Add hostname as label

container-config/alloy/config.alloy

@@ -1,3 +1,6 @@
+logging {
+  level = "warn"
+}
 prometheus.exporter.unix "local" {
   rootfs_path = "/run/host"
   enable_collectors = ["systemd"]
@@ -18,6 +21,7 @@ prometheus.remote_write "writer" {
 }
 loki.source.journal "journald" {
   path = "/run/host/var/log/journal"
+  labels = {host = constants.hostname}
   relabel_rules = loki.relabel.journald.rules
   forward_to = [loki.write.writer.receiver]
 }

server/etc/containers/systemd/alloy.container

@@ -4,6 +4,7 @@ PodmanArgs=--pid=host
 UserNS=host
 Unmask=ALL
 Network=host
+Exec=run /etc/alloy/config.alloy --storage.path=/var/lib/alloy/data --disable-reporting
 Volume=/var/lib/system-config/container-config/alloy/config.alloy:/etc/alloy/config.alloy:z,ro
 Volume=alloy.volume:/var/lib/alloy/data:U,Z
 Volume=/:/run/host:ro