ESXi Upgrade Fails with "ESXi Cluster Is Not Healthy" Error.
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ESXi Upgrade Fails with "ESXi Cluster Is Not Healthy" Error.

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Article ID: 378255

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Updated On:

Products

VMware SDDC Manager

Issue/Introduction

When attempting an ESXi upgrade, you may encounter a failure due to "ESXi cluster is not healthy" errors, despite all prechecks passing during the planning phase. This issue typically occurs when there are active "vSphere HA failover" alerts in vCenter.

Error seen:

“The ESXi cluster is not healthy (green) due to : vSphere HA failover operation in progress in cluster <Cluster Name> in datacenter <Datacenter Name>: <VMCount> VMs being restarted, <VMCount> VMs waiting for a retry, <VMCount> VMs waiting for resources, <VMCount> inaccessible vSAN VMs

Environment

VCF 4.x
VCF 5.x

Cause

These alerts often occur when a host fails, and vSphere HA attempts to restart a VM that was already powered off.

Resolution

​​To resolve this issue:

  1. Re-configure vSphere HA to clear the alerts.
  2. Refer to https://knowledge.broadcom.com/external/article?legacyId=83726 for detailed instructions on resolving vSphere HA alerts.
  3. Once alerts are cleared, retry the ESXi upgrade.
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