OpenBSD 6.2 の Vagrant Box を作ってみた ref: https://qiita.com/poad1010/items/5d7d272fe4b4695adb71

file0.txt

echo 'permit vagrant' >>/etc/doas.conf
echo 'permit nopass setenv { PKG_PATH ENV PS1 SSH_AUTH_SOCK } :wheel' >>/etc/doas.conf

file1.txt

doas pkg_add curl

file2.txt

curl --insecure --location "https://raw.githubusercontent.com/mitchellh/vagrant/master/keys/vagrant.pub" -O $HOME_DIR/.ssh/authorized_keys;
chown -R vagrant ~/.ssh;
chmod -R go-rwsx ~/.ssh;

file3.txt

su -
echo 'https://fastly.cdn.openbsd.org/pub/OpenBSD' >> /etc/installurl
exit

file4.txt

su -
dd if=/dev/zero of=/EMPTY bs=1M || echo "dd exit code $? is suppressed";
rm -f /EMPTY;

sync;
exit

Vagrantfile

config.vm.synced_folder ".", "/vagrant", type: "nfs"