promtail-config.yaml

server:
  http_listen_port: 9080
  grpc_listen_port: 0

positions:
  filename: /tmp/positions.yaml

clients:
  - url: http://${LOKI_HOSTNAME}:${LOKI_PORT}/loki/api/v1/push

scrape_configs:
  - job_name: prediction-service-logs
    docker_sd_configs:
      - host: unix:///var/run/docker.sock
        refresh_interval: 15s
        filters:
          - name: label
            # we may need to update this now that this is not deployed on the manager node (maybe filter by container name) 
            values: ["com.docker.swarm.service.name=${SERVICE_NAME_OF_INTEREST}"]

    # Clean up the container name (https://community.grafana.com/t/add-container-name-to-promtail-docker-logs/58572/5) 
    relabel_configs:
      - source_labels: ['__meta_docker_container_name']
        regex: '/(.*)'
        target_label: 'service'
      - source_labels: ['__meta_docker_container_name']
        regex: '/(.*)\.[0-9]\..*'
        target_label: 'service'
      - source_labels: ['__meta_docker_container_name']
        regex: '/(.*)\.[0-9a-z]*\..*'
        target_label: 'service'