Add (native) Traefik support to synapse-admin

Previously, it had to go through matrix-nginx-proxy.
It's exposed to Traefik directly via container labels now.

group_vars/matrix_servers

@@ -3159,13 +3159,18 @@ matrix_synapse_reverse_proxy_companion_access_log_syslog_integration_server_port
 
 matrix_synapse_admin_enabled: false
 
-# Normally, matrix-nginx-proxy is enabled and nginx can reach Synapse Admin over the container network.
-# If matrix-nginx-proxy is not enabled, or you otherwise have a need for it, you can expose
-# Synapse Admin's HTTP port to the local host.
+matrix_synapse_admin_nginx_proxy_integration_enabled: "{{ matrix_playbook_reverse_proxy_type in ['playbook-managed-nginx', 'other-nginx-non-container'] }}"
+
 matrix_synapse_admin_container_http_host_bind_port: "{{ (matrix_playbook_service_host_bind_interface_prefix ~ ':8766') if matrix_playbook_service_host_bind_interface_prefix else '' }}"
 
 matrix_synapse_admin_container_image_self_build: "{{ matrix_architecture not in ['arm64', 'amd64'] }}"
 
+matrix_synapse_admin_container_additional_networks: "{{ [matrix_playbook_reverse_proxyable_services_additional_network] if matrix_playbook_reverse_proxyable_services_additional_network else [] }}"
+
+matrix_synapse_admin_container_labels_traefik_enabled: "{{ matrix_playbook_reverse_proxy_type in ['playbook-managed-traefik', 'other-traefik-container'] }}"
+matrix_synapse_admin_container_labels_traefik_docker_network: "{{ matrix_playbook_reverse_proxyable_services_additional_network }}"
+matrix_synapse_admin_container_labels_traefik_entrypoints: "{{ devture_traefik_entrypoint_primary if devture_traefik_enabled else '' }}"
+
 ######################################################################
 #
 # /matrix-synapse-admin

roles/custom/matrix-synapse-admin/defaults/main.yml

@@ -4,19 +4,57 @@
 
 matrix_synapse_admin_enabled: true
 
+# A path on host where all related files will be saved
+matrix_synapse_admin_base_path: "{{ matrix_base_data_path }}/synapse-admin"
+matrix_synapse_admin_docker_src_files_path: "{{ matrix_synapse_admin_base_path }}/docker-src"
+
+# Specifies whether this role will integrate with the matrix-nginx-proxy role
+matrix_synapse_admin_nginx_proxy_integration_enabled: false
+
 matrix_synapse_admin_container_image_self_build: false
 matrix_synapse_admin_container_image_self_build_repo: "https://github.com/Awesome-Technologies/synapse-admin.git"
 
-matrix_synapse_admin_docker_src_files_path: "{{ matrix_base_data_path }}/synapse-admin/docker-src"
-
 matrix_synapse_admin_version: 0.8.7
 matrix_synapse_admin_docker_image: "{{ matrix_synapse_admin_docker_image_name_prefix }}awesometechnologies/synapse-admin:{{ matrix_synapse_admin_version }}"
 matrix_synapse_admin_docker_image_name_prefix: "{{ 'localhost/' if matrix_synapse_admin_container_image_self_build else matrix_container_global_registry_prefix }}"
 matrix_synapse_admin_docker_image_force_pull: "{{ matrix_synapse_admin_docker_image.endswith(':latest') }}"
 
+# The base container network
+matrix_synapse_admin_container_network: matrix-synapse-admin
+
+# A list of additional container networks that the container would be connected to.
+# The role does not create these networks, so make sure they already exist.
+#
+# Use this to expose this container to another reverse proxy, which runs in a different container network,
+# without exposing all other container services to that other reverse-proxy.
+matrix_synapse_admin_container_additional_networks: []
+
 # A list of extra arguments to pass to the container
 matrix_synapse_admin_container_extra_arguments: []
 
