vCenter Server Appliance Migration fails at 50%: shutting down source machine

I love the vCenter Server Appliance. The migration works pretty well. Still from time to time I stumble across minor problems (which until now were always quite easy to workaround/fix).

One of this migration ‘issues’ I was faced with recently at a customers site.

We migrated a vCenter against an ESXi host which was using a distributed switch and the corresponding portgroup as a target network.

Since we add the virtual network adapter directly on the ESXi host to the distributed switch we need to have an ephemeral portgroup (otherwise only the vCenter could add the VMs network adapter to this portgroup).

The general process of the migration look like the following.

  • Deploy a new and empty vCenter Server appliance and connect it to the network
  • A temporary IP-address is given to this vCenter Server appliance
  • All relevant data of the source windows based vCenter Server is exported and transferrred over the network to the new vCenter Server appliance
  • When the whole data-set is transferred, shutdown the original vCenter and give the new vCSA the network identity of the original vCenter

Unfortunately the last step was not working properly. After a certain amount of time (and coffee) the migration process has stuck at 50% – Shutting down source machine

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vCenter 6.5: #SRM, #vSphere Replication, #NSX problems after SSL change (

After upgrading to vCenter 6.5 I replaced the Certificate Authority certificate of my (external) Platform Service Controller (PSC) with an ‘flenzquest-enterprise ;-)’ signed certificate.

The tasks to replace the ssl certificates haven’t changed much from version 6.0 and has been document very well within the community.

After the successful replacement I realized that I had problems with vSphere replication and NSX. I know that NSX is not supported yet with vSphere 6.5, but so far the NSX Manager connectivity with vCenter 6.5 has worked pretty well (until I replace the certificates).

I had a very bad feeling about this issue and googling about it brought an old case to my attention which I thought has been fixed quite a while ago (obviously it hasn’t). I found an old chat protocol of me, Frank Büchsel and Feidhlim O’Leary on Twitter.

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Migrating to vCenter 6.5: Design decisions and important characteristics/limitations to consider

Even though vSphere 6.5 has been announced and not released yet   Since vSphere and vCenter 6.5 are released now, a customer engagement put me into a position to gather much more information about characteristics and limitations within vCenter 6.5.

In the following I will discuss some of the upcoming and current vCenter characteristics that might not be completely aware (are not well documented) within the field /community.

Thanks VMware @Twitter community for helping me out here. Once again I really benefit from this great network out there.

The goal was to define a logical and physical design for the new vCenter release. Within the project we will have two phases

  1. phase: vCenter 6.0
  2. phase: vCenter 6.5

We will give the GA release of vCenter 6.5 a minimum time of 3 months to observe its behaviour and production readiness. Since we might require feature from the vCenter 6.0 release we want to design that is ready for an easy transition from 5.5 over 6.0 to 6.5.

However if you ever decide to move on to vSphere or vCenter 6.5. Please check the upgrade sequence here first & check the compatibilities (within VMware’s and 3rd party products).

Current state:

  • Windows based vCenter (vCenter 5.5 U2e)
  • SQL Server installed on the vCenter Windows

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