Kubernetes connection tracking

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Cluster information:

Kubernetes version: 1.24
Cloud being used: (put bare-metal if not on a public cloud)
Installation method:
Host OS: Host on Amazon EKS
CNI and version: Amazon VPC CNI v1.12.6-eksbuild.1
CRI and version: contained


Have noticed that contrack_entries always reports a sawtooth pattern with a frequency of 2 minutes. The values peak to 2-3x and come down I,e for a given host connection tracking entries ramp up to 6000 from 2000 in 2 mins and fall back.

I don’t get any info on this behavior. I am planning to run a nodejs powered web socket service in Kubernetes that requires to have a persistent backend connection. Need a clarification if this will have any impact on the service