WEB应用监控与自动重启的程序和脚本

fX\#}4yb[*OrU0首先是在root用户的crontab中添加如下一行：
xjL'[1X$NbbH0*/5 * * * * /xxx/xxx/monitorM2U.sh

&peSo9o(R,n] T0~0即每5分钟执行一下脚本/xxx/xxx/monitorM2U.sh，这个脚本的内容是：51Testing软件测试网*P$fv5CX:{)n5c

8E s9I7cW[0cd /xxx/xxx/xxx/classes;

2f.A5slxZQm9]^0nohup “${JAVA_HOME}”/bin/java –cp ".:${CLASSPATH} " com.mdcchina.m2u.monitor.ResponseMonitor &

其中com.mdcchina.m2u.monitor.ResponseMonitor的代码是：

/*

 * Created on 2005-9-851Testing软件测试网J
]8XYx dw

 *51Testing软件测试网wY5qI},^&T9z)SP1la

"sGBx C_\5}G-fl0 */

@L8d~ W~Or`p0package com.mdcchina.m2u.monitor;51Testing软件测试网X&G#JCpARI

+\ TP JT7Bje&}/GE0import java.io.IOException;51Testing软件测试网(lq%nyD7y

z^-I3{/rR8c0import java.util.Date;51Testing软件测试网)c2f!dw7FD%r4YZ

1j n)AIB!i0import org.apache.commons.httpclient.HttpClient;

K#`$y7NIJx0import org.apache.commons.httpclient.methods.GetMethod;51Testing软件测试网+^#zV`JD D

/**51Testing软件测试网
Yl*b;KW JI \]

AG;_*pe0 * @author Hao Wei 监控m2u进程是否能够访问，如果不能就重启之51Testing软件测试网?wMVG~5i} i1q

!W*t's)WG%V0 */

;MeIh#Q)@,J9H^ U0public class ResponseMonitor {

2Bl1} I#H4N0    public static void main(String[] args) {51Testing软件测试网sE q9FkK0`-do!V'x

9R,s4I Tx+B }C0|!vG0        if (!new ResponseMonitor()51Testing软件测试网h8f
oX)e|,Dh#G

d8l^e)m0                . canRequest ("http://www.m2u.cn/albumshare/benber")) { //用来监控的地址

            log("FATAL ERROR!!!!!!!!!!!!!\nM2U cannot be visit, it will be restarted!");

/**

*                 在此可加入发送短信报警或记录失败日志的代码

k9OL$u*[6y*P/s8U0**/51Testing软件测试网JWU jS$W0t

-CfF0HK/F0            try {51Testing软件测试网_"xh0^w&v{G$p$L

!J zF5kj\` X$|P#]0                String script. = "/xxx/xxx/restart_tomcat.sh";51Testing软件测试网a eTNB

LZ7X}N,` `0                Process proc = Runtime.getRuntime().exec("/bin/sh " + script); //调用脚本进行重启51Testing软件测试网&B ~#u^9Y0K.LW-a

                log("execute: " + script);51Testing软件测试网,T3{kV o q

                log(""+proc.waitFor());

                log("===========M2U process was restarted!====== ======");

5r4q8M5V{s0            } catch (IOException e) {

2Dj+~h)nk#E2\TB"?0                log("M2U cannot be restart!!!!!!!!!!!!\n" + e.getStackTrace());

            }

.i:OGvM;U s4l%P*C0            catch( InterruptedException e1){

a z*gq H[0                log("M2U cannot be restart!!!!!!!!!!!!\n" + e1.getStackTrace());

T0xr'}jWS%k0            }51Testing软件测试网1OS.@ ^7T }&H.S

        } else {51Testing软件测试网|['O9Ck3{j,i,g

i/W_+bO0            log("M2U OK!");51Testing软件测试网5lV_ oi;?+J5r lYzx

+fIYP&NVY0        }51Testing软件测试网0mB|`$WA

C!K(A ~gGN6X5N0    }

    private static void log(Object obj) {

        System.out.println("::::MONITOR::::|" + new Date() + "|" + obj);

