If your vSAN cluster uses data-at-rest encryption, and if an error occurs on the ESXi host, the resulting core dump is encrypted to protect customer data. Core dumps that are included in the vm-support package are also encrypted.
Core Dumps on ESXi Hosts
- In most cases, vCenter Server retrieves the key for the host from the KMS and attempts to push the key to the ESXi host after reboot. If the operation is successful, you can generate the vm-support package and you can decrypt or re-encrypt the core dump.
- If vCenter Server cannot connect to the ESXi host, you might be able to retrieve the key from the KMS.
- If the host used a custom key, and that key differs from the key that vCenter Server pushes to the host, you cannot manipulate the core dump. Avoid using custom keys.
Core Dumps and vm-support Packages
Core Dumps on vCenter Server Systems
A core dump on a vCenter Server system is not encrypted. vCenter Server already contains potentially sensitive information. At the minimum, ensure that the vCenter Server is protected. You also might consider turning off core dumps for the vCenter Server system. Other information in log files can help determine the problem.