Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+========
+Dumpling
+========
+
+Dumpling is the 4th stable release of Ceph.  It is named after the
+dumpling squid (Euprymna tasmanica).
+
+v0.67.12 "Dumpling" (draft)
+===========================
+
+This stable update for Dumpling fixes a few longstanding issues with
+backfill in the OSD that can lead to stalled IOs.  There is also a fix
+for memory utilization for reads in librbd when caching is enabled,
+and then several other small fixes across the rest of the system.
+
+Dumpling users who have encountered IO stalls during backfill and who
+do not expect to upgrade to Firefly soon should upgrade.  Everyone
+else should upgrade to Firefly already.  This is likely to be the last stable
+release for the 0.67.x Dumpling series.
+
+
+Notable Changes
+---------------
+
+* buffer: fix buffer rebuild alignment corner case (#6614 #6003 Loic Dachary, Samuel Just)
+* ceph-disk: reprobe partitions after zap (#9665 #9721 Loic Dachary)
+* ceph-disk: use partx instead of partprobe when appropriate (Loic Dachary)
+* common: add $cctid meta variable (#6228 Adam Crume)
+* crush: fix get_full_location_ordered (Sage Weil)
+* crush: pick ruleset id that matches rule_id (#9675 Xiaoxi Chen)
+* libcephfs: fix tid wrap bug (#9869 Greg Farnum)
+* libcephfs: get osd location on -1 should return EINVAL (Sage Weil)
+* librados: fix race condition with C API and op timeouts (#9582 Sage Weil)
+* librbd: constrain max number of in-flight read requests (#9854 Jason Dillaman)
+* librbd: enforce cache size on read requests (Jason Dillaman)
+* librbd: fix invalid close in image open failure path (#10030 Jason Dillaman)
+* librbd: fix read hang on sparse files (Jason Dillaman)
+* librbd: gracefully handle deleted/renamed pools (#10270 #10122 Jason Dillaman)
+* librbd: protect list_children from invalid child pool ioctxs (#10123 Jason Dillaman)
+* mds: fix ctime updates from clients without dirty caps (#9514 Greg Farnum)
+* mds: fix rare NULL dereference in cap update path (Greg Farnum)
+* mds: fix assertion caused by system clock backwards (#11053 Yan, Zheng)
+* mds: store backtrace on straydir (Yan, Zheng)
+* osd: fix journal committed_thru update after replay (#6756 Samuel Just)
+* osd: fix memory leak, busy loop on snap trim (#9113 Samuel Just)
+* osd: fix misc peering, recovery bugs (#10168 Samuel Just)
+* osd: fix purged_snap field on backfill start (#9487 Sage Weil, Samuel Just)
+* osd: handle no-op write with snapshot corner case (#10262 Sage Weil, Loic Dachary)
+* osd: respect RWORDERED rados flag (Sage Weil)
+* osd: several backfill fixes and refactors (Samuel Just, David Zafman)
+* rgw: send http status reason explicitly in fastcgi (Yehuda Sadeh)
+
+v0.67.11 "Dumpling"
+===================
+
+This stable update for Dumpling fixes several important bugs that
+affect a small set of users.
+
+We recommend that all Dumpling users upgrade at their convenience.  If
+none of these issues are affecting your deployment there is no
+urgency.
+
+
+Notable Changes
+---------------
+
+* common: fix sending dup cluster log items (#9080 Sage Weil)
+* doc: several doc updates (Alfredo Deza)
+* libcephfs-java: fix build against older JNI headesr (Greg Farnum)
+* librados: fix crash in op timeout path (#9362 Matthias Kiefer, Sage Weil)
+* librbd: fix crash using clone of flattened image (#8845 Josh Durgin)
+* librbd: fix error path cleanup when failing to open image (#8912 Josh Durgin)
+* mon: fix crash when adjusting pg_num before any OSDs are added (#9052 Sage Weil)
+* mon: reduce log noise from paxos (Aanchal Agrawal, Sage Weil)
+* osd: allow scrub and snap trim thread pool IO priority to be adjusted (Sage Weil)
+* osd: fix mount/remount sync race (#9144 Sage Weil)
+
+
+v0.67.10 "Dumpling"
+===================
+
+This stable update release for Dumpling includes primarily fixes for
+RGW, including several issues with bucket listings and a potential
+data corruption problem when multiple multi-part uploads race.  There is also
+some throttling capability added in the OSD for scrub that can mitigate the
+performance impact on production clusters.
+
+We recommend that all Dumpling users upgrade at their convenience.
