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There is no kubernetes API to do this. At your own risk, you could stop k3s service, modify the

node-ip

config and restart the k3s service. But there might be connectivity problems. This is a use case that is not tested

For a multi node cluster the best and I think correct thing is to remove a node and add it back in with the new ip. I have done with to reply all my controllers with new devices.

Thanks @bland-account-99790 I tried it after restart k3s service i got error

Failed to test data store connection: this server is a not a member of the etcd cluster.

looking for old IP Tried to remove

/var/lib/rancher/k3s/server/db/etcd/member/*

k3s start successfully but all resources have been removed. Thanks @cool-room-99795