logging {
  level  = "info"
  format = "logfmt"
}

otelcol.receiver.otlp "api" {
  grpc {
    endpoint = "0.0.0.0:4317"
  }

  http {
    endpoint = "0.0.0.0:4318"
  }

  output {
    metrics = [otelcol.processor.transform.metric_labels.input]
    traces  = [otelcol.processor.batch.default.input]
  }
}

otelcol.processor.transform "metric_labels" {
  error_mode = "ignore"

  metric_statements {
    context = "datapoint"
    statements = [
      `set(attributes["service.name"], resource.attributes["service.name"])`,
      `set(attributes["deployment.environment"], resource.attributes["deployment.environment"])`,
    ]
  }

  output {
    metrics = [otelcol.processor.batch.default.input]
  }
}

otelcol.processor.batch "default" {
  output {
    metrics = [otelcol.exporter.prometheus.local.input]
    traces  = [otelcol.exporter.otlp.tempo.input]
  }
}

otelcol.exporter.prometheus "local" {
  forward_to = [prometheus.remote_write.local.receiver]
}

prometheus.remote_write "local" {
  endpoint {
    url = "http://prometheus:9090/api/v1/write"
  }
}

otelcol.exporter.otlp "tempo" {
  client {
    endpoint = "tempo:4317"

    tls {
      insecure = true
    }
  }
}

discovery.docker "linux" {
  host = "unix:///var/run/docker.sock"
}

discovery.relabel "docker_logs" {
  targets = []

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

  rule {
    source_labels = ["__meta_docker_container_label_com_docker_compose_service"]
    target_label  = "compose_service"
  }
}

loki.source.docker "default" {
  host          = "unix:///var/run/docker.sock"
  targets       = discovery.docker.linux.targets
  labels        = {"platform" = "docker"}
  relabel_rules = discovery.relabel.docker_logs.rules
  forward_to    = [loki.write.local.receiver]
}

loki.write "local" {
  endpoint {
    url = "http://loki:3100/loki/api/v1/push"
  }
}