+
+Notable Changes
+---------------
+
+* ceph-disk: partprobe befoere settle, fixing dm-crypt (#6966, Eric Eastman)
+* librbd: add invalidate cache interface (Josh Durgin)
+* librbd: close image if remove_child fails (Ilya Dryomov)
+* librbd: fix potential null pointer dereference (Danny Al-Gaaf)
+* librbd: improve writeback checks, performance (Haomai Wang)
+* librbd: skip zeroes when copying image (#6257, Josh Durgin)
+* mon: fix rule(set) check on 'ceph pool set ... crush_ruleset ...' (#8599, John Spray)
+* mon: shut down if mon is removed from cluster (#6789, Joao Eduardo Luis)
+* osd: fix filestore perf reports to mon (Sage Weil)
+* osd: force any new or updated xattr into leveldb if E2BIG from XFS (#7779, Sage Weil)
+* osd: lock snapdir object during write to fix race with backfill (Samuel Just)
+* osd: option sleep during scrub (Sage Weil)
+* osd: set io priority on scrub and snap trim threads (Sage Weil)
+* osd: 'status' admin socket command (Sage Weil)
+* rbd: tolerate missing NULL terminator on block_name_prefix (#7577, Dan Mick)
+* rgw: calculate user manifest (#8169, Yehuda Sadeh)
+* rgw: fix abort on chunk read error, avoid using extra memory (#8289, Yehuda Sadeh)
+* rgw: fix buffer overflow on bucket instance id (#8608, Yehuda Sadeh)
+* rgw: fix crash in swift CORS preflight request (#8586, Yehuda Sadeh)
+* rgw: fix implicit removal of old objects on object creation (#8972, Patrycja Szablowska, Yehuda Sadeh)
+* rgw: fix MaxKeys in bucket listing (Yehuda Sadeh)
+* rgw: fix race with multiple updates to a single multipart object (#8269, Yehuda Sadeh)
+* rgw: improve bucket listing with delimiter (Yehuda Sadeh)
+* rgw: include NextMarker in bucket listing (#8858, Yehuda Sadeh)
+* rgw: return error early on non-existent bucket (#7064, Yehuda Sadeh)
+* rgw: set truncation flag correctly in bucket listing (Yehuda Sadeh)
+* sysvinit: continue starting daemons after pre-mount error (#8554, Sage Weil)
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.10.txt>`.
+
+
+v0.67.9 "Dumpling"
+==================
+
+This Dumpling point release fixes several minor bugs. The most
+prevalent in the field is one that occasionally prevents OSDs from
+starting on recently created clusters.
+
+We recommend that all Dumpling users upgrade at their convenience.
+
+Notable Changes
+---------------
+
+* ceph-fuse, libcephfs: client admin socket command to kick and inspect MDS sessions (#8021, Zheng Yan)
+* monclient: fix failure detection during mon handshake (#8278, Sage Weil)
+* mon: set tid on no-op PGStatsAck messages (#8280, Sage Weil)
+* msgr: fix a rare bug with connection negotiation between OSDs (Guang Yang)
+* osd: allow snap trim throttling with simple delay (#6278, Sage Weil)
+* osd: check for splitting when processing recover/backfill reservations (#6565, Samuel Just)
+* osd: fix backfill position tracking (#8162, Samuel Just)
+* osd: fix bug in backfill stats (Samuel Just)
+* osd: fix bug preventing OSD startup for infant clusters (#8162, Greg Farnum)
+* osd: fix rare PG resurrection race causing an incomplete PG (#7740, Samuel Just)
+* osd: only complete replicas count toward min_size (#7805, Samuel Just)
+* rgw: allow setting ACLs with empty owner (#6892, Yehuda Sadeh)
+* rgw: send user manifest header field (#8170, Yehuda Sadeh)
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.9.txt>`.
+
+
+v0.67.8 "Dumpling"
+==================
+
+This Dumpling point release fixes several non-critical issues since
+v0.67.7.  The most notable bug fixes are an auth fix in librbd
+(observed as an occasional crash from KVM), an improvement in the
+network failure detection with the monitor, and several hard to hit
+OSD crashes or hangs.
+
+We recommend that all users upgrade at their convenience.
+
+Upgrading
+---------
+
+* The 'rbd ls' function now returns success and returns an empty when a pool
+  does not store any rbd images.  Previously it would return an ENOENT error.
+
+* Ceph will now issue a health warning if the 'mon osd down out
+  interval' config option is set to zero.  This warning can be
+  disabled by adding 'mon warn on osd down out interval zero = false'
+  to ceph.conf.
+
+Notable Changes
+---------------
+
+* all: improve keepalive detection of failed monitor connections (#7888, Sage Weil)
+* ceph-fuse, libcephfs: pin inodes during readahead, fixing rare crash (#7867, Sage Weil)
+* librbd: make cache writeback a bit less aggressive (Sage Weil)
+* librbd: make symlink for qemu to detect librbd in RPM (#7293, Josh Durgin)
+* mon: allow 'hashpspool' pool flag to be set and unset (Loic Dachary)
+* mon: commit paxos state only after entire quorum acks, fixing rare race where prior round state is readable (#7736, Sage Weil)
+* mon: make elections and timeouts a bit more robust (#7212, Sage Weil)
+* mon: prevent extreme pool split operations (Greg Farnum)
+* mon: wait for quorum for get_version requests to close rare pool creation race (#7997, Sage Weil)
+* mon: warn on 'mon osd down out interval = 0' (#7784, Joao Luis)
+* msgr: fix byte-order for auth challenge, fixing auth errors on big-endian clients (#7977, Dan Mick)
+* msgr: fix occasional crash in authentication code (usually triggered by librbd) (#6840, Josh Durgin)
+* msgr: fix rebind() race (#6992, Xihui He)
+* osd: avoid timeouts during slow PG deletion (#6528, Samuel Just)
+* osd: fix bug in pool listing during recovery (#6633, Samuel Just)
+* osd: fix queue limits, fixing recovery stalls (#7706, Samuel Just)
+* osd: fix rare peering crashes (#6722, #6910, Samuel Just)
+* osd: fix rare recovery hang (#6681, Samuel Just)
+* osd: improve error handling on journal errors (#7738, Sage Weil)
+* osd: reduce load on the monitor from OSDMap subscriptions (Greg Farnum)
+* osd: rery GetLog on peer osd startup, fixing some rare peering stalls (#6909, Samuel Just)
+* osd: reset journal state on remount to fix occasional crash on OSD startup (#8019, Sage Weil)
+* osd: share maps with peers more aggressively (Greg Farnum)
+* rbd: make it harder to delete an rbd image that is currently in use (#7076, Ilya Drymov)
+* rgw: deny writes to secondary zone by non-system users (#6678, Yehuda Sadeh)
+* rgw: do'nt log system requests in usage log (#6889, Yehuda Sadeh)
+* rgw: fix bucket recreation (#6951, Yehuda Sadeh)
+* rgw: fix Swift range response (#7099, Julien Calvet, Yehuda Sadeh)
+* rgw: fix URL escaping (#8202, Yehuda Sadeh)
+* rgw: fix whitespace trimming in http headers (#7543, Yehuda Sadeh)
+* rgw: make multi-object deletion idempotent (#7346, Yehuda Sadeh)
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.8.txt>`.
