XenServer® vApps
XenServer vApp: A logical group of one or more related virtual machines (VMs) which can be managed as a single entity. The VMs within a vApp do not have to reside on one XenServer server and are distributed within a pool using the normal rules.
When a vApp is started, the VMs contained within it start in a user-defined order, allowing VMs which depend upon one another to be automatically sequenced. This capability means that you do not need to manually sequence the startup of dependent VMs when the whole service requires a restart.
Using the Manage vApps dialog box
Use the XenCenter® Manage vApps dialog box you can create, delete and modify vApps, start and shutdown vApps, and import and export vApps within the selected pool. When you select a vApp in the list, the VMs it contains are listed in the details pane on the right.
| Control | Function |
|---|---|
 New vApp |
Opens the New vApp wizard. See Create a vApp. |
 Delete |
Deletes the selected vApp. The VMs in the vApp are not deleted. |
 Properties |
Opens a Properties dialog box for the selected vApp. Here you can change its name or description, add or remove VMs from the vApp, and change their start order and delay interval. See Modify vApps. |
 Start |
Starts up all VMs in the selected vApp in the sequence specified by the start order and delay interval values set on each individual VM. See Start and shut-down vApps. |
 Shut Down |
Shut down all VMs in the selected vApp. See Start and shut-down vApps. |
 Import |
Open Import wizard and import an OVF/OVA package as a vApp. See Export and import vApps. |
 Export |
Open the Export wizard and export a vApp as an OVF/OVA package. See Export and import vApps. |