(prometheus) Add in-docker prometheus instance to exfiltrate metrics from the docker-based services

docker-compose.yml

@@ -8,10 +8,8 @@ x-svc: &service
     - logs:/var/log/wmsa
   networks:
     - wmsa
-  depends_on:
-    mariadb:
-        condition: service_healthy
-
+  labels:
+    - "__meta_docker_port_private=7000"
 x-p1: &partition-1
   env_file:
     - "run/env/service.env"
@@ -201,6 +199,18 @@ services:
       - "/var/run/docker.sock:/var/run/docker.sock:ro"
     networks:
       - wmsa
+  prometheus:
+    image: "prom/prometheus"
+    container_name: "prometheus"
+    command:
+      - "--config.file=/etc/prometheus/prometheus.yml"
+    ports:
+      - "127.0.0.1:8091:9090"
+    volumes:
+      - "./run/prometheus.yml:/etc/prometheus/prometheus.yml"
+      - "/var/run/docker.sock:/var/run/docker.sock:ro"
+    networks:
+      - wmsa
 networks:
   wmsa:
 volumes:

run/prometheus.yml

@@ -0,0 +1,13 @@
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+
+scrape_configs:
+  - job_name: docker
+    docker_sd_configs:
+      - host: unix:///var/run/docker.sock
+    relabel_configs:
+      - source_labels:
+          - '__meta_docker_network_ip'
+        target_label: '__address__'
+        replacement: '$1:7000'