mgr/dashboard:fix MTU Mismatch alert

This PR intends to fix the expression used for MTU Mismatch alert in prometheus

Signed-off-by: Aashish Sharma <aasharma@redhat.com>
(cherry picked from commit 8527489b9148a8845d6fccca6461b23ed7989172)

diff --git a/monitoring/prometheus/alerts/ceph_default_alerts.yml b/monitoring/prometheus/alerts/ceph_default_alerts.yml
index 92eb391677583e9b99c31ebea71c25ec060bfac5..eafc439fe401501555c9435c84859592139dd7b3 100644 (file)
--- a/monitoring/prometheus/alerts/ceph_default_alerts.yml
+++ b/monitoring/prometheus/alerts/ceph_default_alerts.yml
@@ -201,7 +201,7 @@ groups:
             rate of the past 48 hours.
 
       - alert: MTU Mismatch
-        expr: node_network_mtu_bytes{device!="lo"} != on(device) group_left() (quantile(0.5, node_network_mtu_bytes{device!="lo"}) by (device))
+        expr: node_network_mtu_bytes{device!="lo"} != on() group_left() (quantile(0.5, node_network_mtu_bytes{device!="lo"}))
         labels:
           severity: warning
           type: ceph_default