"h5N1Q3R+u1HL*K0    }51Testing软件测试网&BZ2Y$Q/Jsc)q0oRa

    public boolean canRequest(String url) {

4B{"K!dl6T"S QG{z0        boolean success = false;

!DU uu\,HTx0        HttpClient client = null;51Testing软件测试网%a {WZ l9NW-V

        GetMethod getMethod = null;

$Cw1t wr3qee0        try {51Testing软件测试网WLh6f$YV-V

8vyWvR8v^A*a0            client = new HttpClient();

            log("<<<< begin send http request to " + url);

            getMethod = new GetMethod(url);

            client.setConnectionTimeout(40 * 1000);

            client.setTimeout(40 * 1000);51Testing软件测试网%R4o,lT'|X

};b6ik'w4m0            client.setHttpConnectionFactoryTimeout(40 * 1000);51Testing软件测试网"Of7pd9c0O

            client.executeMethod(getMethod);51Testing软件测试网;P1O&B:c%utA

            log("response code : " + getMethod.getStatusCode());

            if (getMethod.getStatusCode() < 300) {51Testing软件测试网mp%w V0U@7P7_

                success = true;

            }51Testing软件测试网0u*KC [d;G}

        } catch (IOException ex) {51Testing软件测试网
K/r^Luru7m)A

            log("ERROR\n" + ex.getStackTrace());

;| Gt[+v+X-__ KV-G0            success = false;

        } finally {

-X.|aXs(g0w0            try {

                if (getMethod != null) {

M&K n:lyqN0                    getMethod.releaseConnection();

                }51Testing软件测试网XK2?g:^5NO3o+K4J

9{ mF
n y~ \0            } catch (Exception ex2) {51Testing软件测试网hrs*E}"b

Q-[T_I a0            }

            try {

+P.|*q%^4[,Q3ISiL0                if (client != null) {

                    client.endSession();51Testing软件测试网5bF [!\[

                }51Testing软件测试网,L(G'e'f!O8fDx"a'J ^

            } catch (Exception ex1) {51Testing软件测试网9]W~#f9u:z ]

"qsjk;lZ1u$BU0            }

            client = null;51Testing软件测试网n?PASk'C}0yP

        }

        log("<<<< end send http request to " + url);51Testing软件测试网QK9r~Nh2Q` K E

2oz8Ttl){ S%F'@t0        return success;51Testing软件测试网jc3Q
iu Rm.K

I.f9M,|"S2Hi0    }

4^)x$m,Ky b g$e0}

其中，这个java程序调用的重启tomcat的脚本/xxx/xxx/restart_tomcat.sh内容如下：

$S;t!Caa ~0/xxx/xxx/get_tomcat_pid.sh | while read PID

do

kill -9 "${PID}" &

done51Testing软件测试网#Wuk*yc"J)s7V

su - mytt -c "cd ${CATALINA_HOME}/bin; ./startup.sh"51Testing软件测试网_.V,s#il}

j$Y+\'qA0其中，找到tomcat主进程号的脚本/xxx/xxx/get_tomcat_pid.sh内容如下：

b0croe0ps -efww|grep tomcat | while read PROCESS

do

PID2=`echo "${PROCESS}" | awk '{printf ("%s\n",$3)}'`51Testing软件测试网0fDpY4U
i@+o

6t;l#T'jH*F]Y0         if [ "${PID2}" == "1" ]; then

                 PID1=`echo "${PROCESS}" | awk '{printf ("%s\n",$2)}'`

                        echo "${PID1}"51Testing软件测试网r`-GEor2{

q}%`&\d p0         else51Testing软件测试网p(M&G&I2oGzG

"\(@0{ f!SF0                 continue51Testing软件测试网!i4I*m7}Y&C.@_q

,Sgh(}4z3e0         fi

done