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PendingReleaseNotes
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14.2.1
------
* The default value for `mon_crush_min_required_version` has been
changed from `firefly` to `hammer`, which means the cluster will
issue a health warning if your CRUSH tunables are older than hammer.
There is generally a small (but non-zero) amount of data that will
move around by making the switch to hammer tunables; for more information,
see :ref:`crush-map-tunables`.
If possible, we recommend that you set the oldest allowed client to `hammer`
or later. You can tell what the current oldest allowed client is with::
ceph osd dump | min_compat_client
If the current value is older than hammer, you can tell whether it
is safe to make this change by verifying that there are no clients
older than hammer current connected to the cluster with::
ceph features
The newer `straw2` CRUSH bucket type was introduced in hammer, and
ensuring that all clients are hammer or newer allows new features
only supported for `straw2` buckets to be used, including the
`crush-compat` mode for the :ref:`balancer`.
>=15.0.0
--------
* The RGW "num_rados_handles" has been removed.
* If you were using a value of "num_rados_handles" greater than 1
multiply your current "objecter_inflight_ops" and
"objecter_inflight_op_bytes" paramaeters by the old
"num_rados_handles" to get the same throttle behavior.
* Ceph now packages python bindings for python3.6 instead of
python3.4, because EPEL7 recently switched from python3.4 to
python3.6 as the native python3. see the `announcement <https://lists.fedoraproject.org/archives/list/[email protected]/message/EGUMKAIMPK2UD5VSHXM53BH2MBDGDWMO/>_`
for more details on the background of this change.
* librbd now uses a write-around cache policy be default,
replacing the previous write-back cache policy default.
This cache policy allows librbd to immediately complete
write IOs while they are still in-flight to the OSDs.
Subsequent flush requests will ensure all in-flight
write IOs are completed prior to completing. The
librbd cache policy can be controlled via a new
"rbd_cache_policy" configuration option.
* librbd now includes a simple IO scheduler which attempts to
batch together multiple IOs against the same backing RBD
data block object. The librbd IO scheduler policy can be
controlled via a new "rbd_io_scheduler" configuration
option.
* RGW: radosgw-admin introduces two subcommands that allow the
managing of expire-stale objects that might be left behind after a
bucket reshard in earlier versions of RGW. One subcommand lists such
objects and the other deletes them. Read the troubleshooting section
of the dynamic resharding docs for details.
* RGW: Bucket naming restrictions have changed and likely to cause
InvalidBucketName errors. We recommend to set ``rgw_relaxed_s3_bucket_names``
option to true as a workaround.
* In the Zabbix Mgr Module there was a typo in the key being send
to Zabbix for PGs in backfill_wait state. The key that was sent
was 'wait_backfill' and the correct name is 'backfill_wait'.
Update your Zabbix template accordingly so that it accepts the
new key being send to Zabbix.
* zabbix plugin for ceph manager now includes osd and pool
discovery. Update of zabbix_template.xml is needed
to receive per-pool (read/write throughput, diskspace usage)
and per-osd (latency, status, pgs) statistics
* The format of all date + time stamps has been modified to fully
conform to ISO 8601. The old format (``YYYY-MM-DD
HH:MM:SS.ssssss``) excluded the ``T`` separator between the date and
time and was rendered using the local time zone without any explicit
indication. The new format includes the separator as well as a
``+nnnn`` or ``-nnnn`` suffix to indicate the time zone, or a ``Z``
suffix if the time is UTC. For example,
``2019-04-26T18:40:06.225953+0100``.
Any code or scripts that was previously parsing date and/or time
values from the JSON or XML structure CLI output should be checked
to ensure it can handle ISO 8601 conformant values. Any code
parsing date or time values from the unstructured human-readable
output should be modified to parse the structured output instead, as
the human-readable output may change without notice.
* The ``bluestore_no_per_pool_stats_tolerance`` config option has been
replaced with ``bluestore_fsck_error_on_no_per_pool_stats``
(default: false). The overall default behavior has not changed:
fsck will warn but not fail on legacy stores, and repair will
convert to per-pool stats.
* The ``osd_recovery_max_active`` option now has
``osd_recovery_max_active_hdd`` and ``osd_recovery_max_active_ssd``
variants, each with different default values for HDD and SSD-backed
OSDs, respectively. By default ``osd_recovery_max_active`` now
defaults to zero, which means that the OSD will conditionally use
the HDD or SSD option values. Administrators who have customized
this value may want to consider whether they have set this to a
value similar to the new defaults (3 for HDDs and 10 for SSDs) and,
if so, remove the option from their configuration entirely.
* monitors now have a `ceph osd info` command that will provide information
on all osds, or provided osds, thus simplifying the process of having to
parse `osd dump` for the same information.
* The structured output of ``ceph status`` or ``ceph -s`` is now more
concise, particularly the `mgrmap` and `monmap` sections, and the
structure of the `osdmap` section has been cleaned up.
* A health warning is now generated if the average osd heartbeat ping
time exceeds a configurable threshold for any of the intervals
computed. The OSD computes 1 minute, 5 minute and 15 minute
intervals with average, minimum and maximum values. New configuration
option ``mon_warn_on_slow_ping_ratio`` specifies a percentage of
``osd_heartbeat_grace`` to determine the threshold. A value of zero
disables the warning. New configuration option
``mon_warn_on_slow_ping_time`` specified in milliseconds over-rides the
computed value, causes a warning
when OSD heartbeat pings take longer than the specified amount.
New admin command ``ceph daemon mgr.# dump_osd_network [threshold]`` command will
list all connections with a ping time longer than the specified threshold or
value determined by the config options, for the average for any of the 3 intervals.
New admin command ``ceph daemon osd.# dump_osd_network [threshold]`` will
do the same but only including heartbeats initiated by the specified OSD.
* Following invalid settings now are not tolerated anymore
for the command `ceph osd erasure-code-profile set xxx`.
* invalid `m` for "reed_sol_r6_op" erasure technique
* invalid `m` and invalid `w` for "liber8tion" erasure technique
* New OSD daemon command dump_recovery_reservations which reveals the
recovery locks held (in_progress) and waiting in priority queues.
* New OSD daemon command dump_scrub_reservations which reveals the
scrub reservations that are held for local (primary) and remote (replica) PGs.
* The ``pg_autoscale_mode`` is now set to ``on`` by default for newly
created pools, which means that Ceph will automatically manage the
number of PGs. To change this behavior, or to learn more about PG
autoscaling, see :ref:`pg-autoscaler`. Note that existing pools in
upgraded clusters will still be set to ``warn`` by default.