Cannot delete instances using "nova delete <instance id>"

asked 2015-11-25 15:20:29 -0600

toxickore gravatar image

updated 2015-11-25 19:30:28 -0600

smaffulli gravatar image

I'm creating instances on a kilo openstack release using the kilo ubuntu installation guide from openstack. One controller, one compute and one network node.

I can launch an instance from the dashboard, and then the instance have an ERROR status:

~# nova show 0dadc0d0-cf5e-492f-8896-deb907d80075 | grep status
| status                               | ERROR                                                                                                                                                                                                                                                               |

Since the image is still shown while doing a nova list, I'm trying to delete them.

~# nova list
| ID                                   | Name      | Status | Task State | Power State | Networks |
| 0dadc0d0-cf5e-492f-8896-deb907d80075 | example00 | ERROR  | -          | NOSTATE     |          |
| 19937fde-3a8a-410f-8b06-9c5fb3fc686c | example01 | ERROR  | -          | NOSTATE     |          |
| d3ab4faf-e888-4b4c-86a4-63e09248752b | example03 | ERROR  | -          | NOSTATE     |          |
| 38e7b547-fd5f-4b45-b0ab-2910b01e3e10 | example04 | ERROR  | -          | NOSTATE     |          |
~# nova delete 0dadc0d0-cf5e-492f-8896-deb907d80075
Request to delete server 0dadc0d0-cf5e-492f-8896-deb907d80075 has been accepted.

But the instance is still there after some minutes or hours. The nova show is giving me the following output:

| created                              | 2015-11-23T19:51:24Z                                                                                                                                                                                                                                                |
| fault                                | {"message": "Unable to establish connection to", "code": 500, "details": "  File \"/usr/lib/python2.7/dist-packages/nova/compute/\", line 349, in decorated_function |
|                                      |     return function(self, context, *args, **kwargs)                                                                                                                                                                                                                 |
|                                      |   File \"/usr/lib/python2.7/dist-packages/nova/compute/\", line 2768, in terminate_instance                                                                                                                                                               |
|                                      |     do_terminate_instance(instance, bdms)                                                                                                                                                                                                                           |
|                                      |   File \"/usr/lib/python2.7/dist-packages/oslo_concurrency/\", line 445, in inner                                                                                                                                                                       |
|                                      |     return f(*args, **kwargs)                                                                                                                                                                                                                                       |
|                                      |   File \"/usr/lib/python2.7/dist-packages/nova/compute/\", line 2766, in do_terminate_instance                                                                                                                                                            |
|                                      |     self._set_instance_error_state(context, instance)                                                                                                                                                                                                               |
|                                      |   File \"/usr/lib/python2.7/dist-packages/oslo_utils/\", line 85, in __exit__

What's the component I shall check for configuration? oviously is related with the line with Unable to establish connection to

Is this for nova?

Thanks in advance.

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answered 2015-11-25 21:50:32 -0600

Bipin gravatar image


Its neutron. API is not able to communicate with Neutron server. Make sure the neutron server is up and running

netstat -ntlp | grep 9696 in your controller node


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On the controller node # netstat -ntlp | grep 9696 tcp 0 0* LISTEN 39383/python How am I sure that the neutron server is running? I ran ps -ef | grep neutron and I have lots of processes related with neutron on the network node

toxickore gravatar imagetoxickore ( 2015-11-26 08:52:11 -0600 )edit

answered 2015-11-26 00:07:02 -0600

Prateek K gravatar image

As far as deletion is concerned you can delete an instance by changing its state. Neutron provides us a way to override the status of a VM to active and then delete it.

To do this run the command 'nova reset-state --active [UUID of VM]'. This will bring the VM state back to active and then you can easily delete them via nova delete command

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Its not the deletion issue, looks like an issue with Neutron. Better to trouble shoot that error before proceed.

Bipin gravatar imageBipin ( 2015-11-26 00:22:31 -0600 )edit

Actually the VMs never reachs the active state since they have an error before being launched.

toxickore gravatar imagetoxickore ( 2015-11-26 08:52:58 -0600 )edit

answered 2015-11-27 11:24:22 -0600

toxickore gravatar image

updated 2015-11-27 11:51:30 -0600

After checking my neutron configurations. I figured out that the [neutron] tag on my controller node /etc/nova/nova.conf was not specified. I had only the contents but not the tag. I have included the [neutron] tag and restarted the neutron services, the error changed but I think that's out of the scope of this question.

My guess is that nova was trying to use the default hostname for neutron since it was not defined.

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answered 2017-08-03 09:47:25 -0600

gaurav.mittal gravatar image

I am using the ocata on centos 7 and i am also getting the same error. Kindly help

[root@openstack ~(keystone_admin)]# nova list
| ID                                   | Name           | Status | Task State | Power State | Networks |
| 660b33fd-6f3f-4505-bba6-eccd35fe3e6e | vm1-dns-server | BUILD  | scheduling | NOSTATE     |          |
| 93cb7637-10f3-4dd9-b1b2-66f236fee6c6 | vm1-vid        | BUILD  | scheduling | NOSTATE     |          |
[root@openstack ~(keystone_admin)]# nova delete 660b33fd-6f3f-4505-bba6-eccd35fe3e6e
No server with a name or ID of '660b33fd-6f3f-4505-bba6-eccd35fe3e6e' exists.
ERROR (CommandError): Unable to delete the specified server(s).
[root@openstack ~(keystone_admin)]#

[root@openstack ~(keystone_admin)]# nova reset-state --active 660b33fd-6f3f-4505-bba6-eccd35fe3e6e
Reset state for server 660b33fd-6f3f-4505-bba6-eccd35fe3e6e failed: No server with a name or ID of '660b33fd-6f3f-4505-bba6-eccd35fe3e6e' exists.
ERROR (CommandError): Unable to reset the state for the specified server(s).
[root@openstack ~(keystone_admin)]#
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Hi Gaurav, please check in nova.conf file [neutron] header exists and ensure configurations are correct.

Praveen N gravatar imagePraveen N ( 2017-08-04 02:30:44 -0600 )edit

Yes that is existing and I have also verified the configuration and everything is OK.

gaurav.mittal gravatar imagegaurav.mittal ( 2017-08-04 02:49:05 -0600 )edit

answered 2017-08-04 07:02:40 -0600

Mohit gravatar image

Appears that it is attempting to catch neutron a the loopback ip address but you have mentioned that there is

One controller, one compute and one network node.

Unable to establish connection to

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Asked: 2015-11-25 15:20:29 -0600

Seen: 4,164 times

Last updated: Aug 04 '17