Re: [Libvirt-cim] Query regarding Xen_ComputerSystem.RequestStateChange() and Live migration
Subba Rao, Sandeep M (STSD) wrote:
Hi Kaitlin,
Hope you are doing fine.
We need a clarification regarding the CIM_ConcereteJob support part of
Xen_ComputerSystem.RequestStateChange() method to start or stop a Virtual Machine. After
we invoke the method, we were expecting a return value of 4096 (Operation Scheduled) with
the reference to Job to track the status.
AFAIK, the method would not return 4096, it would return success or
failure only.
Instead we are noticing that the method returns 0 - indicating
success, however the Virtual machine does not stop because of memory or other errors.
Can you elaborate on what operation you are doing here ?
What errors are you seeing ?
Can you clarify whether this is a known issue in libvirt-CIM? Also
recommend how to track the invoked job?
Once the RqquestedStateChange() is successful you should be able to see
the new state value in the Xen_ComputerSystem.EnabledState.
The OS is an RHEL 5.4 and the libvirt and xen versions are as
follows:
[root@RHEL54 ~]# cat /etc/issue
Red Hat Enterprise Linux Server release 5.4 Beta (Tikanga)
Kernel \r on an \m
[root@RHEL54 ~]# uname -a
Linux RHEL54 2.6.18-160.el5xen #1 SMP Mon Jul 27 18:01:58 EDT 2009 i686 i686 i386
GNU/Linux
[root@RHEL54 ~]# rpm -qa | grep libvirt
libvirt-0.6.3-17.el5
libvirt-cim-0.5.5-2.el5
libvirt-python-0.6.3-17.el5
[root@RHEL54 ~]# rpm -qa | grep xen
kernel-xen-devel-2.6.18-160.el5
kernel-xen-2.6.18-160.el5
xen-3.0.3-92.el5
xen-libs-3.0.3-92.el5
[root@RHEL54 ~]# rpm -qa | grep sblim
sblim-cmpi-base-1.5.5-34.el5
[root@RHEL54 ~]#
We also need clarification for live migration. We notice that Xen_ComputerSystem instance
for the Virtual machine which is live migrated is being reported on the source and target
host. Can you clarify us how to determine the actual host where the VM is associated? We
were hoping that HostedDependency association will be helpful, but did not work.
Once the live migration of the guest using libvirt-cim is successful you
should not see any information of the VM on the host.
I dont think there is any means from which you can track information
regarding the source from which the guest was migrated using libivrt-cim
providers.
Xen_HostedDependency will give information of the VM's the particular
Server hosts.
Appreciate any help in this regard.
Sandeep
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Thanks and Regards,
Deepti B. Kalakeri
IBM Linux Technology Center
deeptik(a)linux.vnet.ibm.com