not sure how gh action docker networks work but let's see

.github/workflows/docker-publish.yml

@@ -104,3 +104,21 @@ jobs:
         # This step uses the identity token to provision an ephemeral certificate
         # against the sigstore community Fulcio instance.
         run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
+
+  test:
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Compose up
+        shell: bash
+        id: compose-up
+        run: |
+          docker compose up -d
+      - name: Test
+        shell: bash
+        run: |
+          ./test.sh

compose.yaml

@@ -21,6 +21,10 @@ services:
     environment:
       - SPRING_PROFILES_ACTIVE=postgres,o11y,file
       - POSTGRES_URL=jdbc:postgresql://postgres/petclinic
+    healthcheck:
+      test: [ "CMD", "curl", "-f", "http://localhost:8080/actuator/health" ]
+      timeout: 5s
+      retries: 3
     ports:
       - "8080:8080"
     networks:
@@ -65,11 +69,14 @@ services:
     image: grafana/tempo:latest
     container_name: tempo
     command: [ "-config.file=/etc/tempo.yaml" ]
+    # tempo seems to take 30s to shutdown. Who's got that much time?
+    stop_grace_period: 2s
     volumes:
       - ./compose/config/tempo-local.yaml:/etc/tempo.yaml
       - tempo_data:/tmp/tempo
     ports:
       - "9411:9411"   # zipkin
+      - "3200:3200"   # http
   promtail:
     image: grafana/promtail:latest
     container_name: promtail

compose/config/grafana-datasources.yml

@@ -3,7 +3,8 @@ apiVersion: 1
 datasources:
 - name: Prometheus
   type: prometheus
-  url: http://prometheus:9090 
+  uid: prometheus
+  url: http://prometheus:9090
   isDefault: true
   access: proxy
   editable: true
@@ -57,6 +58,7 @@ datasources:
       enabled: true
 - name: Loki
   type: loki
+  uid: loki
   access: proxy
   orgId: 1
   url: http://loki:3100

test.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+until curl -sSfo /dev/null http://localhost:3000/api/datasources/uid/prometheus/health; do echo Waiting for Grafana; sleep 1; done
+curl -sSfo /dev/null http://localhost:3000/api/datasources/uid/loki/health
+curl -sSfo /dev/null http://localhost:8080/actuator/health
+#docker compose ps --services --status running |grep tempo
+# tempo datasource health checks in grafana aren't supported as of now so just check ingester readiness
+until curl -sSfo /dev/null http://localhost:3200/ready; do echo Waiting for Tempo; sleep 1; done
+