://github.com/devture/com.devture.ansible.role.postgres
- https://github.com/devture/com.devture.ansible.role.systemd_docker_base
- https://github.com/devture/com.devture.ansible.role.timesync
- https://github.com/devture/com.devture.ansible.role.vars_preserver
- https://github.com/devture/com.devture.ansible.role.playbook_runtime_messages
- https://github.com/devture/com.devture.ansible.role.playbook_help

We just need to migrate to those.

roles/custom/matrix-dynamic-dns/tasks/init.yml

@@ -0,0 +1,11 @@
+---
+# See https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1070
+# and https://github.com/spantaleev/matrix-docker-ansible-deploy/commit/1ab507349c752042d26def3e95884f6df8886b74#commitcomment-51108407
+- name: Fail if trying to self-build on Ansible < 2.8
+  ansible.builtin.fail:
+    msg: "To self-build the Dynamic DNS image, you should use Ansible 2.8 or higher. See docs/ansible.md"
+  when: "ansible_version.major == 2 and ansible_version.minor < 8 and matrix_dynamic_dns_container_image_self_build and matrix_dynamic_dns_enabled"
+
+- ansible.builtin.set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-dynamic-dns.service'] }}"
+  when: "matrix_dynamic_dns_enabled | bool"

roles/custom/matrix-dynamic-dns/tasks/install.yml

@@ -0,0 +1,69 @@
+---
+
+- name: Ensure Dynamic DNS image is pulled
+  community.docker.docker_image:
+    name: "{{ matrix_dynamic_dns_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_dynamic_dns_docker_image_force_pull if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
+    force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_dynamic_dns_docker_image_force_pull }}"
+  when: matrix_dynamic_dns_enabled | bool and not matrix_dynamic_dns_container_image_self_build
+  register: result
+  retries: "{{ matrix_container_retries_count }}"
+  delay: "{{ matrix_container_retries_delay }}"
+  until: result is not failed
+
+- name: Ensure Dynamic DNS paths exist
+  ansible.builtin.file:
+    path: "{{ item.path }}"
+    state: directory
+    mode: 0751
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - {path: "{{ matrix_dynamic_dns_base_path }}", when: true}
+    - {path: "{{ matrix_dynamic_dns_config_path }}", when: true}
+    - {path: "{{ matrix_dynamic_dns_docker_src_files_path }}", when: "{{ matrix_dynamic_dns_container_image_self_build }}"}
+  when: matrix_dynamic_dns_enabled | bool and item.when | bool
+
+- name: Ensure Dynamic DNS repository is present on self build
+  ansible.builtin.git:
+    repo: "{{ matrix_dynamic_dns_container_image_self_build_repo }}"
+    version: "{{ matrix_dynamic_dns_container_image_self_build_repo_branch }}"
+    dest: "{{ matrix_dynamic_dns_docker_src_files_path }}"
+    force: "yes"
+  become: true
+  become_user: "{{ matrix_user_username }}"
+  register: matrix_dynamic_dns_git_pull_results
+  when: "matrix_dynamic_dns_enabled | bool and matrix_dynamic_dns_container_image_self_build | bool"
+
+- name: Ensure Dynamic DNS Docker image is built
+  community.docker.docker_image:
+    name: "{{ matrix_dynamic_dns_docker_image }}"
+    source: build
+    force_source: "{{ matrix_dynamic_dns_git_pull_results.changed if ansible_version.major > 2 or ansible_version.minor >= 8 else omit }}"
+    force: "{{ omit if ansible_version.major > 2 or ansible_version.minor >= 8 else matrix_dynamic_dns_git_pull_results.changed }}"
+    build:
+      dockerfile: Dockerfile
+      path: "{{ matrix_dynamic_dns_docker_src_files_path }}"
+      pull: true
+  when: "matrix_dynamic_dns_enabled | bool and matrix_dynamic_dns_container_image_self_build | bool"
+
+- name: Ensure Dynamic DNS ddclient.conf installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/ddclient.conf.j2"
+    dest: "{{ matrix_dynamic_dns_config_path }}/ddclient.conf"
+    mode: 0644
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+
+- name: Ensure matrix-dynamic-dns.service installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/systemd/matrix-dynamic-dns.service.j2"
+    dest: "/etc/systemd/system/matrix-dynamic-dns.service"
+    mode: 0644
+  register: matrix_dynamic_dns_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-dynamic-dns.service installation
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_dynamic_dns_systemd_service_result.changed"

roles/custom/matrix-dynamic-dns/tasks/main.yml

@@ -0,0 +1,23 @@
+---
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/init.yml"
+  tags:
+    - always
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/validate_config.yml"
+  when: "run_setup | bool and matrix_dynamic_dns_enabled | bool"
+  tags:
+    - setup-all
+    - setup-dynamic-dns
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/install.yml"
+  when: "run_setup | bool and matrix_dynamic_dns_enabled | bool"
+  tags:
+    - setup-all
+    - setup-dynamic-dns
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/uninstall.yml"
+  when: "run_setup | bool and not matrix_dynamic_dns_enabled | bool"
+  tags:
+    - setup-all
+    - setup-dynamic-dns

roles/custom/matrix-dynamic-dns/tasks/uninstall.yml

@@ -0,0 +1,28 @@
+---
+
+- name: Check existence of matrix-dynamic-dns service
+  ansible.builtin.stat:
+    path: "{{ matrix_systemd_path }}/matrix-dynamic-dns.service"
+  register: matrix_dynamic_dns_service_stat
+
+- name: Ensure matrix-dynamic-dns is stopped
+  ansible.builtin.service:
+    name: matrix-dynamic-dns
+    state: stopped
+    enabled: false
+    daemon_reload: true
+  when: "matrix_dynamic_dns_service_stat.stat.exists"
+
+- name: Ensure matrix-dynamic-dns.service doesn't exist
+  ansible.builtin.file:
+    path: "{{ matrix_systemd_path }}/matrix-dynamic-dns.service"
+    state: absent
+  when: "matrix_dynamic_dns_service_stat.stat.exists"
+
+- name: Ensure systemd reloaded after matrix-dynamic-dns.service removal
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_dynamic_dns_service_stat.stat.exists"
+
+# Intentionally not removing the Docker image when uninstalling.
+# We can't be sure it had been pulled by us in the first place.

roles/custom/matrix-dynamic-dns/tasks/validate_config.yml

@@ -0,0 +1,16 @@
+---
+
+- name: Fail if no configurations specified
+  ansible.builtin.fail:
+    msg: >-
+      You need to define at least one configuration in `matrix_dynamic_dns_domain_configurations` for using matrix-dynamic-dns.
+  when: "matrix_dynamic_dns_domain_configurations | length == 0"
+
+- name: Fail if required settings not defined in configuration blocks
+  ansible.builtin.fail:
+    msg: >-
+      One of the configurations in matrix_dynamic_dns_domain_configurations is missing a required key (domain, provider, protocol).
+  when: "'domain' not in configuration or 'provider' not in configuration or 'protocol' not in configuration"
+  with_items: "{{ matrix_dynamic_dns_domain_configurations }}"
+  loop_control:
+    loop_var: configuration