+
+v0.67.7 "Dumpling"
+==================
+
+This Dumpling point release fixes a few critical issues in v0.67.6.
+
+All v0.67.6 users are urgently encouraged to upgrade.  We also
+recommend that all v0.67.5 (or older) users upgrade.
+
+Upgrading
+---------
+
+* Once you have upgraded a radosgw instance or OSD to v0.67.7, you should not
+  downgrade to a previous version.
+
+Notable Changes
+---------------
+
+* ceph-disk: additional unit tests
+* librbd: revert caching behavior change in v0.67.6
+* osd: fix problem reading xattrs due to incomplete backport in v0.67.6
+* radosgw-admin: fix reading object policy
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.7.txt>`.
+
+
+v0.67.6 "Dumpling"
+==================
+
+.. note: This release contains a librbd bug that is fixed in v0.67.7.  Please upgrade to v0.67.7 and do not use v0.67.6.
+
+This Dumpling point release contains a number of important fixed for
+the OSD, monitor, and radosgw.  Most significantly, a change that
+forces large object attributes to spill over into leveldb has been
+backported that can prevent objects and the cluster from being damaged
+by large attributes (which can be induced via the radosgw).  There is
+also a set of fixes that improves data safety and RADOS semantics when
+the cluster becomes full and then non-full.
+
+We recommend that all 0.67.x Dumpling users skip this release and upgrade to v0.67.7.
+
+Upgrading
+---------
+
+* The OSD has long contained a feature that allows large xattrs to
+  spill over into the leveldb backing store in situations where not
+  all local file systems are able to store them reliably.  This option
+  is now enabled unconditionally in order to avoid rare cases where
+  storing large xattrs renders the object unreadable. This is known to
+  be triggered by very large multipart objects, but could be caused by
+  other workloads as well.  Although there is some small risk that
+  performance for certain workloads will degrade, it is more important
+  that data be retrievable.  Note that newer versions of Ceph (e.g.,
+  firefly) do some additional work to avoid the potential performance
+  regression in this case, but that is current considered too complex
+  for backport to the Dumpling stable series.
+
+* It is very dangerous to downgrade from v0.67.6 to a prior version of
+  Dumpling.  If the old version does not have 'filestore xattr use
+  omap = true' it may not be able to read all xattrs for an object and
+  can cause undefined behavior.
+
+Notable changes
+---------------
+
+* ceph-disk: misc bug fixes, particularly on RHEL (Loic Dachary, Alfredo Deza, various)
+* ceph-fuse, libcephfs: fix crash from read over certain sparseness patterns (Sage Weil)
+* ceph-fuse, libcephfs: fix integer overflow for sync reads racing with appends (Sage Weil)
+* ceph.spec: fix udev rule when building RPM under RHEL (Derek Yarnell)
+* common: fix crash from bad format from admin socket (Loic Dachary)
+* librados: add optional timeouts (Josh Durgin)
+* librados: do not leak budget when resending localized or redirected ops (Josh Durgin)
+* librados, osd: fix and improve full cluster handling (Josh Durgin)
+* librbd: fix use-after-free when updating perfcounters during image close (Josh Durgin)
+* librbd: remove limit on objects in cache (Josh Durgin)
+* mon: avoid on-disk full OSDMap corruption from pg_temp removal (Sage Weil)
+* mon: avoid stray pg_temp entries from pool deletion race (Joao Eduardo Luis)
+* mon: do not generate spurious MDSMaps from laggy daemons (Joao Eduardo Luis)
+* mon: fix error code from 'osd rm|down|out|in ...' commands (Loic Dachary)
+* mon: include all health items in summary output (John Spray)
+* osd: fix occasional race/crash during startup (Sage Weil)
+* osd: ignore stray OSDMap messages during init (Sage Weil)
+* osd: unconditionally let xattrs overflow into leveldb (David Zafman)
+* rados: fix a few error checks for the CLI (Josh Durgin)
+* rgw: convert legacy bucket info objects on demand (Yehuda Sadeh)
+* rgw: fix bug causing system users to lose privileges (Yehuda Sadeh)
+* rgw: fix CORS bugs related to headers and case sensitivity (Robin H. Johnson)
+* rgw: fix multipart object listing (Yehuda Sadeh)
+* rgw: fix racing object creations (Yehuda Sadeh)
+* rgw: fix racing object put and delete (Yehuda Sadeh)
+* rgw: fix S3 auth when using response-* query string params (Sylvain Munaut)
+* rgw: use correct secret key for POST authentication (Robin H. Johnson)
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.6.txt>`.
