NAME

regather - LDAP syncrepl consumer script to perform actions desired on syncrepl event.

SYNOPSIS

regather [-h|--help|-? -F] <-c regather.conf> [ -C section.option=value, ... ]

DESCRIPTION

regather is a LDAP syncrepl consumer to generate ( re-gather ) files on LDAP syncrepl events or even more, it can perform any action you set (like create/delete directories or other).

regather performs all actions through plugins. Plugins currently implemented you can know with option --plugin-list

It uses Net::LDAP(3) to do all LDAP related stuff and Template to generate files. Config file is processed with Config::Parser (look CONFIG FILE section bellow)

As an example, regather can re-write each OpenVPN client config file on change done to client LDAP configured data, or re-write CRL file on update in LDAP or change sieve script for mail user.

regather is configured via it's configuration file. Each configuration option can be set/overidden via CLI options like -C section.subsection.subsubsection.option=value

regather connects to LDAP ldap.opt.uri configured and performs search with ldap.srch.filter which has to provide search result for all configured services

Search results are used to provide data for plugins.

Module Template(3) is used to write target file, using configured core.tt_path/service.XXX.tt_file

Net::DNS(3) is used to nsupdate dyn zones.

OPERATIONS

On LDAP repl event, consumer receives syncstate, we process these three:

• LDAP_SYNC_ADD

• LDAP_SYNC_MODIFY

• LDAP_SYNC_DELETE

on LDAP_SYNC_ADD and LDAP_SYNC_MODIFY we just overwrite all configured for the service things (files, directories e.t.c.)

ModRDN event comes as LDAP_SYNC_MODIFY, and since in DN it has the new RDN, the only way to know the old one (to delete all resources related to it, first) we need search accesslog DB (see slapo-accesslog(5)) for the attribute reqNewRDN=new-RDN

LDAP_SYNC_DELETE differs a bit, it can be spawned by deletion of LDAP object itself or by deletion of some attribute of the object. So, on that event we restore previous state of the object from accesslog DB (which is mandatory for our work) and look at the attribute reqType value.

There are two cases we take care of:

reqType = delete

this is the deletion of the whole object and we destroy all related stuff, configured for that service.

reqType = modify

this is (except the case with ModRDN) the deletion of an attribute and we need to know whether it was ctrl_attr one (look CONFIG FILE section bellow). If it is, then we destroy all related stuff, configured in service.

OPTIONS

-c | --config

absolute (or relative to core.altroot directory) path to config file, it must be owned by root and must not be group and world accessible. (mandatory)

-f | --foreground

run in foreground (optional)

-F | --force

force re-generation of resources configured regardless existent file mtime and LDAP object modifiedTimestamp

-S | --strict

exit on serverside LDAP errors (connection, server restart, etc). If not set, regather will try connect infinetely. (default: not set)

--colors

terminal colors are used in foreground debug output. (optional)

-C | --cli section.option = value

CLI equivalent to config file options. (optional, can be multiple)

for example core.dryrun=1 (for full list of options available see Regather::Conf(3))

--config-help

print config file lexicon (require option -c, set)

--plugin-list

available plugins list

-v

verbosity (optional, incremental)

-h | --help

help page

--version

shows version

EXAMPLES

regather -c /some/regather.conf.config-tiny -C core.altroot=/tmp/regather-altroot.d -C core.tt_path=/path/regather.d --colors -f -Fvvv

this does next:

• use separate config file

• use alternate-to-config-file-defined directory to place the results to

• use alternate-to-config-file-defined directory for templates

• use terminal colors in foreground and force re-generation of service files

FILES

    /usr/local/etc/regather.d/*.tt templates to generate files from
    /usr/local/etc/regather.conf   config file

    /usr/local/etc/openldap/ldap.conf
    /etc/ldap.conf
    /etc/ldap/ldap.conf
    /etc/openldap/ldap.conf

CONFIG FILE

config file format is described in Regather::Config documentation.

SIGNALS

HUP - restart

INT, QUIT, ABRT, TERM - terminate

BUGS

• replication related missfunction can not be identified

  It is rather feature than bug. Sometimes replication related problem/s which does not break slapd(8c) functionality, occures. For example, when master ACL are not set properly, some needed object, finally will be absent on replica side and in slapd log file you can see this:

  LDAP_RES_SEARCH_RESULT (53) Server is unwilling to perform

  for now I don't know the way to catch it.

• no action can be taken for objects not present in accesslog DB

  It is, as well, rather feature than bug. While creatin of target resource (LDAP_SYNC_ADD) uses currently present in LDAP objects, delete (LDAP_SYNC_DELETE) event is using accesslog information. If for some reason this information is absent, then target resource which was created before, won't be deleted.

  So you need to delete it by hands. Or you can delete all target directory files and restart regather.

SEE ALSO

Net::LDAP(3), Net::LDAP::Control::SyncRequest(3) Template(3), App::Regather::Config(3) slapo-accesslog(5)

AUTHOR

Zeus Panchenko <zeus@gnu.org.ua>

COPYRIGHT

Copyright 2020 Zeus Panchenko.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

cpanm App::Regather

perl -MCPAN -e shell
install App::Regather