This post will cover the vCenter High Availability part (VCHA). VCHA is pretty easy to enable as its available under the configuration section of vCenter server, with just 2 pre-requisites.
After enabling VCHA we will be having 2 extra VM’s. One is the vCenter passive node which will act as vCenter in the event that Active vCenter is down and Other VM is vCenter witness which will simply act as witness for split brain or cluster majority.
How Many DNS records and Management IP’s the vCenter will have after VCHA ?
the Management IP in our case vcenter-vc01.sslab.com (192.168.1.213) is the only one which will serve vCenter purposes. In the event the Active vCenter goes down, the passive vCenter will claim the management IP and it will serve the vCenter management part.
Can vCenter work if both active and passive fails with witness ?
the witness VM will not hold any data , it is just a quorum majority. so at any point vCenter can afford failure of either active or passive node only.
Pre-requisites for this post
- Make sure the Part1, Part2, Part 3 and Part 4 of this series are successfully completed.
- Standard or Distributed switch port group of vCenter Heart Beat is created. Note this should be separate from vCenter management network.
- Free IP’s (3) for vCenter Heart beat network for all 3 vCenter appliances part of VCHA.
- 192.168.3.10 ( for Active vCenter)
- 192.168.3.11 ( for Passive vCenter)
- 192.168.3.12 ( for Witness VM)
Configuring vCenter HA
Make sure the VCHA Network is available.
Login to vCenter server web client -> Click on vCenter server Name -> Configuration -> vCenter HA -> Select Configure as shown below.
If there are any compatibility warnings click edit and move the VM’s to other hosts and select different datastore as needed.
Review and click Finish to deploy the passive and witness VM’s for vCenter server.
With this the vCenter 6.7 installation with External PSC and VCHA is completed.
Quick Links for vCenter 6.7 Installation Series
Links to all the posts in vCenter 6.7 VCHA installation with External load balanced PSC
Hope this series is useful. Leave your feedback and comments.