Bug: /etc/hosts in compute pod is reset when kubectl debug is used

[cloneable]

Environment

compute pod

Steps to reproduce

Use kubectl debug to attach a sidecar container to a running compute. The kubelet resets /etc/hosts, essentially dropping the guest-vm entry.

Expected result

I expect /etc/hosts to be fully managed by k8s, so it's safe to use kubectl debug. One can use hostAliases to add extra entries to /etc/hosts file.

Actual result

The neonvm-runner manually adds a guest-vm entry that the kubelet doesn't know about.

Slack: https://neondb.slack.com/archives/C03TN5G758R/p1741256445956649