server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: /mnt/promtail/positions.yaml # Pfad im gemounteten Volume

clients:
  - url: http://loki:3100/loki/api/v1/push # Sendet Logs an den Loki-Service

scrape_configs:
  - job_name: docker_containers
    docker_sd_configs:
      - host: unix:///var/run/docker.sock
        refresh_interval: 5s
    relabel_configs:
      # Extrahiere Container-Name (ohne '/')
      - source_labels: ['__meta_docker_container_name']
        regex: '/(.*)'
        target_label: 'container_name'
      # Behalte den Log-Stream (stdout/stderr) als Label
      - source_labels: ['__meta_docker_container_log_stream']
        target_label: 'logstream'
      # Extrahiere Service-Name aus Swarm-Label
      - source_labels: ['__meta_docker_container_label_com_docker_swarm_service_name']
        target_label: 'service_name'
      # Extrahiere Task-Name aus Swarm-Label
      - source_labels: ['__meta_docker_container_label_com_docker_swarm_task_name']
        target_label: 'task_name'
      # Füge 'instance'-Label mit dem Hostnamen des Tasks hinzu (Annäherung an Node-Namen)
      - action: replace
        source_labels: ['container_name'] # Braucht ein existierendes Label als Quelle
        target_label: 'instance'
        replacement: ${HOSTNAME} # Nutzt Swarm HOSTNAME Variable
      # Verwerfe Logs von Promtail selbst (Regex ggf. an Stacknamen anpassen)
      - source_labels: ['container_name']
        regex: 'monitoring_promtail.*' # Passe 'monitoring' an deinen Stack-Namen an!
        action: drop