Add a role to install 'ntfy' push-notification server.

This commit adds a 'matrix-ntfy' role that runs Ntfy server in Docker with
simple configuration, and plumbing to add the role to the playbook.

TODO: documentation, self-check, database persistence.

roles/matrix-nginx-proxy/defaults/main.yml

@@ -192,6 +192,10 @@ matrix_nginx_proxy_proxy_grafana_hostname: "{{ matrix_server_fqn_grafana }}"
 matrix_nginx_proxy_proxy_sygnal_enabled: false
 matrix_nginx_proxy_proxy_sygnal_hostname: "{{ matrix_server_fqn_sygnal }}"
 
+# Controls whether proxying the ntfy domain should be done.
+matrix_nginx_proxy_proxy_ntfy_enabled: false
+matrix_nginx_proxy_proxy_ntfy_hostname: "{{ matrix_server_fqn_ntfy }}"
+
 # Controls whether proxying for (Prometheus) metrics (`/metrics/*`) for the various services should be done (on the matrix domain)
 # If the internal Prometheus server (`matrix-prometheus` role) is used, proxying is not necessary, since Prometheus can access each container directly.
 # This is only useful when an external Prometheus will be collecting metrics.
@@ -365,6 +369,9 @@ matrix_nginx_proxy_proxy_grafana_additional_server_configuration_blocks: []
 # A list of strings containing additional configuration blocks to add to Sygnal's server configuration (matrix-sygnal.conf).
 matrix_nginx_proxy_proxy_sygnal_additional_server_configuration_blocks: []
 
+# A list of strings containing additional configuration blocks to add to ntfy's server configuration (matrix-ntfy.conf).
+matrix_nginx_proxy_proxy_ntfy_additional_server_configuration_blocks: []
+
 # A list of strings containing additional configuration blocks to add to the base domain server configuration (matrix-base-domain.conf).
 matrix_nginx_proxy_proxy_domain_additional_server_configuration_blocks: []
 

roles/matrix-nginx-proxy/tasks/setup_nginx_proxy.yml

@@ -138,6 +138,13 @@
     mode: 0644
   when: matrix_nginx_proxy_proxy_sygnal_enabled|bool
 
+- name: Ensure Matrix nginx-proxy configuration for ntfy domain exists
+  template:
+    src: "{{ role_path }}/templates/nginx/conf.d/matrix-ntfy.conf.j2"
+    dest: "{{ matrix_nginx_proxy_confd_path }}/matrix-ntfy.conf"
+    mode: 0644
+  when: matrix_nginx_proxy_proxy_ntfy_enabled|bool
+
 - name: Ensure Matrix nginx-proxy configuration for Matrix domain exists
   template:
     src: "{{ role_path }}/templates/nginx/conf.d/matrix-domain.conf.j2"
@@ -288,6 +295,12 @@
     state: absent
   when: "not matrix_nginx_proxy_proxy_sygnal_enabled|bool"
 
+- name: Ensure Matrix nginx-proxy configuration for ntfy domain deleted
+  file:
+    path: "{{ matrix_nginx_proxy_confd_path }}/matrix-ntfy.conf"
+    state: absent
+  when: "not matrix_nginx_proxy_proxy_ntfy_enabled|bool"
+
 - name: Ensure Matrix nginx-proxy homepage for base domain deleted
   file:
     path: "{{ matrix_nginx_proxy_data_path }}/matrix-domain/index.html"