+
+
+v0.67.5 "Dumpling"
+==================
+
+This release includes a few critical bug fixes for the radosgw,
+including a fix for hanging operations on large objects.  There are also
+several bug fixes for radosgw multi-site replications, and a few
+backported features.  Also, notably, the 'osd perf' command (which dumps
+recent performance information about active OSDs) has been backported.
+
+We recommend that all 0.67.x Dumpling users upgrade.
+
+Notable changes
+---------------
+
+* ceph-fuse: fix crash in caching code
+* mds: fix looping in populate_mydir()
+* mds: fix standby-replay race
+* mon: accept 'osd pool set ...' as string
+* mon: backport: 'osd perf' command to dump recent OSD performance stats
+* osd: add feature compat check for upcoming object sharding
+* osd: fix osd bench block size argument
+* rbd.py: increase parent name size limit
+* rgw: backport: allow wildcard in supported keystone roles
+* rgw: backport: improve swift COPY behavior
+* rgw: backport: log and open admin socket by default
+* rgw: backport: validate S3 tokens against keystone
+* rgw: fix bucket removal
+* rgw: fix client error code for chunked PUT failure
+* rgw: fix hang on large object GET
+* rgw: fix rare use-after-free
+* rgw: various DR bug fixes
+* sysvinit, upstart: prevent starting daemons using both init systems
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.5.txt>`.
+
+
+v0.67.4 "Dumpling"
+==================
+
+This point release fixes an important performance issue with radosgw,
+keystone authentication token caching, and CORS.  All users
+(especially those of rgw) are encouraged to upgrade.
+
+Notable changes
+---------------
+
+* crush: fix invalidation of cached names
+* crushtool: do not crash on non-unique bucket ids
+* mds: be more careful when decoding LogEvents
+* mds: fix heap check debugging commands
+* mon: avoid rebuilding old full osdmaps
+* mon: fix 'ceph crush move ...'
+* mon: fix 'ceph osd crush reweight ...'
+* mon: fix writeout of full osdmaps during trim
+* mon: limit size of transactions
+* mon: prevent both unmanaged and pool snaps
+* osd: disable xattr size limit (prevents upload of large rgw objects)
+* osd: fix recovery op throttling
+* osd: fix throttling of log messages for very slow requests
+* rgw: drain pending requests before completing write
+* rgw: fix CORS
+* rgw: fix inefficient list::size() usage
+* rgw: fix keystone token expiration
+* rgw: fix minor memory leaks
+* rgw: fix null termination of buffer
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.4.txt>`.
+
+
+v0.67.3 "Dumpling"
+==================
+
+This point release fixes a few important performance regressions with
+the OSD (both with CPU and disk utilization), as well as several other
+important but less common problems.  We recommend that all production users
+upgrade.
+
+Notable Changes
+---------------
+
+* ceph-disk: partprobe after creation journal partition
+* ceph-disk: specify fs type when mounting
+* ceph-post-file: new utility to help share logs and other files with ceph developers
+* libcephfs: fix truncate vs readahead race (crash)
+* mds: fix flock/fcntl lock deadlock
+* mds: fix rejoin loop when encountering pre-dumpling backpointers
+* mon: allow name and addr discovery during election stage
+* mon: always refresh after Paxos store_state (fixes recovery corner case)
+* mon: fix off-by-4x bug with osd byte counts
+* osd: add and disable 'pg log keys debug' by default
+* osd: add option to disable throttling
+* osd: avoid leveldb iterators for pg log append and trim
+* osd: fix readdir_r invocations
+* osd: use fdatasync instead of sync
+* radosgw: fix sysvinit script return status
+* rbd: relicense as LGPL2
+* rgw: flush pending data on multipart upload
+* rgw: recheck object name during S3 POST
+* rgw: reorder init/startup
+* rpm: fix debuginfo package build
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.3.txt>`.
+
+
+v0.67.2 "Dumpling"
+==================
+
+This is an important point release for Dumpling.  Most notably, it
+fixes a problem when upgrading directly from v0.56.x Bobtail to
+v0.67.x Dumpling (without stopping at v0.61.x Cuttlefish along the
+way).  It also fixes a problem with the CLI parsing of the CEPH_ARGS
+environment variable, high CPU utilization by the ceph-osd daemons,
+and cleans up the radosgw shutdown sequence.
+
+Notable Changes
+---------------
+
+* objecter: resend linger requests when cluster goes from full to non-full
+* ceph: parse CEPH_ARGS environment variable
+* librados: fix small memory leak
+* osd: remove old log objects on upgrade (fixes bobtail -> dumpling jump)
+* osd: disable PGLog::check() via config option (fixes CPU burn)
+* rgw: drain requests on shutdown
+* rgw: misc memory leaks on shutdown
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.2.txt>`.
+
+
+v0.67.1 "Dumpling"
+==================
+
+This is a minor point release for Dumpling that fixes problems with
+OpenStack and librbd hangs when caching is disabled.
+
+Notable changes
+---------------
+
+* librados, librbd: fix constructor for python bindings with certain
+  usages (in particular, that used by OpenStack)
+* librados, librbd: fix aio_flush wakeup when cache is disabled
+* librados: fix locking for aio completion refcounting
+* fixes 'ceph --admin-daemon ...' command error code on error
+* fixes 'ceph daemon ... config set ...' command for boolean config
+  options.
+
+For more detailed information, see :download:`the complete changelog <../changelog/v0.67.1.txt>`.
+
+v0.67 "Dumpling"
+================
+
+This is the fourth major release of Ceph, code-named "Dumpling."  The
+headline features for this release include:
+
+* Multi-site support for radosgw.  This includes the ability to set up
+  separate "regions" in the same or different Ceph clusters that share
+  a single S3/Swift bucket/container namespace.
