<section xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xml:id="sec-release-21.11">
<title>Release 21.11 (“?”, 2021.11/??)</title>
<para>
In addition to numerous new and upgraded packages, this release has
the following highlights:
</para>
<itemizedlist spacing="compact">
<listitem>
<para>
Support is planned until the end of June 2022, handing over to
22.05.
</para>
</listitem>
</itemizedlist>
<section xml:id="sec-release-21.11-highlights">
<title>Highlights</title>
<itemizedlist>
<listitem>
<para>
PHP now defaults to PHP 8.0, updated from 7.4.
</para>
</listitem>
<listitem>
<para>
kOps now defaults to 1.21.1, which uses containerd as the
default runtime.
</para>
</listitem>
<listitem>
<para>
<literal>python3</literal> now defaults to Python 3.9, updated
from Python 3.8.
</para>
</listitem>
<listitem>
<para>
PostgreSQL now defaults to major version 13.
</para>
</listitem>
<listitem>
<para>
Activation scripts can now opt int to be run when running
<literal>nixos-rebuild dry-activate</literal> and detect the
dry activation by reading <literal>$NIXOS_ACTION</literal>.
This allows activation scripts to output what they would
change if the activation was really run. The users/modules
activation script supports this and outputs some of is
actions.
</para>
</listitem>
</itemizedlist>
</section>
<section xml:id="sec-release-21.11-new-services">
<title>New Services</title>
<itemizedlist>
<listitem>
<para>
<link xlink:href="https://digint.ch/btrbk/index.html">btrbk</link>,
a backup tool for btrfs subvolumes, taking advantage of btrfs
specific capabilities to create atomic snapshots and transfer
them incrementally to your backup locations. Available as
<link xlink:href="options.html#opt-services.brtbk.instances">services.btrbk</link>.
</para>
</listitem>
<listitem>
<para>
<link xlink:href="https://github.com/xrelkd/clipcat/">clipcat</link>,
an X11 clipboard manager written in Rust. Available at
[services.clipcat](options.html#o pt-services.clipcat.enable).
</para>
</listitem>
<listitem>
<para>
<link xlink:href="https://github.com/maxmind/geoipupdate">geoipupdate</link>,
a GeoIP database updater from MaxMind. Available as
<link xlink:href="options.html#opt-services.geoipupdate.enable">services.geoipupdate</link>.
</para>
</listitem>
<listitem>
<para>
<link xlink:href="https://www.isc.org/kea/">Kea</link>, ISCs
2nd generation DHCP and DDNS server suite. Available at
<link xlink:href="options.html#opt-services.kea">services.kea</link>.
</para>
</listitem>