yahoo-eng-team team mailing list archive

[Zi Lian Ji <jizilian@xxxxxxxxxx>]

Public bug reported:

In the method '_sync_instance_power_state', the log info is wrong.

if self.host != db_instance.host:
            # on the sending end of nova-compute _sync_power_state
            # may have yielded to the greenthread performing a live
            # migration; this in turn has changed the resident-host
            # for the VM; However, the instance is still active, it
            # is just in the process of migrating to another host.
            # This implies that the compute source must relinquish
            # control to the compute destination.
            LOG.info(_("During the sync_power process the "
                       "instance has moved from "
                       "host %(src)s to host %(dst)s") %
                       {'src': self.host,
                        'dst': db_instance.host},
                     instance=db_instance)
            return

The 'src' value should be 'db_instance.host'and the 'dst' value should
be the 'self.host'.  The method '_post_live_migration' should be invoked
after the live migration completes and it is used to update the
database.

In the situation, the instance has been migrated to another host
successfully and the database has not been updated. The
'_sync_instance_power_state' method is executed. Nova can list it in the
dst host with the driver and the data in the database should be the
source host.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1370885

Title:
  The log info is error in the method '_sync_instance_power_state'

Status in OpenStack Compute (Nova):
  New

Bug description:
  In the method '_sync_instance_power_state', the log info is wrong.

  if self.host != db_instance.host:
              # on the sending end of nova-compute _sync_power_state
              # may have yielded to the greenthread performing a live
              # migration; this in turn has changed the resident-host
              # for the VM; However, the instance is still active, it
              # is just in the process of migrating to another host.
              # This implies that the compute source must relinquish
              # control to the compute destination.
              LOG.info(_("During the sync_power process the "
                         "instance has moved from "
                         "host %(src)s to host %(dst)s") %
                         {'src': self.host,
                          'dst': db_instance.host},
                       instance=db_instance)
              return

  The 'src' value should be 'db_instance.host'and the 'dst' value should
  be the 'self.host'.  The method '_post_live_migration' should be
  invoked after the live migration completes and it is used to update
  the database.

  In the situation, the instance has been migrated to another host
  successfully and the database has not been updated. The
  '_sync_instance_power_state' method is executed. Nova can list it in
  the dst host with the driver and the data in the database should be
  the source host.

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