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2015-11-30 05:29:11 -0600 asked a question By using multiple compute flavors can we make the overcloud deployment faster ?

I'm trying to deploy an openstack overcloud via undercloud. I've total of 63 baremetal servers which am planning to deploy as part of my environment. I'm planning to have the overcloud controllers in HA, so 3 nodes are reserved for controllers. Remaining 60 hosts I was to deploy as compute nodes. After all introspection of nodes, I created a flavor by name control and compute and assigned it to respective nodes capability:profile. 'nova flavor-list' also shows up those 2 flavors. Next I went ahead and executed 'openstack overcloud deplpoy --templates --control-scale 3 --compute-scale <in increments="" of="" 5=""> --control-flavor control --compute-flavor compute -e <> '

in batches of 5 nodes per run. By the time I scaled up to 35 nodes, the overall execution time increased to 3 hours 30 mins. I've read that the default deployment timeouts set is 4 hours has part of heat stack. Along with that keystone token expiry time is also 4 hours. At this point if I go ahead and start the next batch of 5 nodes for deploy, its going to time out for sure. Could you please suggest how to reduce the over all deployment time ?

  • Will tagging the nodes with different different flavors and then deploying them separately, will it help ? If yes then could you please provide the deployment command in that case to be used ?
  • Will clearing all old and unused data of MySQL database can fasten the queries and there by speed up the deployment ? If yes, then will keystone-manage toke_flush command help here ?

Or is there any other good way to optimize the Openstack overcloud scale deployments ? Any help is highly appreciated ....

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2015-07-28 01:15:35 -0600 asked a question Glance image to base image mapping ?

Would like to know where exactly is the mapping done between the images uploaded to Glance and the corresponding image file that is downloaded to compute nodes under "/var/lib/nova/images/_base" when nova boot <> is used to instantiate a VM. I could see that under _base dir, there is a raw disk file getting created with HEX # as file names. And this image is used as base line image for all the new VM instances.

The info that I'm looking for is, how the the glance uploaded image and this _base image's are mapped when ever a new nova VM in launched so that only the first time the _base/ image is downloaded and later on its reused.

2015-07-17 01:21:11 -0600 commented question How to instantiate a VM using a pre existing virtual harddisk (.qcow2 format) with the help of nova

4) For the next testing cycle, I would need to reinstall or re-bring up the compute nodes (only) and get the VMs also back in the same state as how it was earlier. And all these VMs should be in sync with the Openstack controller.

2015-07-17 01:17:12 -0600 commented question How to instantiate a VM using a pre existing virtual harddisk (.qcow2 format) with the help of nova

1) Initially brought up an openstack controller nodes + compute nodes + network nodes. 2) Created networks + subnets + ports. 3) Created VMs on compute nodes using nova boot and port-ids.

2015-07-17 01:12:36 -0600 commented question How to instantiate a VM using a pre existing virtual harddisk (.qcow2 format) with the help of nova

Thanks Ranjit for your response. Let me put my requirements very clear so that I can get the right assistance. - Scale testing is what I'm trying to achieve using openstack. But the test setups would need to be brought up every day or every alternate days in a clean state.

2015-07-16 11:41:29 -0600 asked a question How to instantiate a VM using a pre existing virtual harddisk (.qcow2 format) with the help of nova

If I've few virtual hard disks in .qcow2 format which is placed in NFS, how do I instantiate them using nova. Let us say, the compute node is mounted with the NFS path and the .qcow2 image is accessible. My requirement is to bring up hundreds of VMs on a repetitive basis as and when required. By doing the above, I want to avoid creating a VM from scratch all the time. This will help me bring up hundreds of VM on a scale environment faster way. Virtual machine harddisk's will be available from NFS.