Hi all,

I have a multi node setup and wanted to play with migration. Currently
I'm getting strange SSH errors. I followed the
http://docs.openstack.org/havana/install-guide/install/apt/content/ guide.

The first error was a host key verification error. After adding an SSH
config to <NOVA_HOME>/.ssh/config and giving the nova user an SSH key /
authorized keys file on all nodes (including the controller) I get:

> amqp [req-bd6b7183-139c-4885-a93c-705b3caf5ce8 
> 516346b4ad844ed7872a179ac663d5d9 62baf66a77e946d191fb4cc785b28e76] Exception 
> during message handling
> amqp Traceback (most recent call last):
> amqp   File 
> "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/amqp.py", line 
> 461, in _process_data
> amqp     **args)
> amqp   File 
> "/usr/lib/python2.7/dist-packages/nova/openstack/common/rpc/dispatcher.py", 
> line 172, in dispatch
> amqp     result = getattr(proxyobj, method)(ctxt, **kwargs)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 353, in decorated_function
> amqp     return function(self, context, *args, **kwargs)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 90, in 
> wrapped
> amqp     payload)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/exception.py", line 73, in 
> wrapped
> amqp     return f(self, context, *args, **kw)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 243, in decorated_function
> amqp     pass
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 229, in decorated_function
> amqp     return function(self, context, *args, **kwargs)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 294, in decorated_function
> amqp     function(self, context, *args, **kwargs)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 271, in decorated_function
> amqp     e, sys.exc_info())
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 258, in decorated_function
> amqp     return function(self, context, *args, **kwargs)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 
> 3021, in resize_instance
> amqp     block_device_info)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/virt/libvirt/driver.py", 
> line 4439, in migrate_disk_and_power_off
> amqp     utils.execute('ssh', dest, 'mkdir', '-p', inst_base)
> amqp   File "/usr/lib/python2.7/dist-packages/nova/utils.py", line 177, in 
> execute
> amqp     return processutils.execute(*cmd, **kwargs)
> amqp   File 
> "/usr/lib/python2.7/dist-packages/nova/openstack/common/processutils.py", 
> line 178, in execute
> amqp     cmd=' '.join(cmd))
> amqp ProcessExecutionError: Unexpected error while running command.
> amqp Command: ssh 10.0.3.250 mkdir -p 
> /srv/nova/instances/36d06898-f11c-4888-87ff-e6d4406986b2
> amqp Exit code: 255

It might be related to Ubuntu giving the nova (and all other users)
/bin/false als login shell.

Any advice on that?

Greetings
-Sascha-

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