This blog post from blogs.vmware.com is dedicated to gaining more knowledge on what to do when troubleshooting vMotion if a live-migration is not successful. What are typical reasons for failed migrations? What logs to look into? Let’s have a look at how you can troubleshoot and prevent vMotion operations to fail
vCenter appliance is a vm and most of the time we are running it on the same ESXi cluster.
In some cases we may need to increase the disk capacity of some partition(most of the time its log file path).If our vCenter is running out of disk space, vCenter related services may not tart as expected. To resolve this issue we need to increase the free space capacity of the vCenter appliance.
Telnet is the command which we can easily use to check the service status of the remote system.
Ex if we can telnet to vCenter server from our desktop using port 443, we can say that web services of the vCenter is up
But when we use vCenter shell or ESXi shell, we cannot use telnet command.
As an alternative option, we can use curl command. Please refer the below screen capture