239 lines
9.4 KiB
XML
239 lines
9.4 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="sec-release-16.09">
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<title>Release 16.09 (“Flounder”, 2016/09/30)</title>
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<para>In addition to numerous new and upgraded packages, this release
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has the following highlights: </para>
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<itemizedlist>
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<listitem>
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<para>Many NixOS configurations and Nix packages now use
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significantly less disk space, thanks to the <link
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xlink:href="https://github.com/NixOS/nixpkgs/issues/7117">extensive
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work on closure size reduction</link>. For example, the closure
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size of a minimal NixOS container went down from ~424 MiB in 16.03
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to ~212 MiB in 16.09, while the closure size of Firefox went from
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~651 MiB to ~259 MiB.</para>
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</listitem>
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<listitem>
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<para>To improve security, packages are now <link
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xlink:href="https://github.com/NixOS/nixpkgs/pull/12895">built
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using various hardening features</link>. See the Nixpkgs manual
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for more information.</para>
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</listitem>
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<listitem>
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<para>Support for PXE netboot. See <xref
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linkend="sec-booting-from-pxe" /> for documentation.</para>
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</listitem>
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<listitem>
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<para>X.org server 1.18. If you use the
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<literal>ati_unfree</literal> driver, 1.17 is still used due to an
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ABI incompatibility.</para>
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</listitem>
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<listitem>
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<para>This release is based on Glibc 2.24, GCC 5.4.0 and systemd
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231. The default Linux kernel remains 4.4.</para>
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</listitem>
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</itemizedlist>
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<para>The following new services were added since the last release:</para>
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<itemizedlist>
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<listitem><para><literal>(this will get automatically generated at release time)</literal></para></listitem>
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</itemizedlist>
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<para>When upgrading from a previous release, please be aware of the
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following incompatible changes:</para>
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<itemizedlist>
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<listitem>
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<para>A large number of packages have been converted to use the multiple outputs feature
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of Nix to greatly reduce the amount of required disk space, as
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mentioned above. This may require changes
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to any custom packages to make them build again; see the relevant chapter in the
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Nixpkgs manual for more information. (Additional caveat to packagers: some packaging conventions
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related to multiple-output packages
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<link xlink:href="https://github.com/NixOS/nixpkgs/pull/14766">were changed</link>
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late (August 2016) in the release cycle and differ from the initial introduction of multiple outputs.)
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</para>
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</listitem>
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<listitem>
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<para>Previous versions of Nixpkgs had support for all versions of the LTS
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Haskell package set. That support has been dropped. The previously provided
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<literal>haskell.packages.lts-x_y</literal> package sets still exist in
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name to aviod breaking user code, but these package sets don't actually
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contain the versions mandated by the corresponding LTS release. Instead,
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our package set it loosely based on the latest available LTS release, i.e.
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LTS 7.x at the time of this writing. New releases of NixOS and Nixpkgs will
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drop those old names entirely. <link
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xlink:href="https://nixos.org/nix-dev/2016-June/020585.html">The
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motivation for this change</link> has been discussed at length on the
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<literal>nix-dev</literal> mailing list and in <link
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xlink:href="https://github.com/NixOS/nixpkgs/issues/14897">Github issue
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#14897</link>. Development strategies for Haskell hackers who want to rely
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on Nix and NixOS have been described in <link
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xlink:href="https://nixos.org/nix-dev/2016-June/020642.html">another
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nix-dev article</link>.</para>
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</listitem>
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<listitem>
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<para>Shell aliases for systemd sub-commands
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<link xlink:href="https://github.com/NixOS/nixpkgs/pull/15598">were dropped</link>:
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<command>start</command>, <command>stop</command>,
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<command>restart</command>, <command>status</command>.</para>
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</listitem>
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<listitem>
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<para>Redis now binds to 127.0.0.1 only instead of listening to all network interfaces. This is the default
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behavior of Redis 3.2</para>
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</listitem>
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<listitem>
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<para>
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<literal>/var/empty</literal> is now immutable. Activation script runs <command>chattr +i</command>
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to forbid any modifications inside the folder. See <link xlink:href="https://github.com/NixOS/nixpkgs/pull/18365">
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the pull request</link> for what bugs this caused.
