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-sygnal/defaults/main.yml

@@ -0,0 +1,76 @@
+---
+# Sygnal is a reference Push Gateway for Matrix.
+# To make use of it for delivering push notificatins, you'll need to develop/build your own Matrix app.
+# Project source code URL: https://github.com/matrix-org/sygnal
+matrix_sygnal_enabled: false
+
+matrix_sygnal_base_path: "{{ matrix_base_data_path }}/sygnal"
+matrix_sygnal_config_path: "{{ matrix_sygnal_base_path }}/config"
+matrix_sygnal_data_path: "{{ matrix_sygnal_base_path }}/data"
+
+matrix_sygnal_version: v0.12.0
+matrix_sygnal_docker_image: "{{ matrix_container_global_registry_prefix }}matrixdotorg/sygnal:{{ matrix_sygnal_version }}"
+matrix_sygnal_docker_image_force_pull: "{{ matrix_sygnal_docker_image.endswith(':latest') }}"
+
+# List of systemd services that matrix-sygnal.service depends on.
+matrix_sygnal_systemd_required_services_list: ['docker.service']
+
+# List of systemd services that matrix-sygnal.service wants
+matrix_sygnal_systemd_wanted_services_list: []
+
+# Controls whether the matrix-sygnal container exposes its HTTP port (tcp/6000 in the container).
+#
+# Takes an "<ip>:<port>" or "<port>" value (e.g. "127.0.0.1:6000"), or empty string to not expose.
+matrix_sygnal_container_http_host_bind_port: ''
+
+# A list of extra arguments to pass to the container
+matrix_sygnal_container_extra_arguments: []
+
+# A map (dictionary) of apps instances that this server works with.
+#
+# Example configuration:
+#
+# matrix_sygnal_apps:
+#   com.example.myapp.ios:
+#     type: apns
+#     # .. more configuration ..
+#   com.example.myapp.android:
+#     type: gcm
+#     api_key: your_api_key_for_gcm
+#     # .. more configuration ..
+#
+# The APNS configuration needs to reference some certificate files.
+# One can put these in the `matrix_sygnal_data_path` directory (`/matrix/sygnal/data`), mounted to `/data` in the container.
+# The `matrix_sygnal_apps` paths need to use the in-container path (`/data`).
+# To install these files via the playbook, one can use the `matrix-aux` role.
+# Examples and more details are available in `docs/configuring-playbook-sygnal.md`.
+matrix_sygnal_apps: []
+
+matrix_sygnal_metrics_prometheus_enabled: false
+
+# Default Sygnal configuration template which covers the generic use case.
+# You can customize it by controlling the various variables inside it.
+#
+# For a more advanced customization, you can extend the default (see `matrix_sygnal_configuration_extension_yaml`)
+# or completely replace this variable with your own template.
+matrix_sygnal_configuration_yaml: "{{ lookup('template', 'templates/sygnal.yaml.j2') }}"
+
+matrix_sygnal_configuration_extension_yaml: |
+  # Your custom YAML configuration for Sygnal goes here.
+  # This configuration extends the default starting configuration (`matrix_sygnal_configuration_yaml`).
+  #
+  # You can override individual variables from the default configuration, or introduce new ones.
+  #
+  # If you need something more special, you can take full control by
+  # completely redefining `matrix_sygnal_configuration_yaml`.
+  #
+  # Example configuration extension follows:
+  # metrics:
+  #   opentracing:
+  #     enabled: true
+
+matrix_sygnal_configuration_extension: "{{ matrix_sygnal_configuration_extension_yaml | from_yaml if matrix_sygnal_configuration_extension_yaml | from_yaml is mapping else {} }}"
+
+# Holds the final sygnal configuration (a combination of the default and its extension).
+# You most likely don't need to touch this variable. Instead, see `matrix_sygnal_configuration_yaml`.
+matrix_sygnal_configuration: "{{ matrix_sygnal_configuration_yaml | from_yaml | combine(matrix_sygnal_configuration_extension, recursive=True) }}"

roles/custom/matrix-sygnal/tasks/init.yml

@@ -0,0 +1,5 @@
+---
+
+- ansible.builtin.set_fact:
+    matrix_systemd_services_list: "{{ matrix_systemd_services_list + ['matrix-sygnal.service'] }}"
+  when: matrix_sygnal_enabled | bool

