====== XenServer Migration Issues ======

http://searchservervirtualization.techtarget.com/tip/How-to-configure-Citrix-XenServer-live-migration

http://support.citrix.com/servlet/KbServlet/download/27046-102-666250/XS-design-network_advanced.pdf

http://opentodo.net/2012/10/xenserver-ha-live-migration/

===== VM Live Migration =====

  * Live migration is a free feature
  * No need for an additional purchase
  * Virtual disk of the VM being migrated has to be on shared storage
  * You must have installed the Xen Tools package in the VM

===== Storage Live Migration =====

:!: I haven't had much luck with storage live migration yet.

http://www.citrix.com/content/dam/citrix/en_us/documents/products-solutions/storage-xenmotion-live-storage-migration-with-citrix-xenserver.pdf

===== Migration to a New Pool =====

See also **[[computing:linux:ssh_keys|Set Up SSH Keys]]**

https://techblog.jeppson.org/2016/06/quickly-transfer-vms-xenserver-pools/

:!: In the following commands, it is **necessary to configure SSH keys** for password-less access (one direction) prior.

Using these commands, VMs are transferred (actually, exported and imported) directly from one 'source pool' member, over a secure SSH connection using the Management network, to a 'destination pool' member.

This process will **monopolize Management network bandwidth** for a good long while, affecting/affected by all other Management network traffic for the duration of the transfers.

Exporting, then importing will **flatten (coalesce) all VHD chains** in the process...a wonderful thing.

==== Transfer a VM from One Pool to Another ====

:!: VMs must be **shut down** before transferring with these commands.

:!: Add ''sr-uuid=<desired-sr-uuid>'' to ''vm-import'' to specify the **destination SR**.  Alternately, just set the desired destination SR as the pool Default SR using XenCenter.

CLI example, as ''root'' at the 'sender' console:

<file>
xe vm-export uuid=<vm-uuid> filename= | ssh root@<ip-of-new-server> xe vm-import filename=/dev/stdin
</file>

==== Transfer Two VMs from One Pool to Another ====

<file>
xe vm-export uuid=<vm-uuid> filename= | ssh root@<ip-of-new-server> xe vm-import filename=/dev/stdin && xe vm-export uuid=<vm-uuid> filename= | ssh root@<ip-of-new-server> xe vm-import filename=/dev/stdin
</file>

==== Transfer a Template and a VM from One Pool to Another ====

<file>
xe template-export template-uuid=<template-uuid> filename= | ssh root@<ip-of-new-server> xe vm-import filename=/dev/stdin && xe vm-export uuid=<vm-uuid> filename= | ssh root@<ip-of-new-server> xe vm-import filename=/dev/stdin
</file>

===== Export/Import to/from Mounted Storage =====

<file>
xe vm-export vm="Name of VM" filename="/mount/point/Name Of VM.xva"

xe vm-import filename="/mount/point/Name Of VM.ova" sr-uuid=<UUID of storage repository to place import> host-username=root host-password=>password of xenserver>
</file>