Ubuntu Manpage: nsscache.conf - NSS local cache synchroniser configuration file

NAME

       nsscache.conf - NSS local cache synchroniser configuration file

SYNOPSIS

       /etc/nsscache.conf

DESCRIPTION

       nsscache  synchronises  a  local  NSS  cache,  and  other databases, against a remote data
       source. This approach allows the administrator to separate the network from the NSS lookup
       codepath, improving speed and reliability of name services.

       The nsscache configuration file comprises of one DEFAULT section, followed by zero or more
       map-specific configuration sections.  The file format is similar to that of ".ini" files.

       The DEFAULT section must provide at least one source keyword, specifying the  data  source
       to  use,  one  cache  keyword, specifying the means in which the cache data will be stored
       locally, and one maps keyword, specifying  which  NSS  maps  should  be  cached,  and  one
       timestamp_dir  keyword,  specifying  the  location  of the timestamps used for incremental
       updates.

       Additional global defaults, such as LDAP search parameters, or the filesystem location  of
       the cache, may also be included in the DEFAULT section.

       Additional sections may be included that allow per-map overrides to configuration options.
       For example, one might specify their global LDAP search base  as  ou=People  but  want  to
       override that for the group mapping as ou=Groups

       Apart  from the source, cache, and maps configuration options, all options are prefixed by
       the name of the module that they configure.

       A complete list of configuration options follows.

DEFAULT-only OPTIONS

       source Specifies the source to use to retrieve NSS data from.

              Valid Options: ldap

       cache  Specifies the cache method to use to store the data, which will be queried  by  the
              NSS itself.

              Valid  options: files Store in a plain text file, similar in format to /etc/passwd.
              If the files-module option files_cache_filename_suffix is also set  to  cache  then
              not  only  will  the  files be created with a .cache suffix, but also an index file
              will  be  written  alongside,  for  use  with  the  nss-cache  NSS  module.    (See
              https://github.com/google/libnss-cache.)

              nssdb Store in a Berkeley DB file, for use with the nss_db NSS module.  Please note
              that this option is deprecated in favour of cache

       maps   Specifies the names of the maps that will be queried and cached by nsscache

              Valid options: passwd group shadow netgroup automount sshkey

       timestamp_dir
              Specifies the directory where update and modify timestamps are stored.

ldap SOURCE OPTIONS

These options configure the behaviour of the ldap source.

ldap_uri
The LDAP URI to connect to.

ldap_base
The base to perform LDAP searches under.

ldap_filter
The search filter to use when querying.

ldap_scope
The search scope to use. Defaults to one

ldap_bind_dn
The bind DN to use when connecting to LDAP. Emtpy string is an anonymous bind.
Defaults to the empty string.

ldap_bind_password
The bind password to use when connecting to LDAP. Empty string is used for
anonymous binds. Defaults to the empty string.

ldap_timelimit
Timelimit in seconds for search results to return. -1 means no limit. Defaults to
-1.

ldap_retry_max
Number of retries on soft failures before giving up. Defaults to 3.

ldap_retry_delay
Delay in seconds between retries. Defaults to 5.

ldap_tls_require_cert
Sets expectations for SSL certificates, using TLS. One of 'never', 'hard',
'demand', 'allow', or 'try'. See ldap.conf(5) for more information.

ldap_tls_cacertdir
Directory for trusted CA certificates. Defaults to /usr/share/ssl

ldap_tls_cacertfile
Filename containing trusted CA certificates. Defaults to /usr/share/ssl/cert.pem

ldap_uidattr
The uid-like attribute in your directory. Defaults to uid.

ldap_uidregex
A Python regex to extract uid components from the uid-like attribute. All matching
groups are concatenated without spaces. For example: '(.*)@example.com' would
return a uid to the left of the @example.com domain. Default is no regex.

ldap_groupregex
A Python regex to extract group member components from the member or memberOf
attributes. All matching groups are concatenated without spaces. For example:
'(.*)@example.com' would return a member without the the @example.com domain.
Default is no regex.

ldap_rfc2307bis
Default uses rfc2307 schema. If rfc2307bis (groups stored as a list of DNs in
'member' attr), set this to 1.

ldap_debug
Sets the debug level for the underlying C library. Defaults to no logging.

nssdb CACHE OPTIONS

       These options configure the behaviour of the nssdb cache.

       nssdb_dir
              Directory to store the Berkeley DB databases.  Defaults to the  current  directory.
              Note that nss_db hardcodes the path to /var/lib/misc on Debian systems, and /var/db
              on Red Hat systems.

       nssdb_makedb
              Path to the makedb(1) command, which is used by the nssdb cache code to ensure that
              the  Berkeley  DB version created by the module matches that expected by the nss_db
              NSS module.

files CACHE OPTIONS

       These optiosn configure the behaviour of the files cache.

       files_dir
              Directory location to store the plain text  files  in.   Defaults  to  the  current
              directory.

       files_cache_filename_suffix
              A  suffix  appended to the cache filename to differentiate it from, say, system NSS
              databases.  Defaults to '.cache'.

       files_local_automount_master
              A yes/no field only used for automount maps.  A 'yes' value will cause nsscache  to
              update the auto.master file with the master map from the source.  A 'no' value will
              cause nsscache to leave auto.master alone, allowing the system to manage this  file
              in  other  ways.   When set to 'no', nsscache will only update other automount maps
              defined both locally and in the source.  Defaults to 'yes'.

EXAMPLE

       A typical example might look like this:

         [DEFAULT]
         source = ldap
         cache = nssdb
         maps = passwd, group, shadow
         ldap_uri = ldap://ldap.example.com
         ldap_base = ou=People,dc=example,dc=com
         ldap_filter = (objectclass=posixAccount)
         nssdb_dir = /var/lib/misc

         [group]
         ldap_base = ou=Group,dc=example,dc=com
         ldap_filter = (objectclass=posixGroup)

         [shadow]
         ldap_filter = (objectclass=posixAccount)

       And a complementary /etc/nsswitch.conf might look like this:

         passwd: files db
         group: files db
         shadow: files db

FILES

       /etc/nsscache.conf
              The system-wide nsscache configuration file

AUTHOR

       Written by Jamie Wilkinson (jaq@google.com) and Vasilios Hoffman (vasilios@google.com).

       The source code lives at https://github.com/google/nsscache

COPYRIGHT

       Copyright © 2007 Google, Inc.
       This is free software; see the source for copying conditions.  There is NO  warranty;  not
       even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.