+
+* RESTful API endpoint for Ceph cluster administration.
+  ceph-rest-api, a wrapper around ceph_rest_api.py, can be used to
+  start up a test single-threaded HTTP server that provides access to
+  cluster information and administration in very similar ways to the
+  ceph commandline tool.  ceph_rest_api.py can be used as a WSGI
+  application for deployment in a more-capable web server.  See
+  ceph-rest-api.8 for more.
+
+* Object namespaces in librados.
+
+
+.. _dumpling-upgrade:
+
+Upgrade Sequencing
+------------------
+
+It is possible to do a rolling upgrade from Cuttlefish to Dumpling.
+
+#. Upgrade ceph-common on all nodes that will use the command line
+   'ceph' utility.
+#. Upgrade all monitors (upgrade ceph package, restart ceph-mon
+   daemons).  This can happen one daemon or host at a time.  Note that
+   because cuttlefish and dumpling monitors can't talk to each other,
+   all monitors should be upgraded in relatively short succession to
+   minimize the risk that an a untimely failure will reduce
+   availability.
+#. Upgrade all osds (upgrade ceph package, restart ceph-osd daemons).
+   This can happen one daemon or host at a time.
+#. Upgrade radosgw (upgrade radosgw package, restart radosgw daemons).
+
+
+Upgrading from v0.66
+--------------------
+
+* There is monitor internal protocol change, which means that v0.67
+  ceph-mon daemons cannot talk to v0.66 or older daemons.  We
+  recommend upgrading all monitors at once (or in relatively quick
+  succession) to minimize the possibility of downtime.
+
+* The output of 'ceph status --format=json' or 'ceph -s --format=json'
+  has changed to return status information in a more structured and
+  usable format.
+
+* The 'ceph pg dump_stuck [threshold]' command used to require a
+  --threshold or -t prefix to the threshold argument, but now does
+  not.
+
+* Many more ceph commands now output formatted information; select
+  with '--format=<format>', where <format> can be 'json', 'json-pretty',
+  'xml', or 'xml-pretty'.
+
+* The 'ceph pg <pgid> ...' commands (like 'ceph pg <pgid> query') are
+  deprecated in favor of 'ceph tell <pgid> ...'.  This makes the
+  distinction between 'ceph pg <command> <pgid>' and 'ceph pg <pgid>
+  <command>' less awkward by making it clearer that the 'tell'
+  commands are talking to the OSD serving the placement group, not the
+  monitor.
+
+* The 'ceph --admin-daemon <path> <command ...>' used to accept the
+  command and arguments as either a single string or as separate
+  arguments.  It will now only accept the command spread across
+  multiple arguments.  This means that any script which does something
+  like::
+
+    ceph --admin-daemon /var/run/ceph/ceph-osd.0.asok 'config set debug_ms 1'
+
+  needs to remove the quotes.  Also, note that the above can now be
+  shortened to::
+
+    ceph daemon osd.0 config set debug_ms 1
+
+* The radosgw caps were inconsistently documented to be either 'mon =
+  allow r' or 'mon = allow rw'.  The 'mon = allow rw' is required for
+  radosgw to create its own pools.  All documentation has been updated
+  accordingly.
+
+* The radosgw copy object operation may return extra progress info
+  during the operation. At this point it will only happen when doing
+  cross zone copy operations. The S3 response will now return extra
+  <Progress> field under the <CopyResult> container. The Swift
+  response will now send the progress as a json array.
+
+* In v0.66 and v0.65 the HASHPSPOOL pool flag was enabled by default
+  for new pools, but has been disabled again until Linux kernel client
+  support reaches more distributions and users.
+
+* ceph-osd now requires a max file descriptor limit (e.g., ``ulimit -n
+  ...``) of at least
+  filestore_wbthrottle_(xfs|btrfs)_inodes_hard_limit (5000 by default)
+  in order to accommodate the new write back throttle system.  On
+  Ubuntu, upstart now sets the fd limit to 32k.  On other platforms,
+  the sysvinit script will set it to 32k by default (still
+  overridable via max_open_files).  If this field has been customized
+  in ceph.conf it should likely be adjusted upwards.
+
+Upgrading from v0.61 "Cuttlefish"
+---------------------------------
+
+In addition to the above notes about upgrading from v0.66:
+
+* There has been a huge revamp of the 'ceph' command-line interface
+  implementation.  The ``ceph-common`` client library needs to be
+  upgrade before ``ceph-mon`` is restarted in order to avoid problems
+  using the CLI (the old ``ceph`` client utility cannot talk to the
+  new ``ceph-mon``).
+
+* The CLI is now very careful about sending the 'status' one-liner
+  output to stderr and command output to stdout.  Scripts relying on
+  output should take care.
+
+* The 'ceph osd tell ...' and 'ceph mon tell ...' commands are no
+  longer supported.  Any callers should use::
+
+   ceph tell osd.<id or *> ...
+   ceph tell mon.<id or name or *> ...
+
+  The 'ceph mds tell ...' command is still there, but will soon also
+  transition to 'ceph tell mds.<id or name or \*> ...'
