// Discover all running Docker containers
discovery.docker "containers" {
  host = "unix:///var/run/docker.sock"
}

// Extract a clean "container" label from the container name
discovery.relabel "containers" {
  targets = discovery.docker.containers.targets

  rule {
    source_labels = ["__meta_docker_container_name"]
    regex         = "/(.*)"
    target_label  = "container"
  }

  rule {
    source_labels = ["__meta_docker_container_name"]
    regex         = "/(.*)"
    target_label  = "container_name"
  }

  rule {
    target_label = "instance"
    replacement  = constants.hostname
  }
}

// Tail logs from every discovered container
loki.source.docker "containers" {
  host       = "unix:///var/run/docker.sock"
  targets    = discovery.relabel.containers.output
  forward_to = [loki.write.default.receiver]
}

// Ship to the local Loki instance
loki.write "default" {
  endpoint {
    url = "http://loki:3100/loki/api/v1/push"
  }
}