7.3

Table Of Contents
Table 215. Choosing a Reservation Scenario (Continued)
Scenario Procedure
Create a reservation to allocate resources on an OpenStack.
resource.
Create an OpenStack Reservation
Create a reservation to allocate resources for SCVMM. Create a Reservation for Hyper-V, KVM, SCVMM, vSphere, or
XenServer
Create a reservation to allocate resources for XenServer. Create a Reservation for Hyper-V, KVM, SCVMM, vSphere, or
XenServer
Create a reservation to allocate resources for Microsoft Azure. Create a Reservation for Microsoft Azure
Creating Cloud Category Reservations
A cloud category type reservation provides access to the provisioning services of a cloud service account
for a particular vRealize Automation business group. Available cloud reservation types include Amazon,
OpenStack, vCloud Air, and vCloud Director.
A reservation is a share of the memory, CPU, networking, and storage resources of one compute
resource allocated to a particular vRealize Automation business group.
A business group can have multiple reservations on one endpoint or reservations on multiple endpoints.
The allocation model for a reservation depends on the allocation model in the associated datacenter.
Available allocation models are Allocation Pool, Pay As You Go, and reservation pool. For information
about allocation models, see thevCloud Director or vCloud Air documentation.
In addition to defining the share of fabric resources allocated to the business group, a reservation can
define policies, priorities, and quotas that determine machine placement.
To provision successfully, the reservation must have sufficient available storage. The reservation's
storage availability depends on:
n
How much storage is available on the datastore/cluster.
n
How much of that storage is reserved for that datastore/cluster.
n
How much of that storage is already allocated in vRealize Automation
For example, even if the vCenter Server has storage available for the datastore/cluster, if sufficient
storage is not reserved in the reservation then provisioning fails with a "No reservation is available to
allocate..." error. The allocated storage on a reservation depends on the number of VMs (regardless of
their state) on that specific reservation. See the VMware Knowledge Base article Machine XXX: No
reservation is available to allocate within the group XXX. Total XX GB of storage was requested
(2151030) at http://kb.vmware.com/kb/2151030 for more information.
Understanding Selection Logic for Cloud Reservations
When a member of a business group creates a provisioning request for a cloud machine,
vRealize Automation selects a machine from one of the reservations that are available to that business
group. Cloud reservations include Amazon, OpenStack, vCloud Air, and vCloud Director.
Configuring vRealize Automation
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