+
+* The 'ceph osd crush add ...' command used to take one of two forms::
+
+    ceph osd crush add 123 osd.123 <weight> <location ...>
+    ceph osd crush add osd.123 <weight> <location ...>
+
+  This is because the id and crush name are redundant.  Now only the
+  simple form is supported, where the osd name/id can either be a bare
+  id (integer) or name (osd.<id>)::
+
+    ceph osd crush add osd.123 <weight> <location ...>
+    ceph osd crush add 123 <weight> <location ...>
+
+* There is now a maximum RADOS object size, configurable via 'osd max
+  object size', defaulting to 100 GB.  Note that this has no effect on
+  RBD, CephFS, or radosgw, which all stripe over objects. If you are
+  using librados and storing objects larger than that, you will need
+  to adjust 'osd max object size', and should consider using smaller
+  objects instead.
+
+* The 'osd min down {reporters|reports}' config options have been
+  renamed to 'mon osd min down {reporters|reports}', and the
+  documentation has been updated to reflect that these options apply
+  to the monitors (who process failure reports) and not OSDs.  If you
+  have adjusted these settings, please update your ``ceph.conf``
+  accordingly.
+
+
+Notable changes since v0.66
+---------------------------
+
+* mon: sync improvements (performance and robustness)
+* mon: many bug fixes (paxos and services)
+* mon: fixed bugs in recovery and io rate reporting (negative/large values)
+* mon: collect metadata on osd performance
+* mon: generate health warnings from slow or stuck requests
+* mon: expanded --format=<json|xml|...> support for monitor commands
+* mon: scrub function for verifying data integrity
+* mon, osd: fix old osdmap trimming logic
+* mon: enable leveldb caching by default
+* mon: more efficient storage of PG metadata
+* ceph-rest-api: RESTful endpoint for administer cluster (mirrors CLI)
+* rgw: multi-region support
+* rgw: infrastructure to support georeplication of bucket and user metadata
+* rgw: infrastructure to support georeplication of bucket data
+* rgw: COPY object support between regions
+* rbd: /etc/ceph/rbdmap file for mapping rbd images on startup
+* osd: many bug fixes
+* osd: limit number of incremental osdmaps sent to peers (could cause osds to be wrongly marked down)
+* osd: more efficient small object recovery
+* osd, librados: support for object namespaces
+* osd: automatically enable xattrs on leveldb as necessary
+* mds: fix bug in LOOKUPINO (used by nfs reexport)
+* mds: fix O_TRUNC locking
+* msgr: fixed race condition in inter-osd network communication
+* msgr: fixed various memory leaks related to network sessions
+* ceph-disk: fixes for unusual device names, partition detection
+* hypertable: fixes for hypertable CephBroker bindings
+* use SSE4.2 crc32c instruction if present
+
+
+Notable changes since v0.61 "Cuttlefish"
+----------------------------------------
+
+* add 'config get' admin socket command
+* ceph-conf: --show-config-value now reflects daemon defaults
+* ceph-disk: add '[un]suppress-active DEV' command
+* ceph-disk: avoid mounting over an existing osd in /var/lib/ceph/osd/*
+* ceph-disk: fixes for unusual device names, partition detection
+* ceph-disk: improved handling of odd device names
+* ceph-disk: many fixes for RHEL/CentOS, Fedora, wheezy
+* ceph-disk: simpler, more robust locking
+* ceph-fuse, libcephfs: fix a few caps revocation bugs
+* ceph-fuse, libcephfs: fix read zeroing at EOF
+* ceph-fuse, libcephfs: fix request refcounting bug (hang on shutdown)
+* ceph-fuse, libcephfs: fix truncatation bug on >4MB files (Yan, Zheng)
+* ceph-fuse, libcephfs: fix for cap release/hang
+* ceph-fuse: add ioctl support
+* ceph-fuse: fixed long-standing O_NOATIME vs O_LAZY bug
+* ceph-rest-api: RESTful endpoint for administer cluster (mirrors CLI)
+* ceph, librados: fix resending of commands on mon reconnect
+* daemons: create /var/run/ceph as needed
+* debian wheezy: fix udev rules
+* debian, specfile: packaging cleanups
+* debian: fix upstart behavior with upgrades
+* debian: rgw: stop daemon on uninstall
+* debian: stop daemons on uninstall; fix dependencies
+* hypertable: fixes for hypertable CephBroker bindings
+* librados python binding cleanups
+* librados python: fix xattrs > 4KB (Josh Durgin)
+* librados: configurable max object size (default 100 GB)
+* librados: new calls to administer the cluster
+* librbd: ability to read from local replicas
+* librbd: locking tests (Josh Durgin)
+* librbd: make default options/features for newly created images (e.g., via qemu-img) configurable
+* librbd: parallelize delete, rollback, flatten, copy, resize
+* many many fixes from static code analysis (Danny Al-Gaaf)
+* mds: fix O_TRUNC locking
+* mds: fix bug in LOOKUPINO (used by nfs reexport)
+* mds: fix rare hang after client restart
+* mds: fix several bugs (Yan, Zheng)
+* mds: many backpointer improvements (Yan, Zheng)
+* mds: many fixes for mds clustering
+* mds: misc stability fixes (Yan, Zheng, Greg Farnum)
+* mds: new robust open-by-ino support (Yan, Zheng)
+* mds: support robust lookup by ino number (good for NFS) (Yan, Zheng)
+* mon, ceph: huge revamp of CLI and internal admin API. (Dan Mick)
+* mon, osd: fix old osdmap trimming logic
+* mon, osd: many memory leaks fixed
+* mon: better trim/compaction behavior
+* mon: collect metadata on osd performance
+* mon: enable leveldb caching by default
