Cinder

How can i get the "location" of the volume created

Asked by Senhua Huang

I have a deployment of 4 compute hosts, which run both compute and volume service. I am trying to determine the identity of the host(s) on which a volume is created. Basically, after I create a volume, I want to know where among the 4 hosts the volume is located. Thanks!

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Mike Perez (thingee) said : 		#1

Doing a call to cinder rest api of either of the following:

1) Show details of a volume http://docs.openstack.org/api/openstack-block-storage/2.0/content/Show_Volume.html
2) List details of all volumes http://docs.openstack.org/api/openstack-block-storage/2.0/content/List_Volumes_Details.html

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Shanthakumar K (shantha-kumar) said : 		#2

If you are provisioning the LVm volume, below mentioned is best way for you

You can find information in "cinder-scheduler log"

1. Filtered host will give you information

---> [host 'grzrc3@driver-2': free_capacity_gb: 54]

PS: I your case, u need to get all the host in above filter.

2. Choosing Weighedhost will choose the best host for provision volume

---> Choosing WeighedHost [host: grzrc3@driver-2, weight: 54.0]

2013-05-14 09:56:17 DEBUG [cinder.scheduler.filter_scheduler] Filtered [host 'grzrc3@driver-2': free_capacity_gb: 54]
2013-05-14 09:56:17 DEBUG [cinder.scheduler.filter_scheduler] Choosing WeighedHost [host: grzrc3@driver-2, weight: 54.0]

Hope this would resolve you query.

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