Improve Prometheus metrics

README.md

@@ -88,10 +88,10 @@ RELAY_IP=0.0.0.0
 EXTERNAL_RELAY_IP=167.235.241.140
 ```
 
-Remember to use the `DOMAIN_NAME` variable specific to your deployment. It's used in e.g. `REALM` STUN attributes.
+Remember to use the `DOMAIN` variable specific to your deployment. It's used in e.g. `REALM` STUN attributes.
 
 ```console
-DOMAIN_NAME=my-amazing-turn.com
+DOMAIN=my-amazing-turn.com
 ```
 
 ### Auth

config/runtime.exs

@@ -124,7 +124,7 @@ config :rel,
   relay_ip: relay_ip,
   external_relay_ip: external_relay_ip,
   listen_port: System.get_env("UDP_LISTEN_PORT", "3478") |> ConfigUtils.parse_port(),
-  domain_name: System.get_env("DOMAIN_NAME", "example.com")
+  domain: System.get_env("DOMAIN", "example.com")
 
 # Metrics endpoint configuration
 config :rel,

docker-compose.yml

@@ -1,13 +1,24 @@
-version: '3.2'
+version: '3.8'
 services:
-  turn:
+  rel:
     image: ghcr.io/elixir-webrtc/rel:${TAG}
-    container_name: turn
+    container_name: rel
     restart: on-failure
     network_mode: host
     environment:
       DOMAIN: "${DOMAIN}"
 
+  node-exporter:
+    image: prom/node-exporter:v1.6.1
+    container_name: node_exporter
+    restart: on-failure
+    command:
+      - --path.rootfs=/host
+    network_mode: host
+    pid: host
+    volumes:
+      - /:/host:ro,rslave
+
   prometheus:
     image: prom/prometheus:v2.46.0
     container_name: prometheus
@@ -21,7 +32,8 @@ services:
       - ./prometheus.yml:/etc/prometheus/prometheus.yml:ro
       - prometheus_data:/prometheus
     depends_on:
-      - turn
+      - rel
+      - node-exporter
 
   grafana:
     image: grafana/grafana:10.0.3