feat: add dns container with AGH + unbound

lxc/dns/logs-adguard.alloy.nix

@@ -0,0 +1,49 @@
+{ ip, domainname, ... }:
+{
+  out = ''
+    loki.relabel "agh_journal" {
+      forward_to = []
+      rule {
+        source_labels = ["__journal__priority_keyword"]
+        target_label = "level"
+      }
+      rule {
+        source_labels = ["__journal__SYSLOG_IDENTIFIER"]
+        target_label = "app"
+      }
+    }
+    loki.source.journal "agh_journal_scrape" {
+      forward_to = [loki.process.agh_router.receiver]
+      matches = "_SYSTEMD_UNIT=adguardhome.service"
+      relabel_rules = loki.relabel.agh_journal.rules
+      labels = {
+        service = "adguardhome",
+        host = "${domainname}",
+        host_ip = "${ip}",
+      }
+    }
+
+    loki.process "agh_router" {
+      stage.regex {
+        expression = "^(?P<timestamp>\\S+ \\S+) \\[(?P<level>\\w+)\\] (?P<message>.*)$"
+      }
+
+      stage.timestamp {
+        source = "timestamp"
+        format = "2006-01-02 15:04:05"
+      }
+
+      stage.labels {
+        values = {
+          level = "level",
+        }
+      }
+
+      stage.output {
+        source = "message"
+      }
+
+      forward_to = [loki.write.grafana_loki.receiver]
+    }
+  '';
+}