# Kea 2.6.1 Release Notes, July 31st 2024 Welcome to Kea 2.6.1, a maintenance release of the stable 2.6 series. Kea is a DHCP implementation developed by Internet Systems Consortium (ISC) that features DHCPv4 and DHCPv6 servers with DNS update and a REST API; optional database support (MySQL/MariaDB and PostgreSQL); optional RADIUS, Kerberos, YANG/NETCONF, and GSS-TSIG support; and much more. Kea provides extensive management capabilities, including but not limited to: TLS support, Role-Based Access Control, run-time configuration monitoring and updates via a REST API, host reservations, and client classification. The text below references issue numbers. For more details, visit the Kea GitLab page at https://gitlab.isc.org/isc-projects/kea/-/issues. For details about Docker issues, visit the page at https://gitlab.isc.org/isc-projects/kea-docker/-/issues/. For details about packaging, visit the page at https://gitlab.isc.org/isc-projects/kea-packaging/-/issues/. The following bug fixes have been implemented since the previous stable release, version 2.6.0: 1. **Fix for option types in CB**: We corrected an issue with overlapping enum values for the option definition data type stored in the Configuration Backend (CB). This was causing option definitions of type "record", created via CB commands, to not load properly when fetched from the backend. This change updates DB schemas for both PostgreSQL and MySQL [#3484, backport of #3476]. 2. **Fix for invalid sub-option storage in CB**: We corrected a bug in storing and fetching the encapsulated DHCP options from the CB. These options were sometimes not returned when they were specified at the subnet, shared-network, or client-class level [#3485, backport of #3481]. 3. **PostgreSQL compilation fix**: [#3505, backport of #3436]. 4. **Fix for a file descriptors leak**: We fixed a file descriptor leak in the High Availability hook library [#3486, backport of #3449]. 5. **Fix for remote-class6-get API command**: We corrected an issue in the MySQL CB that caused preferred lifetime values to be overwritten when updating client classes via the `remote-set-class6` command [#3509, backport of #3469]. 6. **CI**: We backported a small fix in the Continuous Integration (CI) that fixed the 2.6 pipeline [#3498]. ## Incompatible Changes None, although a DB schema update is necessary if PostgreSQL or MySQL is used, even if the Configuration Backend (CB) itself is not used. ## Packaging 1. **Native packages**: For convenient installation, Kea is available as native (deb, RPM, and APK) packages for the following systems on Intel/AMD x64 (amd64) and ARM (aarch64) architecture: Alpine 3.16 (amd64), 3.17 (amd64), 3.18 (amd64), 3.19 (amd64, aarch64); RHEL 8 (amd64), 9 (amd64, aarch64); Debian 10 (amd64), 11 (amd64, aarch64), 12 (amd64, aarch64); Fedora 36 (amd64), 38 (amd64), 39 (amd64), 40 (amd64); and Ubuntu 20.04 (amd64), 22.04 (amd64, aarch64), 24.04 (amd64, aarch64). The images are available on Cloudsmith (https://cloudsmith.io/~isc/repos/). 2. **Docker**: Both pre-built Docker images and Docker files are available. Users can install a single container with a specific service, such as `kea-dhcp4`, or use the `kea-compose` script that makes deployment of a cluster of containers (kea-dhcp4, kea-dhcp6, and a PostgreSQL database) much easier. Running a DHCP server in a Docker container is a bit more complicated than a typical service, as a DHCPv4 server needs to be able to receive traffic from clients that do not yet have an IP address assigned; simple port forwarding is not sufficient. Users should read about ipvlans before deploying Docker containers. Please use caution and share your feedback. For details, see the README file in https://gitlab.isc.org/isc-projects/kea-docker/. The images are available on Cloudsmith (at https://cloudsmith.io/~isc/repos/docker/packages/) and the docker files are on GitLab. 3. **Sources**: The source code is available as a tarball from Cloudsmith, on the ISC downloads site (https://downloads.isc.org/isc/kea/), or directly from the Kea repository on GitLab (https://gitlab.isc.org/isc-projects/kea). ## License This version of Kea is released under the Mozilla Public License, version 2.0. https://www.mozilla.org/en-US/MPL/2.0 Some Kea hook libraries are provided under the MPL 2.0; others are licensed with the [Kea Hooks Basic Commercial End User License](https://www.isc.org/kea-premium-license/). The source for each hook library includes the applicable license. ## Download Pre-built ISC packages for current versions of the most popular Linux operating systems are available at: https://cloudsmith.io/~isc/repos/ Pre-built Docker images as well as Docker files are available. For details, see: https://gitlab.isc.org/isc-projects/kea-docker The Kea source and PGP signature for this release may be downloaded from: https://www.isc.org/download The signature was generated with the ISC code-signing key, which is available at: https://www.isc.org/pgpkey ISC provides detailed documentation, including installation instructions and usage tutorials, in the Kea Administrator Reference Manual. Documentation is included with the installation or at https://kea.readthedocs.io/en/latest/index.html in HTML, PDF, or EPUB formats. ISC maintains a public open source code tree, wiki, issue tracking system, milestone planner, and roadmap at https://gitlab.isc.org/isc-projects/kea. Limitations and known issues with this release can be found at https://gitlab.isc.org/isc-projects/kea/-/wikis/known-issues-list. We ask users of this software to please let us know how it worked for you and what operating system you tested on. Feel free to share your feedback on the Kea Users mailing list (https://lists.isc.org/mailman/listinfo/kea-users). We would also like to hear whether the documentation is adequate and accurate. Please open tickets in the Kea GitLab project for bugs, documentation omissions and errors, and enhancement requests. We want to hear from you even if everything worked. ## Support Professional support for Kea is available from ISC. We encourage all professional users to consider this option; Kea maintenance is funded with support subscriptions. For more information on ISC's Kea software support, see https://www.isc.org/support/. Free best-effort support is provided by our user community via a mailing list. Information on all public email lists is available at https://www.isc.org/community/mailing-list. If you have any comments or questions about working with Kea, please share them to the Kea Users list (https://lists.isc.org/mailman/listinfo/kea-users). Bugs and feature requests may be submitted via GitLab at https://gitlab.isc.org/isc-projects/kea/-/issues. ## Changes The following summarizes changes and important upgrades since the 2.6.0 release. 2252. [bug] tmark, razvan Corrected an issue in MySQL config back end that causes preferred life time values to be overwritten when updating client classes via remote-set-class6. command. (Gitlab #3509, #3469) 2251. [build] razvan The library version numbers have been bumped up for the Kea 2.6.1 stable release. (Gitlab #3507) 2250. [bug] tmark Corrected an issue with overlapping enum values for option definition data type. This was causing option definitions of type "record", created via config backend commands, to not load properly when fetched from the back end. (Gitlab #3484, #3476) 2249. [bug] marcin Corrected a bug in storing and fetching the encapsulated DHCP options from the configuration backend. These options were sometimes not returned when they were specified at the subnet, shared network or client class level. (Gitlab #3485) 2248. [bug] razvan Fixed a file descriptor leak in the High Availability hook library. (Gitlab #3449, #3486) And for Kea premium: 200. [bug] razvan Fixed a file descriptor leak in the hooks libraries. (Gitlab #3449, #3486) Thank you again to everyone who assisted us in making this release possible. We look forward to receiving your feedback.