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VMware Cannot Add Host to Cluster

Posted on 2012-03-29
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Last Modified: 2012-03-29
I am trying to set up HA but am having some difficulties.

I have created a cluster, Cluster1, but when I try to add a host I am unable.  If I try to add by the name of the host as shown in the DNS portion of ESXi vCenter says "cannot contact host".  The computer is named HP3 and I've tried that as well as hp3.mycompany.lan as shown in the DNS portion.  If I try adding by IP (10.0.1.99) it says that name already exists as that is what the host is called in vCenter.

What can I do to add my hosts to a cluster?
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Question by:Drafter421
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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check you have DNS, Reverse DNS working, and setup correctly.
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Author Comment

by:Drafter421
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The DNS was not there.  It is now.  But now when I enter HP3 instead of getting cannot contact I get "the name 10.0.1.99 already exists"
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by:Andrew Hancock (VMware vExpert / EE MVE)
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remove the failed server
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Author Comment

by:Drafter421
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Remove from what?  It is hosting production VMs.  Will they stay online?
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by:Andrew Hancock (VMware vExpert / EE MVE)
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is the server in vCenter?
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by:Drafter421
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The ESXi server?  Yes.
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Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
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just drag and drop the server into the cluster
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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you do not need to add the host again if already in vCenter
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by:Drafter421
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Nothing happens when I do that.
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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drag the host into cluster
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Author Comment

by:Drafter421
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I've tried that.  Nothing happens.  After I try that the summary of the cluster says 0 hosts and 0 everything else.
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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are you connected to vCenter?

and Hosts and Clusters is selected in Inventory?
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Author Comment

by:Drafter421
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Here's picture.  When I try dragging 10.0.2.50 into Fisher Cluster nothing happens.

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Author Comment

by:Drafter421
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Connected to vCenter = yes.
Hosts and Clusters selected = Yes.
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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if I click a host and drag do not release button, the mouse cursor changes to a block, then move this to your cluster, a wizard will appear about resource pools
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by:Andrew Hancock (VMware vExpert / EE MVE)
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Add Host option on the Cluster, should read Add New Host not in vCenter.
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by:Drafter421
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If I drag the host (10.0.2.99) and drag it around I get the "can't put this here" symbol" everywhere except over the cluster.  When I release the host over the cluster, nothing happens.  No confirmation of any kind.  Then the summary of the cluster indicates nothing is in there.
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Author Comment

by:Drafter421
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If I drag it to the Western cluster I do get an add host wizard, but not for the Fisher cluster.  Is it important which cluster it is in?
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Author Comment

by:Drafter421
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They are in different physical locations.
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Author Comment

by:Drafter421
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10.0.1.99 is more of a test host.  10.0.2.50 is production.  I thought I should keep those seperate.
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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you need to move to the correct cluster
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Author Comment

by:Drafter421
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Which to me should be Fisher Cluster but nothing is happening there when I try to drag the host into that.
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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if they are both managed by vCenter should be no issues
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Expert Comment

by:Andrew Hancock (VMware vExpert / EE MVE)
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can the hosts see the same storage?
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Author Comment

by:Drafter421
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I rebuilt the cluster and it works.  That was weird.  Thanks once again for all your help hanccocka.  You rock.
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Author Closing Comment

by:Drafter421
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Thanks again.
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