Updated sanlock packages that fix several bugs and add various enhancements are now available for Red Hat Enterprise Linux 6.
The sanlock packages provide a shared storage lock manager. Hosts with shared access to a block device or a file can use sanlock to synchronize their activities. VDSM and libvirt use sanlock to synchronize access to virtual machine images.
The sanlock packages have been upgraded to upstream version 2.8, which provides a number of bug fixes and enhancements over the previous version, including a new API provided for applications to request the release of a resource. (BZ#960989
Previously, the wdmd daemon did not always select the functional device when some watchdog modules provided two devices. Consequently, wdmd did not work correctly in some instances. A patch has been applied to address this bug, and wdmd now verifies the state of both devices and selects the one that works properly.
With this update, a new API has been provided for applications to verify the status of hosts in a lockspace.
With this update, a new API has been provided for applications to check the status of hosts that are holding a resource lease.
Users of sanlock are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.