If you’re running debian/ubuntu as container OS, and you have a dhcp deployed, wich also is sending a search domain. Then you’re resolv.conf contains : search let.svc.cluster.local svc.cluster.local cluster.local kuber.local

Here is kuber.local our local domain ;( Due to the musl libc the resolving stops with alpine linux. Removing the kuber.local from resolv.conf fix the problem.