Martin Stejskal wrote:

I know there is slapd.conf to cn=config converter, but unfortunately I was not able to make it work (errors during conversion).

Could you please elaborate on that ideally with a slapd.conf for which the conversion fails?

CIao, Michael.

It took me a while, but finally I removed all bugs (hopefully) and it works as a charm.

Since I'm using Ubuntu 16, I'll provide complete manual for others who get lost. Note that in new versions of LDAP us usually used cn=config format, so I'll show how to create database in this format.

1) Install dev packages to be able compile sources (maybe you will need to install some additional packages)

$ sudo apt install gcc libdb-dev libsasl2-dev make libltdl-dev && echo "OK"

2) Make sure you do not have Ubuntu's LDAP server. If you're not sure sure, simply try following command and if it FAIL, it is OK. Otherwise you need to uninstall Ubuntu's LDAP, or change port settings in your custom LDAP server

$ sudo service slapd stop slapd: unrecognized service # This is OK, else uninstall slapd package

3) Simply remove (3A) or configure (3B) "apparmor" to avoid strange start failure and another "permission denied" errors. Choice is up to you (security vs convenience)

3A) Remove apparrmor $ sudo apt remove apparmor

3B) Configure apparmor

Create new file and add following lines (without "====" separator):

$ sudo vim /etc/apparmor.d/opt.openldap.libexec.slapd ============================================================================== # vim:syntax=apparmor # Last Modified: Fri Jan 4 15:18:13 2008 # Author: Jamie Strandboge jamie@ubuntu.com

#include <tunables/global>

/opt/openldap/libexec/slapd { #include <abstractions/base> #include <abstractions/nameservice> #include <abstractions/p11-kit>

#include <abstractions/ssl_certs> /etc/ssl/private/ r, /etc/ssl/private/* r,

/etc/sasldb2 r,

capability dac_override, capability net_bind_service, capability setgid, capability setuid,

/etc/gai.conf r, /etc/hosts.allow r, /etc/hosts.deny r,

# ldap files /opt/openldap/etc/openldap/** kr, /opt/openldap/etc/openldap/slapd.d/** rw,

# kerberos/gssapi /dev/tty rw, /etc/gss/mech.d/ r, /etc/gss/mech.d/* kr, /etc/krb5.keytab kr, /opt/openldap/var/tmp/ rw, /opt/openldap/var/tmp/** rw,

# the databases and logs /opt/openldap/var/openldap-data/ r, /opt/openldap/var/openldap-data/** rwk,

# lock file /opt/openldap/lib/alock kw,

# pid files and sockets /opt/openldap/var/run/* w, /opt/openldap/var/run/ldapi rw, /opt/openldap/var/run/socket rw,

/opt/openldap/lib/ r, /opt/openldap/lib/* mr,

/opt/openldap/libexec/slapd mr,

# Site-specific additions and overrides. See local/README for details. # #include <local/opt.openldap.libexec.slapd> } ==============================================================================

And restart "apparmor" service ($ sudo service apparmor restart)

4) configure - Enable "meta" and "ldap" backend + specific environment settings and install it.

sudo mkdir -p /opt/openldap/ && \ ./configure --enable-meta --enable-ldap --enable-spasswd \ --prefix=/opt/openldap/ && \ echo "Configure OK" && \ make -j4 depend && echo "Make depend OK" && make -j4 && echo "Make OK" && \ su root -c 'make install' && echo "Install OK"

5) Create new group "ldap_mod" for example and change rights.

$ sudo useradd -rMU ldap_mod && \ sudo touch /opt/openldap/var/run/slapd.pid \ /opt/openldap/var/run/slapd.m.args && \ sudo mkdir /opt/openldap/etc/openldap/slapd.d && \ sudo chown -R ldap_mod /opt/openldap/ && \ ls -l /opt/openldap/ && echo "All OK"

6) Create new service. Simply put following text to "/etc/init.d/ldap_mod" ============================================================================== #!/bin/sh ### BEGIN INIT INFO # Provides: slapd # Required-Start: $remote_fs $network $syslog # Required-Stop: $remote_fs $network $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: OpenLDAP standalone server (Lightweight Directory Access Protocol) ### END INIT INFO

# Specify path variable PATH=/opt/openldap/bin:/opt/openldap/libexec:/opt/openldap/sbin:/bin/:/usr/bin/:/sbin/

. /lib/lsb/init-functions

# Kill me on all errors set -e

# Set the paths to slapd as a variable so that someone who really # wants to can override the path in /etc/default/slapd. SLAPD=/opt/openldap/libexec/slapd

