apache＋tomcat 實現負載平衡叢集

標籤：Proxy 伺服器   local   

環境介紹：

192.168.101.58

apacheProxy 伺服器

apache，apr，apr-util，tomcat－connector

192.168.101.62

tomcat-A伺服器

tomcat，jdk

192.168.101.63

tomcat-B伺服器

tomcat多執行個體，ajp_port：8019

192.168.101.63

tomcat-預設頁面伺服器

tomcat多執行個體，ajp_port：8029

apache支援兩種代理協議

    1.http

    2.ajp

tomcat及jdk的安裝略過。

編譯安裝apache的httpd

1、編譯安裝apr

[[email protected] src]# wget [[email protected] src]# tar -zxf apr-1.5.2.tar.gz[[email protected] src]# cd apr-1.5.2[[email protected] src]# ./configure --prefix=/usr/local/apr[[email protected] src]# make && make install

2、編譯安裝apr-util

[[email protected] src]# wget http://apache.fayea.com/apr/apr-util-1.5.4.tar.gz[[email protected] src]# tar -zxvf apr-util-1.5.4.tar.gz [[email protected] src]# cd apr-util-1.5.4[[email protected] src]# ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr/[[email protected] src]# make && make install

3、編譯安裝apache

3.1、安裝

[[email protected] src]# wget [[email protected] src]# tar -zxvf httpd-2.4.20.tar.gz[[email protected] src]# cd httpd-2.4.20[[email protected] src]#  ./configure --prefix=/usr/local/http --sysconfdir=/etc/httpd --enable-so --enable-ssl --enable-cgi --enable-rewrite --with-zlib --with-pcre --with-apr=/usr/local/apr --with-apr-util=/usr/local/apr-util --enable-mpms-shared=all --with-mpm=event --enable-proxy --enable-proxy-http --enable-proxu-ajp --enable-proxy-balancer --enable-lbmethod-heartbeat --enable-heartbeat  --enable-slotmem-shm --enable-slotmem-plain --enable-watchdog[[email protected] src]# make && make install

3.2、編寫啟動指令碼

[[email protected] src]# vim /etc/init.d/httpd

#!/bin/bash## httpd        Startup script for the Apache HTTP Server## chkconfig: - 85 15# description: Apache is a World Wide Web server.  It is used to serve #       HTML files and CGI.# processname: httpd# config: /etc/httpd/conf/httpd.conf# config: /etc/sysconfig/httpd# pidfile: /var/run/httpd.pid# Source function library.. /etc/rc.d/init.d/functionsif [ -f /etc/sysconfig/httpd ]; then        . /etc/sysconfig/httpdfi# Start httpd in the C locale by default.HTTPD_LANG=${HTTPD_LANG-"C"}# This will prevent initlog from swallowing up a pass-phrase prompt if# mod_ssl needs a pass-phrase from the user.INITLOG_ARGS=""# Set HTTPD=/usr/sbin/httpd.worker in /etc/sysconfig/httpd to use a server# with the thread-based "worker" MPM; BE WARNED that some modules may not# work correctly with a thread-based MPM; notably PHP will refuse to start.# Path to the apachectl script, server binary, and short-form for messages.apachectl=/usr/local/http/bin/apachectlhttpd=${HTTPD-/usr/local/http/bin/httpd}prog=httpdpidfile=${PIDFILE-/var/run/httpd.pid}lockfile=${LOCKFILE-/var/lock/subsys/httpd}RETVAL=0start() {        echo -n $"Starting $prog: "        LANG=$HTTPD_LANG daemon --pidfile=${pidfile} $httpd $OPTIONS        RETVAL=$?        echo        [ $RETVAL = 0 ] && touch ${lockfile}        return $RETVAL}stop() {echo -n $"Stopping $prog: "killproc -p ${pidfile} -d 10 $httpdRETVAL=$?echo[ $RETVAL = 0 ] && rm -f ${lockfile} ${pidfile}}reload() {    echo -n $"Reloading $prog: "    if ! LANG=$HTTPD_LANG $httpd $OPTIONS -t >&/dev/null; then        RETVAL=$?        echo $"not reloading due to configuration syntax error"        failure $"not reloading $httpd due to configuration syntax error"    else        killproc -p ${pidfile} $httpd -HUP        RETVAL=$?    fi    echo}# See how we were called.case "$1" in  start)start;;  stop)stop;;  status)        status -p ${pidfile} $httpdRETVAL=$?;;  restart)stopstart;;  condrestart)if [ -f ${pidfile} ] ; thenstopstartfi;;  reload)        reload;;  graceful|help|configtest|fullstatus)$apachectl [email protected]RETVAL=$?;;  *)echo $"Usage: $prog {start|stop|restart|condrestart|reload|status|fullstatus|graceful|help|configtest}"exit 1esacexit $RETVAL

3.3、啟動指令碼賦予許可權

[[email protected] src]# chmod +x /etc/init/d/httpd[[email protected] src]# chkconfig --add httpd

3.4、啟動apache（故障排查）

    3.4.1、查看httpd進程

[[email protected] src]# service httpd start[[email protected] src]# ps -ef |grep httpdroot     14445 14189  0 15:21 pts/0    00:00:00 grep httpd

    3.4.2、查看連接埠狀態

[[email protected] src]# netstat -tlnp |grep 80tcp        0      0 :::80            :::*          LISTEN      14300/httpd[[email protected] src]#

