Symptoms

Administrators may be unable to access the vCenter. When logging on the UI, the following message is posted: 503 Service Unavailable Failed to connect to endpoint: [N7Vmacore4Http20NamedPipeServiceSpecE:0x00007f975808ee30] _serverNamespace = / action = Allow _pipeName =/var/run/vmware/vpxd-webserver-pipe)

Cause

There can be various causes for this error. Below are some possible scenarios: 1.Service are not started correctly and some services are not up and running: # service-control --status Running: lwsmd vmafdd vmcad vmdird Stopped: applmgmt lookupsvc observability observability-vapi pschealth vlcm vmcam vmonapi vmware-analytics vmware-certificateauthority vmware-certificatemanagement vmware-cis-license vmware-content-library vmware-eam vmware-envoy vmware-hvc vmware-imagebuilder vmware-infraprofile vmware-netdumper vmware-perfcharts vmware-pod vmware-postgres-archiver vmware-rbd-watchdog vmware-rhttpproxy vmware-sca vmware-sps vmware-statsmonitor vmware-stsd vmware-topologysvc vmware-trustmanagement vmware-updatemgr vmware-vapi-endpoint vmware-vcha vmware-vdtc vmware-vmon vmware-vpostgres vmware-vpxd vmware-vpxd-svcs vmware-vsan-health vmware-vsm vsphere-ui vstats vtsdb wcp 2. Certificates are expired. To review the expiration, connect vCenter and run following command: for store in $(/usr/lib/vmware-vmafd/bin/vecs-cli store list | grep -v TRUSTED_ROOT_CRLS); do echo "[*] Store :" $store; /usr/lib/vmware-vmafd/bin/vecs-cli entry list --store $store --text | grep -ie "Alias" -ie "Not After";done;

Resolution

Here are different resolutions for scenario 1 and 2 above: 1.Confirm the status of the VMware vCenter Services. Ensure that all required services are up, running and functional.If services are not started correctly, then restart them using the following KB: Stopping, Starting or Restarting appliance services 2. Check whether the certificates are expired: VxRail: Unable to Log In to vCenter Due to Expired Certificates 3. Review logs for a possible root causes: /var/log/vmware/vsphere-client/logs/ /var/log/vmware/vpxd For further troubleshooting, review the official Broadcom KB: https://knowledge.broadcom.com/external/article?legacyId=67818

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