+# matrix_synapse_admin_container_labels_traefik_enabled controls whether labels to assist a Traefik reverse-proxy will be attached to the container.
+# See `../templates/labels.j2` for details.
+#
+# To inject your own other container labels, see `matrix_synapse_admin_container_labels_additional_labels`.
+matrix_synapse_admin_container_labels_traefik_enabled: true
+matrix_synapse_admin_container_labels_traefik_docker_network: "{{ matrix_synapse_admin_container_network }}"
+matrix_synapse_admin_container_labels_traefik_hostname: "{{ matrix_server_fqn_matrix }}"
+# The path prefix must not end with a slash
+matrix_synapse_admin_container_labels_traefik_path_prefix: /synapse-admin
+matrix_synapse_admin_container_labels_traefik_rule: "Host(`{{ matrix_synapse_admin_container_labels_traefik_hostname }}`) && PathPrefix(`{{ matrix_synapse_admin_container_labels_traefik_path_prefix | quote }}`)"
+matrix_synapse_admin_container_labels_traefik_entrypoints: web-secure
+matrix_synapse_admin_container_labels_traefik_tls: "{{ matrix_synapse_admin_container_labels_traefik_entrypoints != 'web' }}"
+matrix_synapse_admin_container_labels_traefik_tls_certResolver: default  # noqa var-naming
+
+# matrix_synapse_admin_container_labels_additional_labels contains a multiline string with additional labels to add to the container label file.
+# See `../templates/labels.j2` for details.
+#
+# Example:
+# matrix_synapse_admin_container_labels_additional_labels: |
+#   my.label=1
+#   another.label="here"
+matrix_synapse_admin_container_labels_additional_labels: ''
+
 # List of systemd services that matrix-synapse-admin.service depends on
 matrix_synapse_admin_systemd_required_services_list: ['docker.service']
 

roles/custom/matrix-synapse-admin/tasks/main.yml

@@ -1,7 +1,7 @@
 ---
 
 - block:
-    - when: matrix_synapse_admin_enabled | bool
+    - when: matrix_synapse_admin_enabled | bool and matrix_synapse_admin_nginx_proxy_integration_enabled | bool
       ansible.builtin.include_tasks: "{{ role_path }}/tasks/inject_into_nginx_proxy.yml"
   tags:
     - setup-all

roles/custom/matrix-synapse-admin/tasks/setup_install.yml

@@ -1,5 +1,21 @@
 ---
 
+- name: Ensure matrix-synapse-admin path exist
+  ansible.builtin.file:
+    path: "{{ matrix_synapse_admin_base_path }}"
+    state: directory
+    mode: 0700
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+
+- name: Ensure matrix-synapse-admin labels file is created
+  ansible.builtin.template:
+    src: "{{ role_path }}/templates/labels.j2"
+    dest: "{{ matrix_synapse_admin_base_path }}/labels"
+    owner: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
+    mode: 0640
+
 - name: Ensure matrix-synapse-admin image is pulled
   community.docker.docker_image:
     name: "{{ matrix_synapse_admin_docker_image }}"
@@ -35,9 +51,13 @@
       pull: true
   when: matrix_synapse_admin_container_image_self_build | bool
 
+- name: Ensure matrix-synapse-admin container network is created
+  community.general.docker_network:
+    name: "{{ matrix_synapse_admin_container_network }}"
+    driver: bridge
+
 - name: Ensure matrix-synapse-admin.service installed
   ansible.builtin.template:
     src: "{{ role_path }}/templates/systemd/matrix-synapse-admin.service.j2"
     dest: "{{ devture_systemd_docker_base_systemd_path }}/matrix-synapse-admin.service"
     mode: 0644
-  register: matrix_synapse_admin_systemd_service_result

roles/custom/matrix-synapse-admin/tasks/setup_uninstall.yml

@@ -18,3 +18,8 @@
       ansible.builtin.file:
         path: "{{ devture_systemd_docker_base_systemd_path }}/matrix-synapse-admin.service"
         state: absent
+
+    - name: Ensure matrix-synapse-admin directory doesn't exist
+      ansible.builtin.file:
+        path: "{{ matrix_synapse_admin_base_path }}"
+        state: absent

roles/custom/matrix-synapse-admin/tasks/validate_config.yml

@@ -10,3 +10,24 @@
     - {'old': 'matrix_synapse_admin_docker_repo', 'new': 'matrix_synapse_admin_container_self_build_repo'}
     - {'old': 'matrix_synapse_admin_container_self_build', 'new': 'matrix_synapse_admin_container_image_self_build'}
     - {'old': 'matrix_synapse_admin_container_self_build_repo', 'new': 'matrix_synapse_admin_container_image_self_build_repo'}
+
+- when: matrix_synapse_admin_container_labels_traefik_enabled | bool
+  block:
+    - name: Fail if required matrix-synapse-admin Traefik settings not defined
+      ansible.builtin.fail:
+        msg: >-
+          You need to define a required configuration setting (`{{ item }}`).
+      when: "vars[item] == ''"
+      with_items:
+        - matrix_synapse_admin_container_labels_traefik_hostname
+        - matrix_synapse_admin_container_labels_traefik_path_prefix
+
+    # We ensure it doesn't end with a slash, because we handle both (slash and no-slash).
+    # Knowing that `matrix_synapse_admin_container_labels_traefik_path_prefix` does not end with a slash
+    # ensures we know how to set these routes up without having to do "does it end with a slash" checks elsewhere.
+    - name: Fail if matrix_synapse_admin_container_labels_traefik_path_prefix ends with a slash
+      ansible.builtin.fail:
+        msg: >-
+          matrix_synapse_admin_container_labels_traefik_path_prefix (`{{ matrix_synapse_admin_container_labels_traefik_path_prefix }}`) must not end with a slash.
+          Example: `/synapse-admin`.
+      when: "matrix_synapse_admin_container_labels_traefik_path_prefix[-1] == '/'"

