Public bug reported:
A single iteration of event processing is not sufficient to drain all of
the events on firstboot provisioning in Xen based clouds.
Specifically, instead of receiving a list of 7 events, one might only
receive 1 event at a time, spaced 1 or 2 seconds apart, until all
initial events are processed.
To work around the fact that supervisor is not batching all events
together, do the following:
* process events until there are none
* ensure that there were at least three iterations without any events
* then notify that daemon as ready, as no more early boot events are expected
* continue polling any interactive triggered events going forward
** Affects: rax-nova-agent (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1765057
Title:
rax-nova-agent does not drain the event queue, before starting
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