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I use an OpenBSD virtual host (VMware guest) for certain cryptography requirements (managing the Quay x509 Root CA, some gpg uses). For convenience and because I don't really have a full time need for this level of crypto, I save this work environment as a VMware Fusion VM (yeah, yeah I know that VMware introduces its own risks, but this is strictly for using the tools rather than a runtime environment).
This page documents some tricks that are useful in setting up and managing OpenBSD.
Encrypting the Filesystem
I store secret keys on this VM image so I would like the filesystem to be encrypted to that it is not easily accessible if somebody gets a copy of the VMDK files.
Here are some terse instructions for making this work:
Test