[Unit]
Description=One time configuration for iscsi.service
ConditionPathExists=!/etc/iscsi/initiatorname.iscsi

[Service]
Type=oneshot
RemainAfterExit=no
ExecStart=/usr/bin/sh -c 'echo "InitiatorName=`/usr/sbin/iscsi-iname`" > /etc/iscsi/initiatorname.iscsi'