| 2012-11-23 15:22:08 |
Jonathan Raffre |
description |
When trying to migrate an instance from a new compute node to an older compute node (hardware-wise), nova-computes fails saying that the CPU models are incompatible and leaves the instance in Error Status.
I did specify the CPU model in instances with the options :
libvirt_cpu_mode=custom
libvirt_cpu_model=kvm64
While it seems normal to refuse migration when libvirt_cpu_mode is set to host-model or host-passthrough, setting it to custom and using kvm64 in instances should not impact CPU compatibility between hosts.
Migrating the other way around (old to new) works correctly, mainly because of a superseeding set of instructions.
I'm using the Folsom Ubuntu packaged release of nova-compute on Ubuntu 12.10. |
When trying to migrate an instance from a new compute node to an older compute node (hardware-wise), nova-computes fails saying that the CPU models are incompatible and leaves the instance in Error Status.
I did specify the CPU model in instances with the options :
libvirt_cpu_mode=custom
libvirt_cpu_model=kvm64
While it seems normal to refuse migration when libvirt_cpu_mode is set to host-model or host-passthrough, setting it to custom and using kvm64 in instances should not impact CPU compatibility between hosts.
Migrating the other way around (old to new) works correctly, mainly because of a superseeding set of instructions.
I'm using the Folsom Ubuntu packaged release of nova-compute on Ubuntu 12.10.
Edit : Adding stacktrace
MSG_ID is fe5d9a7c1a634d7f9c0270e35fed083b from (pid=2363) multicall /usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py:354
[req-0512c53b-1b31-4924-a7d8-1ab57505ca0b ac90b7751f7f4da78f238916f3d01788 0173fc0a9e3d42caa34659f84ee7cb7c] Live migration of instance 97177534-6947-4756-9db5-b92fd4e504df to host os-node1 failed
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/contrib/admin_actions.py", line 282, in _migrate_live
disk_over_commit, host)
File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 94, in inner
return f(self, context, instance, *args, **kw)
File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 1960, in live_migrate
disk_over_commit, instance, host)
File "/usr/lib/python2.7/dist-packages/nova/scheduler/rpcapi.py", line 96, in live_migration
dest=dest))
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/proxy.py", line 80, in call
return rpc.call(context, self._get_topic(topic), msg, timeout)
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/__init__.py", line 102, in call
return _get_impl().call(cfg.CONF, context, topic, msg, timeout)
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/impl_kombu.py", line 712, in call
rpc_amqp.get_connection_pool(conf, Connection))
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py", line 368, in call
rv = list(rv)
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py", line 336, in __iter__
raise result
RemoteError: Remote error: InvalidCPUInfo_Remote Unacceptable CPU info: CPU doesn't have compatibility.
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
0
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
Refer to http://libvirt.org/html/libvirt-libvirt.html#virCPUCompareResult
Traceback (most recent call last):
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py", line 275, in _process_data
rval = self.proxy.dispatch(ctxt, version, method, **args)
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/dispatcher.py", line 145, in dispatch
return getattr(proxyobj, method)(ctxt, **kwargs)
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 117, in wrapped
temp_level, payload)
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
self.gen.next()
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 92, in wrapped
return f(*args, **kw)
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 2076, in check_can_live_migrate_destination
instance, block_migration, disk_over_commit)
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2238, in check_can_live_migrate_destination
self._compare_cpu(source_cpu_info)
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", line 2367, in _compare_cpu
raise exception.InvalidCPUInfo(reason=m % locals())
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
InvalidCPUInfo: Unacceptable CPU info: CPU doesn't have compatibility.
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
0
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions
Refer to http://libvirt.org/html/libvirt-libvirt.html#virCPUCompareResult
2012-11-14 22:33:41 TRACE nova.api.openstack.compute.contrib.admin_actions |
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