Resolution – ESX hosts unexpected disconnect from Virtual Center ( ESX 3.5 update 2 )
Posted on August 23rd, 2008 in Virtualization | 12 Comments »
When I try to log in to my virtual center to verify my VM farm today, the virtual center show my 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 1st thing I try to verify is to ensure all my VM and the ESX host is still in production mode, and yes, all the VM is not been down and it still run as normal while it disconnected.
Here is what I did to reconfigure my ESX host and re-join it back to the HA and DRS cluster in my production farm.
Disable the HA and DRS features from the cluster, and totally remove the ESX host from the inventory on Virtual Center server. Follow by that, I SSH in to the ESX host with su -, then I path to the /etc/init.d and look for the services mgmt-VMware status command
High Availability (HA) and DRS in ESX
Posted on August 22nd, 2008 in Virtualization | No Comments »
The HA and DRS features become an important and a must for enterprise usage in production. For the latest updated patch release from VMware, you will realize some changes had been made in the way the HA communicated.
there is an incident for myself that the HA keep disconnect and reconnect automatically for every couple of minutes. The work around is you need to make sure the hostname that you configure for your esx server is still with lower case or upper cases. If you do have mix environment with upper case and lower case in the physical cluster for ESX, you will experience this technical issue due to the way of the HA communication had been tie to the DNS name. In linux, case sensitive is always apply
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