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how to create VM instances on compute node

asked 2015-01-14 01:54:30 -0500

HK gravatar image

openstack installed using packstack..compute and controller node are installed on two different machines.

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VM instances are always created on compute node(the node in which nova-compute service is running)

Refer to link

teju gravatar imageteju ( 2015-01-14 02:01:55 -0500 )edit

thank you for ur rply,...Can u plz tell the procedure to create VM on compute node.

HK gravatar imageHK ( 2015-01-14 03:09:18 -0500 )edit

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answered 2015-01-14 12:44:11 -0500

GLaupre gravatar image

updated 2015-01-14 12:47:47 -0500

Hello HK,

If you have horizon installed, you can create an instance using the dashboard. You have to choose the flavor, which is the size, and you have to determine which image you want to have on your instance. I recommend you to look at this: and this to choose the correct parameters:

If you have more specific question, edit your post.

Hope you can continue with that

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Hello GLaupre,

I want to migrate vm's from one compute host to another. But i am getting the following error. Can u pls suggestion a solution for the same.

HK gravatar imageHK ( 2015-03-13 13:25:40 -0500 )edit

Error: Failed to launch instance "XYZ": Please try again later [Error: Unexpected error while running command. Command: ssh 172.16.32.* mkdir -p /var/lib/nova/instances/520c189a-d14d-4e31-8364-2f88648d7089 Exit code: 255 Stdout: u'' Stderr: u'Host key verification failed.\r\n'].

HK gravatar imageHK ( 2015-03-13 13:25:48 -0500 )edit

It seems that you have a ssh problem. Try to verify simply if you can ssh your new host. Maybe there is a conflict with the ssh key.

GLaupre gravatar imageGLaupre ( 2015-03-16 19:33:52 -0500 )edit

What exactly do you mean by new host ? Is it my compute node in the Openstack compute-controller architecture. I am able to ssh my compute node from the controller node but get the below warning: Warning: Permanently added '172.16.32.*' (ECDSA) to the list of known hosts.

HK gravatar imageHK ( 2015-03-17 00:15:09 -0500 )edit

Yes, it seems like an ssh error. Can u suggest how this can be resolved ?

HK gravatar imageHK ( 2015-03-17 04:56:32 -0500 )edit

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Asked: 2015-01-14 01:54:30 -0500

Seen: 728 times

Last updated: Jan 14 '15