VMware Aria Operations 8.17.1

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Advanced Workload Placement for Allocation Model

VMware Aria Operations
 supports allocation aware advanced workload placement between
vRealize Automation
 and
VMware Aria Operations
 for initial placement of virtual machines. The placement recommendation is based on allocation settings that are defined in the
VMware Aria Operations
 policy. The advanced workload placement awareness for allocation works with the existing demand model.

Need for Allocation Model Awareness

The advanced workload placement based on demand model, depends on the actual demand for resources in a cluster and datastore. If the allocation is based only on the utilization of resources, then it might result in over allocation or over provisioning of resources in clusters. To avoid this,
VMware Aria Operations
 provides allocation model awareness. Allocation model awareness addresses issues related to over allocation or over provisioning by providing you the option of setting the appropriate overcommit ratios in the
VMware Aria Operations
 policy.
The advanced workload placement feature uses the demand model by default and cannot be turned off. To activate the allocation model in addition to the demand model, in
VMware Aria Operations
 configure the appropriate overcommit ratios in policy settings for the preferred clusters, datastores, and datastore clusters.

Prerequisites

  • VMware Aria Operations
     is configured as an endpoint in
    vRealize Automation
    ,this happens automatically in case of
    VMware Aria Operations
  • Advanced placement policy in the Cloud zone must be activated
  • vCenter Cloud account instance on which the initial provision is done should be same across
    VMware Aria Operations
     and
    vRealize Automation
  • Overcommit ratios in
    VMware Aria Operations
     policy must be configured for the following:
    • For CPU and Memory overcommit ratio - Cluster Compute Resource
    • For Disk overcommit ratio - Datastore and Datastore Cluster

How to Activate Advanced Placement Policy

To activate the advanced placement policy, in
vRealize Automation
 Cloud Assembly Service, navigate to
Infrastructure
 >
Cloud Zone
 >
Summary
 tab and set the placement policy to
ADVANCED
.
If
VMware Aria Operations
 returns no recommendations, then under the placement policy, you can specify if you want
vRealize Automation
 to fall back to its default placement using the toggle option.

How to Activate Allocation Awareness in Advanced Workload Placement Feature

To activate Allocation awareness in
VMware Aria Operations
 perform the following actions.
  1. From the left menu, click
    Configure
     >
    Policies
    .
  2. Select
    Policy Definition
    .
  3. Select the Active policy which is assigned to the Cluster Compute resource under Cloud Zones and make the required changes.
  4. Click
    Edit Policy
     and navigate to the
    Capacity
     tile.
  5. Select the
    Object Type
     as Cluster Compute Resource and activate the Allocation Model.
  6. Set the overcommit ratio as per your requirement and click
    Save
    .
  7. Repeat Step 3 to Step 5 for datastore cluster, vSAN datastores and local datastores.
After the configuration is completed,
vRealize Automation
 Cloud makes a provisioning request to
VMware Aria Operations
, and the advanced workload placement engine calculates the recommendation and shares it with
vRealize Automation
. To know the changes after the configuration, view the Allocation metrics and Demand metrics for the cluster.
The allocation model awareness enhancement is limited to advanced workload placement feature. This capability is not extended to workload optimization feature.

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