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。

  1. 安装 Apache HTTP Server 和 mod_jk 模块：

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

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

    1. workers.tomcat_home=
    2. workers.java_home=
    3. ps=/
    5. worker.list=tomcat1,tomcat2,loadbalancer,jkstatus
    7. worker.tomcat1.port=8009
    8. worker.tomcat1.host=host1
    9. worker.tomcat1.type=ajp13
    10. worker.tomcat1.connection_pool_timeout=600
    11. worker.tomcat1.lbfactor=1
    13. worker.tomcat2.port=8009
    14. worker.tomcat2.host=host2
    15. worker.tomcat2.type=ajp13
    16. worker.tomcat2.connection_pool_timeout=600
    17. worker.tomcat2.lbfactor=1
    19. worker.loadbalancer.type=lb
    20. worker.loadbalancer.balance_workers=tomcat1,tomcat2
    22. worker.jkstatus.type=status

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

    1. <VirtualHost *:80>
    2. ...
    3.     <Location /jkmanager>
    4.         JkMount jkstatus
    5.         Order deny,allow
    6.         Allow from all
    7.     </Location>
    9.     JkMount /jkmanager/* jkstatus
    10.     JkMount /app loadbalancer
    11.     JkMount /app/* loadbalancer
    13. </VirtualHost>

  4. 重启 Apache HTTP 服务:

    $ sudo service apache2 restart