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vSAN Health Service - Cluster Health - Advanced vSAN configuration in sync (2107713)

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Purpose

This article explains the Cluster Health - Advanced vSAN configuration in sync check in the vSAN Health Service and provide details on why it might report an error.

Resolution

Q: What does the Cluster Health - Advanced vSAN configuration in sync check do?

vSAN has a number of advanced configuration options that can be used for tuning, or to address the special requirements of particular deployments. These advanced configuration options are set on a per ESXi host basis, which makes it easy to create inconsistent advanced setting configurations across a vSAN cluster.  This check ensures critical vSAN advanced configuration options have a consistent value across all ESXi hosts in a given vSAN cluster.

Note: A check is done to verify if the value is good or even if it is the default. It is purely a check for consistency. If you have set any advanced settings to values that are not appropriate, this check does not highlight this if they have been set to consistently inappropriate values across all the ESXi hosts in the cluster.

Q: What does it mean when it is in an error state?

If this check fails, it means that some advanced configuration settings have different values on different ESXi hosts in the vSAN cluster. The advanced configuration parameter that is not in sync is displayed in the health check details.

Q: How does one troubleshoot and fix the error state?

Verify that all the ESXi hosts are the same version. For certain Advanced configuration its default values could be different between different ESXi host versions. If the software version for all ESXi hosts in the cluster do not match, upgrade the ESXi hosts so that the ESXi software versions are consistent among all ESXi hosts in the cluster.
 
Also verify that all vSAN Advanced configuration options are set to the same value on all ESXi hosts in the cluster.

To change the Advanced setting:
  1. Log in to the vCenter Server using the vSphere Web Client.
  2. Navigate to Hosts & Clusters, select the ESXi host from the inventory that this health check has highlighted as having the incorrect advanced settings.
  3. Select Manage > Settings > Advanced System Settings.
  4. Update the advanced setting to ensure that all settings are consistent throughout the cluster.
Notes:
  • Changing some of the Advanced settings may require a restart of services.
  • Host profiles is one sure way to keep all nodes in a vSAN cluster consistent, and highlights if any settings are not in sync. For more information, see the vSphere Host Profiles Guide.

Additional Information

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