vSAN Health Service - Cluster Health - Time Synchronization Across Hosts and vCenter
Article ID: 326424
Updated On:
Products
Issue/Introduction
This health check validates the time difference between vCenter Server and ESXi hosts. Any difference larger than 60 seconds causes this check to fail.
When the times settings are inconsistent across vCenter Server and hosts, and the time difference is larger than 60 seconds, problems with vSAN performance statistics retrieval might occur.
Note: It is always strongly recommended to have an consistent time synced across your environment - including but not limited to your ESXi hosts, vCenter Appliance, or any other workload. Time differences across an environment can cause unintended side effects.
Environment
VMware vSAN 7.0.x
VMware vSAN 8.0.x
Resolution
Enable NTP service across the hosts and vCenter Server, or synchronize the time settings manually.
The below KBs can assist with setup and troubleshooting NTP:
Configuring vCenter Server to use a Network Time Protocol (NTP) server (57146)
Configuring Network Time Protocol (NTP) on ESX/ESXi hosts using the vSphere Client (2012069)
Guide to configure NTP on ESX servers (1003063)
Troubleshooting NTP on ESX and ESXi 4.x / 5.x / 6.x (1005092)
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