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 abc6f647142b58447855ad36c3d8a3e9c526123d..1cb4be7c9b086ed99c1d9ab42b6874574beccec8 100644 (file)
--- a/monitoring/prometheus/alerts/ceph_default_alerts.yml
+++ b/monitoring/prometheus/alerts/ceph_default_alerts.yml
@@ -215,7 +215,7 @@ 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