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>
       Support for wrapping binaries using <literal>firejail</literal> has been
       added through <varname>programs.firejail.wrappedBinaries</varname>.
     </para>
     <para>
       For example
     </para>
<programlisting>
programs.firejail = {
  enable = true;
  wrappedBinaries = {
    firefox = "${lib.getBin pkgs.firefox}/bin/firefox";
    mpv = "${lib.getBin pkgs.mpv}/bin/mpv";
  };
};
</programlisting>
      <para>
        This will place <literal>firefox</literal> and <literal>mpv</literal> binaries in the global path wrapped by firejail.
      </para>
   </listitem>
   <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>
     The <varname>services.cassandra</varname> module has been reworked and
     was rewritten from scratch. The service has succeeding tests for
     the versions 2.1, 2.2, 3.0 and 3.11 of <link
     xlink:href="https://cassandra.apache.org/">Apache Cassandra</link>.
    </para>
   </listitem>
   <listitem>
    <para>
     There is a new <varname>services.foundationdb</varname> module for deploying
     <link xlink:href="https://www.foundationdb.org">FoundationDB</link> clusters.
    </para>
   </listitem>
   <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>
   <listitem>
    <para>
      <varname>services.strongswan-swanctl</varname>
      is a modern replacement for <varname>services.strongswan</varname>.
      You can use either one of them to setup IPsec VPNs but not both at the same time.
    </para>
    <para>
      <varname>services.strongswan-swanctl</varname> uses the
      <link xlink:href="https://wiki.strongswan.org/projects/strongswan/wiki/swanctl">swanctl</link>
      command which uses the modern
      <link xlink:href="https://github.com/strongswan/strongswan/blob/master/src/libcharon/plugins/vici/README.md">vici</link>
      <emphasis>Versatile IKE Configuration Interface</emphasis>.
      The deprecated <literal>ipsec</literal> command used in <varname>services.strongswan</varname> is using the legacy
      <link xlink:href="https://github.com/strongswan/strongswan/blob/master/README_LEGACY.md">stroke configuration interface</link>.
    </para>
   </listitem>
   <listitem>
    <para>
      The new <varname>services.elasticsearch-curator</varname> service
      periodically curates or manages, your Elasticsearch indices and snapshots.
    </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>
     The deprecated <varname>services.cassandra</varname> module has
     seen a complete rewrite. (See above.)
    </para>
   </listitem>
   <listitem>
    <para>
     The minimum version of Nix required to evaluate Nixpkgs is now 2.0.
    </para>
    <itemizedlist>
     <listitem>
      <para>
       For users of NixOS 18.03, NixOS 18.03 defaulted to Nix 2.0, but
       supported using Nix 1.11 by setting <literal>nix.package =
       pkgs.nix1;</literal>. If this option is set to a Nix 1.11 package, you
       will need to either unset the option or upgrade it to Nix 2.0.
      </para>
     </listitem>
     <listitem>
      <para>
       For users of NixOS 17.09, you will first need to upgrade Nix by setting
       <literal>nix.package = pkgs.nixStable2;</literal> and run
       <command>nixos-rebuild switch</command> as the <literal>root</literal>
       user.
      </para>
     </listitem>
     <listitem>
      <para>
       For users of a daemon-less Nix installation on Linux or macOS, you can
       upgrade Nix by running <command>curl https://nixos.org/nix/install |
       sh</command>, or prior to doing a channel update, running
       <command>nix-env -iA nix</command>.
      </para>
      <para>
       If you have already run a channel update and Nix is no longer able to
       evaluate Nixpkgs, the error message printed should provide adequate
       directions for upgrading Nix.
      </para>
     </listitem>
     <listitem>
      <para>
       For users of the Nix daemon on macOS, you can upgrade Nix by running
       <command>sudo -i sh -c 'nix-channel --update &amp;&amp; nix-env -iA
       nixpkgs.nix'; sudo launchctl stop org.nixos.nix-daemon; sudo launchctl
       start org.nixos.nix-daemon</command>.
      </para>
     </listitem>
    </itemizedlist>
   </listitem>
   <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>
   <listitem>
    <para>
     The ELK stack: <varname>elasticsearch</varname>, <varname>logstash</varname> and <varname>kibana</varname>
     has been upgraded from 2.* to 6.3.*.
     The 2.* versions have been <link xlink:href="https://www.elastic.co/support/eol">unsupported since last year</link>
     so they have been removed. You can still use the 5.* versions under the names
     <varname>elasticsearch5</varname>, <varname>logstash5</varname> and
     <varname>kibana5</varname>.
    </para>
    <para>
     The elastic beats:
     <varname>filebeat</varname>, <varname>heartbeat</varname>,
     <varname>metricbeat</varname> and <varname>packetbeat</varname>
     have had the same treatment: they now target 6.3.* as well.
     The 5.* versions are available under the names:
     <varname>filebeat5</varname>, <varname>heartbeat5</varname>,
     <varname>metricbeat5</varname> and <varname>packetbeat5</varname>
    </para>
    <para>
     The ELK-6.3 stack now comes with
     <link xlink:href="https://www.elastic.co/products/x-pack/open">X-Pack by default</link>.
     Since X-Pack is licensed under the
     <link xlink:href="https://github.com/elastic/elasticsearch/blob/master/licenses/ELASTIC-LICENSE.txt">Elastic License</link>
     the ELK packages now have an unfree license. To use them you need to specify
     <literal>allowUnfree = true;</literal> in your nixpkgs configuration.
    </para>
    <para>
     Fortunately there is also a free variant of the ELK stack without X-Pack.
     The packages are available under the names:
     <varname>elasticsearch-oss</varname>, <varname>logstash-oss</varname> and
     <varname>kibana-oss</varname>.
    </para>
   </listitem>
   <listitem>
    <para>
      Options
      <literal>boot.initrd.luks.devices.<replaceable>name</replaceable>.yubikey.ramfsMountPoint</literal>
      <literal>boot.initrd.luks.devices.<replaceable>name</replaceable>.yubikey.storage.mountPoint</literal>
      were removed. <literal>luksroot.nix</literal> module never supported more than one YubiKey at
      a time anyway, hence those options never had any effect. You should be able to remove them
      from your config without any issues.
    </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>
   </listitem>
   <listitem>
    <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>
     <literal>lib.recursiveUpdateUntil</literal> was not acting according to its
     specification. It has been fixed to act according to the docstring, and a
     test has been added.
    </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>
   <listitem>
    <para>
      <varname>s6Dns</varname>, <varname>s6Networking</varname>,
      <varname>s6LinuxUtils</varname> and <varname>s6PortableUtils</varname>
      renamed to
      <varname>s6-dns</varname>, <varname>s6-networking</varname>,
      <varname>s6-linux-utils</varname> and <varname>s6-portable-utils</varname> respectively.
    </para>
  </listitem>
  <listitem>
    <para>
      The module option <option>nix.useSandbox</option> is now defaulted to <literal>true</literal>.
    </para>
  </listitem>
  <listitem>
    <para>
      The config activation script of <literal>nixos-rebuild</literal> now
      <link xlink:href="https://www.freedesktop.org/software/systemd/man/systemctl.html#Manager%20Lifecycle%20Commands">reloads</link>
      all user units for each authenticated user.
    </para>
  </listitem>
  <listitem>
    <para>
      The default display manager is now LightDM.
      To use SLiM set <literal>services.xserver.displayManager.slim.enable</literal>
      to <literal>true</literal>.
    </para>
  </listitem>
  </itemizedlist>
 </section>
</section>