    3.4.3、查看錯誤記錄檔

[[email protected] src]# cat /usr/local/http/logs/error_log[Mon Jul 18 11:49:53.889462 2016] [proxy_balancer:emerg] [pid 14087:tid 140187546703616] AH01177: Failed to lookup provider ‘shm‘ for ‘slotmem‘: is mod_slotmem_shm loaded??[Mon Jul 18 11:49:53.889750 2016] [:emerg] [pid 14087:tid 140187546703616] AH00020: Configuration Failed, exiting[Mon Jul 18 11:50:01.041040 2016] [proxy_balancer:emerg] [pid 14127:tid 140379317155584] AH01177: Failed to lookup provider ‘shm‘ for ‘slotmem‘: is mod_slotmem_shm loaded??[Mon Jul 18 11:50:01.041275 2016] [:emerg] [pid 14127:tid 140379317155584] AH00020: Configuration Failed, exiting[Mon Jul 18 11:50:02.193534 2016] [proxy_balancer:emerg] [pid 14139:tid 140297643288320] AH01177: Failed to lookup provider ‘shm‘ for ‘slotmem‘: is mod_slotmem_shm loaded??

好像是slotmem模組沒有載入，編輯httpd設定檔啟用slotmem模組

[[email protected] src]# vim /etc/httpd/httpd.confLoadModule slotmem_shm_module modules/mod_slotmem_shm.soLoadModule slotmem_plain_module modules/mod_slotmem_plain.so

3.4.4、重新啟動測試

[[email protected] src]# service httpd start[[email protected] src]# ps -ef |grep httpdroot     14300     1  0 12:52 ?        00:00:00 /usr/local/http/bin/httpddaemon   14302 14300  0 12:52 ?        00:00:01 /usr/local/http/bin/httpddaemon   14303 14300  0 12:52 ?        00:00:01 /usr/local/http/bin/httpddaemon   14304 14300  0 12:52 ?        00:00:01 /usr/local/http/bin/httpdroot     14443 14428  0 15:17 pts/1    00:00:00 vim /etc/init.d/httpdroot     14451 14189  0 15:28 pts/0    00:00:00 grep httpd[[email protected] src]# netstat -tlnp |grep 80tcp        0      0 :::80          :::*            LISTEN      14300/httpd

4、編譯apache的jk模組

[[email protected] src]# wget [[email protected] src]# tar -zxvf tomcat-connectors-1.2.41-src.tar.gz [[email protected] src]# cd tomcat-connectors-1.2.41-src/native/[[email protected] native]# ./configure --with-apxs=/usr/local/http/bin/apxs[[email protected] native]# make && make install

5、配置（在httpd.conf中virtual host中添加jk的設定檔）

[[email protected] native]# vim /etc/httpd/httpd.confinclude /etc/httpd/extra/httpd-jk.conf

5.1編輯httpd-jk.conf

[[email protected] native]# vim /etc/httpd/extra/httpd-jk.confLoadModule jk_module modules/mod_jk.soJkWorkersFile /etc/httpd/extra/workers.propertiesJkLogFile logs/mod_jk.logJkLogLevel errorJkMount /* controller

說明：

    LoadModule：表示裝載模組

    JkWorkersFile：定義workers屬性的設定檔

    JkLogFile：       定義work日誌的路徑

    JkMount：        將/下的所有請求都交給controller叢集處理，controller必須要在workers.properties中定義，否則報錯    

5.2、編輯workers.properties設定檔，增加如下內容

worker.list＝controller                ＃定義控制器#========tomcat1========worker.tomcat1.port=8009               ＃tomcat的ajp連接埠worker.tomcat1.host=192.168.101.62     ＃tomcat的ipworker.tomcat1.type=ajp13              ＃ajp協議版本，目前1.3worker.tomcat1.lbfactor=1              ＃權重#========tomcat2========worker.tomcat2.port=8019worker.tomcat2.host=192.168.101.63worker.tomcat2.type=ajp13worker.tomcat2.lbfactor=1#========tomcat3========worker.tomcat3.port=8029worker.tomcat3.host=192.168.101.63worker.tomcat3.type=ajp13worker.tomcat3.lbfactor=1#========controllerServer Load Balancer控制器========worker.controller.type=lb                          #指定controller類型worker.controller.balanced_workers=tomcat1,tomcat2,tomcat3 #指定Server Load Balancer的tomcatworker.controller.sticky_session=true              #指定是否粘性sessionworker.controller.sticky_session_force=falseworker.connection_pool_size=3000worker.connection_pool_minsize=50worker.connection_pool_timeout=50000# session配置說明:  #當sticky_session,sticky_session_force都為true時不複製session,  #sticky_session_force=false指叢集中某台伺服器多次請求沒有響應,則轉寄到其它伺服器處理,  #sticky_session=false不使用粘性session,同時配置不複製session時,注意轉寄請求後可能會找不到原來的session.

到此，配置完成。下面訪問http://192.168.101.58測試。

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本部落格參照了：http://cuisuqiang.iteye.com/blog/2070526  文章，望大神勿怪。

本文出自 “初心、始終” 部落格，請務必保留此出處http://gouyc.blog.51cto.com/1594451/1827470

apache＋tomcat 實現負載平衡叢集