** Also affects: nova/queens
Importance: Undecided
Status: New
** Changed in: nova/queens
Status: New => Confirmed
** Changed in: nova/queens
Importance: Undecided => Medium
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1597596
Title:
network not always cleaned up when spawning VMs
Status in OpenStack Compute (nova):
In Progress
Status in OpenStack Compute (nova) ocata series:
Confirmed
Status in OpenStack Compute (nova) pike series:
Confirmed
Status in OpenStack Compute (nova) queens series:
Confirmed
Bug description:
Here are the scenario:
1). Nova scheduler/conductor selects a nova-compute A to spin a VM
2). Nova compute A tries to spin the VM, but the process failed, and
generates a RE-SCHEDULE exception.
3). in re-schedule exception, only when retry is none, network resource is
properly cleaned up. when retry is not none, the network is not cleaned up, the
port information still stays with the VM.
4). Nova condutor was notified about the failure. It selects nova-compute-B
to spin VM.
5). nova compute B spins up VM successfully. However, from the
instance_info_cache, the network_info showed two ports allocated for VM, one
from the origin network A that associated with nova-compute A nad one from
network B that associated with nova compute B.
To simulate the case, raise a fake exception in
_do_build_and_run_instance in nova-compute A:
diff --git a/nova/compute/manager.py b/nova/compute/manager.py
index ac6d92c..8ce8409 100644
--- a/nova/compute/manager.py
+++ b/nova/compute/manager.py
@@ -1746,6 +1746,7 @@ class ComputeManager(manager.Manager):
filter_properties)
LOG.info(_LI('Took %0.2f seconds to build instance.'),
timer.elapsed(), instance=instance)
+ raise exception.RescheduledException(
instance_uuid=instance.uuid, reason="simulated-fault")
return build_results.ACTIVE
except exception.RescheduledException as e:
retry = filter_properties.get('retry')
environments:
*) nova master branch
*) ubuntu 12.04
*) kvm
*) bridged network.
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