Jakub Libosvar 46978e4368 l3-ha: Send gratuitous ARP when new floating IP is added ... We rely on keepalived to send gratuitous ARPs when floating IP is added. Older versions of keepalived up to 1.2.20 (exclusive) contain bug [1] where keepalived does not send GARP on receiving SIGHUP. Unfortunately, newer versions containing the fix are not packaged yet for some distributions like RHEL or CentOS or Ubuntu Xenial, so this patch adds a workaround for such distributions until new packages are available. The patch also sets net.ipv4.ip_nonlocal_bind kernel parameter to 0 for Snat and HA router namespaces in order to avoid sending gratuitous ARPs for IP addresses that are not bound to the interface anymore - possibly because of failover or removal. Note that kernel < 3.19 contain a bug where this knob is missing. In case it attempts to set the parameter and it's missing on the system, it doesn't set the knob in root namespace like it's done for fip namespaces, but only issues a warning message. [1] https://bugzilla.redhat.com/show_bug.cgi?id=1391553 Conflicts: neutron/agent/linux/ip_lib.py neutron/agent/l3/keepalived_state_change.py Conflicts: neutron/agent/l3/dvr_fip_ns.py neutron/tests/functional/agent/l3/test_keepalived_state_change.py Change-Id: Ieab53624dc34dc687a0e8eebd84778f7fc95dd77 Closes-bug: 1639315 (cherry picked from commit 4fdd89e94f) (cherry picked from commit e8c0d7aef9)		2016-11-22 10:50:57 -05:00
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notes	l3-ha: Send gratuitous ARP when new floating IP is added	2016-11-22 10:50:57 -05:00
source	Add README with links on how to create release notes	2016-01-09 16:31:55 -08:00