[one-users] How to get VM info based on Host Name from ONE Server ?

[Ruben S. Montero]

Hi,
	There is a no direct solution for this. A hostname is VM related data, and 
ONE tries to be OS agnostic, i.e. ONE does not have any clue about the OS you 
are running and how to get the hostname from it. Note that once the VM is 
running you can log in the VM and change its hostname. There are some efforts 
by the hypervisor community to provide an interface to inspect a running VM, 
so  you can get that kind of data.

There are some workarounds that may work for you, though:

* If you know the hostname beforehand, just include it in the VM template. 
Here you have to options: (i) use the NAME attribute to be equal to the VM 
hostname, then you can just use `onevm show <hostname>`; or (ii) add a new 
attribute with the value you want to add, i.e. HOSTNAME=myhost.com, then you 
can query the DB by this new attribute. Note that this last approach is 
generic and you can tag your VMs with any attribute as they are stored in the 
Template DB.

* If you are using the ONE network manager, or DHCP, you can query the DB by 
the NIC attribute (if you can transform a hostname to a MAC or IP address).

Cheers

Ruben

On Friday 16 January 2009 15:20:20 lalithamba.vishwanathaiah at wipro.com wrote:
> Hi,
>
> My requirement is  :
>      User is giving a hostname and based on the hostname, I need to show
> the VM Info.
>
> Currently in ONE implementation, one.vmget_info returns the information,
> but it does not give the hostname.
> =-=============================================
> VID            : 7
> UID            : 0
> STATE          : PENDING
> LCM STATE      : LCM_INIT
> DEPLOY ID      :
> MEMORY         : 0
> CPU            : 0
> LAST POLL      : 0
> START TIME     : 01/15 14:04:57
> STOP TIME      : 01/01 05:30:00
> NET TX         : 0
> NET RX         : 0
> ....: Template :....
>     CPU             : 0.5
>     DISK            :
> READONLY=no,SOURCE=/home/wipro/vm-image/disk0,TARGET=sda4 DISK            :
> SIZE=1024,TARGET=sdb,TYPE=swap
>     MEMORY          : 128
>     NAME            : nodevm
>     NIC             : BRIDGE=eth0",MAC=00:03:0D:AD:D4:76
>     OS              : INITRD=/boot/initrd-2.6.2
> 5.18-0.2.xen,KERNEL=/boot/vmlinuz-2.6.25.18-0.2-xen,ROOT=sda4
> =-=============================================
>
> Is there any other way to get the details ?
>
> Thanks and Regards,
> Lalithamba.
>
>
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-- 
+---------------------------------------------------------------+
 Dr. Ruben Santiago Montero
 Associate Professor
 Distributed System Architecture Group (http://dsa-research.org)

 URL:    http://dsa-research.org/doku.php?id=people:ruben
 Weblog: http://blog.dsa-research.org/?author=7
             
 GridWay, http://www.gridway.org
 OpenNEbula, http://www.opennebula.org
+---------------------------------------------------------------+