I changed the vCenter 6 IP from within web client.

Since I had problems connecting to the new IP, I restarted the server via vSphere Client directly on the host using VMware Tools.

After the restart, I can't connect to vCenter any more. Trying to connect via https shows me the following error:

503 Service Unavailable (Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x7f4158068bf0] _serverNamespace = / _isRedirect = false _pipeName =/var/run/vmware/vpxd-webserver-pipe)

Then I directly used the console, enabled ssh and bash and logged in there.

I tried to check the current IP settings via the script used in version 5.5 which still exists (/opt/vmware/share/vami/vami_config_net) but fails with multiple errors.

Then, I tried to reset the certificates via certificate manager (/usr/lib/vmware-vmca/bin/certificate-manager), but I could not login via SSO (seems that SSO service could also not be started).

Then, I had a look in the log files, and noticed a problem with vmware-vpxd:

VC SSL certificate does not exist, it will be generated by vpxd

This did not help either. I tried to manually start the service, with the same result.

How can I fix my vCenter?