linux下apache负载均衡与jboss集群配置

一、安装并配置jdk

首先安装JDK，执行命令./ jdk-6u27-linux-x64.bin，JDK安装目录为当前指定目录或者是./jdk-6u33-linux-x64-rpm.bin,或者(如果是rpm格式)执行 rpm –ivh jdk-6u33-linux-amd64.rpm 默认安装目录为/usr/java这个目录下面

设置环境变量

vi /etc/profile 文件在最后加入

JAVA_HOME=/usr/java/jdk1.6.0_19

PATH=$JAVA_HOME/bin:$PATH

CLASSPATH=.:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar

export PATH JAVA_HOME CLASSPATH

二、安装并配置jboss环境变量

1 下载JBoss(JBoss5或以上版本)

2 安装JBoss

解压到usr目录下建个文件夹(我的放到jboss目录下)即可

3 配置JBoss环境变量

找到/etc/profile文件打开在最后面加入:

JBOSS_HOME=/usr/jboss/jboss-5.1.0.GA

PATH=$JBOSS_HOME/bin:$PATH

export JBOSS_HOME PATH

三、Jboss集群负载均衡器配置

1.安装apache

1)下载apache (httpd-2.2.17.tar.gz)

2)解压 (使用tar -zxvf命令)

3) 编译

打开解压获得的文件夹然后在空白处打开终端输入:

./configure

然后依次输入:

make clean

make

make install

4) 修改配置。

//本例中，提供服务的监听端口是7070，请根据实际情况修改。

打开 /usr/local/apache2/conf/httpd.conf文件

将Listen 80 改成Listen 7070

将User daemon和Group daemon 改为 User apache和Group apache

删除ServerName前的# 将该行改为 ServerName 127.0.0.1:8888

然后添加用户和用户组

在终端输入:

groupadd apache

useradd apache –g apache

2.apache mod_jk的配置

1) 下载mod_jk，将其改名为mod_jk.so，拷贝到/usr/local/apache2/modules下

然后打开终端输入:

chmod +x /usr/local/apache2/modules/mod_jk.so //相应的安装权限

2) 在 /usr/local/apache2/conf/httpd.conf 的末尾增加:

Include conf/mod_jk.conf

3) 建立空文件

/usr/local/apache2/conf/uriworkermap.properties

并在该目录下建立文件mod_jk.conf并输入以下内容：

_____________________________________________________________________

# Load mod_jk module

# Specify the filename of the mod_jk lib

LoadModule jk_module modules/mod_jk.so

# Where to find workers.properties

JkWorkersFile conf/workers.properties

# Where to put jk logs

JkLogFile logs/mod_jk.log

# Set the jk log level [debug/error/info]

JkLogLevel info

# Select the log format

JkLogStampFormat “[%a %b %d %H:%M:%S %Y]”

# JkOptions indicates to send SSK KEY SIZE

JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories

# JkRequestLogFormat

JkRequestLogFormat “%w %V %T”

# Mount your applications

JkMount /* loadbalancer

# You can use external file for mount points.

# It will be checked for updates each 60 seconds.

# The format of the file is: /url=worker

# /examples/*=loadbalancer

JkMountFile conf/uriworkermap.properties

# Add shared memory.

# This directive is present with 1.2.10 and

# later versions of mod_jk, and is needed for

# for load balancing to work properly

JkShmFile logs/jk.shm

# Add jkstatus for managing runtime data

<Location /jkstatus/>

JkMount status

Order deny,allow

Deny from all

Allow from 127.0.0.1

</Location>

保存

在该目录下建立文件workers.properties并输入以下内容:

_______________________________________________

# Define list of workers that will be used

# for mapping requests

worker.list=loadbalancer,status

# Define Node1

# modify the host as your host IP or DNS name.

worker.node1.port=8009

worker.node1.host=192.168.0.105

worker.node1.type=ajp13

worker.node1.lbfactor=1

# Define Node2

# modify the host as your host IP or DNS name.

worker.node2.port=8009

worker.node2.host= 192.168.0.100

worker.node2.type=ajp13

worker.node2.lbfactor=0

# Define Node3

# modify the host as your host IP or DNS name.

worker.node3.port=8009

worker.node3.host= 192.168. 0.110

worker.node3.type=ajp13

worker.node3.lbfactor=1

# Load-balancing behaviour

worker.loadbalancer.type=lb

worker.loadbalancer.balance_workers=node1,node2,node3

worker.loadbalancer.sticky_session=1

#worker.list=loadbalancer

# Status worker for managing load balancer

worker.status.type=status

说明:

worker.node1.host、worker.node2.host和worker.node3.host要改成jboss集群各机器的实际IP.

如果有更多的节点,顺序定义更多的node段,并在worker.loadbalancer.balance_workers后全部列出.

lbfactor是负载分配权重,值越大分配的负载越多.

3.JBoss集群节点配置

打开JBoss目录下/usr/local/jboss/server/all/deploy/jboss-web.sar/server.xml和

/usr/local/jboss/server/default/deploy/jboss-web.sar/server.xml

找到 <Connector port="8080" address="${0.0.0.0}" （如有外部不可以通过web浏览器访问jboss，则要改成0.0.0.0）

找到 <Engine name="jboss.web" defaultHost="localhost" 添加：jvmRoute="nodeX" >

注意,jvmRoute是节点号，要与在apache的workers.properties中的定义相对应.

四、 启动JBoss集群

1. 启动负载均衡器apache

在/usr/local/apache2/bin目录下执行./httpd –k start (终止命令： ./httpd –k stop)

在/usr/local/apache2/logs/mod_jk.log中，看到apache初始化mod_jk的日志:

[Wed Aug 01 10:36:11 2007][6636:63168] [info] init_jk::mod_jk.c (2743): mod_jk/1.2.23 initialized

[Wed Aug 01 10:36:11 2007][6637:63168] [info] init_jk::mod_jk.c (2743): mod_jk/1.2.23 initialized

后面如有错误信息，是因为集群中的节点尚未启动，暂时忽略。

用netstat检查7070监听端口存在,apache启动成功. (netstat -an | grep 7070)

2. 启动JBoss节点

在集群各机器的/usr/local/jboss/bin,分别执行./run.sh –b 192.168.0.100 //为节点的IP地址 (终止命令：./shutdown.sh –S)

用netstat检查8080端口监听存在.

用浏览器访问各节点的8080端口,能够看到jboss的状态.

Jboss启动成功.