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Configure LDAP on `psi-puppet3`
===============================
References
----------
- https://intranet.psi.ch/AIT/LdapActiveDirectoryIntegrationPSI
- http://linux.web.cern.ch/linux/docs/account-mgmt.shtml
Introduction
------------
This document describes the configuration of LDAP to access user account
information on an SL6 system.
Requirements
------------
RPMS:
- nss-pam-ldapd
Procedure
---------
Configure `/etc/nsswitch.conf`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The `/etc/nsswitch.conf` configuration file describes the order in
which password-file lookups are performed. To make sure that local
accounts take precedence over LDAP accounts, it should have these
entries::
passwd: files ldap
shadow: files
group: files ldap
Configuring `/etc/nslcd.conf`
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The `/etc/nslcd.conf` configuration file is used to set system-wide
defaults to be applied when running ldap clients. This mechanism is
available on SLP6.
This section describes the options that are relevant to configure
account lookups in the d.psi.ch LDAP service. An example configure
file containing the options described below is shown here. Please edit
it to suit your needs - in particular the `filter passwd` entry!::
# the ldaps uri enforces SSL
uri ldaps://d.psi.ch:636
base ou=PSI,dc=d,dc=psi,dc=ch
binddn CN=linux_ldap,OU=Services,OU=IT,DC=d,DC=psi,DC=ch
bindpw *NOT SHOWN*
# ldap base definitions for each nameservice
base passwd ou=Users,ou=PSI,dc=d,dc=psi,dc=ch
base group ou=Groups,ou=PSI,dc=d,dc=psi,dc=ch
filter passwd (&(objectClass=user)(!(objectClass=computer))(msSFU30UidNumber=*)(msSFU30HomeDirectory=*))
map passwd uid cn
map passwd uidNumber msSFU30UidNumber
map passwd gidNumber msSFU30GidNumber
map passwd loginShell msSFU30LoginShell
map passwd gecos displayName
# do not resolve the unneeded userPassword
#map passwd userPassword msSFU30Password
map passwd homeDirectory msSFU30HomeDirectory
# for our clusters' special environments we may want to use an expression
# #map passwd homeDirectory "/home/${sAMAccountName}"
filter group (&(objectClass=Group)(msSFU30Name=*))
map group uniqueMember member
map group gidNumber msSFU30GidNumber
timelimit 30
# we may want to use this to reduce standing connections to the LDAP server
idle_timelimit 300
# require that server's certificate is tested. The standard installed CA bundle includes
# the necessary Root CA cert from QuoVadis
tls_reqcert hard
tls_cacertfile /etc/ssl/certs/ca-bundle.crt
# request paged results from the LDAP server
pagesize 1000
referrals off
Please make sure that the `nss-pam-ldapd` RPM is installed on your
client machine. Run `yum install nss-pam-ldapd` if this RPM is not
installed.
Then, make sure that the `nslcd` runs, and gets started at boot time::
/sbin/service nslcd restart
/sbin/chkconfig --level 345 nslcd on
Note: the `nslcd` service must be restarted after changes to the
`/etc/nslcd.conf` have been made! For more information, run `man
nslcd.conf` and/or `man nslcd`.