Description of problem:
Libvirt cannot fully support the sanlock lock manager unless augtool is part of RHEL 6.2. See bug 738314
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. yum install libvirt-lock-sanlock
augeas-libs is in RHEL 6.2, but not augeas, which means libvirt-lock-sanlock has a missing dependency
Both augeas and augeas-libs should be in RHEL 6.2.
See also this upstream report:
Both libvirt-lock-sanlock and augeas are now in the optional channel, so all is well.