Merge pull request #167 from trails-cool/infra/add-promtail

Add Promtail for Docker log shipping to Loki

infrastructure/docker-compose.yml

@@ -128,6 +128,17 @@ services:
       - /var/lib/docker/:/var/lib/docker:ro
       - /dev/disk/:/dev/disk:ro
 
+  promtail:
+    image: grafana/promtail:latest
+    restart: unless-stopped
+    volumes:
+      - /var/log:/var/log:ro
+      - /var/lib/docker/containers:/var/lib/docker/containers:ro
+      - ./promtail/promtail-config.yml:/etc/promtail/config.yml:ro
+    command: ["-config.file=/etc/promtail/config.yml"]
+    depends_on:
+      - loki
+
   prometheus:
     image: prom/prometheus:latest
     restart: unless-stopped

infrastructure/promtail/promtail-config.yml

@@ -0,0 +1,22 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: http://loki:3100/loki/api/v1/push
+
+scrape_configs:
+  - job_name: docker
+    static_configs:
+      - targets:
+          - localhost
+        labels:
+          job: docker
+          __path__: /var/lib/docker/containers/*/*.log
+    pipeline_stages:
+      - docker: {}
+      - labeldrop:
+          - filename