>=18.0.0 * The RGW policy parser now rejects unknown principals by default. If you are mirroring policies between RGW and AWS, you may wish to set "rgw policy reject invalid principals" to "false". This affects only newly set policies, not policies that are already in place. * RGW's default backend for `rgw_enable_ops_log` changed from RADOS to file. The default value of `rgw_ops_log_rados` is now false, and `rgw_ops_log_file_path` defaults to "/var/log/ceph/ops-log-$cluster-$name.log". * The SPDK backend for BlueStore is now able to connect to an NVMeoF target. Please note that this is not an officially supported feature. * RGW's pubsub interface now returns boolean fields using bool. Before this change, `/topics/` returns "stored_secret" and "persistent" using a string of "true" or "false" with quotes around them. After this change, these fields are returned without quotes so they can be decoded as boolean values in JSON. The same applies to the `is_truncated` field returned by `/subscriptions/`. * RGW's response of `Action=GetTopicAttributes&TopicArn=` REST API now returns `HasStoredSecret` and `Persistent` as boolean in the JSON string encoded in `Attributes/EndPoint`. * All boolean fields previously rendered as string by `rgw-admin` command when the JSON format is used are now rendered as boolean. If your scripts/tools relies on this behavior, please update them accordingly. The impacted field names are: * absolute * add * admin * appendable * bucket_key_enabled * delete_marker * exists * has_bucket_info * high_precision_time * index * is_master * is_prefix * is_truncated * linked * log_meta * log_op * pending_removal * read_only * retain_head_object * rule_exist * start_with_full_sync * sync_from_all * syncstopped * system * truncated * user_stats_sync * RGW: The beast frontend's HTTP access log line uses a new debug_rgw_access configurable. This has the same defaults as debug_rgw, but can now be controlled independently. * RBD: The semantics of compare-and-write C++ API (`Image::compare_and_write` and `Image::aio_compare_and_write` methods) now match those of C API. Both compare and write steps operate only on `len` bytes even if the respective buffers are larger. The previous behavior of comparing up to the size of the compare buffer was prone to subtle breakage upon straddling a stripe unit boundary. * RBD: compare-and-write operation is no longer limited to 512-byte sectors. Assuming proper alignment, it now allows operating on stripe units (4M by default). * RBD: New `rbd_aio_compare_and_writev` API method to support scatter/gather on both compare and write buffers. This compliments existing `rbd_aio_readv` and `rbd_aio_writev` methods. * The 'AT_NO_ATTR_SYNC' macro is deprecated, please use the standard 'AT_STATX_DONT_SYNC' macro. The 'AT_NO_ATTR_SYNC' macro will be removed in the future. * Trimming of PGLog dups is now controlled by the size instead of the version. This fixes the PGLog inflation issue that was happening when the on-line (in OSD) trimming got jammed after a PG split operation. Also, a new off-line mechanism has been added: `ceph-objectstore-tool` got `trim-pg-log-dups` op that targets situations where OSD is unable to boot due to those inflated dups. If that is the case, in OSD logs the "You can be hit by THE DUPS BUG" warning will be visible. Relevant tracker: https://tracker.ceph.com/issues/53729 * RBD: `rbd device unmap` command gained `--namespace` option. Support for namespaces was added to RBD in Nautilus 14.2.0 and it has been possible to map and unmap images in namespaces using the `image-spec` syntax since then but the corresponding option available in most other commands was missing. * RGW: Compression is now supported for objects uploaded with Server-Side Encryption. When both are enabled, compression is applied before encryption. * RGW: the "pubsub" functionality for storing bucket notifications inside Ceph is removed. Together with it, the "pubsub" zone should not be used anymore. The REST operations, as well as radosgw-admin commands for manipulating subscriptions, as well as fetching and acking the notifications are removed as well. In case that the endpoint to which the notifications are sent maybe down or disconnected, it is recommended to use persistent notifications to guarantee the delivery of the notifications. In case the system that consumes the notifications needs to pull them (instead of the notifications be pushed to it), an external message bus (e.g. rabbitmq, Kafka) should