cephadm (squid & tentacle) deploys alertmanager with some default
alerts. One is CephNodeInconsistentMTU which checks if the MTU of each
interface with the same name is the same across the cluster.
However if your cluster nodes are not identical, and have differing
interface names, we end up with lots of permanent alerts. Although I can
silence the alert (matching the alert name) for a long time, they still
show up in the dashboard.
The alerts are different permutations of:
Node ceph3 has a different MTU size (1500) than the median of
devices named enp4s0.
Since that check is inappropriate in a heterogeneous cluster, what's the
recommended way of disabling it, which won't get overwritten with
redeployment of the monitoring stack?
Thanks, Chris
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