this is like "noop" information but it's good to know that nothing
specific to both these apps needs to be done.

service/prometheus.md

@@ -2398,12 +2398,18 @@ But the file was simply removed in this case.
 
 ## Disaster recovery
 
-If a Prometheus/Grafana is destroyed, it should be completely
-re-buildable from Puppet. Non-configuration data should be restored
-from backup, with `/var/lib/prometheus/` being sufficient to
-reconstruct history. If even backups are destroyed, history will be
-lost, but the server should still recover and start tracking new
-metrics.
+If a Prometheus/Grafana is destroyed, it should be completely re-buildable from
+Puppet.
+
+Non-configuration data should be restored from backup, with
+`/var/lib/prometheus/` being sufficient to reconstruct history.
+
+If even backups are destroyed, history will be lost, but the server should still
+recover and start tracking new metrics.
+
+Note that neither Alertmanager nor Karma hold specific state data, so nothing
+needs to be taken out of backups for those and as long as prometheus is tracking
+metrics they should both be working as well.
 
 # Reference