v15.2.8 Octopus released

[David Galloway <dgallowa@redhat.com>]

We're happy to announce the 8th backport release in the Octopus series. This release fixes a security flaw in CephFS and includes a number of bug fixes. We recommend users to update to this release. For a detailed release notes with links & changelog please refer to the official blog entry at https://ceph.io/releases/v15-2-8-octopus-released

Notable Changes
---------------

* CVE-2020-27781 : OpenStack Manila use of ceph_volume_client.py library allowed
  tenant access to any Ceph credential's secret. (Kotresh Hiremath Ravishankar,
  Ramana Raja)

* ceph-volume: The `lvm batch` subcommand received a major rewrite. This closed
  a number of bugs and improves usability in terms of size specification and
  calculation, as well as idempotency behaviour and disk replacement process.
  Please refer to https://docs.ceph.com/en/latest/ceph-volume/lvm/batch/ for
  more detailed information.

* MON: The cluster log now logs health detail every `mon_health_to_clog_interval`,
  which has been changed from 1hr to 10min. Logging of health detail will be
  skipped if there is no change in health summary since last known.

* The `ceph df` command now lists the number of pgs in each pool.

* The `bluefs_preextend_wal_files` option has been removed.

* It is now possible to specify the initial monitor to contact for Ceph tools
  and daemons using the `mon_host_override` config option or
  `--mon-host-override <ip>` command-line switch. This generally should only
  be used for debugging and only affects initial communication with Ceph's
  monitor cluster.

Getting Ceph
------------
* Git at git://github.com/ceph/ceph.git
* Tarball at http://download.ceph.com/tarballs/ceph-15.2.8.tar.gz
* For packages, see http://docs.ceph.com/docs/master/install/get-packages/
* Release git sha1: bdf3eebcd22d7d0b3dd4d5501bee5bac354d5b55