Solved

Moving existing Host into new Cluster

Posted on 2011-09-16
10
1,467 Views
Last Modified: 2016-03-31
Quick question....I have found info on migrating a host from one cluster to another, but not moving an existing host into a cluster. Here is my setup....

Client has a new Vmware setup that includes 2 Hosts running ESXi 4.1 and managed through VCenter. Until now they have just been seperate hosts.

Host A has been in production a couple months and has about 5 server VMs on it and a Linked Pool clone for desktops. Host B was just recently setup and only consists of an ESXi 4.1 server with a Datastore connected. They are on the same subnet connected through fiber.

I have created a cluster for HA (not DRS) and just want to move both hosts into it. When I go to drag and drop Host A comes up with a warning saying "...it will collapse resourse pools..." which does not sound good. Host B moved just fine.

Host A stores the VCenter server. So I am trying to figure out what the "collapse" actually means and the best method to move a host into the cluster that is in use.
0
Comment
Question by:Appnet
  • 6
  • 3
10 Comments
 
LVL 119
ID: 36551918
Drag and Drop the host into the Cluster.
0
 
LVL 119
ID: 36551978
Do you have any Resource Pools Defined?

when moving the host into the cluster do you not get a Wizard as follows:-

 Adding-to-Cluster.jpg
0
 
LVL 119

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 250 total points
ID: 36552041
Do you have any resource pools defined on host server or cluster?

If you do they will be "collapsed" or removed.

from the docs...

VMware vSphere Availability Guide ESX 4.1vSphere
http://www.vmware.com/pdf/vsphere4/r41/vsp_41_availability.pdf

When a new host is added to a cluster

• The resources for that host immediately becomes available to the cluster for use in the
cluster's root resource pool.

• Unless the cluster is also enabled for DRS, all resource pools are collapsed into the cluster's
top-level (invisible) resource pool.

• Any capacity on the host beyond what is required or guaranteed for each running virtual
machine becomes available as spare capacity in the cluster pool. This spare capacity can
be used for starting virtual machines on other hosts in case of a host failure.

More Reading Material, very good.....

VMware vSphere 4.1 HA and DRS Technical deepdive (Volume 1)
By Duncan Epping and Frank Denneman
(http://www.yellow-bricks.com/vmware-high-availability-deepdiv/)

ISBN-10: 1456301446
ISBN-13: 978-1456301446

Written by Duncan Epping and Frank Denneman, both of whom are Consulting Architects at VMware and are perceived by the industry as Subject Matter experts on VMware High Availability and VMware Distributed Resource Scheduler.
This book zooms in on two key components of every VMware based infrastructure. It covers the basic steps needed to create a VMware HA and DRS cluster, and goes on to explain the concepts and mechanisms behind HA and DRS which will enable you to make well educated decisions. You will get the tools to understand and implement e.g. HA admission control policies, DRS resource pools and resource allocation settings and more.

On Amazon US

[Paperback]
http://www.amazon.com/gp/product/1456301446?ie=UTF8&tag=yellowbricks20&linkCode=as2&camp=1789&creative=9325&creativeASIN=1456301446

[ebook]
http://www.amazon.com/dp/B004V49JGW/ref=as_li_tf_til?tag=yellowbricks20&camp=0&creative=0&linkCode=as1&creativeASIN=B004V49JGW&adid=0ED4RKK85G6ZTGTH9ENP

on Amazon UK

[Paperback]
http://www.amazon.co.uk/Vmware-Vsphere-4-1-Technical-Deepdive/dp/1456301446/ref=sr_1_2ie=UTF8&s=books&qid=1305637596&sr=8-2

[ebook]
http://www.amazon.co.uk/VMware-vSphere-4-1-technical-deepdive/dp/B004V49JGW/ref=sr_1_1?ie=UTF8&s=digitaltext&qid=1305637596&sr=8-1

Available in Europe from
http://www.comcol.nl/detail/73133.htm

0
Migrating Your Company's PCs

To keep pace with competitors, businesses must keep employees productive, and that means providing them with the latest technology. This document provides the tips and tricks you need to help you migrate an outdated PC fleet to new desktops, laptops, and tablets.

 

Author Comment

by:Appnet
ID: 36552067
There is one defined resource pool. So it will be deleted and need yo be recreated?
0
 
LVL 119
ID: 36552079
Yes, is this on the server or cluster?
0
 

Author Comment

by:Appnet
ID: 36552089
The pool is under Host A which is the one I still need to move
0
 

Author Comment

by:Appnet
ID: 36552098
Now that resource pool is associated w a linked pool....does that change anything?
0
 
LVL 119

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE^2)
Andrew Hancock (VMware vExpert / EE MVE^2) earned 250 total points
ID: 36552139
The Linked Clone Resource Pool you have defined on the Host Server will be removed, when moved into the Cluster Resource.

You will need to recreate it.
0
 

Expert Comment

by:Venthought
ID: 41530568
Hi Andrew and Appnet,

I'd like to comment on this as I have the same situation but in my case I don't have resource pool configured in the datacenter.

I just need to verify a couple of things:

1. I created a new cluster under the same datacenter and I will enable HA to this new cluster. Should I have to enable HA first or do I have to move the host first before enabling HA?

2. Moving the hosts to the new cluster - would it affect the active VMs? Is there a need to migrate all the VMs to the other hosts first before moving the host? and then move them back to the host, this time to the new cluster. And is it simple as drag-and-drop? or do I have to disconnect, remove and add the host to the new cluster?
0
 
LVL 119
ID: 41530602
@Venthought - Please post a new question, and myself or other Experts will be glad to assist.
0

Featured Post

Manage your data center from practically anywhere

The KN8164V features HD resolution of 1920 x 1200, FIPS 140-2 with level 1 security standards and virtual media transmissions at twice the speed. Built for reliability, the KN series provides local console and remote over IP access, ensuring 24/7 availability to all servers.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

When converting a physical machine to a virtual machine using VMware vCenter Converter Standalone or vCenter Converter Enterprise, if an adapter type is not selected during the initial customization the resulting virtual machine may contain an IDE d…
In this article, I will show you HOW TO: Suppress Configuration Issues and Warnings Alert displayed in Summary status for ESXi 6.5 after enabling SSH or ESXi Shell.
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…
This Micro Tutorial steps you through the configuration steps to configure your ESXi host Management Network settings and test the management network, ensure the host is recognized by the DNS Server, configure a new password, and the troubleshooting…

821 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question