After reading through the documentation, my question is the order to
install.

Environment:
Two servers each with their own set of HDDs, each with a connection to
a SAN over FC.

Setup these two servers for xen in order to setup a clustered node (VM)
as stated in Novell Cluster ServicesTM 1.8.5 For Linux Administration
Guide, chapter 12. The clustered node (VM) would be setup on the SAN
HDDs. Therefore, the appearance is one server (VM) running from the SAN
which is clustered in the event of a xen host failure.

In order to do this, I presume there is a specific order to prep. (ie
setup the xen host servers first and have the xen running (ie change the
boot order for xen to load at startup), then install the OES2 addons (ie
clustering) on the xen hosts, then at that point setup the guest VM as a
clustered VM using the xen template.

Other questions:
On the xen host server, how should the partitions be setup? /boot as
ext2 and the system or /[root] with ext3/reiserfs or evms or lvm.
Should I leave a small amount of xen host server HDD space unpartitioned
for the special cluster partition for the Split-brain detector or should
I use a portion of the SAN HDDs?


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On Thu, 15 Jan 2009 17:06:02 +0000, wrichards wrote:

> After reading through the documentation, my question is the order to
> install.
>
> Environment:
> Two servers each with their own set of HDDs, each with a connection to a
> SAN over FC.
>
> Setup these two servers for xen in order to setup a clustered node (VM)
> as stated in Novell Cluster ServicesTM 1.8.5 For Linux Administration
> Guide, chapter 12. The clustered node (VM) would be setup on the SAN
> HDDs. Therefore, the appearance is one server (VM) running from the SAN
> which is clustered in the event of a xen host failure.
>
> In order to do this, I presume there is a specific order to prep. (ie
> setup the xen host servers first and have the xen running (ie change the
> boot order for xen to load at startup), then install the OES2 addons (ie
> clustering) on the xen hosts, then at that point setup the guest VM as a
> clustered VM using the xen template.
>
> Other questions:
> On the xen host server, how should the partitions be setup? /boot as
> ext2 and the system or /[root] with ext3/reiserfs or evms or lvm. Should
> I leave a small amount of xen host server HDD space unpartitioned for
> the special cluster partition for the Split-brain detector or should I
> use a portion of the SAN HDDs?
order is to install a minimal OES2 server 1st and then add the XEN kernel
module (as opposed to the other way around as you suggest)

Then I would use EXT2 for boot and EXT3 for the rest. NCS only supports
non virtualised resources or only virtualised resources but not mixed -
so the EXT3 side of life is just for boot purposes - no iManager, NSS or
stuff...

The SBD has to be on the Array (SAN) as does the OCFS2 partition that you
will host the XEN DomU Guests upon. If the VM is to hold data (MySQL -
file system - GroupWise - whatever) then the data should be held on a
dedicated LUN (outside the OCFS2 part) that is mounted as part of the VM

HTH

T



--

Tim Heywood NSC SysOp;1718141 Wrote:
> On Thu, 15 Jan 2009 17:06:02 +0000, wrichards wrote:
>
> order is to install a minimal OES2 server 1st and then add the XEN
> kernel
> module (as opposed to the other way around as you suggest)
>
> Then I would use EXT2 for boot and EXT3 for the rest. NCS only
> supports
> non virtualised resources or only virtualised resources but not mixed
> -
> so the EXT3 side of life is just for boot purposes - no iManager, NSS
> or
> stuff...
>
> The SBD has to be on the Array (SAN) as does the OCFS2 partition that
> you
> will host the XEN DomU Guests upon. If the VM is to hold data (MySQL
> -
> file system - GroupWise - whatever) then the data should be held on a
> dedicated LUN (outside the OCFS2 part) that is mounted as part of the
> VM
>
>

Thanks for your reply. Question: I take it then, setting up the OCFS2
partition is ONLY neccesary if, as explained in Chapter 12 of "Novell
Cluster ServicesTM 1.8.5 For Linux Administration Guide"

> ...In order for a live migration to function by using the XenLive
> template, you must do one of the
> following:
> 􀂊 Configure the OCFS2 file system on a shared disk system and
> copy the virtual machine configuration file to a directory on the file
> system. You also must ensure that all cluster nodes where the virtual
> machine will run have access to the OCFS2 file system on the shared disk
> system.

If I do not want to use the live migration templete because:

> ...The live migrate function is only useful for a manual virtual machine
> resource migration, and does not work for a virtual machine resource
> failover or failback.

I want there to be automatic failover/failback, then I do not need to
setup the OCFS2 partition.


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