[Users] Fencing virtual machines
Hi, In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this? I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this. -- Nicolas Ecarnot
On Thu, 2013-11-07 at 15:03 +0100, Nicolas Ecarnot wrote:
Hi,
In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this?
I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this.
If you're using e.g. Red Hat Cluster there's a fence agent named fence_rhevm which can be used to fence virtual machines in RHEV or oVirt environments. Regards, René
On 11/07/2013 09:03 AM, Nicolas Ecarnot wrote:
Hi,
In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this?
I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this.
I haven't tried but the fence-agents package (fence-agents-rhevm on Fedora) has a fence_rhevm tool that will probably work for you.
----- Original Message -----
From: "Mike Burns" <mburns@redhat.com> To: "Nicolas Ecarnot" <nicolas@ecarnot.net>, users@ovirt.org Sent: Thursday, November 7, 2013 4:10:36 PM Subject: Re: [Users] Fencing virtual machines
On 11/07/2013 09:03 AM, Nicolas Ecarnot wrote:
Hi,
In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this?
I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this.
I haven't tried but the fence-agents package (fence-agents-rhevm on Fedora) has a fence_rhevm tool that will probably work for you.
Please let us know if that worked for you.
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Le 08/11/2013 08:23, Eli Mesika a écrit :
----- Original Message -----
From: "Mike Burns" <mburns@redhat.com> To: "Nicolas Ecarnot" <nicolas@ecarnot.net>, users@ovirt.org Sent: Thursday, November 7, 2013 4:10:36 PM Subject: Re: [Users] Fencing virtual machines
On 11/07/2013 09:03 AM, Nicolas Ecarnot wrote:
Hi,
In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this?
I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this.
I haven't tried but the fence-agents package (fence-agents-rhevm on Fedora) has a fence_rhevm tool that will probably work for you.
Please let us know if that worked for you.
Thank you all for your answer. I installed it and began to try to play with it, and it seems to be EXACTLY what I was looking for. It's still not clear for me to see what I have to install on the "stonith" targets - or who is eventually in charge of applying the kill action (the manager, one node, any node ?) but I promise I'm still reading and testing on my own. Thank you, have a nice day. -- Nicolas Ecarnot
On Fri, 2013-11-08 at 08:49 +0100, Nicolas Ecarnot wrote:
Le 08/11/2013 08:23, Eli Mesika a écrit :
----- Original Message -----
From: "Mike Burns" <mburns@redhat.com> To: "Nicolas Ecarnot" <nicolas@ecarnot.net>, users@ovirt.org Sent: Thursday, November 7, 2013 4:10:36 PM Subject: Re: [Users] Fencing virtual machines
On 11/07/2013 09:03 AM, Nicolas Ecarnot wrote:
Hi,
In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this?
I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this.
I haven't tried but the fence-agents package (fence-agents-rhevm on Fedora) has a fence_rhevm tool that will probably work for you.
Please let us know if that worked for you.
Thank you all for your answer. I installed it and began to try to play with it, and it seems to be EXACTLY what I was looking for.
It's still not clear for me to see what I have to install on the "stonith" targets - or who is eventually in charge of applying the kill action (the manager, one node, any node ?) but I promise I'm still reading and testing on my own.
Your vms are killed/restarted by ovirt-engine using the REST-API (on behalf of one of the cluster members of course). So you don't have to install anything except the fence-agents on all your cluster members (vms) and make sure they can reach port 443 (or 8443 depending on your setup) of ovirt-engine... Regards, René
Thank you, have a nice day.
Hi, I just wanted to thank you on this issue as my recent works with it were successful. Have a nice day. -- Nicolas Ecarnot Le 08/11/2013 09:43, René Koch (ovido) a écrit :
On Fri, 2013-11-08 at 08:49 +0100, Nicolas Ecarnot wrote:
Le 08/11/2013 08:23, Eli Mesika a écrit :
----- Original Message -----
From: "Mike Burns" <mburns@redhat.com> To: "Nicolas Ecarnot" <nicolas@ecarnot.net>, users@ovirt.org Sent: Thursday, November 7, 2013 4:10:36 PM Subject: Re: [Users] Fencing virtual machines
On 11/07/2013 09:03 AM, Nicolas Ecarnot wrote:
Hi,
In the case I want to setup a virtual cluster amongst many virtual machines, and this virtual cluster needs to fence some VM, what is the best way to achieve this?
I guess this has to use something like vdsClient to "unplug" the VM, but I found it hard to find any more information about this.
I haven't tried but the fence-agents package (fence-agents-rhevm on Fedora) has a fence_rhevm tool that will probably work for you.
Please let us know if that worked for you.
Thank you all for your answer. I installed it and began to try to play with it, and it seems to be EXACTLY what I was looking for.
It's still not clear for me to see what I have to install on the "stonith" targets - or who is eventually in charge of applying the kill action (the manager, one node, any node ?) but I promise I'm still reading and testing on my own.
Your vms are killed/restarted by ovirt-engine using the REST-API (on behalf of one of the cluster members of course). So you don't have to install anything except the fence-agents on all your cluster members (vms) and make sure they can reach port 443 (or 8443 depending on your setup) of ovirt-engine...
Regards, René
Thank you, have a nice day.
-- Nicolas Ecarnot
participants (4)
-
Eli Mesika -
Mike Burns -
Nicolas Ecarnot -
René Koch (ovido)