VMware vSphere

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  • 1.  Failed to communicate with the vCenter Single Sign On server

    Posted Feb 19, 2019 04:07 PM

    Dear

    This morning we couldn't connect to our machine anymore so we physically restarted the server.

    After reboot we could no longer log on using our Domain accounts. (Web client and Vsphere Client)

    Setup was done by previous IT crew and local password never documented.

    However i've found a way to reset the default password using How to Reset SSO (administrator@vsphere.local) Password - YouTube .

    This seems to work as I get confirmation from my new password but even with this password I still can't log in.

    Could you please tell me what else I can try or check as we can no longer access our Vsphere environment.



  • 2.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 20, 2019 02:23 AM

    Hi PartenaOZV and welcome to the community!

    Could you confirm whether you have an external or internal SSO? Also is this a Windows vCenter or vCSA deployment?

    Kind regards.



  • 3.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 20, 2019 08:07 AM

    Hello ThompsG

    This is a Windows Vsphere.

    How can I verify which SSO is used ?



  • 4.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 20, 2019 09:24 AM

    What version are you running?



  • 5.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 20, 2019 09:50 AM

    Vsphere 5.5



  • 6.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 20, 2019 11:45 AM

    Restart the SSO service from Windows Services and try again



  • 7.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 20, 2019 12:46 PM

    I don't seem to have a Single Sign on Service

    However problem came after having to reboot the server physically and after the physical reboot I did a clean reboot.



  • 8.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 21, 2019 06:11 AM

    It's the VMware Identity Management Service.



  • 9.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 21, 2019 09:21 AM

    Already restarted in previous attempts, however now we've reinstalled our SSO completely from the install cd.

    Now we get a different error when trying to connect:

    When trying to create a new cert. via openssl we get the following error :



  • 10.  RE: Failed to communicate with the vCenter Single Sign On server

    Posted Feb 21, 2019 09:40 AM

    Hi PartenaOZV,

    You have gone a little off the beaten path now :smileywink:

    Firsly download the vCenter Certificate Automation Tool v5.5 as located here: https://kb.vmware.com/s/article/2057340

    From here you should be able to get vCenter to trust the new certificates on the SSO deployment. One of the options is to plan your steps and there should be an option for SSO cert replacement/trust. This will tell you what steps to run.

    This may not work however as vCenter actually registers with SSO on install so you may need to recreate the registration as well given your SSO is now newly created. I would test in a LAB but one option would be to ensure you have a good backup of the database and then reinstall vCenter over the top.

    Kind regards.