Building Out XenServer 6.5 with USB Boot and Software RAID 10

[DustinB3403]

Without anyone outcrying (@scottalanmiller and @Romo) are we settled on providing the above process to configure mdadm on a USB XenServer?

[scottalanmiller]

Yes, just need to compile it into a step by step "one place" list.

[scottalanmiller]

And it would be handy to know what his device list was going to look like.

[dafyre]

And preferably test it as you go, lol.

[DustinB3403]

Does anyone know how to select the VM storage in xenserver, outside of the ISO installation process. We probably need that as well.

[scottalanmiller]

@dafyre said:

And preferably test it as you go, lol.

Testing is for wimps.

[Romo]

@DustinB3403 I am actually trying to do exactly that just right now on my test setup. It thought that with this command:
xe sr-create type=ext device-config:device=/dev/md10 shared=false host-uuid:fba59a9c7e6db5a2d21e40343b415cfd name-label="Array storage"

It would get added as local storage to xencenter, but I am getting this error :
The SR operation cannot be performed because a device underlying the SR is in use by the host.

Don't really know why, I haven't used xenserver before. Any ideas @scottalanmiller

[DustinB3403]

OK so without the specific target device I believe this command will work.

xe sr-create content-type=user type=ext device-config:device=/dev/cciss/c0d0p3 shared=false name-label="Local storage"

We simply need to determine his device path

[DustinB3403]

@Romo said:

@DustinB3403 I am actually trying to do exactly that just right now on my test setup. It thought that with this command:
xe sr-create type=ext device-config:device=/dev/md10 shared=false host-uuid:fba59a9c7e6db5a2d21e40343b415cfd name-label="Array storage"

It would get added as local storage to xencenter, but I am getting this error :
The SR operation cannot be performed because a device underlying the SR is in use by the host.

Don't really know why, I haven't used xenserver before. Any ideas @scottalanmiller

The reason your target device is in use is you have it mounted. Try dismounting the array and try again.

[DustinB3403]

Romo when you run

xe sr-list 

What's listed?

[Romo]

The array is now properly seen as storage in xencenter, I did have to unmount it first @DustinB3403

[DustinB3403]

What process did you run to unmount it.

[Romo]

umount /dev/md10

[DustinB3403]

So you ran

 umount /dev/md10

and then

xe sr-create type=ext device-config:device=/dev/md10 shared=false host-uuid:fba59a9c7e6db5a2d21e40343b415cfd name-label="Array storage"

Correct?

[Romo]

Yes, @DustinB3403 .

This is xe sr-list output with the array added as storage

[Romo]

@DustinB3403 sorry I did add content-type=user to the sr-create command. The final command was

xe sr-create type=ext device-config:device=/dev/md10 shared=false host-uuid:fba59a9c-7e6db5a2-d21e4034-3b415cfd content-type=user name-label="Array storage"

[DustinB3403]

OK so after saving the RAID Array (in my wall of text) he then would have to run

umount /dev/raid10

and then

xe sr-create type=ext device-config:device=/dev/raid10 shared=false host-uuid:<HOST-UUID> content-type=user name-label="Array storage"

[DustinB3403]

I'm guessing the system auto-mounted the array when you built it, and can now see it in XenCenter.

Correct?

[Romo]

It is automounting since we added it to our fstab

[Romo]

After adding the array as storage xenserver , the output of df -Th changes to this