FailedAttachVolume error appears
If you are performing a migration using Anthos clusters on AWS
to perform the migration,
you might see the
FailedAttachVolume error in the migration status or logs
with the accompanying message of:
"The encrypted volume was unable to access the KMS master key"
This error means that your AWS VM uses an encrypted disk and you have not configured access correctly. See Prerequisites for migrating Linux VMs using AWS processing clusters for more.