tomcat結合nginx或apache作負載均衡及session綁定

時間 2019-11-12

標籤 tomcat 結合 nginx apache 負載均衡 session 綁定欄目 Tomcat 简体版

原文原文鏈接

一、tomcat結合nginx作負載均衡，session綁定html

nginx：192.168.223.136 tomcat：192.168.223.146：8081，192.168.223.146：8082這裏使用tomcat的多實例作示例node

upstream backserver {
　　server 192.168.223.146:8081 weight=1;
　　server 192.168.223.146:8082 weight=1;
}nginx

location / {
　　root html;
　　index index.html index.htm;
　　proxy_pass http://backserver/;
}apache

負載均衡已實現，如今進行session會話綁定：後端

upstream backserver {
　　ip_hash;
　　server 192.168.223.146:8081 weight=1;
　　server 192.168.223.146:8082 weight=1;
}centos

而後無論怎麼訪問，源ip相同的都會被派日後端的同一臺tomcat實例tomcat

二、tomcat結合apache作負載均衡，session綁定（apache與tomcat基於http協議）session

httpd2.4以上版本，編譯安裝192.168.223.136，tomcat仍是多實例192.168.223.146：8081，192.168.223.146：8082負載均衡

httpd配置：vhosts.confjvm

<proxy balancer://lbcluster>
　　BalancerMember http://192.168.223.146:8081 loadfactor=1 route=tomcat1 這裏route對應後端tomcat的配置文件的engine設置：<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">
　　BalancerMember http://192.168.223.146:8082 loadfactor=1 route=tomcat2
</proxy>

<VirtualHost *:80>
　　ServerName 192.168.223.136
　　proxyVia On
　　ProxyRequests Off
　　ProxyPreserveHost On
　　<Proxy *>
　　　　Require all granted
　　</Proxy>
　　ProxyPass / balancer://lbcluster/
　　ProxyPassReverse / balancer://lbcluster/
　　<Location />
　　　　Require all granted
　　</Location>
</VirtualHost>

配置以後一直不見出現80端口，查看error日誌：

[root@node1 ~]# tail -f /usr/local/apache2.4/logs/error_log
[Wed Aug 09 13:41:53.523457 2017] [mpm_prefork:notice] [pid 85758] AH00169: caught SIGTERM, shutting down
[Thu Aug 10 09:54:14.263767 2017] [proxy_balancer:emerg] [pid 88118] AH01177: Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded??
[Thu Aug 10 09:54:14.263926 2017] [:emerg] [pid 88118] AH00020: Configuration Failed, exiting
[Thu Aug 10 09:54:26.284340 2017] [proxy_balancer:emerg] [pid 88123] AH01177: Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded??
[Thu Aug 10 09:54:26.284427 2017] [:emerg] [pid 88123] AH00020: Configuration Failed, exiting
[Thu Aug 10 09:55:07.894942 2017] [proxy_balancer:emerg] [pid 88135] AH01177: Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded??
[Thu Aug 10 09:55:07.895056 2017] [:emerg] [pid 88135] AH00020: Configuration Failed, exiting
[Thu Aug 10 09:57:00.483255 2017] [proxy:crit] [pid 88148] AH02432: Cannot find LB Method: byrequests
[Thu Aug 10 09:57:00.483388 2017] [proxy_balancer:emerg] [pid 88148] (22)Invalid argument: AH01183: Cannot share balancer
[Thu Aug 10 09:57:00.483420 2017] [:emerg] [pid 88148] AH00020: Configuration Failed, exiting

根據錯誤提示，在配置文件中開啓相應的模塊：

LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so

LoadModule slotmem_shm_module modules/mod_slotmem_shm.so

LoadModule proxy_balancer_module modules/mod_proxy_balancer.so

LoadModule proxy_http_module modules/mod_proxy_http.so

LoadModule proxy_module modules/mod_proxy.so

解決完後，開啓服務後訪問網站：

負載均衡已成功實現，如今將session會話進行綁定：

Header add Set-Cookie "ROUTEID=.%{BALANCER_WORKER_ROUTE}e; path=/" env=BALANCER_ROUTE_CHANGED
<proxy balancer://lbcluster>
　　BalancerMember http://192.168.223.146:8081 loadfactor=1 route=tomcat1
　　BalancerMember http://192.168.223.146:8082 loadfactor=1 route=tomcat2
　　ProxySet stickysession=ROUTEID
</proxy>

