nixpkgs/nixos/doc/manual/release-notes/rl-1809.xml

<section xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         version="5.0"
         xml:id="sec-release-18.09">
 <title>Release 18.09 (“Jellyfish”, 2018/09/??)</title>

 <section xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         version="5.0"
         xml:id="sec-release-18.09-highlights">
  <title>Highlights</title>

  <para>
   In addition to numerous new and upgraded packages, this release has the
   following highlights:
  </para>

  <itemizedlist>
   <listitem>
    <para>
     User channels are now in the default <literal>NIX_PATH</literal>, allowing
     users to use their personal <command>nix-channel</command> defined
     channels in <command>nix-build</command> and <command>nix-shell</command>
     commands, as well as in imports like <code>import
     &lt;mychannel&gt;</code>.
    </para>
    <para>
     For example
    </para>
<programlisting>
$ nix-channel --add https://nixos.org/channels/nixpkgs-unstable nixpkgsunstable
$ nix-channel --update
$ nix-build '&lt;nixpkgsunstable&gt;' -A gitFull
$ nix run -f '&lt;nixpkgsunstable&gt;' gitFull
$ nix-instantiate -E '(import &lt;nixpkgsunstable&gt; {}).gitFull'
</programlisting>
   </listitem>
  </itemizedlist>
 </section>

 <section xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         version="5.0"
         xml:id="sec-release-18.09-new-services">
  <title>New Services</title>

  <para>
   The following new services were added since the last release:
  </para>

  <itemizedlist>
   <listitem>
    <para>
     When enabled the <literal>iproute2</literal> will copy the files expected
     by ip route (e.g., <filename>rt_tables</filename>) in
     <filename>/run/iproute2</filename>. This allows to write aliases for
     routing tables for instance.
    </para>
   </listitem>
  </itemizedlist>
 </section>

 <section xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         version="5.0"
         xml:id="sec-release-18.09-incompatibilities">
  <title>Backward Incompatibilities</title>

  <para>
   When upgrading from a previous release, please be aware of the following
   incompatible changes:
  </para>

  <itemizedlist>
   <listitem>
    <para>
     <literal>lib.strict</literal> is removed. Use
     <literal>builtins.seq</literal> instead.
    </para>
   </listitem>
   <listitem>
    <para>
     The <literal>clementine</literal> package points now to the free
     derivation. <literal>clementineFree</literal> is removed now and
     <literal>clementineUnfree</literal> points to the package which is bundled
     with the unfree <literal>libspotify</literal> package.
    </para>
   </listitem>
   <listitem>
    <para>
     The <literal>netcat</literal> package is now taken directly from OpenBSD's
     <literal>libressl</literal>, instead of relying on Debian's fork. The new
     version should be very close to the old version, but there are some minor
     differences. Importantly, flags like -b, -q, -C, and -Z are no longer
     accepted by the nc command.
    </para>
   </listitem>
   <listitem>
    <para>
     The <varname>services.docker-registry.extraConfig</varname> object doesn't
     contain environment variables anymore. Instead it needs to provide an
     object structure that can be mapped onto the YAML configuration defined in
     <link xlink:href="https://github.com/docker/distribution/blob/v2.6.2/docs/configuration.md">the
     <varname>docker/distribution</varname> docs</link>.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>gnucash</literal> has changed from version 2.4 to 3.x. If you've
     been using <literal>gnucash</literal> (version 2.4) instead of
     <literal>gnucash26</literal> (version 2.6) you must open your Gnucash data
     file(s) with <literal>gnucash26</literal> and then save them to upgrade
     the file format. Then you may use your data file(s) with Gnucash 3.x. See
     the upgrade
     <link xlink:href="https://wiki.gnucash.org/wiki/FAQ#Using_Different_Versions.2C_Up_And_Downgrade">documentation</link>.
     Gnucash 2.4 is still available under the attribute
     <literal>gnucash24</literal>.
    </para>
   </listitem>
   <listitem>
    <para>
     <varname>services.munge</varname> now runs as user (and group) <literal>munge</literal> instead of root.
     Make sure the key file is accessible to the daemon.
    </para>
   </listitem>
   <listitem>
    <para>
      <varname>dockerTools.buildImage</varname> now uses <literal>null</literal> as default value for <varname>tag</varname>,
      which indicates that the nix output hash will be used as tag.
    </para>
   </listitem>
  </itemizedlist>
 </section>

 <section xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         version="5.0"
         xml:id="sec-release-18.09-notable-changes">
  <title>Other Notable Changes</title>

  <itemizedlist>
   <listitem>
    <para>
     <literal>dockerTools.pullImage</literal> relies on image digest instead of
     image tag to download the image. The <literal>sha256</literal> of a pulled
     image has to be updated.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>lib.attrNamesToStr</literal> has been deprecated. Use more
     specific concatenation (<literal>lib.concat(Map)StringsSep</literal>)
     instead.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>lib.addErrorContextToAttrs</literal> has been deprecated. Use
     <literal>builtins.addErrorContext</literal> directly.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>lib.showVal</literal> has been deprecated. Use
     <literal>lib.traceSeqN</literal> instead.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>lib.traceXMLVal</literal> has been deprecated. Use
     <literal>lib.traceValFn builtins.toXml</literal> instead.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>lib.traceXMLValMarked</literal> has been deprecated. Use
     <literal>lib.traceValFn (x: str + builtins.toXML x)</literal> instead.
    </para>
   </listitem>
   <listitem>
    <para>
      The <literal>pkgs</literal> argument to NixOS modules can now be set directly using <literal>nixpkgs.pkgs</literal>. Previously, only the <literal>system</literal>, <literal>config</literal> and <literal>overlays</literal> arguments could be used to influence <literal>pkgs</literal>.
    </para>
   </listitem>
   <listitem>
    <para>
      A NixOS system can now be constructed more easily based on a preexisting invocation of Nixpkgs. For example:
      <programlisting>
inherit (pkgs.nixos {
  boot.loader.grub.enable = false;
  fileSystems."/".device = "/dev/xvda1";
}) toplevel kernel initialRamdisk manual;
      </programlisting>

