When trying to login to the vCenter Appliance Management Interface (VAMI) UI via https://<vcenter-fqdn>:5480 as root, you receive the message “Unable to login”.
It is possible to log in using the same username and password via SSH
Logging into the main vCenter web interface is also fine, but it displays a health warning: VMware vAPI Endpoint Service Health Alarm
Connect to vCenter appliance via SSH session and check service status:
service-control --status Stopped: applmgmt vmcam vmware-imagebuilder vmware-mbcs vmware-netdumper vmware-pod vmware-rbd-watchdog vmware-statsmonitor vmware-vcha vsan-dps Running: lwsmd pschealth vmafdd vmcad vmdird vmdnsd vmonapi vmware-analytics vmware-cis-license vmware-cm vmware-content-library vmware-eam vmware-perfcharts vmware-postgres-archiver vmware-rhttpproxy vmware-sca vmware-sps vmware-sts-idmd vmware-stsd vmware-updatemgr vmware-vapi-endpoint vmware-vmon vmware-vpostgres vmware-vpxd vmware-vpxd-svcs vmware-vsan-health vmware-vsm vsphere-client vsphere-ui
While the vmware-vapi-endpoint service is running, the applmgmt service is not.
Start this then restart the vmware-vapi-endpoint service:
service-control --start applmgmt service-control --status service-control --stop vmware-vapi-endpoint service-control --start vmware-vapi-endpoint tail -f /var/log/vmware/vapi/endpoint/endpoint.log