VMware ESXi HA agent failed

If you force problems with reconfigure HA on a ESXi server in a HA Cluster. A possible solution to resolve this is to uninstall the vpxa and the ha-agent. This can be done using the unsupported mode.

Steps:

* set ESXi in Maintenance Mode
* disconnnect ESXi from Virtual Center
* remove ESXi from Virtual Center
* connect with SSH to ESXi or direct using something like HP iLo
* execute the following commands

cd /opt/vmware/uninstallers/
./VMware-aam-ha-uninstall.sh
./VMware-vpxa-uninstall.sh

* add ESXi to Virtual Center
* exit ESXi from Maintenance Mode

* repeat this with all Nodes in the cluster

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