cvmfs 2.3 release notes

cpt-releasenotes.rst

@@ -1,2 +1,105 @@
 Release Notes for CernVM-FS 2.3
 ===============================
+
+CernVM-FS 2.3 comes with performance improvements and several new features and
+bugfixes. We would like to thank Dave Dykstra (FNAL), Brian Bockelman
+(U. Nebraska) and David Abdurachmanov (CERN/CMS) for their contributions to this
+release!
+
+Substantial improvements in this release are:
+
+  * A plugin interface for client-side authorization helpers (see Section
+    :ref:`sct_authz` for details).
+
+  * Reworked data structures for garbage-collectable repositories. Stratum 0 and
+    Stratum 1 servers now keep independent "reference logs" for the objects in
+    their respective storage. That improves the robustness of replicated,
+    garbage-collected repositories in a number of corner cases. The transition
+    to the new data structures takes place automatically on the first GC run
+    after the software upgrade.
+
+  * Official support for manually triggered garbage collection with
+    ``cvmfs_server gc``.
+
+  * Possibility to automatically cleanup older repository tags.  The new
+    server-side parameter ``CVMFS_AUTO_TAG_TIMESPAN`` can be used to control
+    the life time of automatically created repository tags
+    (`CVM-982 <https://sft.its.cern.ch/jira/browse/CVM-982>`_)
+
+  * For the S3 storage backend: removal of the bucket number in the bucket name
+    if only a single bucket is used.
+
+  * Performance improvements and reduced memory footprint for client and server.
+
+  * New platforms: Fedora 24 on x86_64, SLES 12 on x86_64, CentOS 7 on AArch64
+
+As with previous releases, upgrading should be seamless just by installing the
+new package from the repository. As usual, we recommend to update only a few
+worker nodes first and gradually ramp up once the new version proves to work
+correctly. Please take special care when upgrading a cvmfs client in NFS mode.
+
+For Stratum 0 servers, all transactions must be closed before upgrading.  After
+the software upgrade, the directory layout on the release manager needs to be
+adjusted by a call to ``cvmfs_server migrate`` for each repository.
+
+For Stratum 1 server, there should be no running snapshots during the upgrade.
+
+As discussed in the Grid Deployment Board, this release will stay in testing for
+two weeks before being moved to the production repositories.
+
+Please find below the list of bugfixes and smaller improvements.
+
+Bug Fixes
+---------
+
+  * Client: fix rare corruption on NFS maps during mount / reload
+
+  * Client: fix ``mount -t cvmfs -o remount ...``
+    (`CVM-1068 <https://sft.its.cern.ch/jira/browse/CVM-1068>`_)
+
+  * Client: fix potential null pointer dereference for authz extended attribute
+
+  * Client: fix a few small memory leaks during ``cvmfs_config reload``
+
+  * Client: gracefully deal with proxies without http:// prefix
+    (`CVM-1045 <https://sft.its.cern.ch/jira/browse/CVM-1045>`_)
+
+  * Client: fix up ``cvmfs_talk external ...`` commands
+    (`CVM-981 <https://sft.its.cern.ch/jira/browse/CVM-981>`_)
+
+  * Client: prevent fallback proxies from interfering with external data
+    (`CVM-1058 <https://sft.its.cern.ch/jira/browse/CVM-1058>`_)
+
+  * Server: clean environment before calling ``cvmfs_suid_helper``
+
+  * Server: fix a rare crash when parsing the whitelist
+
+  * Server: fix lookup of sbin binaries in the ``cvmfs_server`` script
+
+  * Server: fix false warning on graft files when removing trees on overlayfs
+    (`CVM-932 <https://sft.its.cern.ch/jira/browse/CVM-932>`_)
+
+  * Server: fix ``lsof`` report in ``cvmfs_server`` on newer Linux distributions
+
+  * Server: prevent ``cvmfs_server migrate`` on a repository that is in a
+    transaction
+
+  * Server: reset file capabilities of ``cvmfs_swissknife`` on package update
+    (`CVM-1038 <https://sft.its.cern.ch/jira/browse/CVM-1038>`_)
+
+Improvements
+------------
+
+  * Client: add support for a default.conf in the config repository
+    (`CVM-993 <https://sft.its.cern.ch/jira/browse/CVM-993>`_)
+
+  * Client: improve debuggability with Valgrind
+
+  * Server: add `cvmfs_server mount` command
+    (`CVM-996 <https://sft.its.cern.ch/jira/browse/CVM-996>`_)
+
+  * Server: Warn before forcfully remounting the file system stack, new
+    parameter ``CVMFS_FORCE_REMOUNT_WARNING``
+
+  * Server: add support for ``cvmfs_server publish -f`` to force publishing in
+    the presence of open file descriptors