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-ntfy.conf.j2

@@ -0,0 +1,100 @@
+#jinja2: lstrip_blocks: "True"
+
+{% macro render_vhost_directives() %}
+	gzip on;
+	gzip_types text/plain application/json application/javascript text/css image/x-icon font/ttf image/gif;
+
+	{% if matrix_nginx_proxy_hsts_preload_enabled %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+	{% else %}
+		add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+	{% endif %}
+	add_header X-XSS-Protection "{{ matrix_nginx_proxy_xss_protection }}";
+	add_header X-Content-Type-Options nosniff;
+	add_header X-Frame-Options DENY;
+
+{% for configuration_block in matrix_nginx_proxy_proxy_ntfy_additional_server_configuration_blocks %}
+	{{- configuration_block }}
+{% endfor %}
+
+	location / {
+		{% if matrix_nginx_proxy_enabled %}
+			{# Use the embedded DNS resolver in Docker containers to discover the service #}
+			resolver 127.0.0.11 valid=5s;
+			set $backend "matrix-ntfy:80";
+			proxy_pass http://$backend;
+		{% else %}
+			{# Generic configuration for use outside of our container setup #}
+			proxy_pass http://127.0.0.1:80;
+		{% endif %}
+
+		proxy_set_header Host $host;
+		proxy_set_header X-Forwarded-For {{ matrix_nginx_proxy_x_forwarded_for }};
+		proxy_set_header X-Forwarded-Proto {{ matrix_nginx_proxy_x_forwarded_proto_value }};
+	}
+{% endmacro %}
+
+server {
+	listen {{ 8080 if matrix_nginx_proxy_enabled else 80 }};
+	listen [::]:{{ 8080 if matrix_nginx_proxy_enabled else 80 }};
+
+	server_name {{ matrix_nginx_proxy_proxy_ntfy_hostname }};
+
+	server_tokens off;
+	root /dev/null;
+
+	{% if matrix_nginx_proxy_https_enabled %}
+		location /.well-known/acme-challenge {
+			{% if matrix_nginx_proxy_enabled %}
+				{# Use the embedded DNS resolver in Docker containers to discover the service #}
+				resolver 127.0.0.11 valid=5s;
+				set $backend "matrix-certbot:8080";
+				proxy_pass http://$backend;
+			{% else %}
+				{# Generic configuration for use outside of our container setup #}
+				proxy_pass http://127.0.0.1:{{ matrix_ssl_lets_encrypt_certbot_standalone_http_port }};
+			{% endif %}
+		}
+
+		location / {
+			return 301 https://$http_host$request_uri;
+		}
+	{% else %}
+		{{ render_vhost_directives() }}
+	{% endif %}
+}
+
+{% if matrix_nginx_proxy_https_enabled %}
+server {
+	listen {{ 8443 if matrix_nginx_proxy_enabled else 443 }} ssl http2;
+	listen [::]:{{ 8443 if matrix_nginx_proxy_enabled else 443 }} ssl http2;
+
+	server_name {{ matrix_nginx_proxy_proxy_ntfy_hostname }};
+
+	server_tokens off;
+	root /dev/null;
+
+	ssl_certificate {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_ntfy_hostname }}/fullchain.pem;
+	ssl_certificate_key {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_ntfy_hostname }}/privkey.pem;
+
+	ssl_protocols {{ matrix_nginx_proxy_ssl_protocols }};
+	{% if matrix_nginx_proxy_ssl_ciphers != '' %}
+	ssl_ciphers {{ matrix_nginx_proxy_ssl_ciphers }};
+	{% endif %}
+	ssl_prefer_server_ciphers {{ matrix_nginx_proxy_ssl_prefer_server_ciphers }};
+
+	{% if matrix_nginx_proxy_ocsp_stapling_enabled %}
+		ssl_stapling on;
+		ssl_stapling_verify on;
+		ssl_trusted_certificate {{ matrix_ssl_config_dir_path }}/live/{{ matrix_nginx_proxy_proxy_ntfy_hostname }}/chain.pem;
+	{% endif %}
+
+	{% if matrix_nginx_proxy_ssl_session_tickets_off %}
+		ssl_session_tickets off;
+	{% endif %}
+	ssl_session_cache {{ matrix_nginx_proxy_ssl_session_cache }};
+	ssl_session_timeout {{ matrix_nginx_proxy_ssl_session_timeout }};
+
+	{{ render_vhost_directives() }}
+}
+{% endif %}