Nimm example vars und pass diese an.
Beispiel von openvpn support forum:
# easy-rsa parameter settings

# NOTE: If you installed from an RPM,
# don't edit this file in place in
# /usr/share/openvpn/easy-rsa --
# instead, you should copy the whole
# easy-rsa directory to another location
# (such as /etc/openvpn) so that your
# edits will not be wiped out by a future
# OpenVPN package upgrade.

# This variable should point to
# the top level of the easy-rsa
# tree.
export D=`pwd`

# This variable should point to
# the openssl.cnf file included
# with easy-rsa.
export KEY_CONFIG=$D/openssl.cnf

# Edit this variable to point to
# your soon-to-be-created key
# directory.
#
# WARNING: clean-all will do
# a rm -rf on this directory
# so make sure you define
# it correctly!
export KEY_DIR=$D/keys

# Issue rm -rf warning
echo NOTE: when you run ./clean-all, I will be doing a rm -rf on $KEY_DIR

# Increase this to 2048 if you
# are paranoid. This will slow
# down TLS negotiation performance
# as well as the one-time DH parms
# generation process.
export KEY_SIZE=1024

# These are the default values for fields
# which will be placed in the certificate.
# Don't leave any of these fields blank.
export KEY_COUNTRY=KG
export KEY_PROVINCE=NA
export KEY_CITY=BISHKEK
export KEY_ORG="OpenVPN-TEST"
export KEY_EMAIL="me@myhost.mydomain"