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Can’t Discover ESXi using EMC Control Center May 15, 2011

Posted by General Zod in Tech, VMware.
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Since VMware has announced that 4.1 will be the last revision of ESX, I’ve started migrating our VMware Hosts to ESXi… and since I’d just acquired a new DL580 G7, I decided that it would be the first ESXi Host.  So when it came time for our SAN Admin to discover the host via the EMC Control Center, we were presented with the following error:

Not able to connect to host <SERVER.DOMAIN.COM>.  SSL certificate verification failed.

EMC support had the answer…

The ESXi 4.1 installation will build a new Host with the default name of “localhost.localdomain”… and generate the SSL certificate for the Host before you can rename it.  So after you rename the Host and then use ECC to discover <SERVER.DOMAIN.COM>, it immediately recognizes that the SSL certification is not valid.

After you rename the Host, you’re going to need to recreate the SSL certificate.  We were instructed to do so as follows:

  • Connect your VI client to your vCenter Server.
  • Put the ESXi Host into Maintenance Mode.
  • Access either the Local or Remote Technical Support Mode console.
  • Run the following command to recreate the SSL certificate:

    /sbin/generate-certificates.sh

  • Reboot the ESXi Host.

Once the Host comes back online, it will not reconnect with your vCenter Server, so you’ll need to re-authenticate with the Host’s ROOT account.

  • Right-click the ESXi host in teh VI client, and click “Connect”.
  • When prompted, re-enter the ESXi Host’s ROOT credentials.

Then, point your web browser at the ESXi host.  When you see the Security Warning, click [View Certificate].  Confirm that the Certification Path is pointing to <SERVER.DOMAIN.COM>.

Finally, go attempt to re-discover the ESXi host with the EMC Control Center.

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