公司的tomcat服務器java虛擬機運行不穩定，爲了安全考慮，安裝monit自監控。
Monit是一款功能非常豐富的進程、文件、目錄和設備的監測軟件，用於Unix平臺。它可以自動修復那些已經停止運作的程序，特使適合處理那些由於多種原因導致的軟件錯誤。服務能“死而復生”。
官網 http://mmonit.com/monit/documentation/monit.html
一、安裝
#tar -zxvf monit-5.8.1.tar.gz
#cd monit-5.8.1
#./configure --prefix=/usr/local/monit \
--without-pam \
--sysconfdir=/usr/local/monit/etc
#make&make install
#cp -a monit-5.8.1/monitrc /usr/local/monit/etc
#chmod 700 /usr/local/monit/etc/monitrc
二、配置文件
#vim /urs/local/monit/etc/monitrc
set daemon 300 #設置多少時間監測一次，單位爲秒
set logfile /usr/local/monit/log/monit.log #設置日誌文件位置
set mailserver smtp.xxxxx.com USERNAME "" PASSWORD "" #設置報警郵箱
set mail-format { from: 任意取名@域名 } #設置報警郵件格式，則收到的報警都是來自任 意取名@域名 這個郵箱
set alert 接收報警郵件的郵箱 #設置接收報警郵件的郵箱、有多個的話相同格式另取一行。
set httpd port 2812 and
use address 本機ip # only accept connection from localhost
allow ip（能訪問的ip） # allow localhost to connect to the server
allow admin:ccmonit # require user 'admin' with password 'monit'
allow @monit # allow users of group 'monit' to connect (rw)
allow @users readonly # allow users of group 'users' to connect readonly
#自監控tomcat
check host tomcat with address ip（本機ip）
start program = "/usr/local/tomcat/bin/catalina.sh start"
stop program = "/usr/local/tomcat/bin/shutdown.sh"
if failed
port 80
protocol http
request "/test/time.jsp" #時間測試頁面
then restart
if 4 restarts within 4 cycles then unmonitor #如果連續重啓4次都不能啓動tmcat則停止重啓
三、測試頁
#cd /usr/local/tomcat/webapps/
#mkdir test
#cd test
#vim time.jsp （顯示系統當前時間）
<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
function gettime(){
var d = new Date();
document.getElementById("t").innerHTML =d;
window.setTimeout("gettime()",1000);
}
window.onload = gettime;
</SCRIPT>
</HEAD>
<BODY>
<div id="t">
</div>
</BODY>
</HTML>訪問http：//ip/test/time.jsp驗證
四、monit init腳本
#!/bin/bash
#
# Init file for Monit
#
#
# chkconfig: - 80 20
# description: monit daemon
#
# processname: monit
source /etc/rc.d/init.d/functions
### Default variables
CONFIG="/usr/local/monit/etc/monitrc"
[ -x /usr/local/monit/bin/monit ] || exit 1
[ -r "$CONFIG" ] || exit 1
bin_path=/usr/local/monit/bin
RETVAL=0
prog="monit"
desc="Monit daemon"
start() {
echo -n $"Starting $desc ($prog): "
daemon $bin_path/$prog -c "$CONFIG"
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
return $RETVAL
}
stop() {
echo -n $"Shutting down $desc ($prog): "
killproc $prog
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog
return $RETVAL
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading $desc ($prog): "
killproc $prog -HUP
RETVAL=$?
echo
return $RETVAL
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
reload)
reload
;;
condrestart)
[ -e /var/lock/subsys/$prog ] && restart
RETVAL=$?
;;
status)
#status $prog
$bin_path/$prog status
RETVAL=$?
;;
*)
echo $"Usage: $0 {start|stop|restart|reload|condrestart|status}"
RETVAL=1
esac
exit $RETV五、管理進程
#service monit monitor name|all 啓動對某服務|所有服務的監控
#service monit unmonitor name|all 關閉對某服務|所有服務的監控
#service monit start name|all 啓動某服務|所有服務
#service monit stop name|all 關閉某服務|所有服務
#service monit status 顯示監控的服務狀態