The Reference Guide (Appendix F. Kickstart Installations, Kickstart
Note, you can access the network in the %post section; however, name
service has not been configured at this point, so only IP addresses will
Name resolution works fine for me, so you can probably remove this.
I asked a developer working on kickstart and updated the sentence to say
If you configured the network with static IP information, including
a nameserver, you can access the network and resolve IP addresses in
the %post section. If you configured the network for DHCP,
the /etc/resolv.conf file has not been completed when the
installation executes the %post section. You can access the network,
but you can not resolve IP addresses. Thus, if you are using DHCP,
you must specify IP addresses in the %post section.
It is fixed in CVS and will be correct for the next release. Thank you
for your report.