NAME

       realmd.conf - Tweak behavior of realmd

CONFIGURATION FILE

       realmd can be tweaked by network administrators to act in specific ways. This is done by
       placing settings in a /etc/realmd.conf. This file does not exist by default. The syntax of
       this file is the same as an INI file or Desktop Entry file.

       In general, settings in this file only apply at the point of joining a domain or realm.
       Once the realm has been setup the settings have no effect. You may choose to configure
       SSSD[1] or Winbind[2] directly.

       Only specify the settings you wish to override in the /etc/realmd.conf file. Settings not
       specified will be loaded from their packaged defaults. Only override the settings below.
       You may find other settings if you look through the realmd source code. However these are
       not guaranteed to remain stable.

       There are various sections in the config file. Some sections are global topic sections,
       and are listed below. Other sections are specific to a given realm. These realm specific
       sections should always contain the domain name in lower case as their section header.

       Examples of each setting is found below, including the header of the section it should be
       placed in. However in the resulting file only include each section once, and combine the
       various section setting together as lines underneath the section. For example

           [users]
           default-home = /home/%U
           default-shell = /bin/bash

ACTIVE-DIRECTORY

       These options should go in an [active-directory] section of the /etc/realmd.conf file.
       Only specify the settings you wish to override.

       default-client
           Specify the default-client setting in order to control which client software is the
           preferred default for use with Active Directory.

               [active-directory]
               default-client = sssd
               # default-client = winbind

           The default setting for this is sssd which uses SSSD[1] as the Active Directory
           client. You can also specify winbind to use Samba Winbind[2].

           Some callers of realmd such as the realm command line tool allow specifying which
           client software should be used. Others, such as GNOME Control Center, simplify choose
           the default.

           You can verify the preferred default client softawre by running the following command.
           The realm with the preferred client software will be listed first.

               $ realm discover domain.example.com
               domain.example.com
                 configured: no
                 server-software: active-directory
                 client-software: sssd
                 type: kerberos
                 realm-name: AD.THEWALTER.LAN
                 domain-name: ad.thewalter.lan
               domain.example.com
                 configured: no
                 server-software: active-directory
                 client-software: winbind
                 type: kerberos
                 realm-name: AD.THEWALTER.LAN
                 domain-name: ad.thewalter.lan

       os-name
           (see below)

       os-version
           Specify the os-name and/or os-version settings to control the values that are placed
           in the computer account operatingSystem and operatingSystemVersion attributes.

           This is an Active Directory specific option.

           It is also possible to use the --os-name or --os-version argument of the realm command
           to override the default values.

               [active-directory]
               os-name = Gentoo Linux
               os-version = 9.9.9.9.9

SERVICE

       These options should go in an [service] section of the /etc/realmd.conf file. Only specify
       the settings you wish to override.

       automatic-install
           Set this to no to disable automatic installation of packages via package-kit.

               [service]
               automatic-install = no
               # automatic-install = yes

USERS

       These options should go in an [users] section of the /etc/realmd.conf file. Only specify
       the settings you wish to override.

       default-home
           Specify the default-home setting in order to control how to set the home directory for
           accounts that have no home directory explicitly set.

               [users]
               default-home = /home/%U@%D
               # default-home = /nfs/home/%D-%U
               # default-home = /home/%D/%U

           The default setting for this is /home/%U@%D. The %D format is replaced by the domain
           name. The %U format is replaced by the user name.

           You can verify the home directory for a user by running the following command.

               $ getent passwd 'DOMAIN/User'
               DOMAIN\user:*:13445:13446:Name:/home/DOMAIN/user:/bin/bash
           Note that in the case of IPA domains, most users already have a home directory
           configured in the domain. Therefore this configuration setting may rarely show
           through.

       default-shell
           Specify the default-shell setting in order to control how to set the Unix shell for
           accounts that have no shell explicitly set.

               [users]
               default-shell = /bin/bash
               # default-shell = /bin/sh

           The default setting for this is /bin/bash shell. The shell should be a valid shell if
           you expect the domain users be able to log in. For example it should exist in the
           /etc/shells file.

           You can verify the shell for a user by running the following command.

               $ getent passwd 'DOMAIN/User'
               DOMAIN\user:*:13445:13446:Name:/home/DOMAIN/user:/bin/bash
           Note that in the case of IPA domains, most users already have a shell configured in
           the domain. Therefore this configuration setting may rarely show through.

REALM SPECIFIC SETTINGS

       These options should go in an section with the same name as the realm in the
       /etc/realmd.conf file. For example for the domain.example.com domain the section would be
       called [domain.example.com]. To figure out the canonical name for a realm use the realm
       command:

           $ realm discover --name DOMAIN.example.com
           domain.example.com
           ...

       Only specify the settings you wish to override.

       computer-ou
           Specify this option to create directory computer accounts in a location other than the
           default. This currently only works with Active Directory domains.

               [domain.example.com]
               computer-ou = OU=Linux Computers,DC=domain,DC=example,DC=com
               # computer-ou = OU=Linux Computers,

           Specify the OU as an LDAP DN. It can be relative to the Root DSE, or a complete LDAP
           DN. Obviously the OU must exist in the directory.

           It is also possible to use the --computer-ou argument of the realm command to create a
           computer account at a specific OU.

       computer-name
           This option only applied to Active Directory realms. Specify this option to override
           the default name used when creating the computer account. The system's FQDN will still
           be saved in the dNSHostName attribute.

               [domain.example.com]
               computer-name = SERVER01
           Specify the name as a string of 15 or fewer characters that is a valid NetBIOS
           computer name.

           It is also possible to use the --computer-name argument of the realm command to
           override the default computer account name.

       user-prinicpal
           Set the user-prinicpal to yes to create userPrincipalName attributes for the computer
           account in the realm, in the form host/computer@REALM

               [domain.example.com]
               user-principal = yes

       automatic-join
           This option only applies to Active Directory realms. This option is off by default. In
           Active Directory domains, a computer account can be preset with a known computer
           account password. This can be used for automatic joins without authentication.

           When automatic joins are used there is no mutual authentication between the machine
           and the domain during the join process.

               [domain.example.com]
               automatic-join = yes

       automatic-id-mapping
           This option is on by default for Active Directory realms. Turn it off to use UID and
           GID information stored in the directory (as-per RFC2307) rather than automatically
           generating UID and GID numbers.

           This option only makes sense for Active Directory realms.

               [domain.example.com]
               automatic-id-mapping = no
               # automatic-id-mapping = yes

       manage-system
           This option is on by default. Normally joining a realm affects many aspects of the
           configuration and management of the system. Turning this off limits the interaction
           with the realm or domain to authentication and identity.

               [domain.example.com]
               manage-system = no
               # manage-system = yes

           When this option is turned on realmd defaults to using domain policy to control who
           can log into this machine. Further adjustments to login policy can be made with the
           realm permit command.

       fully-qualified-names
           This option is on by default. If turned off then realm user and group names are not
           qualified their name. This may cause them to conflict with local user and group names.

               [domain.example.com]
               fully-qualified-names = no
               # fully-qualified-names = yes

AUTHOR

       Stef Walter <stef@thewalter.net>
           Maintainer

NOTES

        1. SSSD
           https://fedorahosted.org/sssd/

        2. Winbind
           http://www.samba.org/samba/docs/man/Samba-HOWTO-Collection/winbind.html