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Knowledge Base

Cannot connect to vCenter Server on Initial Configuration/ Setup of Horizon View (1029135)

Last Updated: 12/6/2023Categories: TroubleshootingTotal Views: 96661Language:
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Symptoms

Appropriate Accounts with Permissions are configured for Horizon in vCenter: Configuring User Accounts for vCenter Server

When Configuring Vcenter in Horizon using the Instructions in Documentation, it fails to complete the set-up Configure a vCenter Server User for Horizon 8

Purpose

This article provides information on troubleshooting the inability to connect to the vCenter Server from the VMware Horizon administration portal during initial setup.

For Intermittent connectivity issues, Please see:

Horizon View Best Practices: Instant Clone Provisioning and Troubleshooting (91265)

Cause

The Horizon will initiate an SSL-encrypted connection to Vcenter. Successful Connection is reliant on Network Connectivity, Account Privileges and successful completion of the SSL Handshake.

Resolution

The computer hosting vCenter Server has an active network connection.

vCenter Server is running.

vCenter Server is reachable from the VMware Horizon Connection Servers.

You can resolve the hostname of the vCenter Server from your VMware Horizon Connection Servers.

The vCenter Server user specified in the VMware Horizon Administrative Portal settings has the correct permissions/ password.

The SSL Certificates configured for Vcenter match the hostname used and are trusted.

There are no third-party interaction issues with the operating system hosting the VMware Horizon Connection Servers.

The steps are ordered in the most appropriate sequence to isolate the issue and to identify the proper resolution. They are also sequenced to minimize data loss. After each step, try to connect to your vCenter server. Work through each troubleshooting step in order, and do not skip a step.

If you can not connect to the vCenter Server:

Network

Ensure Basic Network connectivity is functional - Both your Vcenter and Broker can communicate on a virtual level using standard networking tools and commands from both endpoints and the Connection Server can communicate on port 80 and 443 to the Vcenter.

Confirm that DNS name resolution is operating correctly in your environment between these devices.

Ensure any Firewall exceptions to allow connectivity have been configured and are active.

Resources:

Troubleshooting Tools for Networking on vCenter Server Appliance 6.5 and Above (2147148)

Configuring a VLAN on a portgroup (1003825).

Testing VMkernel network connectivity with the vmkping command (1003728)

VMware Horizon ports and network connectivity requirements (1027217)

Troubleshooting Domain Name System (DNS) issues (Microsoft Website Disclaimer: VMware is not responsible for the reliability of any data, opinions, advice or statements made on third-party sites)

Edit the DNS and IP Address Settings of the vCenter Server Appliance

Services:

Ensure the required VMware Horizon Connection Server services are running. For more information, please see Services on a Connection Server Host in a VMware Horizon 8 Environment

Ensure the Vcenter is running appropriately and healthy View the vCenter Server Appliance Health Status

Permissions:

Confirm that permissions/credentials are correct for the vCenter Server user.  As a Litmus test, you should be able to login to vCenter with the credentials configured in Horizon.

SSL Certificates:

In a Horizon 8 environment, replace the default certificate that is installed with vCenter Server with a certificate that is signed by a CA. You can use openTLS to perform this task for the vCenter Server. For details, see Replacing vSphere Certificates - VMware Docs

Ensure Hostnames used match the vCenter FQDN entry in Horizon configured in Horizon.

If the issue persists after completing the steps in this article:

Collect the VMware View diagnostic bundle. For more information, see Collecting VMware Horizon View logs and diagnostic information (1017939).

File a support request with VMware Support and quote this Knowledge Base article ID (1029135) in the problem description. For more information, see How to Submit a Support Request.

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End Of General Availability of the Free vSphere Hypervisor (ESXi 7.x and 8.x) (2107518)

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Download and Install VMware Fusion (2014097)

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