Red Hat Bugzilla – Bug 8281
Need to specify dhcpd startup options
Last modified: 2008-05-01 11:37:53 EDT
I need to restrict dhcpd to run on a specific interface, and this can only be done on its initial command line. It is trivial to do this by modifying /etc/rd.c/init.d/dhcpd, but this file is not tagged in the RPM as a configuration file (and indeed shouldn't be) so upgrades may not preserve it. It would be great if I could set something like DHCPD_STARTUP_OPTIONS in /etc/sysconfig/network or /etc/sysconfig/dhcpd instead of modifying an init.d file manually. Thanks!
I think the above is an excellent proposal, but I fail to understand how a bug can be NEW for over a year. Would a patch help?
Although pump has been the DHCP client impl of choice for a few versions, rawhide currently uses dhcpcd in a way that would seem to solve this problem transparently (because dhcpcd is run per-interface, etc.)
The issue was with the DHCP server, not the client. A machine with two interfaces might serve DHCP to one of them but doing so for the other could cause serious chaos. It's no big deal to edit /etc/init.d/dhcpd to fix this, but it would be nice if there was a supported way to do it without editing. Originally I though that an upgrade would wipe the manual changes out, but that turns out not to be the case, so it's even less of an issue than I thought it was so long ago. Editing the startup file has become an automatic part of setting up any new server for me.
My mistake on the package. I have a system that is supposed to serve DHCP on only one of its two interfaces, and the solution I use is to have an entry corresponding to the "don't serve DHCP" interface that looks like so: subnet 207.175.42.0 netmask 255.255.254.0 { not authoritative; } I seem to vaguely recall having problems getting your approach to work when I was setting this up, which is why I used this approach. Anyways, I've added a /etc/sysconfig/dhcpd to dhcp-2.0pl5-6, which should show up in rawhide soon and give you the option of using your approach.