roles/custom/matrix-sygnal/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
+  tags:
+    - setup-all
+    - setup-sygnal
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_install.yml"
+  when: run_setup | bool and matrix_sygnal_enabled | bool
+  tags:
+    - setup-all
+    - setup-sygnal
+
+- ansible.builtin.import_tasks: "{{ role_path }}/tasks/setup_uninstall.yml"
+  when: run_setup | bool and not matrix_sygnal_enabled | bool
+  tags:
+    - setup-all
+    - setup-sygnal

roles/custom/matrix-sygnal/tasks/setup_install.yml

@@ -0,0 +1,44 @@
+---
+
+- name: Ensure Sygnal image is pulled
+  community.docker.docker_image:
+    name: "{{ matrix_sygnal_docker_image }}"
+    source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+    force_source: "{{ matrix_sygnal_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_sygnal_docker_image_force_pull }}"
+  register: result
+  retries: "{{ matrix_container_retries_count }}"
+  delay: "{{ matrix_container_retries_delay }}"
+  until: result is not failed
+
+- name: Ensure Sygnal paths exists
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: directory
+    mode: 0750
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+  with_items:
+    - "{{ matrix_sygnal_base_path }}"
+    - "{{ matrix_sygnal_config_path }}"
+    - "{{ matrix_sygnal_data_path }}"
+
+- name: Ensure Sygnal config installed
+  ansible.builtin.copy:
+    content: "{{ matrix_sygnal_configuration | to_nice_yaml(indent=2, width=999999) }}"
+    dest: "{{ matrix_sygnal_config_path }}/sygnal.yaml"
+    mode: 0640
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+
+- name: Ensure matrix-sygnal.service installed
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/systemd/matrix-sygnal.service.j2"
+    dest: "{{ matrix_systemd_path }}/matrix-sygnal.service"
+    mode: 0644
+  register: matrix_sygnal_systemd_service_result
+
+- name: Ensure systemd reloaded after matrix-sygnal.service installation
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_sygnal_systemd_service_result.changed | bool"

roles/custom/matrix-sygnal/tasks/setup_uninstall.yml

@@ -0,0 +1,36 @@
+---
+
+- name: Check existence of matrix-sygnal service
+  ansible.builtin.stat:
+    path: "{{ matrix_systemd_path }}/matrix-sygnal.service"
+  register: matrix_sygnal_service_stat
+
+- name: Ensure matrix-sygnal is stopped
+  ansible.builtin.service:
+    name: matrix-sygnal
+    state: stopped
+    enabled: false
+    daemon_reload: true
+  register: stopping_result
+  when: "matrix_sygnal_service_stat.stat.exists | bool"
+
+- name: Ensure matrix-sygnal.service doesn't exist
+  ansible.builtin.file:
+    path: "{{ matrix_systemd_path }}/matrix-sygnal.service"
+    state: absent
+  when: "matrix_sygnal_service_stat.stat.exists | bool"
+
+- name: Ensure systemd reloaded after matrix-sygnal.service removal
+  ansible.builtin.service:
+    daemon_reload: true
+  when: "matrix_sygnal_service_stat.stat.exists | bool"
+
+- name: Ensure Sygnal base directory doesn't exist
+  ansible.builtin.file:
+    path: "{{ matrix_sygnal_base_path }}"
+    state: absent
+
+- name: Ensure Sygnal Docker image doesn't exist
+  community.docker.docker_image:
+    name: "{{ matrix_sygnal_docker_image }}"
+    state: absent

roles/custom/matrix-sygnal/tasks/validate_config.yml

@@ -0,0 +1,7 @@
+---
+
+- name: Fail if no Sygnal apps defined
+  ansible.builtin.fail:
+    msg: >-
+      Enabling Sygnal requires that you specify at least one app in `matrix_sygnal_apps`
+  when: "matrix_sygnal_enabled and matrix_sygnal_apps | length == 0"

