<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:dt="uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=DE-CH link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hey guys,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’m playing aroung with the openstack api and I’m trying to change the flavor of an instance. Thanks to the documentation I found the necessary information to write the api call, which was done pretty fast and easy. <span lang=FR-CH>Sadly the api call has a secondary effect because after the execution of the api call the instance changes into the error state.<o:p></o:p></span></p><p class=MsoNormal><span lang=FR-CH><o:p> </o:p></span></p><p class=MsoNormal>I had a look into the nova-compute.log and this is what I found :<o:p></o:p></p><p class=MsoNormal><i><span lang=FR-CH>root@nova-controller:/etc/nova# tail -n20 /var/log/nova/nova-compute.log <o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>2012-05-02 14:47:18,887 DEBUG nova.rpc [-] unpacked context: {'user_id': u'nodermatt', 'roles': [u'Admin'], 'timestamp': u'2012-05-02T14:47:18.558838', 'auth_token': u'be66c633-9a8d-47eb-a095-9b653375b138', 'msg_id': None, 'remote_address': u'192.168.7.106', 'strategy': u'keystone', 'is_admin': True, 'request_id': u'744129f2-17d9-4756-a276-548ad6dfe975', 'project_id': u'2', 'read_deleted': False} from (pid=1496) _unpack_context /var/lib/nova/nova/rpc/impl_kombu.py:646<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>2012-05-02 14:47:18,888 INFO nova.compute.manager [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] check_instance_lock: decorating: |<function prep_resize at 0x253ecf8>|<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>2012-05-02 14:47:18,889 INFO nova.compute.manager [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] check_instance_lock: arguments: |<nova.compute.manager.ComputeManager object at 0x1d85e10>| |<nova.rpc.impl_kombu.RpcContext object at 0x3cc1c90>| |ff8f4521-fbc2-45e3-91ac-de395a7a1331|<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>2012-05-02 14:47:18,889 DEBUG nova.compute.manager [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] instance ff8f4521-fbc2-45e3-91ac-de395a7a1331: getting locked state from (pid=1496) get_lock /var/lib/nova/nova/compute/manager.py:1199<o:p></o:p></span></i></p><p class=MsoNormal><i>2012-05-02 14:47:18,946 INFO nova.compute.manager [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] check_instance_lock: locked: |False|<o:p></o:p></i></p><p class=MsoNormal><i>2012-05-02 14:47:18,946 INFO nova.compute.manager [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] check_instance_lock: admin: |True|<o:p></o:p></i></p><p class=MsoNormal><i>2012-05-02 14:47:18,946 INFO nova.compute.manager [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] check_instance_lock: executing: |<function prep_resize at 0x253ecf8>|<o:p></o:p></i></p><p class=MsoNormal><i>2012-05-02 14:47:19,124 ERROR nova.rpc [744129f2-17d9-4756-a276-548ad6dfe975 nodermatt 2] Exception during message handling<o:p></o:p></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: Traceback (most recent call last):<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: File "/var/lib/nova/nova/rpc/impl_kombu.py", line 620, in _process_data<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: rval = node_func(context=ctxt, **node_args)<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: File "/var/lib/nova/nova/exception.py", line 100, in wrapped<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: return f(*args, **kw)<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: File "/var/lib/nova/nova/compute/manager.py", line 118, in decorated_function<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: function(self, context, instance_id, *args, **kwargs)<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: File "/var/lib/nova/nova/compute/manager.py", line 965, in prep_resize<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH>(nova.rpc): TRACE: raise exception.Error(msg)<o:p></o:p></span></i></p><p class=MsoNormal><i><span lang=FR-CH style='color:red'>(nova.rpc): TRACE: Error: Migration error: destination same as source!<o:p></o:p></span></i></p><p class=MsoNormal><i>(nova.rpc): TRACE: <o:p></o:p></i></p><p class=MsoNormal><i>2012-05-02 14:48:00,294 INFO nova.compute.manager [28207266-3917-4c91-b0d8-4afa36f7c018 None None] Updating host status<o:p></o:p></i></p><p class=MsoNormal><i><o:p> </o:p></i></p><p class=MsoNormal><span lang=FR-CH>Also a thread on the openstack forum and a bug on launchpad raised my curiosity.<o:p></o:p></span></p><p class=MsoNormal>Forum thread : http://forums.openstack.org/viewtopic.php?f=10&t=693<o:p></o:p></p><p class=MsoNormal>Launchpad: <a href="https://lists.launchpad.net/openstack/msg05540.html">https://lists.launchpad.net/openstack/msg05540.html</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>For the record here is the code:<o:p></o:p></p><p class=MsoNormal><i>curl -v -H "X-Auth-Token:4963437d-0a6a-4302-a4ff-f3be191fbc1d" http://192.168.7.211:8774/v1.1/2/servers/3/action -d '{"resize" : {"flavorRef" : "2"}}' -H 'Content-type:application/json' | python -m json.tool<o:p></o:p></i></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The machine, on which I am working, is a single node stackops deployment.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Does someone has an idea what may be the cause of the error?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Have a good day,<o:p></o:p></p><p class=MsoNormal>Nicolas<o:p></o:p></p></div></body></html>