doc/rados/operations/health-checks: Added MON_COLOCATED health warning

Update the Health Checks doc page with MON_COLOCATED warning

Fixes: https://tracker.ceph.com/issues/74955
Signed-off-by: Eric Zhang <emzhang@ibm.com>

diff --git a/doc/rados/operations/health-checks.rst b/doc/rados/operations/health-checks.rst
index aece61714368146c4fe6b15a078f8b04344c4a9c..a0d652d90b106bfa5013061f4505e98a8d850890 100644 (file)
--- a/doc/rados/operations/health-checks.rst
+++ b/doc/rados/operations/health-checks.rst
@@ -199,6 +199,23 @@ To disable the grace period entirely (immediate reporting), set the value to 0:
 
    ceph config set mon mon_netsplit_grace_period 0
 
+MON_COLOCATED
+____________
+
+Two or more Monitors are located on the same node. This health check is 
+raised when multiple Monitors share the same IP address. This check is by 
+default disabled. 
+
+Colocation of Monitors can increase the risk that a host, rack, or network 
+failure prevents the Monitors from forming a Paxos quorum, which may 
+stall cluster operations.
+
+To enable the :confval:`mon_warn_on_colocated_monitors` warning, run the following command:
+
+.. prompt:: bash #
+
+   ceph config set mon mon_warn_on_colocated_monitors true
+
 AUTH_INSECURE_GLOBAL_ID_RECLAIM
 _______________________________