# Stop processing if slapd is not there [ -x $SLAPD ] || exit 0

# debconf may have this file descriptor open and it makes things work a bit # more reliably if we redirect it as a matter of course. db_stop will take # care of this, but this won't hurt. exec 3>/dev/null

# Source the init script configuration #if [ -f "/etc/default/slapd" ]; then # . /etc/default/slapd #fi # Instead of file, define it here. #SLAPD_CONF="/opt/openldap/etc/openldap/slapd.conf" SLAPD_CONF="/opt/openldap/etc/openldap/slapd.d" SLAPD_USER="ldap_mod" SLAPD_GROUP="ldap_mod" SLAPD_PIDFILE="/opt/openldap/var/run/slapd.pid" # Check ldap.conf SLAPD_SERVICES="ldap:/// ldapi:///"

# Additional options to pass to slapd #SLAPD_OPTIONS=" -d 0xFFFFFFFF -s 7" SLAPD_OPTIONS=" "

# Load the default location of the slapd config file if [ -z "$SLAPD_CONF" ]; then if [ -e /opt/openldap/etc/openldap/slapd.d ]; then SLAPD_CONF=/opt/openldap/etc/openldap/slapd.d else SLAPD_CONF=/opt/openldap/etc/openldap/slapd.conf fi fi

# Stop processing if the config file is not there if [ ! -r "$SLAPD_CONF" ]; then log_warning_msg "No configuration file was found for slapd at $SLAPD_CONF." # if there is no config at all, we should assume slapd is not running # and exit 0 on stop so that unconfigured packages can be removed. [ "x$1" = xstop ] && exit 0 || exit 1 fi

# extend options depending on config type if [ -f "$SLAPD_CONF" ]; then SLAPD_OPTIONS="-f $SLAPD_CONF $SLAPD_OPTIONS" elif [ -d "$SLAPD_CONF" ] ; then SLAPD_OPTIONS="-F $SLAPD_CONF $SLAPD_OPTIONS" fi

# Find out the name of slapd's pid file if [ -z "$SLAPD_PIDFILE" ]; then # If using old one-file configuration scheme if [ -f "$SLAPD_CONF" ] ; then SLAPD_PIDFILE=`sed -ne 's/^pidfile[[:space:]]+(.+)/\1/p' \ "$SLAPD_CONF"` # Else, if using new directory configuration scheme elif [ -d "$SLAPD_CONF" ] ; then SLAPD_PIDFILE=`sed -ne \ 's/^olcPidFile:[[:space:]]+(.+)[[:space:]]*/\1/p' \ "$SLAPD_CONF"/'cn=config.ldif'` fi fi

# XXX: Breaks upgrading if there is no pidfile (invoke-rc.d stop will fail) # -- Torsten if [ -z "$SLAPD_PIDFILE" ]; then log_failure_msg "The pidfile for slapd has not been specified" exit 1 fi

# Make sure the pidfile directory exists with correct permissions piddir=`dirname "$SLAPD_PIDFILE"` if [ ! -d "$piddir" ]; then mkdir -p "$piddir" [ -z "$SLAPD_USER" ] || chown -R "$SLAPD_USER" "$piddir" [ -z "$SLAPD_GROUP" ] || chgrp -R "$SLAPD_GROUP" "$piddir" fi

# Pass the user and group to run under to slapd if [ "$SLAPD_USER" ]; then SLAPD_OPTIONS="-u $SLAPD_USER $SLAPD_OPTIONS" fi

if [ "$SLAPD_GROUP" ]; then SLAPD_OPTIONS="-g $SLAPD_GROUP $SLAPD_OPTIONS" fi

# Check whether we were configured to not start the services. check_for_no_start() { if [ -n "$SLAPD_NO_START" ]; then echo 'Not starting slapd: SLAPD_NO_START set in /etc/default/slapd' >&2 exit 0 fi if [ -n "$SLAPD_SENTINEL_FILE" ] && [ -e "$SLAPD_SENTINEL_FILE" ]; then echo "Not starting slapd: $SLAPD_SENTINEL_FILE exists" >&2 exit 0 fi }

# Tell the user that something went wrong and give some hints for # resolving the problem. report_failure() { log_end_msg 1 if [ -n "$reason" ]; then log_failure_msg "$reason" else log_failure_msg "The operation failed but no output was produced."

