8.3. Granting sudo access to an AD user on an IdM client using the CLI

1. Add the AD users or groups to a non-POSIX external IdM group.
2. Add the non-POSIX external IdM group to an IdM POSIX group.

Procedure

1. Create the ad_users group that contains the ad_users_external group with the administrator@ad-domain member:

   1. Optional: Create or select a corresponding group in the AD domain to use to manage AD users in the IdM realm. You can use multiple AD groups and add them to different groups on the IdM side.

   2. Create the ad_users_external group and indicate that it contains members from outside the IdM domain by adding the --external option:

      [root@ipaserver ~]# ipa group-add --desc='AD users external map' ad_users_external --external
      -------------------------------
      Added group "ad_users_external"
      -------------------------------
        Group name: ad_users_external
        Description: AD users external map

      참고

      Ensure that the external group that you specify here is an AD security group with a global or universal group scope as defined in the Active Directory security groups document. For example, the Domain users or Domain admins AD security groups cannot be used because their group scope is domain local.

   3. Create the ad_users group:

      [root@ipaserver ~]# ipa group-add --desc='AD users' ad_users
      ----------------------
      Added group "ad_users"
      ----------------------
        Group name: ad_users
        Description: AD users
        GID: 129600004

   4. Add the administrator@ad-domain.com AD user to ad_users_external as an external member:

      [root@ipaserver ~]# ipa group-add-member ad_users_external --external "administrator@ad-domain.com"
       [member user]:
       [member group]:
        Group name: ad_users_external
        Description: AD users external map
        External member: S-1-5-21-3655990580-1375374850-1633065477-513
      -------------------------
      Number of members added 1
      -------------------------

      The AD user must be identified by a fully-qualified name, such as DOMAIN\user_name or user_name@DOMAIN. The AD identity is then mapped to the AD SID for the user. The same applies to adding AD groups.

   5. Add ad_users_external to ad_users as a member:

   [root@ipaserver ~]# ipa group-add-member ad_users --groups ad_users_external
     Group name: ad_users
     Description: AD users
     GID: 129600004
     Member groups: ad_users_external
   -------------------------
   Number of members added 1
   -------------------------

2. Grant the members of ad_users the permission to run /usr/sbin/reboot on the idmclient host:

   1. Add the /usr/sbin/reboot command to the IdM database of sudo commands:

      [root@idmclient ~]# ipa sudocmd-add /usr/sbin/reboot
      -------------------------------------
      Added Sudo Command "/usr/sbin/reboot"
      -------------------------------------
        Sudo Command: /usr/sbin/reboot

   2. Create a sudo rule named ad_users_reboot:

      [root@idmclient ~]# ipa sudorule-add ad_users_reboot
      ---------------------------------
      Added Sudo Rule "ad_users_reboot"
      ---------------------------------
        Rule name: ad_users_reboot
        Enabled: True

   3. Add the /usr/sbin/reboot command to the ad_users_reboot rule:

      [root@idmclient ~]# ipa sudorule-add-allow-command ad_users_reboot --sudocmds '/usr/sbin/reboot'
        Rule name: ad_users_reboot
        Enabled: True
        Sudo Allow Commands: /usr/sbin/reboot
      -------------------------
      Number of members added 1
      -------------------------

   4. Apply the ad_users_reboot rule to the IdM idmclient host:

      [root@idmclient ~]# ipa sudorule-add-host ad_users_reboot --hosts idmclient.idm.example.com
      Rule name: ad_users_reboot
      Enabled: True
      Hosts: idmclient.idm.example.com
      Sudo Allow Commands: /usr/sbin/reboot
      -------------------------
      Number of members added 1
      -------------------------

   5. Add the ad_users group to the ad_users_reboot rule:

      [root@idmclient ~]# ipa sudorule-add-user ad_users_reboot --groups ad_users
      Rule name: ad_users_reboot
      Enabled: TRUE
      User Groups: ad_users
      Hosts: idmclient.idm.example.com
      Sudo Allow Commands: /usr/sbin/reboot
      -------------------------
      Number of members added 1
      -------------------------

   참고

   Propagating the changes from the server to the client can take a few minutes.

Verification

1. Log in to the idmclient host as administrator@ad-domain.com, an indirect member of the ad_users group:

   $ ssh administrator@ad-domain.com@ipaclient
   Password:

2. Optional: Display the sudo commands that administrator@ad-domain.com is allowed to execute:

   [administrator@ad-domain.com@idmclient ~]$ sudo -l
   Matching Defaults entries for administrator@ad-domain.com on idmclient:
       !visiblepw, always_set_home, match_group_by_gid, always_query_group_plugin,
       env_reset, env_keep="COLORS DISPLAY HOSTNAME HISTSIZE KDEDIR LS_COLORS",
       env_keep+="MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE",
       env_keep+="LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES",
       env_keep+="LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE",
       env_keep+="LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY KRB5CCNAME",
       secure_path=/sbin\:/bin\:/usr/sbin\:/usr/bin
   
   User administrator@ad-domain.com may run the following commands on idmclient:
       (root) /usr/sbin/reboot

3. Reboot the machine using sudo. Enter the password for administrator@ad-domain.com when prompted:

   [administrator@ad-domain.com@idmclient ~]$ sudo /usr/sbin/reboot
   [sudo] password for administrator@ad-domain.com: