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LDAP System Administration [Electronic resources] - نسخه متنی

Gerald Carter

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• Table of Contents

• Index

• Reviews

• Reader Reviews

• Errata

LDAP System Administration

By Gerald Carter

Publisher : O''''Reilly

Pub Date : March 2003

ISBN : 1-56592-491-6

Pages : 308

If you want to be a master of your domain, LDAP System Administration will help you get up and running quickly regardless of which LDAP version you use. After reading this book, even with no previous LDAP experience, you''''ll be able to integrate a directory server into essential network services such as mail, DNS, HTTP, and SMB/CIFS.
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6.10 Automount Maps



In order to use the automount
information stored in your directory, you must shift your focus to
the automount daemon itself, specifically Linux's
kernel-based autofs. As it currently stands, autofs
(v3.1.7 and the 4.0 preview releases) supports the undocumented
automount and
automountMap object classes. However, Red Hat
has updated the package in its distribution (autofs-3.1.7-28) to look
up mount points based on the
nisObject and nisMap classes
described in RFC 2307 (and included in
nis.schema). The LDAPbis
workgroup's revisions to RFC 2307 will include new
schema items for storing automount information, but for the moment,
nisObject and nisMap have the
largest support base from Red Hat, Sun, and PADL. Figure 6-8 shows the required and optional attributes for
these two new object classes.



Figure 6-8. nisObject and nisMap object classes








Red Hat's automount
patches can be obtained from either http://people.redhat.com/nalin/autofs/ or in
the latest autofs SRPM at ) for converting an
automount map to LDIF. Here, you
will convert a single automount point in /opt to
a directory entry. You can see from the
/etc/auto.opt excerpt that the LDIF entry contains all of
the information needed for mounting /opt/src.
This time, PADL's script does create the top-level
container (nisMapName=auto.opt) for you:


$ grep src /etc/auto.opt
src    -rw,hard,intr    queso.plainjoe.org:/export/u1/src
$ ./migrate_automount.pl /etc/auto.opt /tmp/auto.opt.ldif
$ cat /tmp/auto.opt.ldif
dn: nisMapName=auto.opt,dc=plainjoe,dc=org
objectClass: top
objectClass: nisMap
nisMapName: auto.opt
dn: cn=src,nisMapName=auto.opt,dc=plainjoe,dc=org
objectClass: nisObject
cn: src
nisMapEntry: -rw,hard,intr queso.plainjoe.org:/export/u1/src
nisMapName: auto.opt


After adding the new automount entries to the directory using
ldapadd, the autofs server must be informed of
auto.opt's map location, the
LDAP server's hostname, and the search base. The
following line in /etc/auto.master instructs the
autofs package to look up mounts for /opt on the
host ldap1 beneath
ou=auto.opt,dc=plainjoe,dc=org:


## Look up mounts for /opt in the LDAP directory.
/opt  ldap:ldap1:nisMapName=auto.opt,dc=plainjoe,dc=org  --timeout 300


Now you can launch the automount daemon; it will
obtain all information for mount points in /opt
from the directory server. If you're curious about
what's going on, I recommend viewing the
slapd log file on your server for more
information on the autofs LDAP queries.



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