I have a server with two interfaces connected to two separate networks, using DHCP for both. When dhclient is writing /etc/resolv.conf, I would like it to append settings that aren't already there. For instance, if I receive from one DHCP server:
nameserver 10.0.0.1
search one.mydomain.com
and from another:
nameserver 10.1.1.254
search two.mydomain.com
Then resolv.conf should look like this:
search one.mydomain.com two.mydomain.com
nameserver 10.0.0.1
nameserver 10.1.1.254
At the moment, it seems the last dhclient overwrites whatever was there. I know I can preconfigure settings in dhclient.conf using supercede or append, but then I have to hard-code the values. I've scoured the man page for dhclient, but it seems like dhclient prefers to work alone (i.e. not in conjunction with any other dhclients)…or am I missing something?
Best Answer
It seems, the most apropriate way is to use custom dhclient-script for each interface and write DNS parameters in separate files (i.e. /etc/resolv.d/eth[01]) and then call script that merges all these files in global /etc/resolv/conf