D4Science Infrastructure

To permanently change the resolvers on the GARR instances we need to modify the dhclient configuration, otherwise the first lease renewal will set the original values.

From the dhclient.conf configuration, the following options must be removed from the request directive:

domain-name, domain-name-servers, domain-search, host-name

Then, a restart of the networking service is mandatory to apply the new configuration.

After that, the resolv.conf configuration can be directly managed, as we always do, or we can rely on the resolvconf tool. If we choose the latter, the resolver configuration must be put inside /etc/resolvconf/resolv.conf.d/base.
There is no reason to use resolvconf, btw.