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</para>
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</listitem>
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<listitem>
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<para>Gitlab's maintainance script
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<command>gitlab-runner</command> was removed and split up into the
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more clearer <command>gitlab-run</command> and
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<command>gitlab-rake</command> scripts, because
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<command>gitlab-runner</command> is a component of Gitlab
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CI.</para>
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</listitem>
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<listitem>
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<para><literal>services.xserver.libinput.accelProfile</literal> default
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changed from <literal>flat</literal> to <literal>adaptive</literal>,
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as per <link xlink:href="https://wayland.freedesktop.org/libinput/doc/latest/group__config.html#gad63796972347f318b180e322e35cee79">
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official documentation</link>.</para>
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</listitem>
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<listitem>
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<para><literal>fonts.fontconfig.ultimate.rendering</literal> was removed
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because our presets were obsolete for some time. New presets are hardcoded
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into FreeType; you can select a preset via <literal>fonts.fontconfig.ultimate.preset</literal>.
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You can customize those presets via ordinary environment variables, using
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<literal>environment.variables</literal>.</para>
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</listitem>
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<listitem>
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<para>The <literal>audit</literal> service is no longer enabled by default.
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Use <literal>security.audit.enable = true</literal> to explicitly enable it.</para>
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</listitem>
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<listitem>
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<para>
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<literal>pkgs.linuxPackages.virtualbox</literal> now contains only the
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kernel modules instead of the VirtualBox user space binaries.
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If you want to reference the user space binaries, you have to use the new
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<literal>pkgs.virtualbox</literal> instead.
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</para>
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</listitem>
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<listitem>
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<para><literal>goPackages</literal> was replaced with separated Go
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applications in appropriate <literal>nixpkgs</literal>
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categories. Each Go package uses its own dependency set. There's
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also a new <literal>go2nix</literal> tool introduced to generate a
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Go package definition from its Go source automatically.</para>
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</listitem>
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<listitem>
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<para><literal>services.mongodb.extraConfig</literal> configuration format
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was changed to YAML.</para>
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</listitem>
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<listitem>
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<para>
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PHP has been upgraded to 7.0
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</para>
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</listitem>
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</itemizedlist>
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<para>Other notable improvements:</para>
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<itemizedlist>
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<listitem><para>Revamped grsecurity/PaX support. There is now only a single
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general-purpose distribution kernel and the configuration interface has been
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streamlined. Desktop users should be able to simply set
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<programlisting>security.grsecurity.enable = true</programlisting> to get
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a reasonably secure system without having to sacrifice too much
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functionality.
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</para></listitem>
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<listitem><para>Special filesystems, like <literal>/proc</literal>,
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<literal>/run</literal> and others, now have the same mount options
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as recommended by systemd and are unified across different places in
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NixOS. Mount options are updated during <command>nixos-rebuild
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switch</command> if possible. One benefit from this is improved
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security — most such filesystems are now mounted with
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<literal>noexec</literal>, <literal>nodev</literal> and/or
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<literal>nosuid</literal> options.</para></listitem>
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<listitem><para>The reverse path filter was interfering with DHCPv4 server
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operation in the past. An exception for DHCPv4 and a new option to log
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packets that were dropped due to the reverse path filter was added
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(<literal>networking.firewall.logReversePathDrops</literal>) for easier
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debugging.</para></listitem>
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<listitem><para>Containers configuration within
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<literal>containers.<name>.config</literal> is <link
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xlink:href="https://github.com/NixOS/nixpkgs/pull/17365">now
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properly typed and checked</link>. In particular, partial
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configurations are merged correctly.</para></listitem>
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<listitem>
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<para>The directory container setuid wrapper programs,
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<filename>/var/setuid-wrappers</filename>, <link
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xlink:href="https://github.com/NixOS/nixpkgs/pull/18124">is now
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updated atomically to prevent failures if the switch to a new
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configuration is interrupted.</link></para>
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</listitem>
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<listitem>
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<para><literal>services.xserver.startGnuPGAgent</literal>
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has been removed due to GnuPG 2.1.x bump. See <link
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xlink:href="https://github.com/NixOS/nixpkgs/commit/5391882ebd781149e213e8817fba6ac3c503740c">
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how to achieve similar behavior</link>. You might need to
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<literal>pkill gpg-agent</literal> after the upgrade
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to prevent a stale agent being in the way.
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</para>
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</listitem>
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<listitem><para>
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<link xlink:href="https://github.com/NixOS/nixpkgs/commit/e561edc322d275c3687fec431935095cfc717147">
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Declarative users could share the uid due to the bug in
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the script handling conflict resolution.
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</link>
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</para></listitem>
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<listitem><para>
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Gummi boot has been replaced using systemd-boot.
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</para></listitem>
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<listitem><para>
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Hydra package and NixOS module were added for convenience.
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</para></listitem>
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</itemizedlist>
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</section>
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