diff --git a/docs/deployment.md b/docs/deployment.md
index b459445..20a81ad 100644
--- a/docs/deployment.md
+++ b/docs/deployment.md
@@ -33,6 +33,12 @@ users:
     ssh-authorized_keys:
 ```
 
+### Metrics
+
+Capsul integrates with Prometheus to grab the data for the capsul metric graphs. 
+
+The code that generates those metrics is here: https://github.com/kumina/libvirt_exporter
+
 ### autonomic / servers.coop version for ipv6 support 
 
 ```