roles/custom/matrix-sygnal/templates/sygnal.yaml.j2

@@ -0,0 +1,237 @@
+##
+# This is a configuration for Sygnal, the reference Push Gateway for Matrix
+# See: matrix.org
+##
+
+## Logging #
+#
+log:
+  # Specify a Python logging 'dictConfig', as described at:
+  #   https://docs.python.org/3.7/library/logging.config.html#logging.config.dictConfig
+  #
+  setup:
+    version: 1
+    formatters:
+      normal:
+        format: "%(asctime)s [%(process)d] %(levelname)-5s %(name)s %(message)s"
+    handlers:
+      # This handler prints to Standard Error
+      #
+      stderr:
+        class: "logging.StreamHandler"
+        formatter: "normal"
+        stream: "ext://sys.stderr"
+
+      # This handler prints to Standard Output.
+      #
+      stdout:
+        class: "logging.StreamHandler"
+        formatter: "normal"
+        stream: "ext://sys.stdout"
+
+      # This handler demonstrates logging to a text file on the filesystem.
+      # You can use logrotate(8) to perform log rotation.
+      #
+      #file:
+      #  class: "logging.handlers.WatchedFileHandler"
+      #  formatter: "normal"
+      #  filename: "./sygnal.log"
+    loggers:
+      # sygnal.access contains the access logging lines.
+      # Comment out this section if you don't want to give access logging
+      # any special treatment.
+      #
+      sygnal.access:
+        propagate: false
+        handlers: ["stdout"]
+        level: "INFO"
+
+      # sygnal contains log lines from Sygnal itself.
+      # You can comment out this section to fall back to the root logger.
+      #
+      sygnal:
+        propagate: false
+        handlers: ["stderr"]
+
+    root:
+      # Specify the handler(s) to send log messages to.
+      handlers: ["stderr"]
+      level: "INFO"
+
+    disable_existing_loggers: false
+
+
+  access:
+    # Specify whether or not to trust the IP address in the `X-Forwarded-For`
+    # header. In general, you want to enable this if and only if you are using a
+    # reverse proxy which is configured to emit it.
+    #
+    x_forwarded_for: true
+
+## HTTP Server (Matrix Push Gateway API) #
+#
+http:
+  # Specify a list of interface addresses to bind to.
+  #
+  # This example listens on the IPv4 loopback device:
+  #bind_addresses: ['127.0.0.1']
+  # This example listens on all IPv4 interfaces:
+  #bind_addresses: ['0.0.0.0']
+  # This example listens on all IPv4 and IPv6 interfaces:
+  #bind_addresses: ['0.0.0.0', '::']
+  bind_addresses: ['::']
+
+  # Specify the port number to listen on.
+  #
+  port: 6000
+
+## Proxying for outgoing connections #
+#
+# Specify the URL of a proxy to use for outgoing traffic
+# (e.g. to Apple & Google) if desired.
+# Currently only HTTP proxies with CONNECT capability are supported.
+#
+# If you do not specify a value, the `HTTPS_PROXY` environment variable will
+# be used if present. Otherwise, no proxy will be used.
+#
+# Default is unspecified.
+#
+#proxy: 'http://user:secret@prox:8080'
+
+## Metrics #
+#
+metrics:
+  ## Prometheus #
+  #
+  prometheus:
+    # Specify whether or not to enable Prometheus.
+    #
+    enabled: false
+
+    # Specify an address for the Prometheus HTTP Server to listen on.
+    #
+    address: '0.0.0.0'
+
+    # Specify a port for the Prometheus HTTP Server to listen on.
+    #
+    port: 8000
+
+  ## OpenTracing #
+  #
+  opentracing:
+    # Specify whether or not to enable OpenTracing.
+    #
+    enabled: false
+
+    # Specify an implementation of OpenTracing to use. Currently only 'jaeger'
+    # is supported.
+    #
+    implementation: jaeger
+
+    # Specify the service name to be reported to the tracer.
+    #
+    service_name: sygnal
+
+    # Specify configuration values to pass to jaeger_client.
+    #
+    jaeger:
+      sampler:
+        type: 'const'
+        param: 1
+#        local_agent:
+#          reporting_host: '127.0.0.1'
+#          reporting_port:
+      logging: true
+
+  ## Sentry #
+  #
+  sentry:
+    # Specify whether or not to enable Sentry.
+    #
+    enabled: false
+
+    # Specify your Sentry DSN if you enable Sentry
+    #
+    #dsn: "https://<key>@sentry.example.org/<project>"
+
+## Pushkins/Apps #
+#
+# Add a section for every push application here.
+# Specify the pushkey for the application and also the type.
+# For the type, you may specify a fully-qualified Python classname if desired.
+#
+#apps:
+  # This is an example APNs push configuration
+  #
+  #com.example.myapp.ios:
+  #  type: apns
+  #
+  #  # Authentication
+  #  #
+  #  # Two methods of authentication to APNs are currently supported.
+  #  #
+  #  # You can authenticate using a key:
+  #  keyfile: my_key.p8
+  #  key_id: MY_KEY_ID
+  #  team_id: MY_TEAM_ID
+  #  topic: MY_TOPIC
+  #
+  #  # Or, a certificate can be used instead:
+  #  certfile: com.example.myApp_prod_APNS.pem
+  #
+  #  # This is the maximum number of in-flight requests *for this pushkin*
+  #  # before additional notifications will be failed.
+  #  # (This is a robustness measure to prevent one pushkin stacking up with
+  #  #  queued requests and saturating the inbound connection queue of a load
+  #  #  balancer or reverse proxy).
+  #  # Defaults to 512 if unset.
+  #  #
+  #  #inflight_request_limit: 512
+  #
+  #  # Specifies whether to use the production or sandbox APNs server. Note that
+  #  # sandbox tokens should only be used with the sandbox server and vice versa.
+  #  #
+  #  # Valid options are:
+  #  #   * production
+  #  #   * sandbox
+  #  #
+  #  # The default is 'production'. Uncomment to use the sandbox instance.
+  #  #platform: sandbox
+
+  # This is an example GCM/FCM push configuration.
+  #
+  #com.example.myapp.android:
+  #  type: gcm
+  #  api_key: your_api_key_for_gcm
+  #
+  #  # This is the maximum number of connections to GCM servers at any one time
+  #  # the default is 20.
+  #  #max_connections: 20
+  #
+  #  # This is the maximum number of in-flight requests *for this pushkin*
+  #  # before additional notifications will be failed.
+  #  # (This is a robustness measure to prevent one pushkin stacking up with
+  #  #  queued requests and saturating the inbound connection queue of a load
+  #  #  balancer or reverse proxy).
+  #  # Defaults to 512 if unset.
+  #  #
+  #  #inflight_request_limit: 512
+  #
+  #  # This allows you to specify additional options to send to Firebase.
+  #  #
+  #  # Of particular interest, admins who wish to support iOS apps using Firebase
+  #  # probably wish to set content_available, and may need to set mutable_content.
+  #  # (content_available allows your iOS app to be woken up by data messages,
+  #  # and mutable_content allows your notification to be modified by a
+  #  # Notification Service app extension).
+  #  #
+  #  # See https://firebase.google.com/docs/cloud-messaging/http-server-ref
+  #  # for the exhaustive list of valid options.
+  #  #
+  #  # Do not specify `data`, `priority`, `to` or `registration_ids` as they may
+  #  # be overwritten or lead to an invalid request.
+  #  #
+  #  #fcm_options:
+  #  #  content_available: true
+  #  #  mutable_content: true
+apps: {{ matrix_sygnal_apps|to_json }}

