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ESXi 5.5 vAPPS and DRS

Posted on 2014-09-09
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Last Modified: 2014-09-15
I am studying for the VCP-DCV 5.5 exam and have the following question.

Why do vApps need DRS to be enabled in order to create a vApp
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Question by:compdigit44
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5 Comments
 
LVL 121
ID: 40313307
Damn fine question, I've been dealing with another EE Question and vCOPS which is delivered as an vApp OVF, and this is available as Foundation for vSphere users with an Essentials Plus license, but it's damn difficult to deploy....

because Essentials Plus does not have DRS included in the license, so if you try to deploy the OVF normally, it fails to deploy in the HA Cluster, because the vApp requirement is for DRS to be enabled, and so there is a very long winded, method of removing Host from Cluster, Deploy to the Standalone host, and then add back to the Cluster which breaks the vApp, but it still works!

That Article is here

Deploying VMware vCenter Operations Manager 5.x with vSphere Essentials, Essentials Plus, or Standard (2013695)

and this article states...

Since vCenter Server 2.0, Distributed Resource Schedule (DRS) is required for deployment of a resource pool in a cluster. DRS is used to place the virtual machines in a vApp in the cluster.

You must have a DRS enabled Cluster to create a vApp....

vApp is a container, resource pool which must exist in a Cluster,  but that still does not explain why DRS must be enabled...

You probably find a question which reads....

When creating a vApp, what must be enabled...

1. Cluster with HA enabled
2. Cluster with DRS enabled
3. Cluster with HA and DRS enabled
4. No Cluster
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LVL 20

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by:compdigit44
ID: 40313352
This is the part the confused me.... "DRS is used to place the virtual machines in a vApp in the cluster."  But you can drag and drop VM's into a vApps...
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LVL 121
ID: 40313373
It could just be licensing enforcement, to get sites to purchase Enterprise Plus for DRS!

or vApp is dependant upon DRS by design... or license, or .....

I'm checking, if anyone has the technical WHY!
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LVL 20

Author Comment

by:compdigit44
ID: 40313387
Thanks Hancock!!!!!
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LVL 121

Accepted Solution

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Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 40320840
The general consensus, by a few VMware vExperts...

it's the way it was designed..... or because vApps are resource pools, they need to be associated with DRS.

So as I posted...

1. Resource pools
2. DRS
3. Design

but what you need to take away is vApps are containers for resource pools, which many do not understand or appreciate, and they state they do not use Resource Pools, but they do use vApps!

So they are using Resource Pools.....
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