Raf Smeets created CLOUDSTACK-10377:
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Summary: Nuage VSP regression fails in NetworksWithCleanup test
since introduction of fix for Since fix for CLOUDSTACK-9114 in ACS 4.11&master
Key: CLOUDSTACK-10377
URL: https://issues.apache.org/jira/browse/CLOUDSTACK-10377
Project: CloudStack
Issue Type: Bug
Security Level: Public (Anyone can view this level - this is the default.)
Affects Versions: 4.12, 4.11.1.0
Environment: ACS 4.11 or master with Nuage VSP 5.2.x
Reporter: Raf Smeets
Nuage VSP regression fails in NetworksWithCleanup test since introduction of
fix for Since fix for CLOUDSTACK-9114 in ACS 4.11&master
In Nuage Networks QA regression cycle, cloudstackExpress is failing for master
& 4.11 in expressrestartNetworksWithCleanup test.
The error is Unable to create a deployment.
Issue is caused by fixing https://issues.apache.org/jira/browse/CLOUDSTACK-9114
Reason is that for non-redundant routers, a strategy was implemented where
first a new VR is deployed, then old VR is powered-off/destroyed, and the new
VR is again re-programmed. With this strategy, two identical VRs may be up for
a brief moment (few seconds) where both can serve traffic, however the new VR
performs arp-ping on its interfaces to update neighbours. After the old VR is
removed, the new VR is re-programmed which among many things performs another
arpping. The theoretical downtime is therefore limited by the arp-cache refresh
which can be up to 30 seconds. In my experiments, against various VMware, KVM
and XenServer versions I found that the downtime was indeed less than 30s,
usually between 5-20 seconds. Compared to older ACS versions, especially in
cases where VRs deployment require full volume copy (like in VMware) a 10x-12x
improvement was seen.BUT NUAGE PLUGIN FAILS AS IP ADDRESS IS ALREADY IN USE.
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