Windows Active Directory Authentication with LDAP and automatic home directory creation

Gabriel A. Devenyi edited this page Jun 27, 2014 · 1 revision

On Frontend

  • Add all OS rolls (needed to satisfy dependencies)
  • Add update roll (just in case)
  • Rebuild rocks distro (this is what creates the local rpm database)
cd /export/rocks/install
rocks create distro
  • yum install sssd (now we can install the login stuff)
  • Use /etc/sssd/sssd.conf file (example below) already prepared (configured to properly talk to AD via LDAP)
    cache_credentials = false

    config_file_version = 2
    reconnection_retries = 3
    sbus_timeout = 30
    services = nss, pam
    domains = mydomain

    reconnection_retries = 3

    reconnection_retries = 3

    # Local LAN AD
    debug_level = 9
    description = AD DC
    enumerate = false
    min_id = 1000
    id_provider = ldap
    auth_provider = krb5
    chpass_provider = krb5

    ldap_uri = ldap://myserver.mydomain.tld

    min_id = 1
    ldap_search_base = dc=mydomain #search base as per your ldap
    ldap_default_bind_dn = ldapuser@mydomain.tld
    ldap_default_authtok_type = password
    ldap_default_authtok = my_ldap_password
    ldap_user_search_base = OU=Users #Where users are located in your LDAP
    ldap_user_object_class = user
    ldap_user_name = sAMAccountName
    ldap_user_uid_number = uidNumber
    ldap_user_gid_number = gidNumber
    ldap_group_object_class = group
    fallback_homedir = /home/%u
    override_shell = /bin/bash

    krb5_server = AD-server.domain.tld
    krb5_realm = mydomain
  • authconfig --enablesssd --enablesssdauth --updateall (turns on sssd authentication)
  • Add to /etc/auto.home * lvsrouter.local:/export/home/& (this short-circuits the rocks sync users which would normally share home directories)
  • Add /etc/sssd/sssd.conf to 411
  • Rebuild 411 with make -C /var/411 force (needed to include auto.home and sssd.conf)
  • Add pam_exec line “session required /etc/security/”


if [ ! $PAM_USER == "root" ]
	if [ ! -d /export/home/$PAM_USER ];
		cp -r /etc/skel /export/home/$PAM_USER
		chown -R $PAM_USER:`id -gn $PAM_USER` /export/home/$PAM_USER
		/etc/init.d/autofs reload
		rocks sync users
		exit 1 #Reject user on first login so that their homedir gets created
exit 0
  • Produce extend-compute.xml using postinstall scripts with:
    • yum install sssd (we do it this way rather than including the rpms because there’s a bunch of dependencies)
    • authconfig --enablesssd --enablesssdauth --updateall (turn on sssd)
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