docker-openldap/image/service/slapd/process.sh

#!/bin/bash -e

# set -x (bash debug) if log level is trace
# https://github.com/osixia/docker-light-baseimage/blob/stable/image/tool/log-helper
log-helper level eq trace && set -x

# Reduce maximum number of number of open file descriptors to 1024
# otherwise slapd consumes two orders of magnitude more of RAM
# see https://github.com/docker/docker/issues/8231
ulimit -n $LDAP_NOFILE

# Call hostname to determine the fully qualified domain name. We want OpenLDAP to listen
# to the named host for the ldap:// and ldaps:// protocols.
FQDN="$(/bin/hostname --fqdn)"
HOST_PARAM="ldap://$FQDN:$LDAP_PORT ldaps://$FQDN:$LDAP_PORT"
exec /usr/sbin/slapd -h "$HOST_PARAM ldapi:///" -u openldap -g openldap -d "$LDAP_LOG_LEVEL"