roles/custom/matrix-sygnal/templates/systemd/matrix-sygnal.service.j2

@@ -0,0 +1,42 @@
+#jinja2: lstrip_blocks: "True"
+[Unit]
+Description=Matrix Sygnal
+{% for service in matrix_sygnal_systemd_required_services_list %}
+Requires={{ service }}
+After={{ service }}
+{% endfor %}
+{% for service in matrix_sygnal_systemd_wanted_services_list %}
+Wants={{ service }}
+{% endfor %}
+DefaultDependencies=no
+
+[Service]
+Type=simple
+Environment="HOME={{ matrix_systemd_unit_home_path }}"
+ExecStartPre=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} kill matrix-sygnal 2>/dev/null || true'
+ExecStartPre=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} rm matrix-sygnal 2>/dev/null || true'
+
+ExecStart={{ matrix_host_command_docker }} run --rm --name matrix-sygnal \
+			--log-driver=none \
+			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
+			--cap-drop=ALL \
+			--env=SYGNAL_CONF=/config/sygnal.yaml \
+			--network={{ matrix_docker_network }} \
+			{% if matrix_sygnal_container_http_host_bind_port %}
+			-p {{ matrix_sygnal_container_http_host_bind_port }}:6000 \
+			{% endif %}
+			--mount type=bind,src={{ matrix_sygnal_config_path }},dst=/config \
+			--mount type=bind,src={{ matrix_sygnal_data_path }},dst=/data \
+			{% for arg in matrix_sygnal_container_extra_arguments %}
+			{{ arg }} \
+			{% endfor %}
+			{{ matrix_sygnal_docker_image }}
+
+ExecStop=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} kill matrix-sygnal 2>/dev/null || true'
+ExecStop=-{{ matrix_host_command_sh }} -c '{{ matrix_host_command_docker }} rm matrix-sygnal 2>/dev/null || true'
+Restart=always
+RestartSec=30
+SyslogIdentifier=matrix-sygnal
+
+[Install]
+WantedBy=multi-user.target