----- Original Message ----- > From: "Dan Sneddon" <dsned...@redhat.com> > To: openstack-dev@lists.openstack.org > Sent: Wednesday, November 9, 2016 4:28:55 PM > Subject: [openstack-dev] [TripleO] dhclient spawned by dhcp-all-interfaces > doesn't exit when os-net-config runs > > I just opened a bug [1] for behavior which has recently been observed > when deploying nodes with TripleO. The problem is that the dhclient > processes that are being started by the dhcp-all-interfaces element in > disk-image-builder are not stopping after os-net-config runs. > > Step 1) Image deploys with udev rule to create > dhcp-interface@<iface>.service, which configures each interface via DHCP. > > Step 2) The deployment scripts run, including os-net-config, which > configures and restarts the interfaces. The udev rule is removed. > > At this point, the dhclient which was created by the udev rule is no > longer needed, except it is still running and configuring IP and routes > on the interface, possibly in conflict with the desired configuration. > For instance, the same IP appearing on a bridge and on an interface, or > a rogue default route and IP that hijack the default route. > > I believe this behavior is new in RHEL 7.3, but I don't know if any > versions of CentOS are affected yet (testing is in progress). > > Running 'systemctl restart network' after os-net-config runs will kill > the dhclient processes, so inserting that into the scripts after > os-net-config is run is one possible workaround, although the brief > interruption in networking might cause unknown issues in > high-availability environments. > > Does anyone have a suggestion for a kinder, gentler, less hacky > approach than either restarting the network service or running kill on > the dhclient processes? Also, does anyone have any idea why running > "ifdown <iface>" followed by "ifup <iface>" doesn't stop the dhclient > process started by the udev rule? Or why this behavior appears to be > new to RHEL 7.3?
Dan, Fix proposed here[2] to stop dhclient instances in os-net-config using '-r' argument if the interface is not configured for DHCP. Bob [2]https://review.openstack.org/#/c/396446/ > > [1] - https://bugs.launchpad.net/tripleo/+bug/1640598 > > -- > Dan Sneddon | Senior Principal OpenStack Engineer > dsned...@redhat.com | redhat.com/openstack > dsneddon:irc | @dxs:twitter > > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev > __________________________________________________________________________ OpenStack Development Mailing List (not for usage questions) Unsubscribe: openstack-dev-requ...@lists.openstack.org?subject:unsubscribe http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev