Upgrade to XenServer 7.2

Since XenServer 7.2 is now available, we'll see how to upgrade.

Note: XenServer 7.1 is still in LTS. No emergency to upgrade on 7.2. Though, since it's a "small" revision, the risk to upgrade is low.

Xen Orchestra is 100% compatible with XenServer 7.2.

Download the ISO

You can find it here: http://downloadns.citrix.com.edgesuite.net/12636/XenServer-7.2.0-install-cd.iso

Install from USB

You can also burn a CD, but USB is in general faster and easier. On a Linux system, it's trivial:

dd if=XenServer-7.2.0-install-cd.iso of=/dev/sdX bs=8M status=progress oflag=direct

On Windows, use a dedicated program that can write ISO to USB drives.

Direct upgrade path

You can upgrade your previous XenServer version directly to 7.2 since XenServer 6.2, 6.5, 7.0 and 7.1.

Partitioning

It's exactly the same as all previous XenServer 7.x version (see our previous blog post: upgrade to XenServer 7.1):

• / (root) 18GB
• /boot/efi 512M
• /var/log 4GB
• Swap 1GB

Are you upgrading from an older version than XenServer 7.0? Or do you have the old partition scheme? Please follow instructions in our previous blog post to switch to the new one.

Rolling pool upgrade

If you have a pool with multiple hosts, there is some basic rules to follow:

Always upgrade the pool master first:

1. Migrate VMs from your pool master to slaves
2. Upgrade the pool master
3. Migrate VMs from one slave to the pool master
4. Migrate this slave
5. Etc.

You can always live migrate VMs from an older XenServer to a newer. The opposite IS NOT POSSIBLE.

Also, always check to empty your VM CD drives and disable HA during the operation.