HP Integrity Virtual Machines Manager 4.1 Software: User Guide

Virtual Machines tab. From tabs that list and allow selection of multiple virtual machines, you
can simultaneously delete multiple virtual machines that are selected.
NOTE: Before deleting a virtual machine, you must first stop the virtual machine (put it in the
Off state). For instructions, see the section “Stopping virtual machines” (page 96).
Deleting a virtual machine removes the configuration definition for a virtual machine and frees
any resources assigned to the virtual machine, making the resources available to be assigned to
other virtual machines. Deleting a virtual machine does not delete files and data residing on the
virtual storage or backing storage that was assigned to the virtual machine.
By default, vswitch VLAN port assignments are removed when the virtual machine is deleted.
If any of the ports are connected to other virtual machines that are not being removed, those port
assignments are not removed. Clearing the Remove VLAN Assignment check box causes vswitch
VLAN port assignments to remain after the virtual machine is deleted.
NOTE: You cannot delete a virtual machine that is currently migrating online. You must wait
until migration completes.
NOTE: Using VM Manager with Insight Dynamics - VSE for Integrity, if you create a virtual
machine and then delete it before the new virtual machine has been identified by HP SIM, the
virtual machine might appear in Virtualization Manager as though it had not been deleted. The
appearance of the virtual machine in Virtualization Manager depends on when the deletion
occurred during the HP SIM identification process. In addition, if you decide to delete the virtual
machine soon after creating it, wait a few minutes before doing so. If the deleted virtual machine
does appear in Virtualization Manager, delete it from the HP SIM All System view. (From the
HP SIM Systems and Event Collections list in the navigation area on the left, select All
Systems.) For more information, see the HP Insight Virtualization Manager 6.0 Software with Logical
Server Management: User Guide.
This is not an issue when using VM Manager from HP SMH.
Migrating virtual machines
Overview
This topic presents an overview of virtual machine migration and of the Migrate Virtual Machine
wizard that allows you to set up and initiate migration of virtual machines from your VM
Manager's VM Host (the migration source) to another VM Host (the migration target).
The wizard allows you to perform either online or offline migration:
• Online migration migrates a virtual machine that is running, moving the guest OS and
applications without disrupting service. All guest I/O connections to network and storage
devices remain active throughout the migration, and the guest OS and its applications
continue operating without requiring a reboot or application restart.
• Offline migration migrates the configuration of a virtual machine that is not running.
Some of the most common reasons for migrating virtual machines online include the need to:
• Vacate the source VM Host system for maintenance purposes without disrupting services
• Perform a rolling upgrade of a VM Host, moving its running guests to another VM Host,
upgrading the VM Host, then moving the guests back
• Populate a new VM Host with one or more virtual machines already configured and tested
on the source
• Move virtual machines to take advantage of a particular resource or feature on the target
VM Host, without losing application availability
100 Working with virtual machines