Friday, January 16, 2015

Migrate from XenServer 6.2 to 6.5 [feedly]



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Migrate from XenServer 6.2 to 6.5
// Xen Orchestra

Since XenServer 6.5 is out, you can start to migrate your existing installations of 6.2

You'll see, it's very easy, and without any services interruption!

Pre-flight check

We'll use a real example of our Lab migration from 6.2 to 6.5. Here is the overview:

As you can see, we've got a Lab Pool with two hosts (lab1 and lab2).

First, you need to disable High-Availability if any, with a xe pool-ha-disable for example.

To do a proper upgrade, you need to start with the current pool master. Migrate all its running VM to other hosts on the pool, two steps:

1/ Select automatically all VM on lab1 (which is the pool master):

2/ Click on migrate on lab2:

Done! Migration started:

And finished:

lab1 is clear to go for an upgrade!

If you need to migrate to another pool or a host without any shared storage, consider using Xen Storage Motion, or move the VDI to a shared SR. Another possibility: put your VM in a suspend state.

Upgrade process

The upgrade process is very easy (nice job guys!): put the CD, restart your host and boot on the CDROM drive (you have also other possibilities, like HTTP install etc.). The installer will ask to Upgrade from your existing version, or to Reinstall. As you may think, choose Upgrade from XenServer 6.2.

Nothing special to see here, the installer will take time to do things nicely (5/10 minutes), because:

  • you won't lost any configuration (configured SR in iSCSI, NFS or whatever)
  • it worked out of the box

Finally, when the installer ask, remove the CD and reboot. You're done!

Without any interruption

Well, now you have to do live migrations exactly in the other way, from lab2 (with XenServer 6.2) to lab1 (with XenServer 6.5). Piece of cake:

Migration is done, lab2 is empty, ready to be upgraded:

After the upgrade and the reboot, your pool is finally operation with XenServer 6.5!

Conclusion

You can perform a complete pool migration from 6.2 to 6.5 without any VM shutdown! No excuses, do it ;) The team behind XenServer made a fantastic job with their simple installer. We'll see tomorrow the new bits and why this release is great.


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Todd Pigram

Data Center Engineer  

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