Red Hat Bugzilla – Bug 995142
DHCP FAIL $reason removes source routing configuration on management network
Last modified: 2016-02-10 14:57:08 EST
Description of problem: ntpd is getting signal 15, which sends DHCP FAIL, which is activating the DHCP sourceRoute.sh script with a DHCP remove statement, thus removing source routing on the management network, and only the management network. Version-Release number of selected component (if applicable): VDSM master - vdsm-4.12.0-44.git94918e0.el6.x86_64 Reason is unknown - It is happening a lot on a host of mine though so it is not a problem to reproduce, I just don't know how. It is unknown why ntpd is sending dhcp reason FAIL, and unknown why it's only sending it to the ovirtmgmt interface and not other active dhcp interfaces.
Created attachment 784474 [details] logs from /var/log/messages and /var/log/supervdsm
This started happening on my hosts a few days ago. This also happens if dhclient itself sends FAIL to its hooks: Aug 12 14:35:25 zeus02 dhclient[14632]: send_packet: No such device or address Aug 12 14:35:26 zeus02 dhclient[14632]: No DHCPOFFERS received. Aug 12 14:35:26 zeus02 dhclient[14632]: No working leases in persistent database - sleeping. Aug 12 14:35:26 zeus02 root: sourceRoute_restore called because FAIL I inserted the last line into the dhcp hook momentarily - You can see the reason is FAIL.
Assaf, can you please elaborate on how to test? I had source routing configured on the host, I've assigned VLAN with tag 1 to one host interface and had it configured with DHCP. Host does not have access to this VLAN so DHCP request for IP failed. Source routing was intact. Is this how it is supposed to work?
If you had an IP and source routing configured then a failed DHCP request doesn't remove the ip configuration from the device and thus should not remove source routing. The goal of the fix is that only if the ip configuration is removed then source routing should be removed. Sadly I don't know how to reproduce the bug. You can manually send a DHCP fail to test that source routing is not removed, but sending DHCP stop (Like what ifdown does) does.
This bug is currently attached to errata RHBA-2013:15291. If this change is not to be documented in the text for this errata please either remove it from the errata, set the requires_doc_text flag to minus (-), or leave a "Doc Text" value of "--no tech note required" if you do not have permission to alter the flag. Otherwise to aid in the development of relevant and accurate release documentation, please fill out the "Doc Text" field above with these four (4) pieces of information: * Cause: What actions or circumstances cause this bug to present. * Consequence: What happens when the bug presents. * Fix: What was done to fix the bug. * Result: What now happens when the actions or circumstances above occur. (NB: this is not the same as 'the bug doesn't present anymore') Once filled out, please set the "Doc Type" field to the appropriate value for the type of change made and submit your edits to the bug. For further details on the Cause, Consequence, Fix, Result format please refer to: https://bugzilla.redhat.com/page.cgi?id=fields.html#cf_release_notes Thanks in advance.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2014-0040.html