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#!/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 $CTDB_INIT_STYLE in
redhat)
service_name="httpd"
;;
suse|debian|*)
service_name="apache2"
;;
esac
load_script_options
ctdb_setup_state_dir "service" "$service_name"
# 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
}
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
|
