NodeHighNumberConntrackEntriesUsed #

Meaning #

Number of conntrack are getting close to the limit.

Impact #

When reached the limit then some connections will be dropped, degrading service quality.

Diagnosis #

Check current conntrack value on the node. Check which apps are generating a lot of connections.

Mitigation #

Migrate some pods to another nodes. Bump conntrack limit directly on the node, remembering to make it persistent across node reboots.