Hi, I was trying to explore more about fencing option supported in ovirt. But getting lost in documents. My requirement is to fence at VM level rather than host level. e.g let assume VM1.1, VM1.2,VM1.3 are running on host1 and VM2.1,VM2.2 VM2.3 running on host2. Suppose due to some error only VM1.1 goes down [Note: VM1.2 and VM1.3 in running state] then VM2.1 must come up. Can I get to know whether such functionality is supported by ovirt ? If yes, would you please explain also how it work or would you share refernece for me to refer and understand it ? if yes, is it configurable by python sdk ? Thanks, ~Rohit
On Wed, Dec 14, 2016 at 9:02 AM, TranceWorldLogic . <tranceworldlogic@gmail.com> wrote:
Hi,
I was trying to explore more about fencing option supported in ovirt. But getting lost in documents.
My requirement is to fence at VM level rather than host level. e.g let assume VM1.1, VM1.2,VM1.3 are running on host1 and VM2.1,VM2.2 VM2.3 running on host2. Suppose due to some error only VM1.1 goes down [Note: VM1.2 and VM1.3 in running state] then VM2.1 must come up.
Can I get to know whether such functionality is supported by ovirt ? If yes, would you please explain also how it work or would you share refernece for me to refer and understand it ? if yes, is it configurable by python sdk ?
Fencing in the VM level is not available yet, but will be possible once we have vm-leases: https://www.ovirt.org/develop/release-management/features/storage/vm-leases/ On top of this, we will support automatic failover of vms: https://github.com/oVirt/ovirt-site/pull/586/commits/77669161397ebf4cc15c66e... This should be available in 4.1, currently blocked by libvirt bug: https://bugzilla.redhat.com/1403691 Once a vm has a lease, you can revoke the lease from another host, causing sanlock on the original host to terminate the vm using sanlock_request() api. When this will be implemented, we can expose this via the REST API and the SDK. Nir
Thanks, ~Rohit
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On Wed, Dec 14, 2016 at 10:35 AM, Nir Soffer <nsoffer@redhat.com> wrote:
On Wed, Dec 14, 2016 at 9:02 AM, TranceWorldLogic . <tranceworldlogic@gmail.com> wrote:
Hi,
I was trying to explore more about fencing option supported in ovirt. But getting lost in documents.
My requirement is to fence at VM level rather than host level. e.g let assume VM1.1, VM1.2,VM1.3 are running on host1 and VM2.1,VM2.2 VM2.3 running on host2. Suppose due to some error only VM1.1 goes down [Note: VM1.2 and VM1.3 in running state] then VM2.1 must come up.
Can I get to know whether such functionality is supported by ovirt ? If yes, would you please explain also how it work or would you share refernece for me to refer and understand it ? if yes, is it configurable by python sdk ?
Fencing in the VM level is not available yet, but will be possible
If the intention is to fence a VM because an external HA cluster controls it, this is possible using fence_rhevm[1], which is part of the fence-agents package. Note that it currently has a bug[2] which means it's currently not working with 4.0 (but it's an easy fix). Y. [1] https://github.com/ClusterLabs/fence-agents/blob/master/fence/agents/rhevm/f... [2] https://bugzilla.redhat.com/show_bug.cgi?id=1402860
once we have vm-leases: https://www.ovirt.org/develop/release-management/features/ storage/vm-leases/
On top of this, we will support automatic failover of vms: https://github.com/oVirt/ovirt-site/pull/586/commits/ 77669161397ebf4cc15c66e0e6876bc033384cfc
This should be available in 4.1, currently blocked by libvirt bug: https://bugzilla.redhat.com/1403691
Once a vm has a lease, you can revoke the lease from another host, causing sanlock on the original host to terminate the vm using sanlock_request() api.
When this will be implemented, we can expose this via the REST API and the SDK.
Nir
Thanks, ~Rohit
_______________________________________________ Users mailing list Users@ovirt.org http://lists.phx.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.phx.ovirt.org/mailman/listinfo/users
participants (3)
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Nir Soffer -
TranceWorldLogic . -
Yaniv Kaul