[Linux-cluster] hwo to build a virtual FC-san environment

[Pasi Kärkkäinen]

On Thu, Oct 15, 2009 at 10:25:36PM +0800, Bai Shuwei wrote:
>    Pasi and Rafael:
>    Â Â Â  Thanks first.
>    Â Â Â  My purpose is to build a SAN environment which can support
>    multipath. I should use the linux environment. So I think the vmware can
>    meet my requirement.
>    Â Â Â  But I know little on multipath, from the redhat document, the HBA,
>    fabric switch are needed. So I want to use the normal source to
>    build/emulator the multpath environment.
> 

Well, again about iSCSI.. you could set up iSCSI target (server) and
configure two (virtual) NICs to it, and give both NICs IP addresses from
different subnets. Then share some image file as LUN.

Then set up the vms (initiators) that will access the SAN, and configure
two (virtual) nics to those aswell, for storage access. Again configure
the NICs to be in different subnets.

Then log into the iSCSI target using both NICs and use multipath on top
of the the two LUNs.

-- Pasi

>    Best Regards!
> 
>    On Thu, Oct 15, 2009 at 10:12 PM, Rafael Micó Miranda
>    <[1]rmicmirregs at gmail.com> wrote:
> 
>      Hi Bai
> 
>      El jue, 15-10-2009 a las 13:22 +0300, Pasi KÀrkkÀinen escribió:
>      > On Tue, Oct 13, 2009 at 05:57:42PM +0800, Bai Shuwei wrote:
>      > > Â  Â All:
>      > > Â  Â Ã* Ã* Ã* Â I want to build a viratual FC-SAN environment for
>      learning. But I
>      > > Â  Â don't know whether there are some useful documents and tools
>      for it.
>      > > Â  Â Hoping get you help on it.
>      >
>      > I don't know if you can do 'virtual FC'.
>      >
>      > I'd recommend you to use iSCSI. Easy to configure and setup without
>      any
>      > special hardware.
>      >
>      > -- Pasi
>      >
>      > --
>      > Linux-cluster mailing list
>      > [2]Linux-cluster at redhat.com
>      > [3]https://www.redhat.com/mailman/listinfo/linux-cluster
> 
>      I understand that you need a "shared storage from a SAN" to be used by a
>      group of virtual machines, don't you?
> 
>      In the past I had an VMWare ESX "Virtual FC-SAN" for the purpose of
>      developing and testing cluster solutions.
> 
>      The way i managed that was, more or less (I cant get access to the
>      documentation right now), using a real SAN LUN in VMWare and offering it
>      to several virtual machines as a RAW device, so the same device could be
>      reachable by all VMs at the same time. I think there was also something
>      to do with the NPIV of the ESX servers, but I can't remember it clearly.
> 
>      The VMs were not aware of the device being on a SAN, but at least it was
>      a way to have the same SCSI device in several VMs at the same time, so
>      you can try things as GFS or shared storage clusters.
> 
>      I'm sorry the only proposal is using VMWare, maybe someone can propose
>      more solutions.
> 
>      Cheers,
> 
>      --
>      Rafael Micó Miranda
>      --
>      Linux-cluster mailing list
>      [4]Linux-cluster at redhat.com
>      [5]https://www.redhat.com/mailman/listinfo/linux-cluster
> 
>    --
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> 
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>    E-Mail: [7]baishuwei at gmail.com
> 
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