+* mon: expanded --format=<json|xml|...> support for monitor commands
+* mon: fix election timeout
+* mon: fix leveldb compression, trimming
+* mon: fix start fork behavior
+* mon: fix units in 'ceph df' output
+* mon: fix validation of mds ids from CLI commands
+* mon: fixed bugs in recovery and io rate reporting (negative/large values)
+* mon: generate health warnings from slow or stuck requests
+* mon: many bug fixes (paxos and services, sync)
+* mon: many stability fixes (Joao Luis)
+* mon: more efficient storage of PG metadata
+* mon: new --extract-monmap to aid disaster recovery
+* mon: new capability syntax
+* mon: scrub function for verifying data integrity
+* mon: simplify PaxosService vs Paxos interaction, fix readable/writeable checks
+* mon: sync improvements (performance and robustness)
+* mon: tuning, performance improvements
+* msgr: fix various memory leaks
+* msgr: fixed race condition in inter-osd network communication
+* msgr: fixed various memory leaks related to network sessions
+* osd, librados: support for object namespaces
+* osd, mon: optionally dump leveldb transactions to a log
+* osd: automatically enable xattrs on leveldb as necessary
+* osd: avoid osd flapping from asymmetric network failure
+* osd: break blacklisted client watches (David Zafman)
+* osd: close narrow journal race
+* osd: do not use fadvise(DONTNEED) on XFS (data corruption on power cycle)
+* osd: fix for an op ordering bug
+* osd: fix handling for split after upgrade from bobtail
+* osd: fix incorrect mark-down of osds
+* osd: fix internal heartbeart timeouts when scrubbing very large objects
+* osd: fix memory/network inefficiency during deep scrub
+* osd: fixed problem with front-side heartbeats and mixed clusters (David Zafman)
+* osd: limit number of incremental osdmaps sent to peers (could cause osds to be wrongly marked down)
+* osd: many bug fixes
+* osd: monitor both front and back interfaces
+* osd: more efficient small object recovery
+* osd: new writeback throttling (for less bursty write performance) (Sam Just)
+* osd: pg log (re)writes are now vastly more efficient (faster peering) (Sam Just)
+* osd: ping/heartbeat on public and private interfaces
+* osd: prioritize recovery for degraded PGs
+* osd: re-use partially deleted PG contents when present (Sam Just)
+* osd: recovery and peering performance improvements
+* osd: resurrect partially deleted PGs
+* osd: verify both front and back network are working before rejoining cluster
+* rados: clonedata command for cli
+* radosgw-admin: create keys for new users by default
+* rbd: /etc/ceph/rbdmap file for mapping rbd images on startup
+* rgw: COPY object support between regions
+* rgw: fix CORS bugs
+* rgw: fix locking issue, user operation mask,
+* rgw: fix radosgw-admin buckets list (Yehuda Sadeh)
+* rgw: fix usage log scanning for large, untrimmed logs
+* rgw: handle deep uri resources
+* rgw: infrastructure to support georeplication of bucket and user metadata
+* rgw: infrastructure to support georeplication of bucket data
+* rgw: multi-region support
+* sysvinit: fix enumeration of local daemons
+* sysvinit: fix osd crush weight calculation when using -a
+* sysvinit: handle symlinks in /var/lib/ceph/osd/*
+* use SSE4.2 crc32c instruction if present
+
+
+v0.66
+=====
+
+Upgrading
+---------
+
+* There is now a configurable maximum rados object size, defaulting to 100 GB.  If you
+  are using librados and storing objects larger than that, you will need to adjust
+  'osd max object size', and should consider using smaller objects instead.
+
+Notable changes
+---------------
+
+* osd: pg log (re)writes are now vastly more efficient (faster peering) (Sam Just)
+* osd: fixed problem with front-side heartbeats and mixed clusters (David Zafman)
+* mon: tuning, performance improvements
+* mon: simplify PaxosService vs Paxos interaction, fix readable/writeable checks
+* rgw: fix radosgw-admin buckets list (Yehuda Sadeh)
+* mds: support robust lookup by ino number (good for NFS) (Yan, Zheng)
+* mds: fix several bugs (Yan, Zheng)
+* ceph-fuse, libcephfs: fix truncatation bug on >4MB files (Yan, Zheng)
+* ceph/librados: fix resending of commands on mon reconnect
+* librados python: fix xattrs > 4KB (Josh Durgin)
+* librados: configurable max object size (default 100 GB)
+* msgr: fix various memory leaks
+* ceph-fuse: fixed long-standing O_NOATIME vs O_LAZY bug
+* ceph-fuse, libcephfs: fix request refcounting bug (hang on shutdown)
+* ceph-fuse, libcephfs: fix read zeroing at EOF
+* ceph-conf: --show-config-value now reflects daemon defaults
+* ceph-disk: simpler, more robust locking
+* ceph-disk: avoid mounting over an existing osd in /var/lib/ceph/osd/*
+* sysvinit: handle symlinks in /var/lib/ceph/osd/*
+
+
+v0.65
+=====
+
+Upgrading
+---------
+
+* Huge revamp of the 'ceph' command-line interface implementation.
+  The ``ceph-common`` client library needs to be upgrade before
+  ``ceph-mon`` is restarted in order to avoid problems using the CLI
+  (the old ``ceph`` client utility cannot talk to the new
+  ``ceph-mon``).
+
+* The CLI is now very careful about sending the 'status' one-liner
+  output to stderr and command output to stdout.  Scripts relying on
+  output should take care.
+
+* The 'ceph osd tell ...' and 'ceph mon tell ...' commands are no
+  longer supported.  Any callers should use::
+
+    ceph tell osd.<id or *> ...
