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Reviewed:  https://review.openstack.org/424428
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=4cd32645fb26d39a900433c4c1dfecaac1767522
Submitter: Jenkins
Branch:    master

commit 4cd32645fb26d39a900433c4c1dfecaac1767522
Author: Huan Xie <huan.xie@xxxxxxxxxx>
Date:   Sun Jan 22 03:08:40 2017 -0800

    Fix live migrate with XenServer
    
    Live migration with XenServer as hypervisor failed with xapi
    errors "VIF_NOT_IN_MAP". There are two reasons for this
    problem:
    
    (1) Before XS7.0, it supports VM live migration without
    setting vif_ref and network_ref explicitly if the destination
    host has same network, but since XS7.0, it doesn't support
    this way, we must give vif_ref and network_ref mapping.
    
    (2) In nova, XenServer has introduced interim network for
    fixing ovs updating wrong port in neutron, see bug 1268955
    and also interim network can assist support neutron security
    group (linux bridge) as we cannot make VIF connected to
    linux bridge directly via XAPI
    
    To achieve this, we will add {src_vif_ref: dest_network_ref}
    mapping information, in pre_live_migration, we first create
    interim network in destination host and store
    {neutron_vif_uuid: dest_network_ref} in migrate_data, then in
    source host, before live_migration, we will calculate the
    {src_vif_ref: dest_network_ref} and set it as parameters to
    xapi when calling VM.migrate_send. Also, we will handle the
    case where the destination host is running older code that
    doesn't have this new src_vif_ref mapping, like live migrating
    from an Ocata compute node to a Newton compute node.
    
    Closes-bug: 1658877
    
    Change-Id: If0fb5d764011521916fbbe15224f524a220052f3


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1658877

Title:
  live migration failed with XenServer as hypervisor

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  I used devstack to deploy a multi compute node test environment with XenServer
  Then I executed the command "nova live-migration --block-migrate admin-vm5 ComputeNode3"
  Then I got the below errors:

  ===============================================
  2017-01-23 07:18:11.243 ERROR nova.virt.xenapi.vmops [req-6e4f8d0b-ea2f-4a69-bcd8-98d5f94e8ab0 admin admin] Migrate Send failed
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops Traceback (most recent call last):
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 2396, in live_migrate
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops     "VM.migrate_send", vm_ref, migrate_data)
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 2361, in _call_live_migrate_command
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops     vdi_map, vif_map, options)
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops   File "/usr/local/lib/python2.7/dist-packages/os_xenapi/client/session.py", line 200, in call_xenapi
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops     return session.xenapi_request(method, args)
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops   File "/usr/local/lib/python2.7/dist-packages/os_xenapi/client/XenAPI.py", line 130, in xenapi_request
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops     result = _parse_result(getattr(self, methodname)(*full_params))
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops   File "/usr/local/lib/python2.7/dist-packages/os_xenapi/client/XenAPI.py", line 212, in _parse_result
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops     raise Failure(result['ErrorDescription'])
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops Failure: ['VIF_NOT_IN_MAP', 'OpaqueRef:b0636c87-539f-59f6-8fef-8c15c6d58665']
  2017-01-23 07:18:11.243 TRACE nova.virt.xenapi.vmops

  
  ================================================
  2017-01-23 07:18:11.355 ERROR nova.compute.manager [req-6e4f8d0b-ea2f-4a69-bcd8-98d5f94e8ab0 admin admin] [instance: b539c9fd-6f29-472b-908c-5c0146c31917] Live migration failed.
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917] Traceback (most recent call last):
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]   File "/opt/stack/nova/nova/compute/manager.py", line 5368, in _do_live_migration
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]     block_migration, migrate_data)
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]   File "/opt/stack/nova/nova/virt/xenapi/driver.py", line 520, in live_migration
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]     recover_method, block_migration, migrate_data)
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 2414, in live_migrate
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]     recover_method(context, instance, destination_hostname)
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]     self.force_reraise()
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]     six.reraise(self.type_, self.value, self.tb)
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]   File "/opt/stack/nova/nova/virt/xenapi/vmops.py", line 2400, in live_migrate
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]     reason=_('Migrate Send failed'))
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917] MigrationError: Migration error: Migrate Send failed
  2017-01-23 07:18:11.355 TRACE nova.compute.manager [instance: b539c9fd-6f29-472b-908c-5c0146c31917]

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