// Alloy on a legacy MIG instance (design 4.1 / 4.3): legacy-api metrics -> Mimir (job="legacy-api", instance=<vm name>),
// container logs -> Loki (job="legacy-api"). Single tenant: no X-Scope-OrgID.
prometheus.scrape "legacy_api" {
  job_name        = "legacy-api"
  scrape_interval = "15s"
  targets         = [{ "__address__" = "legacy-api:8080", "instance" = sys.env("INSTANCE") }]
  forward_to      = [prometheus.remote_write.mimir.receiver]
}

prometheus.remote_write "mimir" {
  endpoint { url = "http://10.20.0.10:9009/api/v1/push" }
}

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

discovery.relabel "containers" {
  targets = discovery.docker.local.targets
  rule { source_labels = ["__meta_docker_container_name"], regex = "/(.*)", target_label = "container" }
  rule { target_label = "job", replacement = "legacy-api" }
  rule { target_label = "instance", replacement = sys.env("INSTANCE") }
}

loki.source.docker "containers" {
  host       = "unix:///var/run/docker.sock"
  targets    = discovery.relabel.containers.output
  forward_to = [loki.write.loki.receiver]
}

loki.write "loki" {
  endpoint { url = "http://10.20.0.10:3100/loki/api/v1/push" }
}