This is probably the shortest post I’ve written so far, but it might be worth sharing.
Usually I boot my lab only when I really do something with it, and sometimes some of the VMs, service, etc. don’t like that up and down.
Today I wanted to log into my vCenter Server Appliance which was running fine the last couple of months, when both Clients promted me an error. The Web Client was a little bit more precise:
Could not connect to one or more vCenter Server systems: https://192.168.178.110:443/sdk
Error message of the vSphere Client:
Call “ServiceInstance.RetrieveContent” for object “ServiceInstance” on Server “192.168.178.110” failed.
To cut some corners here, in the end it turned out to be a simple DNS problem because my DNS server wasn’t properly booted. So before starting troubleshooting check your DNS resolution first.