<VirtualHost *:80>
　　ServerName 192.168.223.136
　　proxyVia On
　　ProxyRequests Off
　　ProxyPreserveHost On
　　<Proxy *>
　　　　Require all granted
　　</Proxy>
　　ProxyPass / balancer://lbcluster/
　　ProxyPassReverse / balancer://lbcluster/
　　<Location />
　　　　Require all granted
　　</Location>
</VirtualHost>

proxyVia On：

三、tomcat結合apache作負載均衡，session綁定（apache與tomcat基於ajp協議）

只須要將上面的配置文件修改成ajp協議就行，這裏省略

四、tomcat結合apache作負載均衡，session綁定（apache與tomcat基於mod_jk模塊）

　　一、編譯安裝mod_jk模塊

　　wget http://archive.apache.org/dist/tomcat/tomcat-connectors/jk/tomcat-connectors-1.2.41-src.tar.gz

　　cd tomcat-connectors-1.2.41-src/native

　　./configure --with-apxs=/usr/local/apache2.4/bin/apxs

　　make && make install

二、配置相應的文件

　　cat mod_jk.conf

　　LoadModule jk_module modules/mod_jk.so

　　JkWorkersFile conf/extra/workers.properties

　　JkLogFile logs/mod_jk.log

　　JkLogLevel debug

　　JkMount /* tomcat1

　　JkMount /status/ stat1

　　三、workers.properties

　　cat workers.properties

　　worker.list=tomcat1,stat1

　　worker.tomcat1.port=8009

　　worker.tomcat1.host=192.168.1.155

　　worker.tomcat1.type=ajp13

　　worker.tomcat1.lbfactor=1

　　worker.stat1.type = status

可是檢查語法時一直報錯：

[root@wadeson conf]# /usr/local/apache2.4/bin/httpd -t
AH00526: Syntax error on line 1 of /usr/local/apache2.4/conf/extra/workers.properties:
Invalid command 'worker.list=tomcat1,stat1', perhaps misspelled or defined by a module not included in the server configuration

httpd2.4編譯加載mod_jk模塊設置配置文件一直報錯，沒有找到相應的解決辦法

而後換成了centos7的yum安裝的httpd2.4以上版本，192.168.223.147

　　wget http://archive.apache.org/dist/tomcat/tomcat-connectors/jk/tomcat-connectors-1.2.41-src.tar.gz

　　cd tomcat-connectors-1.2.41-src/native

　　./configure --with-apxs=/usr/bin/apxs

　　make && make install

[root@wadeson conf.d]# cat mod_jk.conf
　　LoadModule jk_module modules/mod_jk.so
　　JkWorkersFile /etc/httpd/conf.d/workers.properties
　　JkLogFile logs/mod_jk.log
　　JkLogLevel debug
　　JkMount /* tomcat1 這裏的tomcat1要和後端tomcat的配置jvmRoute值相同<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">
　　JkMount /status/ stat1
[root@wadeson conf.d]# cat workers.properties
　　worker.list=tomcat1,stat1
　　worker.tomcat1.port=8010
　　worker.tomcat1.host=192.168.223.146
　　worker.tomcat1.type=ajp13
　　worker.tomcat1.lbfactor=1
　　worker.stat1.type = status

配置都是如出一轍，centos7自帶的httpd就沒有報錯，編譯安裝就一直報錯，因而採用centos7進行操做

基於模塊mod_jk的反向代理已經成功，因而進行負載均衡：

[root@wadeson conf.d]# cat workers.properties
　　worker.list=lbcluster1,stat1
　　worker.tomcat1.port=8010
　　worker.tomcat1.host=192.168.223.146
　　worker.tomcat1.type=ajp13
　　worker.tomcat1.lbfactor=1
　　worker.tomcat2.port=8011
　　worker.tomcat2.host=192.168.223.146
　　worker.tomcat2.type=ajp13
　　worker.tomcat2.lbfactor=1
　　worker.lbcluster1.type=lb
　　worker.lbcluster1.sticky_session=0
　　worker.lbcluster1.balance_workers = tomcat1,tomcat2
　　worker.stat1.type = status

訪問網站效果：

如今將負載均衡效果進行session會話綁定：

[root@wadeson conf.d]# cat workers.properties
　　worker.list=lbcluster1,stat1
　　worker.tomcat1.port=8010
　　worker.tomcat1.host=192.168.223.146
　　worker.tomcat1.type=ajp13
　　worker.tomcat1.lbfactor=1
　　worker.tomcat2.port=8011
　　worker.tomcat2.host=192.168.223.146
　　worker.tomcat2.type=ajp13
　　worker.tomcat2.lbfactor=1
　　worker.lbcluster1.type=lb
　　worker.lbcluster1.sticky_session=1 只需將這裏的值將0變爲1便可綁定session會話
　　worker.lbcluster1.balance_workers = tomcat1,tomcat2
　　worker.stat1.type = status

綜上，httpd在編譯安裝2.4結合mod_jk模塊遇到不可知的錯誤，更換centos7自帶的2.4以上版本的yum包成功解決該錯誤