Which log is used to see a failed NSX-T installation of a VIB package on ESXi transport nodes?

The log that provides information about a failed NSX-T installation of a VIB package on ESXi transport nodes is the ESXi update log found at /var/log/esxupdate.log. This log specifically tracks updates and installations of VIBs (Virtual Infrastructure Bundles), which are essential components for extending the capabilities of the ESXi host, including those required for NSX-T functionality.

When a VIB installation fails, the esxupdate.log will capture details about the failure, including any error messages or codes that indicate what went wrong during the installation process. This allows administrators to troubleshoot and address issues with VIB installations more effectively, ensuring that the transport nodes can be properly configured and managed using NSX-T.

In contrast, the other logs, while useful for other troubleshooting tasks, do not specifically log VIB installation events. The eam.log logs events related to the vSphere Auto Deploy service, syslog.log captures general system logging information, and hostd.log pertains to host management activities. Thus, they are not suitable for diagnosing issues specifically related to VIB installation failures.