docker-entrypoint.sh

#!/bin/bash
set -e

if [ "$1" = 'start' ]; then

  #get the current ip addr of the continer
  CONTAINER_IP_ADDR=$(/sbin/ip route|awk '/default/ { print $3 }')
	MODCLUSTER_PORT=${MODCLUSTER_PORT:-6666}
	MODCLUSTER_ADVERTISE=${MODCLUSTER_ADVERTISE:-On}
	MODCLUSTER_ADVERTISE_GROUP=${MODCLUSTER_ADVERTISE_GROUP:-224.0.1.105:23364}
	MODCLUSTER_NET=${MODCLUSTER_NET:-172.}
	MODCLUSTER_MANAGER_NET=${MODCLUSTER_MANAGER_NET:-$MODCLUSTER_NET}

	echo
	echo "Starting httpd with mod_cluster"
	echo "==============================="
	echo "MODCLUSTER_PORT            ${MODCLUSTER_PORT}"
	echo "MODCLUSTER_ADVERTISE       ${MODCLUSTER_ADVERTISE}"
	echo "MODCLUSTER_ADVERTISE_GROUP ${MODCLUSTER_ADVERTISE_GROUP}"
	echo "MODCLUSTER_NET             ${MODCLUSTER_NET}"
	echo "MODCLUSTER_MANAGER_NET     ${MODCLUSTER_MANAGER_NET}"
	echo "mod_cluster server advertise url: http://${CONTAINER_IP_ADDR}:${MODCLUSTER_PORT}"
	echo

	MOD_CLUSTER_CONF_PATH=${HTTPD_MC_BUILD_DIR}/conf/extra/mod_cluster.conf

	if grep -q FACTORY_DEFAULTS ${MOD_CLUSTER_CONF_PATH}; then
		# create mod-cluster.conf from environment variables
		echo "Creating ${MOD_CLUSTER_CONF_PATH} configuration file:"
		echo

		cat >${MOD_CLUSTER_CONF_PATH} <<EOT
LoadModule proxy_cluster_module modules/mod_proxy_cluster.so
LoadModule cluster_slotmem_module modules/mod_cluster_slotmem.so
LoadModule manager_module modules/mod_manager.so
LoadModule advertise_module modules/mod_advertise.so

MemManagerFile ${HTTPD_MC_BUILD_DIR}/cache/mod_cluster

<IfModule manager_module>
Listen ${MODCLUSTER_PORT}
  <VirtualHost ${CONTAINER_IP_ADDR}:${MODCLUSTER_PORT}>
		ErrorLog logs/mod_cluster_error.log
		CustomLog logs/mod_cluster.log common
		LogLevel debug
    <Directory />
      Require ip ${MODCLUSTER_NET}
    </Directory>
		AllowDisplay On
    ServerAdvertise ${MODCLUSTER_ADVERTISE} http://${CONTAINER_IP_ADDR}:${MODCLUSTER_PORT}
    AdvertiseGroup ${MODCLUSTER_ADVERTISE_GROUP}
    EnableMCPMReceive
    <Location /mcm>
      SetHandler mod_cluster-manager
      Require ip ${MODCLUSTER_MANAGER_NET}
   </Location>
  </VirtualHost>
</IfModule>
EOT

		cat ${MOD_CLUSTER_CONF_PATH}
		echo
	fi

	echo "-- Cleaning lock files."
	rm -f /opt/httpd-build/logs/httpd.pid
	rm -f /opt/httpd-build/logs/authdigest_shm.*

	echo "-- ${HTTPD_MC_BUILD_DIR}/bin/apachectl $@"
	${HTTPD_MC_BUILD_DIR}/bin/apachectl "$@"
else
	exec "$@"
fi