swarm example with promethues

docker-stack.yml → examples/swarm/docker-stack.yml

@@ -1,8 +1,13 @@
 version: "3.8"
 
+networks:
+  docker-event-metrics-net:
+
 services:
   swarm:
     image: rjchicago/docker-event-metrics:${VERSION:-latest}
+    networks:
+      - docker-event-metrics-net
     environment:
       ENV: "${ENV:-local}"
       OPTIONS: '{"filter": {"scope": "swarm"}}'
@@ -15,6 +20,8 @@ services:
 
   local:
     image: rjchicago/docker-event-metrics:${VERSION:-latest}
+    networks:
+      - docker-event-metrics-net
     environment:
       ENV: "${ENV:-local}"
       INSTANCE: "{{.Node.Hostname}}"
@@ -25,4 +32,22 @@ services:
       - "8077:3000"
     deploy:
       mode: global
-
+
+  prometheus:
+    image: prom/prometheus
+    networks:
+      - docker-event-metrics-net
+    volumes:
+      - ./prometheus.yml:/etc/prometheus/prometheus.yml
+    ports:
+      - "9090:9090"
+    deploy:
+      replicas: 1
+
+  test:
+    image: alpine
+    command: tail -f /dev/null
+    networks:
+      - docker-event-metrics-net
+    deploy:
+      replicas: 1

examples/swarm/prometheus.yml

@@ -0,0 +1,9 @@
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+
+scrape_configs:
+  - job_name: 'docker-events'
+    static_configs:
+      - targets: [swarm:3000,local:3000]
+

examples/swarm/readme.md

@@ -0,0 +1,44 @@
+# Docker Swarm
+
+## deploy
+
+``` sh
+docker stack deploy -c docker-stack.yml docker-event-metrics --prune
+```
+
+## test
+
+Create some events...
+
+``` sh
+docker network create test
+docker network rm test
+docker run -it --rm alpine echo "hello"
+docker service update --replicas 3 docker-event-metrics_test
+docker service rm docker-event-metrics_test
+```
+
+Open ./metrics endpoints:
+
+> <http://localhost:8076/metrics>
+> <http://localhost:8077/metrics>
+
+## prometheus
+
+Open in Prometheus...
+
+> <http://localhost:9090>
+
+Example graph
+
+> <http://localhost:9090/graph?g0.expr=rate(docker_events%5B2m%5D)%20%3E%200&g0.tab=0&g0.stacked=0&g0.show_exemplars=0&g0.range_input=30m>
+
+``` sql
+rate(docker_events[2m]) > 0
+```
+
+## cleanup
+
+``` sh
+docker stack rm docker-event-metrics
+```