Hi, I am using the ovirt-python-sdk to figure out if the host is idle or not. The way to determine if the host is idle at a given instant is finding out the number of VMs running on it. If the number of VMs = 0 implies host is idle.

I was exploring the python sdk to figure out Host-VMs mapping i.e What are the VMs running on the different host. Looks like the only way to find this, is to query each VM in /api/vms list to get the host on which it is running. Is this the right way ? Is there no direct query or REST API to list the VMs running on a given host at that instant. I was looking to get the data center hierarchy structure. Number_of_datacenters | V clusters in each data center | V Hosts in each cluster | V VMs on each host. This kind of mapping as seen on the GUI. Is there any way to obtain the same from the ovirt-python-sdk ? With this information, this would help me write scripts to turn-off my hosts if idle automatically and power them on as required. Regards, Deepthi _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users

On 06/25/2013 11:58 AM, Itamar Heim wrote: > On 06/25/2013 07:54 AM, Deepthi Dharwar wrote: >> Hi, >> >> I am using the ovirt-python-sdk to figure out if the host is idle or >> not. The way to determine if the host is idle at a given instant is >> finding out the number of VMs running on it. If the number of VMs = 0 >> implies host is idle. > > adding michael for the rest of the question, but please note to check > for SPM role of a host before assuming it is idle. Yes, that is essential. Thanks for pointing it out. > also, may i ask what you are trying to accomplish (it sounds like a > power saving policy)? Yes, I was looking to tweak the power saving policy to switch off hosts that have no VMs running on them. Looks like doing it within the ovirt-engine is better option than through scripts and SDK.

>> >> I was exploring the python sdk to figure out Host-VMs mapping i.e What >> are the VMs running on the different host. >> >> Looks like the only way to find this, is to query each VM in /api/vms >> list to get the host on which it is running. >> >> Is this the right way ? Is there no direct query or REST API to list >> the VMs running on a given host at that instant. >> >> I was looking to get the data center hierarchy structure. >> Number_of_datacenters >> | >> V >> clusters in each data center >> | >> V >> Hosts in each cluster >> | >> V >> VMs on each host. >> >> This kind of mapping as seen on the GUI. Is there any way to obtain >> the same from the ovirt-python-sdk ? >> >> With this information, this would help me write scripts to turn-off my >> hosts if idle automatically and power them on as required. >> >> Regards, >> Deepthi >> >> >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> > > >

On 06/25/2013 09:28 AM, Itamar Heim wrote: > On 06/25/2013 07:54 AM, Deepthi Dharwar wrote: >> Hi, >> >> I am using the ovirt-python-sdk to figure out if the host is idle or >> not. The way to determine if the host is idle at a given instant is >> finding out the number of VMs running on it. If the number of VMs = 0 >> implies host is idle. > > adding michael for the rest of the question, but please note to check for SPM role of a host before assuming it is idle. > > also, may i ask what you are trying to accomplish (it sounds like a power saving policy)? > >> >> I was exploring the python sdk to figure out Host-VMs mapping i.e What >> are the VMs running on the different host. >> >> Looks like the only way to find this, is to query each VM in /api/vms >> list to get the host on which it is running. >> >> Is this the right way ? Is there no direct query or REST API to list >> the VMs running on a given host at that instant. you can run query="host = X" for that. >> >> I was looking to get the data center hierarchy structure. >> Number_of_datacenters >> | >> V >> clusters in each data center >> | >> V >> Hosts in each cluster >> | >> V >> VMs on each host. >> >> This kind of mapping as seen on the GUI. Is there any way to obtain >> the same from the ovirt-python-sdk ? you can combine query to fetch vms by dc+cluster+host, query = "datacenter = x and cluster = y and host = z"

also you can fetch hosts from the given cluster cluster=x same for cluster "Datacenter.name = x" >> >> With this information, this would help me write scripts to turn-off my >> hosts if idle automatically and power them on as required. >> >> Regards, >> Deepthi >> >> >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> >