Moving hosts between active EVC clusters (going from 4.1 to 5.5)

Hi all

This is my first post here on communities and I hope it will be a great moment

Currently, we are running a cluster of production unique (4.1U3a vCenter) made 10 IBM x 3850 X 5 hosts where:

  • 5 guests have X 7560 Intel processors (ESXi 4.1U3)
  • 5 guests have CPUs of E7 - 8837 Intel (ESXi 4.1U3)

Cluster is active EVC: Nehalem Genesis (Xeon Core i7)

He must now leave whole cluster existing 4.1U3a vCenter for a new vCenter 5.5U1 constantly of the VMs system (we cannot touch/upgrading old vCenter). Is it not possible? Correct me if I'm wrong, but I want to do this way:

  1. Disable HA and DRS on 4.1U3a Cluster (let such VCA what)
  2. Disconnect the 4.1U3a Cluster hosts (a)
  3. Once that all hosts are disconnected remove hosts in the cluster 4.1U3a (one)
  4. Create new Cluster on 5.5U1 vCenter
  5. Select CVS on the new Cluster 5.5U1 vCenter (and set it to Nehalem Genesis (Xeon Core i7), as was the old 4.1U3a vCenter)
  6. Add a host 5.5U1 vCenter, off the new cluster (on the level of data center)
  7. Move newly added welcome the new active EVC Cluster to vCenter 5.5U1
  8. Repeat steps 6 and 7 for all remaining hosts
  9. Turn on HA and DRS on the new Cluster on 5.5U1 vCenter
  10. Test of vMotion and to each ESXi (and pray it works)

This plan could work? I was testing this on the lab environment and all seems OK, but I'm afraid I missed something. As far as I understand CVS it should work as long as I'm not power cycle all VM during the hosts 'move '.

Thank you all for your help.

Normally you can not add directly to a cluster as when you import the host to vCenter he does not see as having enabled EVC and is safe.  I was wondering for the sake of ease, not want you back up the database from the old server and put this backup on the new and just update?  It may contain some old information, you may not, but that would mean that your hosts basically would come immediately upward in the cluster without having to do all that extra work.  Also do not go to the 5.5 Update 1 if you use NFS.

Tags: VMware

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