We're happy to announce the 4th release in the Reef series. An early build of this release was accidentally exposed and packaged as 18.2.3 by the Debian project in April. That 18.2.3 release should not be used. The official release was re-tagged as v18.2.4 to avoid further confusion. v18.2.4 container images, now based on CentOS 9, may be incompatible on older kernels (e.g., Ubuntu 18.04) due to differences in thread creation methods. Users upgrading to v18.2.4 container images with older OS versions may encounter crashes during `pthread_create`. For workarounds, refer to the related tracker. However, we recommend upgrading your OS to avoid this unsupported combination. Related tracker: https://tracker.ceph.com/issues/66989 We recommend users to update to this release. For detailed release notes with links & changelog please refer to the official blog entry at https://ceph.io/en/news/blog/2024/v18-2-4-reef-released/ Notable Changes --------------- * RADOS: This release fixes a bug (https://tracker.ceph.com/issues/61948) where pre-reef clients were allowed to connect to the `pg-upmap-primary` (https://docs.ceph.com/en/reef/rados/operations/read-balancer/) interface despite users having set `require-min-compat-client=reef`, leading to an assert in the osds and mons. You are susceptible to this bug in reef versions prior to 18.2.3 if 1) you are using an osdmap generated via the offline osdmaptool with the `--read` option or 2) you have explicitly generated pg-upmap-primary mappings with the CLI command. Please note that the fix is minimal and does not address corner cases such as adding a mapping in the middle of an upgrade or in a partially upgraded cluster (related trackers linked in https://tracker.ceph.com/issues/61948). As such, we recommend removing any existing pg-upmap-primary mappings until remaining issues are addressed in future point releases. See https://tracker.ceph.com/issues/61948#note-32 for instructions on how to remove existing pg-upmap-primary mappings. * RBD: When diffing against the beginning of time (`fromsnapname == NULL`) in fast-diff mode (`whole_object == true` with `fast-diff` image feature enabled and valid), diff-iterate is now guaranteed to execute locally if exclusive lock is available. This brings a dramatic performance improvement for QEMU live disk synchronization and backup use cases. * RADOS: `get_pool_is_selfmanaged_snaps_mode` C++ API has been deprecated due to being prone to false negative results. It's safer replacement is `pool_is_in_selfmanaged_snaps_mode`. * RBD: The option ``--image-id`` has been added to `rbd children` CLI command, so it can be run for images in the trash. Related tracker: https://tracker.ceph.com/issues/65393 Getting Ceph ------------ * Git at git://github.com/ceph/ceph.git * Tarball at https://download.ceph.com/tarballs/ceph_18.2.4.orig.tar.gz * Containers at https://quay.io/repository/ceph/ceph * For packages, see https://docs.ceph.com/en/latest/install/get-packages/ * Release git sha1: e7ad5345525c7aa95470c26863873b581076945d