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-rw-r--r--nixos/doc/manual/release-notes/rl-2009.xml16
1 files changed, 16 insertions, 0 deletions
diff --git a/nixos/doc/manual/release-notes/rl-2009.xml b/nixos/doc/manual/release-notes/rl-2009.xml
index 3bbb7d71d491..3166f98907cd 100644
--- a/nixos/doc/manual/release-notes/rl-2009.xml
+++ b/nixos/doc/manual/release-notes/rl-2009.xml
@@ -415,6 +415,22 @@ systemd.services.nginx.serviceConfig.ReadWritePaths = [ "/var/www" ];
       continue to work through Breezy.
     </para>
    </listitem>
+   <listitem>
+     <para>
+       In addition to the hostname, the fully qualified domain name (FQDN),
+       which consists of <literal>${cfg.hostName}</literal> and
+       <literal>${cfg.domain}</literal> is now added to
+       <literal>/etc/hosts</literal>, to allow local FQDN resolution, as used by the
+       <literal>hostname --fqdn</literal> command and other applications that
+       try to determine the FQDN. These new entries take precedence over entries
+       from the DNS which could cause regressions in some very specific setups.
+       Additionally the hostname is now resolved to <literal>127.0.0.2</literal>
+       instead of <literal>127.0.1.1</literal> to be consistent with what
+       <literal>nss-myhostname</literal> (from systemd) returns.
+       The old behaviour can e.g. be restored by using
+       <literal>networking.hosts = lib.mkForce { "127.0.1.1" = [ config.networking.hostName ]; };</literal>.
+     </para>
+   </listitem>
   </itemizedlist>
  </section>