Provided by: lcmaps-plugins-basic-poolaccount_1.7.1-1ubuntu2_amd64 
NAME
lcmaps_poolaccount.mod - LCMAPS plugin to switch user identity by pool accounts
SYNOPSIS
lcmaps_poolaccount.mod [-gridmapfile grid-mapfile] [-gridmapdir gridmapdir]
[-no_wildcard|-disablewildcard] [-override_inconsistency] [-max_mappings_per_credential
maxnrofmappings] [-strict_poolprefix_match {yes|no}]
DESCRIPTION
This plugin is an acquisition plugin and will provide the LCMAPS system with Pool Account
credential information. The plugin tries to find a pool account (more specifically a
UserID) based on the Distinguished Name (DN) of the user's end-entity certificate. The
account is acquired from an account pool. The accounts in the account pool must exist on
the system, either locally or through a centralised account database, e.g. LDAP.
It will first try to find a DN to pool name (starting with a dot '.' instead of an
alphanumeric character) mapping in the grid-mapfile which will provide it with a list of
local accounts.
The gridmapdir directory is going to be used as a persistent and open mapping database. A
pool is defined as being a set of accounts following a particular pattern in their naming,
e.g. test001. In the directory the plug-in will make a new filename consisting of the
lowercase URL-encoded Subject-DN of the user.
For example, if the DN is mapped to .test in the grid-mapfile, it will be mapped to the
pool accounts test001, test002, etc., the names of which can be found in the gridmapdir.
If there is no pool account assigned to the user yet, the plugin will try to find a free
pool account (i.e. one for which the link count is 1) and make a new hardlink to it with
the URL-encoded subject DN as name.
When a user returns to this site the plugin will look for the DN of the user (URL encoded)
in this directory. If found, the corresponding pool account will be assigned to the user.
Example showing the output of ls -li:
1836080 -rw-r--r-- 2 root root %2fdc%3dorg%2fdc%3dterena%2fdc%3dtcs%2fc%3dnl%2fo%3dnikhef%2fcn%3doscar%20koeroo%20okoeroo%40nikhef%2enl
1836080 -rw-r--r-- 2 root root test003
The filename is hardlinked to the mapped account-name. Creating this hardlink is designed
to be an atomic operation and verified to work on large installations serving multiple
services from one NFS-share.
The plugin will resolve the UID, GID and all the secondary GIDs of the mapped local
(system) account username.
OPTIONS
-gridmapfile grid-mapfile
This file must contain DN to pool name mappings. It is strongly advised to set
this option and to set it to an absolute path to avoid usage of the wrong
file(path). When unset, the plugin will try to obtain the value from one of the
environment variables (see ENVIRONMENT). When those are also unset, the default
depends on whether the plugin runs inside a (setuid-)root application. In the
(setuid-)root case, the default is /etc/grid-security/grid-mapfile. In the
non-(setuid-)root case, the default is <homedir>/.gridmap. In a (setuid-)root
application, relative paths are taken with respect to /etc/grid-security/.
-gridmapdir gridmapdir
A directory used for the mapping database. If this option is unset, the plugin
will try to obtain the value from the environment variable GRIDMAPDIR (see
ENVIRONMENT). In a (setuid-)root application, relative paths are taken with
respect to /etc/grid-security/.
-override_inconsistency
Moving a user from one pool to another should normally only be done by changing the
grid-mapfile indicating the new pool for this user. If the resulting URL-encoded
lease (hardlink) already exists but points to a different pool account then would
result from the running of this plugin, the plugin would normally fail. This option
instructs the plugin to remap to the new pool account.
-max_mappings_per_credential maximum number of mappings
This feature is deprecated. It was intended to work together with the Globus
Dynamic Account Service/Workspace Service. This value indicates the maximum number
of accounts a user, or more specifically a set of credentials (=DN + FQANs), can be
mapped to. Normally this number is 1. But if each job should run under its own
account the number should be increased. Whether LCMAPS will actually use the
mapcounter depends on the LCMAPS interface being used. The lease name (or
poolindex) in the case of mapcounters looks like:
url_encoded(<DN>):mapcount=<mapnumber>)
-no_wildcard, -disablewildcard
When this option is set the plug-in will only match exact DNs, i.e.
/DC=org/DC=terena/DC=tcs/C=NL/* will not match.
-strict_poolprefix_match {yes|no}
If this is set to 'yes', a line in the grid-mapfile like <DN> .pool will result in
mapping pool accounts matching only the regexp pool[0-9]+. Otherwise it will be
allowed to match the wider range of pool.* (legacy behaviour).
RETURN VALUES
LCMAPS_MOD_SUCCESS
Success.
LCMAPS_MOD_FAIL
Failure.
ENVIRONMENT
GRIDMAP | GLOBUSMAP | globusmap | GlobusMap
When no grid-mapfile is specified as option to the plugin, it will try to obtain
the file location from one of these environment variables.
GRIDMAPDIR
When no gridmapdir is specified as option to the plugin, it will try to obtain the
file location from this environment variable.
NOTES
Since version 1.6.0 the poolaccount plugin also takes the requested username (such as
forwarded by gsissh) into consideration. When present, the resulting pool account has to
match it in order for the plugin to succeed. This requires LCMAPS version 1.6.0 or newer.
BUGS
Please report any errors to the Nikhef Grid Middleware Security Team <grid-mw-security-
support@nikhef.nl>.
SEE ALSO
lcmaps.db(5), lcmaps(3).
AUTHORS
LCMAPS and the LCMAPS plug-ins were written by the Grid Middleware Security Team <grid-mw-
security@nikhef.nl>.