Provided by: sssd-common_1.11.8-0ubuntu0.7_amd64 bug


       sssd-sudo - Configuring sudo with the SSSD back end


       This manual page describes how to configure sudo(8) to work with sssd(8) and how SSSD
       caches sudo rules.


       To enable SSSD as a source for sudo rules, add sss to the sudoers entry in

       For example, to configure sudo to first lookup rules in the standard sudoers(5) file
       (which should contain rules that apply to local users) and then in SSSD, the nsswitch.conf
       file should contain the following line:

           sudoers: files sss

       More information about configuring the sudoers search order from the nsswitch.conf file as
       well as information about the LDAP schema that is used to store sudo rules in the
       directory can be found in sudoers.ldap(5).

       Note: in order to use netgroups or IPA hostgroups in sudo rules, you also need to
       correctly set nisdomainname(1) to your NIS domain name (which equals to IPA domain name
       when using hostgroups).


       All configuration that is needed on SSSD side is to extend the list of services with
       "sudo" in [sssd] section of sssd.conf(5). To speed up the LDAP lookups, you can also set
       search base for sudo rules using ldap_sudo_search_base option.

       The following example shows how to configure SSSD to download sudo rules from an LDAP

           config_file_version = 2
           services = nss, pam, sudo
           domains = EXAMPLE

           id_provider = ldap
           sudo_provider = ldap
           ldap_uri = ldap://
           ldap_sudo_search_base = ou=sudoers,dc=example,dc=com

       When the SSSD is configured to use IPA as the ID provider, the sudo provider is
       automatically enabled. The sudo search base is configured to use the compat tree


       The biggest challenge, when developing sudo support in SSSD, was to ensure that running
       sudo with SSSD as the data source provides the same user experience and is as fast as sudo
       but keeps providing the most current set of rules as possible. To satisfy these
       requirements, SSSD uses three kinds of updates. They are referred to as full refresh,
       smart refresh and rules refresh.

       The smart refresh periodically downloads rules that are new or were modified after the
       last update. Its primary goal is to keep the database growing by fetching only small
       increments that do not generate large amounts of network traffic.

       The full refresh simply deletes all sudo rules stored in the cache and replaces them with
       all rules that are stored on the server. This is used to keep the cache consistent by
       removing every rule which was deleted from the server. However, full refresh may produce a
       lot of traffic and thus it should be run only occasionally depending on the size and
       stability of the sudo rules.

       The rules refresh ensures that we do not grant the user more permission than defined. It
       is triggered each time the user runs sudo. Rules refresh will find all rules that apply to
       this user, check their expiration time and redownload them if expired. In the case that
       any of these rules are missing on the server, the SSSD will do an out of band full refresh
       because more rules (that apply to other users) may have been deleted.

       If enabled, SSSD will store only rules that can be applied to this machine. This means
       rules that contain one of the following values in sudoHost attribute:

       •   keyword ALL

       •   wildcard

       •   netgroup (in the form "+netgroup")

       •   hostname or fully qualified domain name of this machine

       •   one of the IP addresses of this machine

       •   one of the IP addresses of the network (in the form "address/mask")

       There are many configuration options that can be used to adjust the behavior. Please refer
       to "ldap_sudo_*" in sssd-ldap(5) and "sudo_*" in sssd.conf(5).


       sssd(8), sssd.conf(5), sssd-ldap(5), sssd-krb5(5), sssd-simple(5), sssd-ipa(5), sssd-
       ad(5), sssd-sudo(5),sss_cache(8), sss_debuglevel(8), sss_groupadd(8), sss_groupdel(8),
       sss_groupshow(8), sss_groupmod(8), sss_useradd(8), sss_userdel(8), sss_usermod(8),
       sss_obfuscate(8), sss_seed(8), sssd_krb5_locator_plugin(8), sss_ssh_authorizedkeys(8),


       The SSSD upstream -