There were some confusion from partners and customers that vSAN will fail if vCenter is down. So is it really?

If you are not interested in reading the rest of the post, heres the quick answer.

vSAN & vCenter are totally independent of each other and vSAN will continue to run even without vCenter.

Assuming you had a vSAN cluster all setup and configured today, running production workload. Someone then accidentally powered off the vCenter server, technically, nothing is going to happen to the vSAN environment. IOs will continue to flow, data will continue to be written, and cross site replications continue to protect.

There are no dependencies at all with regards to the up-time and availability of vSAN with the loss of vCenter. To extend this further, we have recently also built-in vSAN Health Check directly into vSphere Host Client UI. If vCenter becomes unavailable, users can directly connect to each individual vSAN Host to view the Health Status of all the vSAN components. With vSphere 6.7, it is now presented in HTML5!