This morning when I try to log in to my vCenter Server using vSphere Client to verify my virtual farm. The vSphere Client show one of the ESX host had been disconnected from the virtual center by itself. The ESX host itself should be running in critical mode as production and had HA and DRS enable on the cluster.
The first thing I did is to verify that the entire VM’s and ESX host itself is still in production without any issues. Which was the case, all the VM were up and running as normal while the status is disconnected.
After that I had to resolve the issue by reconfigure my ESX host and rejoin it back to the HA and DRS cluster in my production farm.
These are the steps I had to go through to resolve the issus:
1) Disable the HA and DRS features from the cluster
2) SSH to the host in question and then path your way to the /etc/init.d and look for the services "mgmt-vmware status" command.
Then you need to issue the command "services mgmt-vmware restart". This process usually takes a minute or so to get the service fully restarted.
Once the services restarted, you can easily add host to the virtual center and reconfigure the HA and DRS cluster mode again. The ESX host is back to normal and status of all the VM's running on that host should change back to normal and should work perfectly as usual.
In some instances by just restarting the mgmt-vmware might not resolve the issues, and you might need to restart the vmware-vpxa services as well. To restart the vmware-vpxa, all you nedd to do is to initiate the "services vmware-vpxa restart" at the CLI.
For more details, refer to VMware KB
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