Observability and Logging with Loki Stack

monitoring/docker-compose.yml

@@ -0,0 +1,137 @@
+name: lab07-monitoring
+
+version: "3.8"
+
+x-default-resources: &default-resources
+  deploy:
+    resources:
+      limits:
+        cpus: "1.0"
+        memory: 1G
+      reservations:
+        cpus: "0.25"
+        memory: 256M
+
+services:
+  loki:
+    image: grafana/loki:3.0.0
+    container_name: loki
+    command:
+      - -config.file=/etc/loki/config.yml
+    ports:
+      - "3100:3100"
+    volumes:
+      - ./loki/config.yml:/etc/loki/config.yml:ro
+      - loki-data:/loki
+    networks:
+      - logging
+    labels:
+      logging: "promtail"
+      app: "devops-loki"
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:3100/ready || exit 1"]
+      interval: 10s
+      timeout: 5s
+      retries: 10
+      start_period: 15s
+    <<: *default-resources
+
+  promtail:
+    image: grafana/promtail:3.0.0
+    container_name: promtail
+    command:
+      - -config.file=/etc/promtail/config.yml
+    ports:
+      - "9080:9080"
+    volumes:
+      - ./promtail/config.yml:/etc/promtail/config.yml:ro
+      - promtail-positions:/tmp/positions
+      - /var/lib/docker/containers:/var/lib/docker/containers:ro
+      - /var/run/docker.sock:/var/run/docker.sock:ro
+    networks:
+      - logging
+    labels:
+      logging: "promtail"
+      app: "devops-promtail"
+    depends_on:
+      loki:
+        condition: service_healthy
+    restart: unless-stopped
+    <<: *default-resources
+
+  grafana:
+    image: grafana/grafana:12.3.1
+    container_name: grafana
+    ports:
+      - "3000:3000"
+    environment:
+      GF_AUTH_ANONYMOUS_ENABLED: "false"
+      GF_SECURITY_ALLOW_EMBEDDING: "false"
+      GF_USERS_ALLOW_SIGN_UP: "false"
+      GF_SECURITY_ADMIN_USER: "${GRAFANA_ADMIN_USER:-admin}"
+      GF_SECURITY_ADMIN_PASSWORD: "${GRAFANA_ADMIN_PASSWORD:?set GRAFANA_ADMIN_PASSWORD in monitoring/.env}"
+    volumes:
+      - grafana-data:/var/lib/grafana
+      - ./grafana/provisioning:/etc/grafana/provisioning:ro
+      - ./grafana/dashboards:/var/lib/grafana/dashboards:ro
+    networks:
+      - logging
+    labels:
+      logging: "promtail"
+      app: "devops-grafana"
+    depends_on:
+      loki:
+        condition: service_healthy
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:3000/api/health || exit 1"]
+      interval: 15s
+      timeout: 5s
+      retries: 10
+      start_period: 25s
+    <<: *default-resources
+
+  app-python:
+    build:
+      context: ../app_python
+      dockerfile: Dockerfile
+    image: devops-info-service:lab07
+    container_name: app-python
+    environment:
+      HOST: 0.0.0.0
+      PORT: 8000
+      PYTHONUNBUFFERED: "1"
+    ports:
+      - "8000:8000"
+    networks:
+      - logging
+    labels:
+      logging: "promtail"
+      app: "devops-python"
+    depends_on:
+      promtail:
+        condition: service_started
+    restart: unless-stopped
+    healthcheck:
+      test:
+        [
+          "CMD",
+          "python",
+          "-c",
+          "import urllib.request; urllib.request.urlopen('http://localhost:8000/health', timeout=3)",
+        ]
+      interval: 15s
+      timeout: 5s
+      retries: 5
+      start_period: 10s
+    <<: *default-resources
+
+volumes:
+  loki-data:
+  grafana-data:
+  promtail-positions:
+
+networks:
+  logging:
+    driver: bridge