#!/bin/sh
# event script to manage httpd in a cluster environment

[ -n "$CTDB_BASE" ] || \
    CTDB_BASE=$(d=$(dirname "$0") ; cd -P "$d" ; dirname "$PWD")

. "${CTDB_BASE}/functions"

detect_init_style

case $CTDB_INIT_STYLE in
redhat)
	service_name="httpd"
	# service_config is used by loadconfig()
	# shellcheck disable=SC2034
	service_config="http"
	;;
suse|debian|*)
	service_name="apache2"
	# service_config is used by loadconfig()
	# shellcheck disable=SC2034
	service_config="apache2"
	;;
esac

# RHEL5 sometimes use a SIGKILL to terminate httpd, which then leaks
# semaphores.  This is a hack to clean them up.
cleanup_httpd_semaphore_leak() {
    killall -q -0 "$service_name" ||
    for i in $(ipcs -s | awk '$3 == "apache" { print $2 }') ; do
	ipcrm -s "$i"
    done
}

##########

service_start ()
{
    cleanup_httpd_semaphore_leak
    service $service_name start
}
service_stop ()
{
    service $service_name stop
    killall -q -9 $service_name || true
}

loadconfig

is_ctdb_managed_service || exit 0

case "$1" in
startup)
	service_start
	ctdb_counter_init
	;;

shutdown)
	service_stop
	;;

monitor)
	if ctdb_check_tcp_ports 80 >/dev/null 2>/dev/null ; then
		ctdb_counter_init
	else
		ctdb_counter_incr
		num_fails=$(ctdb_counter_get)
		if [ "$num_fails" -eq 2 ] ; then
			echo "HTTPD is not running. Trying to restart HTTPD."
			service_stop
			service_start
			exit 0
		elif [ "$num_fails" -ge 5 ] ; then
			echo "HTTPD is not running. Trying to restart HTTPD."
			service_stop
			service_start
			exit 1
		fi
	fi
	;;
esac

exit 0