Add prometheus to playground (#3752)

# Description
Currently the playground's `grafana` container is only there to support
`tempo` but you can't actually test any new metrics or queries with it.
This PR makes it so that `grafana` actually gets access to all the
metrics.

# Changes
- exposes separate `metrics` ports on containers where it's necessary
- adds a `prometheus` container that scrapes all the services pods
- configures `prometheus` as the default data source in `grafana`

## How to test
I manually checked that `grafana` gets access to metrics from all the
different pods and I built a new dashboard with it.

<img width="1257" height="673" alt="Screenshot 2025-10-08 at 09 45 30"
src="https://github.com/user-attachments/assets/bb297bac-39ad-4df7-b0a5-525cfea44d56"
/>

As a follow up we could consider somehow replicating our actual
dashboards but that goes beyond the scope of the PR (and probably isn't
that helpful anyway because the metrics reported by a locally running
instance are very far from what our actual deployments would look like).

Author: MartinquaXD

playground/docker-compose.fork.yml

@@ -93,7 +93,8 @@ services:
     depends_on:
       - db-migrations
     ports:
-      - 8080:80
+      - 8080:80 # API
+      - 9586:9586 # metrics
 
   autopilot:
     build:
@@ -132,6 +133,8 @@ services:
         condition: service_started
       chain:
         condition: service_healthy
+    ports:
+      - 9589:9589 # metrics
 
   driver:
     build:
@@ -155,7 +158,7 @@ services:
     volumes:
       - ../:/src
     ports:
-      - 9000:80
+      - 9000:80 # API & metrics
     depends_on:
       chain:
         condition: service_healthy
@@ -182,7 +185,7 @@ services:
     volumes:
       - ../:/src
     ports:
-      - 9001:80
+      - 9001:80 # API & metrics
 
   frontend:
     build:
@@ -220,6 +223,17 @@ services:
       - GF_AUTH_ANONYMOUS_ENABLED=true
       - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
       - GF_AUTH_DISABLE_LOGIN_FORM=true
+    volumes:
+      - ./grafana-prometheus.yml:/etc/grafana/provisioning/datasources/prometheus.yml
+
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    restart: always
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml
 
 volumes:
   postgres:

playground/docker-compose.non-interactive.yml

@@ -95,7 +95,8 @@ services:
     depends_on:
       - db-migrations
     ports:
-      - 8080:80
+      - 8080:80 # API
+      - 9586:9586 # metrics
 
   autopilot:
     build:
@@ -133,6 +134,8 @@ services:
         condition: service_started
       chain:
         condition: service_healthy
+    ports:
+      - 9589:9589 # metrics
 
   driver:
     build:
@@ -150,7 +153,7 @@ services:
     volumes:
       - ./driver.toml:/driver.toml
     ports:
-      - 9000:80
+      - 9000:80 # API & metrics
     depends_on:
       chain:
         condition: service_healthy
@@ -171,7 +174,7 @@ services:
     volumes:
       - ./baseline.toml:/baseline.toml
     ports:
-      - 9001:80
+      - 9001:80 # API & metrics
 
   frontend:
     build:
@@ -209,6 +212,18 @@ services:
       - GF_AUTH_ANONYMOUS_ENABLED=true
       - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
       - GF_AUTH_DISABLE_LOGIN_FORM=true
+    volumes:
+      - ./grafana-prometheus.yml:/etc/grafana/provisioning/datasources/prometheus.yml
+
+
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    restart: always
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml
 
 volumes:
   postgres:

playground/grafana-prometheus.yml

@@ -0,0 +1,15 @@
+datasources:
+  - name: Prometheus
+    url: http://prometheus:9090
+    type: prometheus
+    access: proxy
+    jsonData:
+      httpMethod: POST
+      manageAlerts: true
+      allowAsRecordingRulesTarget: true
+      prometheusType: Prometheus
+      prometheusVersion: 3.3.0
+      cacheLevel: 'High'
+      disableRecordingRules: false
+      timeInterval: 10s # Prometheus scrape interval
+      incrementalQueryOverlapWindow: 10m

playground/prometheus.yml

@@ -0,0 +1,23 @@
+global:
+  scrape_interval: 5s
+
+scrape_configs:
+  - job_name: "prometheus"
+    static_configs:
+      - targets: ["prometheus:9090"]
+
+  - job_name: "orderbook"
+    static_configs:
+      - targets: ["orderbook:9586"]
+
+  - job_name: "autopilot"
+    static_configs:
+      - targets: ["autopilot:9589"]
+
+  - job_name: "driver"
+    static_configs:
+      - targets: ["driver:80"]
+
+  - job_name: "baseline"
+    static_configs:
+      - targets: ["baseline:80"]