Hi everyone, -- What -- The Ceph Leadership Team[1] is proposing a change of license from *LGPL-2.1* to *LGPL-2.1 or LGPL-3.0* (dual license). The specific changes are described by this pull request: https://github.com/ceph/ceph/pull/22446 If you are a Ceph developer who has contributed code to Ceph and object to this change of license, please let us know, either by replying to this message or by commenting on that pull request. Our plan is to leave the issue open for comment for some period of time and, if no objections are raised that cannot be adequately addressed (via persuasion, code replacement, or whatever) we will move forward with the change. -- Why -- The primary motivation to relicense is a desire to integrate with projects that are licensed under the Apache License version 2.0. Although opinions vary, there are some who argue the the LGPL-2.1 and Apache-2.0 licenses are not fully compatible. We would like to avoid the ambiguity and potential for controversy. Projects we would like to consume that are Apache-2.0 licensed include RocksDB, Seastar, OpenSSL (which is in the process of relicensing to Apache-2.0), and Swagger (swagger.io). Note that some of these are (or could be) dynamically linked or are consumed via a high-level language, and may or may not require a change to LGPL-3.0, but providing the option for LGPL-3.0 will avoid any uncertainty. A few other source files are already incorporated into Ceph that claim an Apache-2.0 license: src/common/deleter.h src/common/sstring.h src/include/cpp-btree The Ceph developers would further like to provide a license option that is more modern than the current LGPL-2.1. LGPL-3.0 includes updated, clarified language around several issues and is widely considered more modern, superior license. Thank you! [1] http://docs.ceph.com/docs/master/governance/#ceph-leadership-team
