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Nova instance not accessible after OS update and reboot

asked 2014-01-11 02:47:24 -0500

Clarence gravatar image

I am running Openstack Havana release on CentOS 6.5. And have 2 servers (1 controller, and 1 compute node). On the compute node, I created an instance (also running CentOS 6.5). The instance was running fine for some time.

However, one day after I perform OS update (running the yum update command) on both the instance, compute node and controller, and reboot, I found that I am not able to access the instance anymore. From command line and dashboard, everything seems normal, I can see my instance, start it, and the status shows "running".

What I did was follows: - OS update on the instance (yum update), and then shutdown the instance in dashboard - OS update on the compute node (yum update), and then reboot the compute node - OS update on the controller node (yum update), and then reboot the controller node

After I did the above, I check both nodes and find all openstack services are running normally. Then I login to dashboard and start my instance, and the instance started normally as shown in the dashboard.

However, I found that I am not able to ping the machine, so no way to login to the machine. I go to the instance folder and the console-log file is empty. I use nova reboot and still not able to access the machine.

I tried to launch a new instance and everything works. I can ping the new instance and login to it. I tried to browse through all the log files as mentioned in the operation guide but still don't know how to identify the problem.

I am quite new to Openstack, can someone advice me on how to troubleshoot my instance. What I want to do first is to able to see whether the instance was really booted successfully or not.

Thanks a lot in advance Clarence

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On the compute node, can you confirm that the instance is actually running if you do a "virsh list"?

jtopjian gravatar imagejtopjian ( 2014-01-11 07:13:21 -0500 )edit

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answered 2014-01-14 18:52:27 -0500

Clarence gravatar image

Thanks a lot for your response.

I did checked and the following is the outcome of the virsh list command:

Id Name State

7 instance-00000027 running 8 instance-00000028 running

The instance having problem is 27. I also tried to suspend and resume the instance and still no luck.

Any further advice will be much welcome.


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Can you try doing "nova reboot --hard <instance id="">"?

jtopjian gravatar imagejtopjian ( 2014-01-15 03:29:32 -0500 )edit

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Asked: 2014-01-11 02:47:24 -0500

Seen: 371 times

Last updated: Jan 14 '14