Public bug reported:
When resizing an instance, the migration task calls
"replace_allocation_with_migration()', which checks to verify that the instance
has allocations against the source compute node [0]. It then replaces the
instance's allocation with the migration, using it's UUID as the consumer
instead of the instance's. However, if the first attempt at migrating fails and
the resize is rescheduled, when "replace_allocation_with_migration()" is called
again, the allocations now have the migration UUID as the consumer, and so the
check that the instance has allocations on the source compute node will fail,
and the migration is put in an ERROR state.
[0]
https://github.com/openstack/nova/blob/f95f165b49fbc0efe29450b0e858a3ccadecedea/nova/conductor/tasks/migrate.py#L47-L48
** Affects: nova
Importance: High
Assignee: Ed Leafe (ed-leafe)
Status: Confirmed
** Tags: migration placement queens-rc-potential resize
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https://bugs.launchpad.net/bugs/1741125
Title:
Instance resize always fails when rescheduling
Status in OpenStack Compute (nova):
Confirmed
Bug description:
When resizing an instance, the migration task calls
"replace_allocation_with_migration()', which checks to verify that the instance
has allocations against the source compute node [0]. It then replaces the
instance's allocation with the migration, using it's UUID as the consumer
instead of the instance's. However, if the first attempt at migrating fails and
the resize is rescheduled, when "replace_allocation_with_migration()" is called
again, the allocations now have the migration UUID as the consumer, and so the
check that the instance has allocations on the source compute node will fail,
and the migration is put in an ERROR state.
[0]
https://github.com/openstack/nova/blob/f95f165b49fbc0efe29450b0e858a3ccadecedea/nova/conductor/tasks/migrate.py#L47-L48
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