      This benefits evaluation performance, lets you write Nixpkgs packages that depend on NixOS images and is consistent with a deployment architecture that would be centered around Nixpkgs overlays.
    </para>
   </listitem>
   <listitem>
    <para>
      <literal>lib.traceValIfNot</literal> has been deprecated. Use
      <literal>if/then/else</literal> and <literal>lib.traceValSeq</literal> instead.
    </para>
   </listitem>
   <listitem>
    <para>
     <literal>lib.traceCallXml</literal> has been deprecated. Please complain
     if you use the function regularly.
    </para>
    <para>
     The attribute <literal>lib.nixpkgsVersion</literal> has been deprecated in
     favor of <literal>lib.version</literal>. Please refer to the discussion in
     <link xlink:href="https://github.com/NixOS/nixpkgs/pull/39416#discussion_r183845745">NixOS/nixpkgs#39416</link>
     for further reference.
    </para>
   </listitem>
   <listitem>
    <para>
     The module for <option>security.dhparams</option> has two new options now:
    </para>
    <variablelist>
     <varlistentry>
      <term>
       <option>security.dhparams.stateless</option>
      </term>
      <listitem>
       <para>
        Puts the generated Diffie-Hellman parameters into the Nix store instead
        of managing them in a stateful manner in
        <filename class="directory">/var/lib/dhparams</filename>.
       </para>
      </listitem>
     </varlistentry>
     <varlistentry>
      <term>
       <option>security.dhparams.defaultBitSize</option>
      </term>
      <listitem>
       <para>
        The default bit size to use for the generated Diffie-Hellman
        parameters.
       </para>
      </listitem>
     </varlistentry>
    </variablelist>
    <note>
     <para>
      The path to the actual generated parameter files should now be queried
      using
      <literal>config.security.dhparams.params.<replaceable>name</replaceable>.path</literal>
      because it might be either in the Nix store or in a directory configured
      by <option>security.dhparams.path</option>.
     </para>
    </note>
    <note>
     <title>For developers:</title>
     <para>
      Module implementers should not set a specific bit size in order to let
      users configure it by themselves if they want to have a different bit
      size than the default (2048).
     </para>
     <para>
      An example usage of this would be:
<programlisting>
{ config, ... }:

{
  security.dhparams.params.myservice = {};
  environment.etc."myservice.conf".text = ''
    dhparams = ${config.security.dhparams.params.myservice.path}
  '';
}
</programlisting>
     </para>
    </note>
   </listitem>
   <listitem>
    <para>
     <literal>networking.networkmanager.useDnsmasq</literal> has been
     deprecated. Use <literal>networking.networkmanager.dns</literal> instead.
    </para>
   </listitem>
   <listitem>
    <para>
     The option
     <varname>services.kubernetes.apiserver.admissionControl</varname> was
     renamed to
     <varname>services.kubernetes.apiserver.enableAdmissionPlugins</varname>.
    </para>
   </listitem>
   <listitem>
    <para>
     Recommended way to access the Kubernetes Dashboard is via HTTPS (TLS)
     Therefore; public service port for the dashboard has changed to 443
     (container port 8443) and scheme to https.
    </para>
   </listitem>
   <listitem>
    <para>
     The option <varname>services.kubernetes.apiserver.address</varname>
     was renamed to <varname>services.kubernetes.apiserver.bindAddress</varname>.
     Note that the default value has changed from 127.0.0.1 to 0.0.0.0.
    </para>
   </listitem>
   <listitem>
    <para>
     The option <varname>services.kubernetes.apiserver.publicAddress</varname>
     was not used and thus has been removed.
    </para>
   </listitem>
   <listitem>
    <para>
     The option <varname>services.kubernetes.addons.dashboard.enableRBAC</varname>
     was renamed to <varname>services.kubernetes.addons.dashboard.rbac.enable</varname>.
    </para>
   </listitem>
   <listitem>
    <para>
     The Kubernetes Dashboard now has only minimal RBAC permissions by default.
     If dashboard cluster-admin rights are desired,
     set <varname>services.kubernetes.addons.dashboard.rbac.clusterAdmin</varname> to true.
     On existing clusters, in order for the revocation of privileges to take effect,
     the current ClusterRoleBinding for kubernetes-dashboard must be manually removed:
     <literal>kubectl delete clusterrolebinding kubernetes-dashboard</literal>
    </para>
   </listitem>
   <listitem>
    <para>
     The <varname>programs.screen</varname> module provides allows to configure
     <literal>/etc/screenrc</literal>, however the module behaved fairly counterintuitive as
     the config exists, but the package wasn't available. Since 18.09 <literal>pkgs.screen</literal>
     will be added to <literal>environment.systemPackages</literal>.
    </para>
   </listitem>
   <listitem>
    <para>
      The module <option>services.networking.hostapd</option> now uses WPA2 by default.
    </para>
   </listitem>
  </itemizedlist>
 </section>
</section>