Hi Eric, It would appear that the nova user on one of the compute nodes had at one time cached the SSH host key of the other node and now the key has changed. You can bypass this by adding the following to ~nova/.ssh/config on both compute nodes:
Host * StrictHostKeyChecking no UserKnownHostsFile=/dev/null --- Joseph Breu Deployment Engineer Rackspace Cloud Builders 210-312-3508 On May 21, 2012, at 11:34 AM, Eric Luo wrote: Hello ,all. I have a two nodes installation . OS1 is the cloud controller ,and OS2 is a nova-compute node. I have a vm (name as vm1) running on OS1. When I use the command nova migrate vm1 The dashboard is showing the vm1 as : status :error ,task :Resize Prep I tail ed the nova-compute.log in OS1, and found the following error information while running the nova migrate vm1 command : Can someone please explain to me what does these error mean ,and what's wrong with my config ... 2012-05-21 17:20:45 ERROR nova.compute.manager [req-d0f494cb-e9d6-41d2-b6df-6faa432a644d 6ffaaedb60c24f5eb888319e1e387d75 0d7a5a12b6f54aa9bff986bf138bc0b7] Unex pected error while running command. Command: ssh 192.168.0.205 mkdir -p /var/lib/nova/instances/instance-0000000a Exit code: 255 Stdout: '' Stderr: 'Host key verification failed.\r\n'. Setting instance vm_state to ERROR 2012-05-21 17:20:45 ERROR nova.rpc.amqp [req-d0f494cb-e9d6-41d2-b6df-6faa432a644d 6ffaaedb60c24f5eb888319e1e387d75 0d7a5a12b6f54aa9bff986bf138bc0b7] Exception during message handling 2012-05-21 17:20:45 TRACE nova.rpc.amqp Traceback (most recent call last): 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/rpc/amqp.py", line 252, in _process_data 2012-05-21 17:20:45 TRACE nova.rpc.amqp rval = node_func(context=ctxt, **node_args) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped 2012-05-21 17:20:45 TRACE nova.rpc.amqp return f(*args, **kw) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 153, in decorated_function 2012-05-21 17:20:45 TRACE nova.rpc.amqp function(self, context, instance_uuid, *args, **kwargs) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 177, in decorated_function 2012-05-21 17:20:45 TRACE nova.rpc.amqp sys.exc_info()) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__ 2012-05-21 17:20:45 TRACE nova.rpc.amqp self.gen.next() 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 171, in decorated_function 2012-05-21 17:20:45 TRACE nova.rpc.amqp return function(self, context, instance_uuid, *args, **kwargs) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1330, in resize_instance 2012-05-21 17:20:45 TRACE nova.rpc.amqp self._set_instance_error_state(context, instance_uuid) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__ 2012-05-21 17:20:45 TRACE nova.rpc.amqp self.gen.next() 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 1325, in resize_instance 2012-05-21 17:20:45 TRACE nova.rpc.amqp instance_type_ref, self._legacy_nw_info(network_info)) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 114, in wrapped 2012-05-21 17:20:45 TRACE nova.rpc.amqp return f(*args, **kw) 2012-05-21 17:20:45 TRACE nova.rpc.amqp File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/connection.py", line 2363, in migrate_disk_and_power_off 2012-05-21 17:20:45 TRACE nova.rpc.amqp raise e 2012-05-21 17:20:45 TRACE nova.rpc.amqp ProcessExecutionError: Unexpected error while running command. 2012-05-21 17:20:45 TRACE nova.rpc.amqp Command: ssh 192.168.0.205 mkdir -p /var/lib/nova/instances/instance-0000000a 2012-05-21 17:20:45 TRACE nova.rpc.amqp Exit code: 255 2012-05-21 17:20:45 TRACE nova.rpc.amqp Stdout: '' 2012-05-21 17:20:45 TRACE nova.rpc.amqp Stderr: 'Host key verification failed.\r\n' 2012-05-21 17:20:45 TRACE nova.rpc.amqp ^C _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : [email protected]<mailto:[email protected]> Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
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