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.