RHEL 7 will be using the LIO kernel target subsystem for iSCSI and other protocols, instead of the tgtd daemon, aka scsi-target-utils. This is a change from RHEL 6, where we use tgtd for iSCSI target support, and LIO only for FCoE targets, via the fcoe-target-utils package.
Users of tgtd can prepare for RHEL 7 by trying Fedora 17 or 18, which have current LIO/targetcli code. LIO has many features tgtd doesn’t, but LIO also won’t cover 100% of tgtd’s features at first, either. File bugs for these regressions and we’ll work to address them.
Other software that currently uses tgtd may wish to look at the rtslib Python library, and targetcli’s JSON config format — LIO has a nice API so if you find yourself wanting to parse targetcli output, please hold off and email me instead, ok? 🙂
scsi-target-utils will still be available via EPEL for RHEL 7, and supported in RHEL 6 for its lifetime.