Public bug reported:
Nova will accept an unbounded number of live migrations for a single
host, which will result in timeouts and failures (at least for libvirt).
Since live migrations are seriously IO intensive, allowing this to be
unlimited is just never going to be the right thing to do, especially
when we have functions in our own client to live migrate all instances
to other hosts (nova host-evacuate-live).
We recently added a build semaphore to allow capping the number of
parallel builds being attempted on a compute host for a similar reason.
This should be the same sort of thing for live migration.
** Affects: nova
Importance: Low
Status: New
** Changed in: nova
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1478108
Title:
Live migration should throttle itself
Status in OpenStack Compute (nova):
New
Bug description:
Nova will accept an unbounded number of live migrations for a single
host, which will result in timeouts and failures (at least for
libvirt). Since live migrations are seriously IO intensive, allowing
this to be unlimited is just never going to be the right thing to do,
especially when we have functions in our own client to live migrate
all instances to other hosts (nova host-evacuate-live).
We recently added a build semaphore to allow capping the number of
parallel builds being attempted on a compute host for a similar
reason. This should be the same sort of thing for live migration.
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1478108/+subscriptions
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