discovery.docker "local" {
  host             = "unix:///var/run/docker.sock"
  refresh_interval = "5s"
}

discovery.relabel "docker" {
  targets = discovery.docker.local.targets

  //
  // Container Name
  //
  rule {
    source_labels = ["__meta_docker_container_name"]
    regex         = "/(.*)"
    replacement   = "$1"
    target_label  = "container"
  }

  //
  // Docker Compose
  //
  rule {
    source_labels = ["__meta_docker_container_label_com_docker_compose_service"]
    target_label  = "service"
  }

  rule {
    source_labels = ["__meta_docker_container_label_com_docker_compose_project"]
    target_label  = "compose_project"
  }

  //
  // Image
  //
  rule {
    source_labels = ["__meta_docker_container_image"]
    target_label  = "image"
  }

  //
  // stdout / stderr
  //
  rule {
    source_labels = ["__meta_docker_container_log_stream"]
    target_label  = "stream"
  }

  //
  // Query 用
  //
  rule {
    source_labels = ["__meta_docker_container_label_com_docker_compose_service"]
    target_label  = "job"
  }
}

loki.process "docker" {

  stage.static_labels {
    values = {
      node        = env("NODE_NAME"),
      environment = env("ENVIRONMENT"),
      platform    = "docker",
    }
  }

  forward_to = [loki.write.default.receiver]
}

loki.source.docker "local" {
  host = "unix:///var/run/docker.sock"

  targets = discovery.relabel.docker.output

  refresh_interval = "5s"

  forward_to = [
    loki.process.docker.receiver,
  ]
}

loki.write "default" {

  endpoint {
    url = env("LOKI_URL")
    tenant_id = env("LOKI_TENANT")
  }
}