local.file_match "var_logs" {
  path_targets = [
    { "__address__" = "localhost", "__path__" = "/var/log/messages", "job" = "var-logs", "instance" = constants.hostname },
    { "__address__" = "localhost", "__path__" = "/var/log/*.log", "job" = "var-logs", "instance" = constants.hostname },
  ]
}

loki.relabel "var_logs_processing" {
  rule {
    source_labels = ["__path__"]
    target_label  = "filename"
    regex       = ".*/(?P<name>[^/]+)\\$"
    replacement = "$${name}"
  }


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

loki.source.file "var_logs_source" {
  targets    = local.file_match.var_logs.targets
  forward_to = [loki.relabel.var_logs_processing.receiver]
}

loki.relabel "journald_processing" {
  rule {
    target_label = "hostname"
    replacement  = constants.hostname
  }

  rule {
    source_labels = ["__journal__systemd_unit"]
    target_label  = "systemd_unit"
  }

  rule {
    source_labels = ["__journal__transport"]
    target_label  = "transport"
  }

  rule {
    source_labels = ["__journal__priority_keyword"]
    target_label  = "level"
  }

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

loki.source.journal "debian_journald" {
  path       = "/var/log/journal"
  max_age    = "1h"
  labels     = { job = "journald", instance = constants.hostname }
  forward_to = [loki.relabel.journald_processing.receiver]
}

loki.write "local_loki" {
  endpoint {
    url = "http://grafana.narwain.home:3100/loki/api/v1/push"
  }

  external_labels = {
    cluster = "home-cluster",
    env     = "prod",
  }
}