docker-ldap-server/entrypoint.sh

#!/bin/sh

# Log everything to this log file
exec &> $ENTRYLOG

# Inspired by https://github.com/acobaugh/openldap-alpine

# When not limiting the open file descriptors, the memory consumption
# of slapd is absurdly high. See https://github.com/docker/docker/issues/8231
ulimit -n 8192

# If there's no cn=config database, initialize one.
# Take the original slapd.conf file as template.
if [ ! -d '/etc/openldap/slapd.d/cn=config' ]; then

	# Limit the access to the database
	SLAPD_CONFIG_ROOTPW=`< /dev/urandom tr -dc A-Za-z0-9 | head -c14; echo`
	
	# Generate a password hash
	config_rootpw_hash=`slappasswd -s "${SLAPD_CONFIG_ROOTPW}"`
	printf "$SLAPD_CONFIG_ROOTPW" > /etc/openldap/slapd.d/slapd_config_rootpw
	chmod 400 /etc/openldap/slapd.d/slapd_config_rootpw
	
	# Check if all certificates and keys are present 
	if 	[ ! -f ${SSL_PATH}/slurm.ch-rootCA.crt ] || \
		[ ! -f ${SSL_PATH}/ldap.slurm.ch.crt ] || \
		[ ! -f ${SSL_PATH}/ldap.slurm.ch.key ]; then
		echo "Not all certificates and keys found for TLS."
		exit 1
	fi
	
	# Use the original slapd.conf file
	cp /etc/openldap/slapd.conf /tmp/slapd.conf
	
	# Set the correct suffix
	sed -i -e "s/dc=my-domain,dc=com/${SUFFIX}/g" /tmp/slapd.conf
	sed -i -e "/core.schema/a include\t\t/etc/openldap/schema/cosine.schema" /tmp/slapd.conf
	sed -i -e "/cosine.schema/a include\t\t/etc/openldap/schema/inetorgperson.schema" /tmp/slapd.conf
	
	# Add configuration for TLS and set root password for config database.
	cat <<-EOF >> /tmp/slapd.conf
	TLSCACertificateFile ${SSL_PATH}/slurm.ch-rootCA.crt
	TLSCertificateFile ${SSL_PATH}/ldap.slurm.ch.crt
	TLSCertificateKeyFile ${SSL_PATH}/ldap.slurm.ch.key
	TLSCipherSuite HIGH:-SSLv2:-SSLv3
	
	database 	config
	rootDN 		"cn=admin,cn=config"
	rootPW 		$config_rootpw_hash
	EOF
	
	# Generate config database from slapd.conf file.
	echo Generating configuration
	slaptest -f /tmp/slapd.conf -F /etc/openldap/slapd.d
fi

# Set all ownerships straight.	
chown -R ldap:ldap /etc/openldap/slapd.d /etc/openldap/ssl /run/openldap

echo Starting slapd with $@
exec "$@"