if [ -n "$SLAPD_OPTIONS" -o \ -n "$SLAPD_SERVICES" ]; then if [ -z "$SLAPD_SERVICES" ]; then if [ -n "$SLAPD_OPTIONS" ]; then log_failure_msg "Command line used: slapd $SLAPD_OPTIONS" fi else log_failure_msg "Command line used: slapd -h '$SLAPD_SERVICES' $SLAPD_OPTIONS" fi fi fi }

# Start the slapd daemon and capture the error message if any to # $reason. start_slapd() { if [ -z "$SLAPD_SERVICES" ]; then echo "Running command: "$SLAPD" "$SLAPD_OPTIONS"" reason="`start-stop-daemon --start --verbose --oknodo \ --pidfile "$SLAPD_PIDFILE" \ --exec $SLAPD -- $SLAPD_OPTIONS 2>&1`" else echo "Running command: "$SLAPD" -h '"$SLAPD_SERVICES"' "$SLAPD_OPTIONS"" reason="`start-stop-daemon --start --verbose --oknodo \ --pidfile "$SLAPD_PIDFILE" \ --exec $SLAPD -- -h "$SLAPD_SERVICES" $SLAPD_OPTIONS 2>&1`" fi

echo "$reason"

# Backward compatibility with OpenLDAP 2.1 client libraries. #if [ ! -h /var/run/ldapi ] && [ ! -e /var/run/ldapi ] ; then # ln -s slapd/ldapi /var/run/ldapi #fi }

# Stop the slapd daemon and capture the error message (if any) to # $reason. stop_slapd() { reason="`start-stop-daemon --stop --quiet --oknodo --retry TERM/10 \ --pidfile "$SLAPD_PIDFILE" \ --exec $SLAPD 2>&1`" }

# Start the OpenLDAP daemons start_ldap() { trap 'report_failure' 0 log_daemon_msg "Starting OpenLDAP (custom)" "slapd" start_slapd trap "-" 0 log_end_msg 0 }

# Stop the OpenLDAP daemons stop_ldap() { trap 'report_failure' 0 log_daemon_msg "Stopping OpenLDAP (custom)" "slapd" stop_slapd trap "-" 0 log_end_msg 0 }

case "$1" in start) check_for_no_start start_ldap ;; stop) stop_ldap ;; restart|force-reload) check_for_no_start stop_ldap start_ldap ;; status) status_of_proc -p $SLAPD_PIDFILE $SLAPD slapd ;; *) echo "Usage: $0 {start|stop|restart|force-reload|status}" exit 1 ;; esac ==============================================================================

9) Create old-style slapd-meta_test.conf for example at your home directory. At sources is slapd-meta.conf, which can be your reference. Replace variables @SOMETHING@ with real data. There is my example which I save to my home directory: ============================================================================== # master slapd config -- for testing # $OpenLDAP$ ## This work is part of OpenLDAP Software http://www.openldap.org/. ## ## Copyright 1998-2016 The OpenLDAP Foundation. ## All rights reserved. ## ## Redistribution and use in source and binary forms, with or without ## modification, are permitted only as authorized by the OpenLDAP ## Public License. ## ## A copy of this license is available in the file LICENSE in the ## top-level directory of the distribution or, alternatively, at ## http://www.OpenLDAP.org/license.html.

include ./servers/slapd/schema/core.schema include ./servers/slapd/schema//cosine.schema include ./servers/slapd/schema/inetorgperson.schema include ./servers/slapd/schema/openldap.schema include ./servers/slapd/schema/nis.schema include ./servers/slapd/schema/ppolicy.schema pidfile /opt/openldap/var/run/slapd.pid argsfile /opt/openldap/var/run/slapd.m.args

#ldapmod#modulepath ../servers/slapd/back-ldap/ #ldapmod#moduleload back_ldap.la #metamod#modulepath ../servers/slapd/back-meta/ #metamod#moduleload back_meta.la #monitormod#modulepath ../servers/slapd/back-monitor/ #monitormod#moduleload back_monitor.la

# seems to improve behavior under very heavy load # (i.e. it alleviates load on target systems) threads 8

####################################################################### # database definitions #######################################################################

database meta suffix "dc=company,dc=com" rootdn "cn=binder,dc=company,dc=com" rootpw bind chase-referrals yes #nretries forever nretries 100 # 1 sec timeout for binds bind-timeout 1000000 #norefs true

