[Ceph-announce] v14.2.8 Nautilus released

This is the eighth update to the Ceph Nautilus release series. This release fixes issues across a range of subsystems. We recommend that all users upgrade to this release. Please note the following important changes in this release; as always the full changelog is posted at: https://ceph.io/releases/v14-2-8-nautilus-released Notable Changes --------------- * The default value of `bluestore_min_alloc_size_ssd` has been changed to 4K to improve performance across all workloads. * The following OSD memory config options related to bluestore cache autotuning can now be configured during runtime: - osd_memory_base (default: 768 MB) - osd_memory_cache_min (default: 128 MB) - osd_memory_expected_fragmentation (default: 0.15) - osd_memory_target (default: 4 GB) The above options can be set with:: ceph config set osd <option> <value> * The MGR now accepts `profile rbd` and `profile rbd-read-only` user caps. These caps can be used to provide users access to MGR-based RBD functionality such as `rbd perf image iostat` an `rbd perf image iotop`. * The configuration value `osd_calc_pg_upmaps_max_stddev` used for upmap balancing has been removed. Instead use the mgr balancer config `upmap_max_deviation` which now is an integer number of PGs of deviation from the target PGs per OSD. This can be set with a command like `ceph config set mgr mgr/balancer/upmap_max_deviation 2`. The default `upmap_max_deviation` is 1. There are situations where crush rules would not allow a pool to ever have completely balanced PGs. For example, if crush requires 1 replica on each of 3 racks, but there are fewer OSDs in 1 of the racks. In those cases, the configuration value can be increased. * RGW: a mismatch between the bucket notification documentation and the actual message format was fixed. This means that any endpoints receiving bucket notification, will now receive the same notifications inside a JSON array named 'Records'. Note that this does not affect pulling bucket notification from a subscription in a 'pubsub' zone, as these are already wrapped inside that array. * CephFS: multiple active MDS forward scrub is now rejected. Scrub currently only is permitted on a file system with a single rank. Reduce the ranks to one via `ceph fs set <fs_name> max_mds 1`. * Ceph now refuses to create a file system with a default EC data pool. For further explanation, see: https://docs.ceph.com/docs/nautilus/cephfs/createfs/#creating-pools * Ceph will now issue a health warning if a RADOS pool has a `pg_num` value that is not a power of two. This can be fixed by adjusting the pool to a nearby power of two:: ceph osd pool set <pool-name> pg_num <new-pg-num> Alternatively, the warning can be silenced with:: ceph config set global mon_warn_on_pool_pg_num_not_power_of_two false Getting Ceph ------------ * Git at git://github.com/ceph/ceph.git * Tarball at http://download.ceph.com/tarballs/ceph-14.2.8.tar.gz * For packages, see http://docs.ceph.com/docs/master/install/get-packages/ * Release git sha1: 2d095e947a02261ce61424021bb43bd3022d35cb -- Abhishek Lekshmanan SUSE Software Solutions Germany GmbH GF: Felix Imendörffer HRB 21284 (AG Nürnberg)