+    ceph tell mon.<id or name or *> ...
+
+  The 'ceph mds tell ...' command is still there, but will soon also
+  transition to 'ceph tell mds.<id or name or \*> ...'
+
+* The 'ceph osd crush add ...' command used to take one of two forms::
+
+    ceph osd crush add 123 osd.123 <weight> <location ...>
+    ceph osd crush add osd.123 <weight> <location ...>
+
+  This is because the id and crush name are redundant.  Now only the
+  simple form is supported, where the osd name/id can either be a bare
+  id (integer) or name (osd.<id>)::
+
+    ceph osd crush add osd.123 <weight> <location ...>
+    ceph osd crush add 123 <weight> <location ...>
+
+* There is now a maximum RADOS object size, configurable via 'osd max
+  object size', defaulting to 100 GB.  Note that this has no effect on
+  RBD, CephFS, or radosgw, which all stripe over objects.
+
+
+Notable changes
+---------------
+
+* mon, ceph: huge revamp of CLI and internal admin API. (Dan Mick)
+* mon: new capability syntax
+* osd: do not use fadvise(DONTNEED) on XFS (data corruption on power cycle)
+* osd: recovery and peering performance improvements
+* osd: new writeback throttling (for less bursty write performance) (Sam Just)
+* osd: ping/heartbeat on public and private interfaces
+* osd: avoid osd flapping from asymmetric network failure
+* osd: re-use partially deleted PG contents when present (Sam Just)
+* osd: break blacklisted client watches (David Zafman)
+* mon: many stability fixes (Joao Luis)
+* mon, osd: many memory leaks fixed
+* mds: misc stability fixes (Yan, Zheng, Greg Farnum)
+* mds: many backpointer improvements (Yan, Zheng)
+* mds: new robust open-by-ino support (Yan, Zheng)
+* ceph-fuse, libcephfs: fix a few caps revocation bugs
+* librados: new calls to administer the cluster
+* librbd: locking tests (Josh Durgin)
+* ceph-disk: improved handling of odd device names
+* ceph-disk: many fixes for RHEL/CentOS, Fedora, wheezy
+* many many fixes from static code analysis (Danny Al-Gaaf)
+* daemons: create /var/run/ceph as needed
+
+
+v0.64
+=====
+
+Upgrading
+---------
+
+* New pools now have the HASHPSPOOL flag set by default to provide
+  better distribution over OSDs.  Support for this feature was
+  introduced in v0.59 and Linux kernel version v3.9.  If you wish to
+  access the cluster from an older kernel, set the 'osd pool default
+  flag hashpspool = false' option in your ceph.conf prior to creating
+  the cluster or creating new pools.  Note that the presence of any
+  pool in the cluster with the flag enabled will make the OSD require
+  support from all clients.
+
+Notable changes
+---------------
+
+* osd: monitor both front and back interfaces
+* osd: verify both front and back network are working before rejoining cluster
+* osd: fix memory/network inefficiency during deep scrub
+* osd: fix incorrect mark-down of osds
+* mon: fix start fork behavior
+* mon: fix election timeout
+* mon: better trim/compaction behavior
+* mon: fix units in 'ceph df' output
+* mon, osd: misc memory leaks
+* librbd: make default options/features for newly created images (e.g., via qemu-img) configurable
+* mds: many fixes for mds clustering
+* mds: fix rare hang after client restart
+* ceph-fuse: add ioctl support
+* ceph-fuse/libcephfs: fix for cap release/hang
+* rgw: handle deep uri resources
+* rgw: fix CORS bugs
+* ceph-disk: add '[un]suppress-active DEV' command
+* debian: rgw: stop daemon on uninstall
+* debian: fix upstart behavior with upgrades
+
+
+v0.63
+=====
+
+Upgrading
+---------
+
+* The 'osd min down {reporters|reports}' config options have been
+  renamed to 'mon osd min down {reporters|reports}', and the
+  documentation has been updated to reflect that these options apply
+  to the monitors (who process failure reports) and not OSDs.  If you
+  have adjusted these settings, please update your ``ceph.conf``
+  accordingly.
+
+Notable Changes
+---------------
+
+* librbd: parallelize delete, rollback, flatten, copy, resize
+* librbd: ability to read from local replicas
+* osd: resurrect partially deleted PGs
+* osd: prioritize recovery for degraded PGs
+* osd: fix internal heartbeart timeouts when scrubbing very large objects
+* osd: close narrow journal race
+* rgw: fix usage log scanning for large, untrimmed logs
+* rgw: fix locking issue, user operation mask,
+* initscript: fix osd crush weight calculation when using -a
+* initscript: fix enumeration of local daemons
+* mon: several fixes to paxos, sync
+* mon: new --extract-monmap to aid disaster recovery
+* mon: fix leveldb compression, trimming
+* add 'config get' admin socket command
+* rados: clonedata command for cli
+* debian: stop daemons on uninstall; fix dependencies
+* debian wheezy: fix udev rules
+* many many small fixes from coverity scan
+
+
+v0.62
+=====
+
+Notable Changes
+---------------
+
+* mon: fix validation of mds ids from CLI commands
+* osd: fix for an op ordering bug
+* osd, mon: optionally dump leveldb transactions to a log
+* osd: fix handling for split after upgrade from bobtail
+* debian, specfile: packaging cleanups
+* radosgw-admin: create keys for new users by default
+* librados python binding cleanups
+* misc code cleanups