<chapter 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="module-services-nextcloud">
 <title>Nextcloud</title>
 <para>
  <link xlink:href="https://nextcloud.com/">Nextcloud</link> is an open-source,
  self-hostable cloud platform. The server setup can be automated using
  <link linkend="opt-services.nextcloud.enable">services.nextcloud</link>. A
  desktop client is packaged at <literal>pkgs.nextcloud-client</literal>.
 </para>
 <section xml:id="module-services-nextcloud-basic-usage">
  <title>Basic usage</title>

  <para>
   Nextcloud is a PHP-based application which requires an HTTP server
   (<literal><link linkend="opt-services.nextcloud.enable">services.nextcloud</link></literal>
   optionally supports
   <literal><link linkend="opt-services.nginx.enable">services.nginx</link></literal>)
   and a database (it's recommended to use
   <literal><link linkend="opt-services.postgresql.enable">services.postgresql</link></literal>).
  </para>

  <para>
   A very basic configuration may look like this:
<programlisting>{ pkgs, ... }:
{
  services.nextcloud = {
    <link linkend="opt-services.nextcloud.enable">enable</link> = true;
    <link linkend="opt-services.nextcloud.hostName">hostName</link> = "nextcloud.tld";
    <link linkend="opt-services.nextcloud.nginx.enable">nginx.enable</link> = true;
    config = {
      <link linkend="opt-services.nextcloud.config.dbtype">dbtype</link> = "pgsql";
      <link linkend="opt-services.nextcloud.config.dbuser">dbuser</link> = "nextcloud";
      <link linkend="opt-services.nextcloud.config.dbhost">dbhost</link> = "/run/postgresql"; # nextcloud will add /.s.PGSQL.5432 by itself
      <link linkend="opt-services.nextcloud.config.dbname">dbname</link> = "nextcloud";
      <link linkend="opt-services.nextcloud.config.adminpassFile">adminpassFile</link> = "/path/to/admin-pass-file";
      <link linkend="opt-services.nextcloud.config.adminuser">adminuser</link> = "root";
    };
  };

  services.postgresql = {
    <link linkend="opt-services.postgresql.enable">enable</link> = true;
    <link linkend="opt-services.postgresql.ensureDatabases">ensureDatabases</link> = [ "nextcloud" ];
    <link linkend="opt-services.postgresql.ensureUsers">ensureUsers</link> = [
     { name = "nextcloud";
       ensurePermissions."DATABASE nextcloud" = "ALL PRIVILEGES";
     }
    ];
  };

  # ensure that postgres is running *before* running the setup
  systemd.services."nextcloud-setup" = {
    requires = ["postgresql.service"];
    after = ["postgresql.service"];
  };

  <link linkend="opt-networking.firewall.allowedTCPPorts">networking.firewall.allowedTCPPorts</link> = [ 80 443 ];
}</programlisting>
  </para>

  <para>
   The options <literal>hostName</literal> and <literal>nginx.enable</literal>
   are used internally to configure an HTTP server using
   <literal><link xlink:href="https://php-fpm.org/">PHP-FPM</link></literal>
   and <literal>nginx</literal>. The <literal>config</literal> attribute set is
   used by the imperative installer and all values are written to an additional file
   to ensure that changes can be applied by changing the module's options.
  </para>

  <para>
   In case the application serves multiple domains (those are checked with
   <literal><link xlink:href="http://php.net/manual/en/reserved.variables.server.php">$_SERVER['HTTP_HOST']</link></literal>)
   it's needed to add them to
   <literal><link linkend="opt-services.nextcloud.config.extraTrustedDomains">services.nextcloud.config.extraTrustedDomains</link></literal>.
  </para>

  <para>
   Auto updates for Nextcloud apps can be enabled using
   <literal><link linkend="opt-services.nextcloud.autoUpdateApps.enable">services.nextcloud.autoUpdateApps</link></literal>.
</para>

 </section>
 <section xml:id="module-services-nextcloud-pitfalls-during-upgrade">
  <title>Pitfalls</title>

  <para>
   Unfortunately Nextcloud appears to be very stateful when it comes to
   managing its own configuration. The config file lives in the home directory
   of the <literal>nextcloud</literal> user (by default
   <literal>/var/lib/nextcloud/config/config.php</literal>) and is also used to
   track several states of the application (e.g. whether installed or not).
  </para>

  <para>
   All configuration parameters are also stored in
   <literal>/var/lib/nextcloud/config/override.config.php</literal> which is generated by
   the module and linked from the store to ensure that all values from <literal>config.php</literal>
   can be modified by the module.
   However <literal>config.php</literal> manages the application's state and shouldn't be touched
   manually because of that.
  </para>

  <warning>
   <para>Don't delete <literal>config.php</literal>! This file
   tracks the application's state and a deletion can cause unwanted
   side-effects!</para>
  </warning>

  <warning>
   <para>Don't rerun <literal>nextcloud-occ
   maintenance:install</literal>! This command tries to install the application
   and can cause unwanted side-effects!</para>
  </warning>
 </section>
</chapter>
