5.6.1.1. 安装和配置负载均衡

这里介绍在 Ubuntu 14.04 上安装 Apache HTTP Server 作为负载均衡。

• 安装 Apache HTTP Server 和 mod_jk 模块：

$ sudo apt-get install apache2 libapache2-mod-jk

• 用以下内容替换 /etc/libapache2-mod-jk/workers.properties 文件内容：

workers.tomcat_home=
workers.java_home=
ps=/
worker.list=tomcat1,tomcat2,loadbalancer,jkstatus
worker.tomcat1.port=8009
worker.tomcat1.host=host1
worker.tomcat1.type=ajp13
worker.tomcat1.connection_pool_timeout=600
worker.tomcat1.lbfactor=1
worker.tomcat2.port=8009
worker.tomcat2.host=host2
worker.tomcat2.type=ajp13
worker.tomcat2.connection_pool_timeout=600
worker.tomcat2.lbfactor=1
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=tomcat1,tomcat2
worker.jkstatus.type=status

• 添加下面的这些内容到 /etc/apache2/sites-available/000-default.conf：

<VirtualHost *:80>
...
    <Location /jkmanager>
        JkMount jkstatus
        Order deny,allow
        Allow from all
    </Location>
    JkMount /jkmanager/* jkstatus
    JkMount /app loadbalancer
    JkMount /app/* loadbalancer
</VirtualHost>

• 重启 Apache HTTP 服务:

$ sudo service apache2 restart