add Ceph state "active+clean+laggy" to constants.py

and add metric_pgstate_active_clean_laggy

CMK-25499

Co-authored-by: Benedikt Seidl <benedikt.seidl@checkmk.com>
Change-Id: I08504105eec094195fad89259f45eaab150510f4
Closes: #844

Author: HenriWahl

.werks/18477.md

@@ -0,0 +1,17 @@
+[//]: # (werk v2)
+# cephstatus: Remap monitoring state of Ceph cluster state
+
+key        | value
+---------- | ---
+date       | 2025-10-06T09:47:33+00:00
+version    | 2.4.0p14
+class      | fix
+edition    | cre
+component  | checks
+level      | 1
+compatible | yes
+
+If the state of Ceph cluster was `active+clean+laggy` the check plug-in
+`cephstatus` would go to state `UNKNOWN`.
+
+With this Werk, the state is now `OK`.

cmk/plugins/ceph/constants.py

@@ -12,6 +12,7 @@
         "activating+undersized+degraded",
         "active+clean",
         "active+clean+inconsistent",
+        "active+clean+laggy",
         "active+clean+remapped",
         "active+clean+scrubbing",
         "active+clean+scrubbing+deep",

cmk/plugins/ceph/graphing/ceph_metrics.py

@@ -40,6 +40,12 @@
     unit=UNIT_COUNTER,
     color=metrics.Color.BLUE,
 )
+metric_pgstate_active_clean_laggy = metrics.Metric(
+    name="pgstate_active_clean_laggy",
+    title=Title("PGs Active + Clean + Laggy"),
+    unit=UNIT_COUNTER,
+    color=metrics.Color.DARK_CYAN,
+)
 metric_pgstate_active_clean_remapped = metrics.Metric(
     name="pgstate_active_clean_remapped",
     title=Title("PGs Active + Clean + Remapped"),