# remote1 uri "ldap://somewhere.eu:389/ou=cz,dc=company,dc=com" # ubtree-exclude "ou=Excluded,ou=Meta,o=Example,c=US" suffixmassage "ou=cz,dc=company,dc=com" "dc=cz,dc=company,dc=eu" ###pseudorootdn "cn=manager,ou=meta,dc=example,dc=com" ###pseudorootpw secret idassert-bind bindmethod=simple binddn="cn=binder for CZ,dc=cz,dc=company,dc=eu" credentials="binders's secret password" mode=none flags=non-prescriptive #idassert-authzFrom "dn.exact:cn=Manager,o=Local"

# remote2 uri "ldap://somewhere.else.eu:389/ou=de,dc=company,dc=com" #subtree-include "dn.subtree:o=Example,c=US" suffixmassage "ou=de,dc=company,dc=com" "dc=company,dc=eu" ###pseudorootdn "cn=manager,dc=example,dc=com" ###pseudorootpw secret idassert-bind bindmethod=simple binddn="cn=binder for DE,dc=de,dc=company,dc=eu" credentials="binders's secret password2" mode=none flags=non-prescriptive #idassert-authzFrom "dn.exact:cn=Manager,o=Local"

#limits dn.exact="cn=Bjorn Jensen,ou=Information Technology Division,ou=People,o=Example,c=US" time=1 size=8

# This is only for binding as the rootdn #database meta #suffix "o=Local" #rootdn "cn=Manager,o=Local" #rootpw secret #uri "ldap://127.3.3.3:389/o=Local"

#monitor#database monitor

==============================================================================

7) Create new (void) directory: $ mkdir -p /tmp/slapd.d

8) Move/stay in directory with LDAP sources (so your modified paths will work) and convert old style-syntax to new one:

$ rm -rf /tmp/slapd.d/* && \ sudo touch /opt/openldap/var/run/slapd.pid \ /opt/openldap/var/run/slapd.m.args && \ ./servers/slapd/slaptest -f ~/slapd-meta_test.conf -F /tmp/slapd.d/ && \ echo "Conversion OK"

9) If conversion is OK, copy database to slapd.d

$ sudo rm -rf /opt/openldap/etc/openldap/slapd.d/* && \ sudo cp -r /tmp/slapd.d/* /opt/openldap/etc/openldap/slapd.d/ && \ sudo chmod 700 /opt/openldap/etc/openldap/slapd.d/ && \ sudo chown -R ldap_mod:ldap_mod /opt/openldap/ && \ echo "All right"

7) Update rc.d. This should be problem-less. Run it only once. It is enough.

$ sudo update-rc.d ldap_mod defaults && \ sudo update-rc.d ldap_mod enable && echo "All OK"

8) Try to run service. If it fails, you need to find out reason. Good start might be /var/log/syslog.

$ sudo service ldap_mod restart && echo OK

##############################################################################

I know that configuration files could be more flexible thanks to variables, but I wanted to keep it simple. Hopefully it will help someone and save some time.

Thanks again for great support!

Best regards Martin Stejskal

________________________________ From: openldap-technical openldap-technical-bounces@openldap.org on behalf of Martin Stejskal mstejskal@alps.cz Sent: 13 January 2017 10:24:42 To: Michael Ströder; openldap-technical@openldap.org Subject: Re: slapd-meta with olc

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Hi Michael, Quannah and Howard,

thanks for great support.

I've some progress, but I did not solved/tested problem yet (working on it). So I'll summarize my progress:

First of all, at Ubuntu 16 (and probably others as well) LDAP binary is compiled without "meta" support -> that caused some strange errors when I was trying for conversion -> need to build LDAP server from sources and install it on target system.

As reference I used "slapd-meta.conf" from sources. But there was some variables, which I had to change. For example I changed "@BACKEND@" to "./servers/slapd/schema/", "@URI@" to "ldap://127.0.0.1:389/" and so on.

Then convert command was successful:

$ slaptest -f ~/slapd-meta_test.conf -F /tmp/slapd.d/

If there will be some problem, I'll let you know. Also in case I'll run it successfully. I'll post manual as well.

Best regards

Martin Stejskal

________________________________ From: Michael Ströder michael@stroeder.com Sent: 13 January 2017 10:03:49 To: Martin Stejskal; openldap-technical@openldap.org Subject: Re: slapd-meta with olc

Martin Stejskal wrote:

I know there is slapd.conf to cn=config converter, but unfortunately I was not able to make it work (errors during conversion).

Could you please elaborate on that ideally with a slapd.conf for which the conversion fails?

CIao, Michael.