memcached 进程启动及监控
1.memcached_inc.sh
设置路径，端口等讯息。
#!/bin/sh
#config include
HOST=$(hostname)
SITE="mysite"
PORT=11211
MEMCACHED_PID_FILE="/tmp/memcached.pid"
MEMCACHED_DAEMON_PID_FILE="/tmp/memcached_daemon.pid"
MEMCACHED="memcached -d -m 64 -p $PORT -u memcache -l 127.0.0.1 -P $MEMCACHED_PID_FILE"
MEMCACHED_DAEMON_FILE="memcached_daemon.sh"
ERROR_LOG_FILE="${ROOT}/memcached_${SITE}_${HOST}_${PORT}.log"
2.gm_memcached.sh
控制memcached 启动，停止，重启。
#!/bin/sh
#memcached start and stop
#$1 action
ROOT=$(cd "$(dirname "$0")"; pwd)
. ${ROOT}/memcached_inc.sh
start() {
if [ -f "$MEMCACHED_PID_FILE" ] && [ -s "$MEMCACHED_PID_FILE" ]; then
printf "memcached already running\n"
else
printf "starting memcached\n"
$MEMCACHED
sleep 2
PID=$(cat $MEMCACHED_PID_FILE)
printf "memcached is started PID:$PID\n"
printf "starting memcached daemon\n"
${ROOT}/${MEMCACHED_DAEMON_FILE} &
DAEMON_PID=$!
echo ${DAEMON_PID} > ${MEMCACHED_DAEMON_PID_FILE}
printf "memcached daemon is started PID:${DAEMON_PID}\n"
fi
}
stop() {
if [ -f "$MEMCACHED_DAEMON_PID_FILE" ] && [ -s "$MEMCACHED_DAEMON_PID_FILE" ]; then
DAEMON_PID=$(cat $MEMCACHED_DAEMON_PID_FILE)
rm -f ${MEMCACHED_DAEMON_PID_FILE}
if [ ! -z ${DAEMON_PID} ]; then
kill -9 ${DAEMON_PID}
fi
printf "memcached daemon is stopped\n"
else
printf "no memcached daemon running\n"
fi
sleep 1
if [ -f "$MEMCACHED_PID_FILE" ] && [ -s "$MEMCACHED_PID_FILE" ]; then
PID=$(cat $MEMCACHED_PID_FILE)
rm -f ${MEMCACHED_PID_FILE}
if [ ! -z ${PID} ]; then
kill -9 ${PID}
fi
printf "memcached is stopped\n"
else
printf "no memcached running\n"
fi
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 3
start
;;
*)
printf "Usage:$0 {start|stop|restart}\n"
exit 1
esac
exit 0
3.memcached_daemon.sh
监控memcached 进程，如进程失效则自动启动。
#!/bin/sh
#memcached daemon
ROOT=$(cd "$(dirname "$0")"; pwd)
. ${ROOT}/memcached_inc.sh
while :
do
if [ -f "$MEMCACHED_PID_FILE" ] && [ -s "$MEMCACHED_PID_FILE" ]; then
PID=$(cat $MEMCACHED_PID_FILE)
else
PID=""
fi
if [ -z "$PID" ] || [ -z $(ps aux|awk '{print $2}' | grep "^$PID$") ]; then
$MEMCACHED
sleep 1
printf "[$(date +%Y-%m-%d' '%H:%M:%S)] ${SITE} ${HOST} memcached ${PORT} is restarted\n" >> $ERROR_LOG_FILE
echo "Subject: ${SITE} ${HOST} memcached ${PORT} is restarted $(date +%Y-%m-%d' '%H:%M:%S)" | sendmail me@gmail.com
fi
sleep 5
done
exit 0
使用方法：
./gm_memcached.sh start #启动memcached
./gm_memcached.sh stop #停止memcached
./gm_memcached.sh restart #重启memcached
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