roles/custom/matrix-synapse-admin/templates/labels.j2

@@ -0,0 +1,25 @@
+{% if matrix_synapse_admin_container_labels_traefik_enabled %}
+traefik.enable=true
+
+{% if matrix_synapse_admin_container_labels_traefik_docker_network %}
+traefik.docker.network={{ matrix_synapse_admin_container_labels_traefik_docker_network }}
+{% endif %}
+
+traefik.http.middlewares.matrix-synapse-admin-slashless-redirect.redirectregex.regex=({{ matrix_synapse_admin_container_labels_traefik_path_prefix | quote }})$
+traefik.http.middlewares.matrix-synapse-admin-slashless-redirect.redirectregex.replacement=${1}/
+
+traefik.http.middlewares.matrix-synapse-admin-replacepath.replacepath.path=/
+
+traefik.http.routers.matrix-synapse-admin.rule={{ matrix_synapse_admin_container_labels_traefik_rule }}
+traefik.http.routers.matrix-synapse-admin.middlewares=matrix-synapse-admin-slashless-redirect,matrix-synapse-admin-replacepath
+traefik.http.routers.matrix-synapse-admin.service=matrix-synapse-admin
+traefik.http.routers.matrix-synapse-admin.entrypoints={{ matrix_synapse_admin_container_labels_traefik_entrypoints }}
+traefik.http.routers.matrix-synapse-admin.tls={{ matrix_synapse_admin_container_labels_traefik_tls | to_json }}
+{% if matrix_synapse_admin_container_labels_traefik_tls %}
+traefik.http.routers.matrix-synapse-admin.tls.certResolver={{ matrix_synapse_admin_container_labels_traefik_tls_certResolver }}
+{% endif %}
+
+traefik.http.services.matrix-synapse-admin.loadbalancer.server.port=80
+{% endif %}
+
+{{ matrix_synapse_admin_container_labels_additional_labels }}

roles/custom/matrix-synapse-admin/templates/systemd/matrix-synapse-admin.service.j2

@@ -16,24 +16,34 @@ Environment="HOME={{ devture_systemd_docker_base_systemd_unit_home_path }}"
 ExecStartPre=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} kill matrix-synapse-admin 2>/dev/null || true'
 ExecStartPre=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} rm matrix-synapse-admin 2>/dev/null || true'
 
-ExecStart={{ devture_systemd_docker_base_host_command_docker }} run --rm --name matrix-synapse-admin \
+ExecStartPre={{ devture_systemd_docker_base_host_command_docker }} create \
+			--rm \
+			--name=matrix-synapse-admin \
 			--log-driver=none \
 			--cap-drop=ALL \
 			--cap-add=CHOWN \
 			--cap-add=NET_BIND_SERVICE \
 			--cap-add=SETUID \
 			--cap-add=SETGID \
-			--network={{ matrix_docker_network }} \
+			--network={{ matrix_synapse_admin_container_network }} \
 			{% if matrix_synapse_admin_container_http_host_bind_port %}
 			-p {{ matrix_synapse_admin_container_http_host_bind_port }}:80 \
 			{% endif %}
+			--label-file={{ matrix_synapse_admin_base_path }}/labels \
 			{% for arg in matrix_synapse_admin_container_extra_arguments %}
 			{{ arg }} \
 			{% endfor %}
 			{{ matrix_synapse_admin_docker_image }}
 
+{% for network in matrix_synapse_admin_container_additional_networks %}
+ExecStartPre={{ devture_systemd_docker_base_host_command_docker }} network connect {{ network }} matrix-synapse-admin
+{% endfor %}
+
+ExecStart={{ devture_systemd_docker_base_host_command_docker }} start --attach matrix-synapse-admin
+
 ExecStop=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} kill matrix-synapse-admin 2>/dev/null || true'
 ExecStop=-{{ devture_systemd_docker_base_host_command_sh }} -c '{{ devture_systemd_docker_base_host_command_docker }} rm matrix-synapse-admin 2>/dev/null || true'
+
 Restart=always
 RestartSec=30
 SyslogIdentifier=matrix-synapse-admin