Restarting VMs after a Datacenter Down Event
One of my customers recently had a catastrophic thermal event in one of their datacenters and so had to shut down all of their infrastructure at that site. After the cooling issue was resolved, we were asked to help them to get their infrastructure back online. Fortunately, we have included several small details as best practices in our vSphere designs, and one of those really paid off for us. We always create a VM to Host affinity rule that keeps one Domain Controller, the vCenter server, its PSC and its Database (if external) on a known host in the management cluster. So, after the SAN was powered back on and we restarted the physical ESXi servers, we knew exactly what to do. I fired up the vSphere client and logged into that ESXi server in the management cluster as root. From there, I was able to easily find those core infrastructure VMs and powered them all on. Once they were running, I logged into vCenter... and found that I had an interesting challenge. We needed to tur