grafana-loki-stack.yml

version: '3.4'
services:
  grafana:
    image: grafana/grafana:latest
    depends_on:
      - loki
    ports:
     - "3000:3000"
    networks:
     - loki
    volumes:
      - grafana-data:/var/lib/grafana
    environment:
      - GF_PATHS_PROVISIONING=/etc/grafana/provisioning
      - GF_AUTH_ANONYMOUS_ENABLED=true
      - GF_AUTH_ANONYMOUS_ORG_ROLE=Admin
    entrypoint:
      - sh
      - -euc
      - |
        mkdir -p /etc/grafana/provisioning/datasources
        cat <<EOF > /etc/grafana/provisioning/datasources/ds.yaml
        apiVersion: 1
        datasources:
          - name: Loki
            type: loki
            access: proxy
            url: http://loki:3100
            jsonData:
              httpHeaderName1: "X-Scope-OrgID"
            secureJsonData:
              httpHeaderValue1: "tenant1"
        EOF
        /run.sh
    deploy: &deploy
      replicas: 1
    logging:
      driver: json-file
#    healthcheck:
#      test: [ "CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:3000/api/health || exit 1" ]
#      interval: 10s
#      timeout: 5s
#      retries: 5
  loki:
    image: grafana/loki:latest
    command:
     - -config.file=/etc/loki/loki-config.yaml
    ports:
      - "3100:3100"
    volumes:
      - loki-data:/loki
    networks:
     - loki
    configs:
     - source: loki_config
       target: /etc/loki/loki-config.yaml
    logging:
      driver: json-file
    deploy:
      <<: *deploy
    depends_on:
      - promtail

  promtail:
    deploy:
      <<: *deploy
    image: grafana/promtail:2.9.1
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    configs:
      - source: promtail_config
        target: /etc/promtail/config.yaml
    command: -config.file=/etc/promtail/config.yaml
    depends_on:
      - flog
    networks:
      - loki

  flog:
    deploy:
      <<: *deploy
    image: mingrammer/flog
    command: -f json -d 1s -l
    networks:
      - loki

networks:
  loki:
    driver: overlay
volumes:
  loki-data:
    driver: local
  grafana-data:
    driver: local
configs:
  loki_config:
    external: true
  promtail_config:
    external: true