be used for that purpose. * RGW: The serialized format of notification and topics has changed, so that new/updated topics will be unreadable by old RGWs. We recommend completing the RGW upgrades before creating or modifying any notification topics. * RBD: Trailing newline in passphrase files (`` argument in `rbd encryption format` command and `--encryption-passphrase-file` option in other commands) is no longer stripped. * RBD: Support for layered client-side encryption is added. Cloned images can now be encrypted each with its own encryption format and passphrase, potentially different from that of the parent image. The efficient copy-on-write semantics intrinsic to unformatted (regular) cloned images are retained. * CEPHFS: Rename the `mds_max_retries_on_remount_failure` option to `client_max_retries_on_remount_failure` and move it from mds.yaml.in to mds-client.yaml.in because this option was only used by MDS client from its birth. * The `perf dump` and `perf schema` commands are deprecated in favor of new `counter dump` and `counter schema` commands. These new commands add support for labeled perf counters and also emit existing unlabeled perf counters. Some unlabeled perf counters may become labeled in future releases and as such will no longer be emitted by the `perf dump` and `perf schema` commands. * `ceph mgr dump` command now outputs `last_failure_osd_epoch` and `active_clients` fields at the top level. Previously, these fields were output under `always_on_modules` field. * `ceph mgr dump` command now displays the name of the mgr module that registered a RADOS client in the `name` field added to elements of the `active_clients` array. Previously, only the address of a module's RADOS client was shown in the `active_clients` array. >=17.2.1 * The "BlueStore zero block detection" feature (first introduced to Quincy in https://github.com/ceph/ceph/pull/43337) has been turned off by default with a new global configuration called `bluestore_zero_block_detection`. This feature, intended for large-scale synthetic testing, does not interact well with some RBD and CephFS features. Any side effects experienced in previous Quincy versions would no longer occur, provided that the configuration remains set to false. Relevant tracker: https://tracker.ceph.com/issues/55521 * telemetry: Added new Rook metrics to the 'basic' channel to report Rook's version, Kubernetes version, node metrics, etc. See a sample report with `ceph telemetry preview`. Opt-in with `ceph telemetry on`. For more details, see: https://docs.ceph.com/en/latest/mgr/telemetry/ * OSD: The issue of high CPU utilization during recovery/backfill operations has been fixed. For more details, see: https://tracker.ceph.com/issues/56530. >=15.2.17 * OSD: Octopus modified the SnapMapper key format from __ to ___ When this change was introduced, 94ebe0e also introduced a conversion with a crucial bug which essentially destroyed legacy keys by mapping them to __ without the object-unique suffix. The conversion is fixed in this release. Relevant tracker: https://tracker.ceph.com/issues/56147 * Cephadm may now be configured to carry out CephFS MDS upgrades without reducing ``max_mds`` to 1. Previously, Cephadm would reduce ``max_mds`` to 1 to avoid having two active MDS modifying on-disk structures with new versions, communicating cross-version-incompatible messages, or other potential incompatibilities. This could be disruptive for large-scale CephFS deployments because the cluster cannot easily reduce active MDS daemons to 1. NOTE: Staggered upgrade of the mons/mgrs may be necessary to take advantage of the feature, refer this link on how to perform it: https://docs.ceph.com/en/quincy/cephadm/upgrade/#staggered-upgrade Relevant tracker: https://tracker.ceph.com/issues/55715 * Introduced a new file system flag `refuse_client_session` that can be set using the `fs set` command. This flag allows blocking any incoming session request from client(s). This can be useful during some recovery situations where it's desirable to bring MDS up but have no client workload. Relevant tracker: https://tracker.ceph.com/issues/57090 * New MDSMap field `max_xattr_size` which can be set using the `fs set` command. This MDSMap field allows to configure the maximum size allowed for the full key/value set for a filesystem extended attributes. It effectively replaces the old per-MDS `max_xattr_pairs_size` setting, which is now dropped. Relevant tracker: https://tracker.ceph.com/issues/55725