Merge branch 'main' into patch-1

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## 0.16.0 (2022-xx-xx)
 
+### Changes
+
+- Fix labels cardinality error when registering unknown pre-auth key [#519](https://github.com/juanfont/headscale/pull/519)
+
 ## 0.15.0 (2022-03-20)
 
 **Note:** Take a backup of your database before upgrading.

api.go

@@ -573,7 +573,7 @@ func (h *Headscale) handleAuthKey(
 			machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", pak.Namespace.Name).
 				Inc()
 		} else {
-			machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error").Inc()
+			machineRegistrations.WithLabelValues("new", RegisterMethodAuthKey, "error", "unknown").Inc()
 		}
 
 		return