安装Apache
以下是httpd 2.2的安装步骤（如使用httpd 2.4，请参考Linux下安装Apache HTTP Server 2.4）：
1. 安装
下载解压后进入httpd的根目录，依次执行如下命令： # ./configure --prefix=PREFIX --enable-so --enable-mods-shared=most --enable-ssl
# make
# make install
安装完毕后可执行以下命令启动apache：
$ PREFIX/bin/apachectl start
注意：PREFIX要替换为Apache的安装目录，如/usr/local/apache2.2
2. 配置为service
将apachectl拷贝到init.d
# cp apachectl /etc/init.d/httpd
# chkconfig --add httpd
# chkconfig httpd on
# service httpd start
安装mod_jk
下载mod_jk, 解压后进入native目录，执行如下命令：
./configure --with-apxs=/usr/local/apache2.2/bin/apxs
make
编译成功后，进入native/apache-2.0目录，将mod_jk.so拷贝到Apache的modules目录下。
配置mod_jk
在Apache的conf目录中创建三个文件：mod-jk.conf、workers.properties、uriworkermap.properties，内容如下：
mod-jk.conf
# Load mod_jk module
# Update this path to match your modules location
LoadModule jk_module modules/mod_jk.so
# Declare the module for
#AddModule mod_jk.c
# Where to find workers.properties
# Update this path to match your conf directory location (put workers.properties next to httpd.conf)
JkWorkersFile conf/workers.properties
# Where to put jk logs
# Update this path to match your logs directory location (put mod_jk.log next to access_log)
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 indicate to send SSL KEY SIZE,
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
# JkRequestLogFormat set the request format
JkRequestLogFormat "%w %V %T"
# 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
# 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 jkstatus for managing runtime data
JkMount status
Order deny,allow
Deny from all
Allow from 127.0.0.1
workers.properties
# 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.reference=worker.template
worker.node1.host=192.168.50.1
worker.node1.port=8009
worker.node1.lbfactor=1
# Define Node2
# modify the host as your host IP or DNS name.
worker.node2.reference=worker.template
worker.node2.host=192.168.50.2
worker.node2.port=8009
worker.node2.lbfactor=2
worker.template.type=ajp13
worker.template.socket_connect_timeout=5000
worker.template.socket_keepalive=true
worker.template.connection_pool_minsize=0
worker.template.connection_pool_timeout=600
worker.template.ping_mode=A
# Load-balancing behaviour
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=node1,node2
worker.loadbalancer.sticky_session=true
# Status worker for managing load balancer
worker.status.type=status
uriworkermap.properties
/signac-web|/*=loadbalancer
#
# Mount jkstatus to /jkmanager
# For production servers you will need to
# secure the access to the /jkmanager url
#
/jkstatus=status
最后在httpd.conf文件中添加：
Include conf/mod-jk.conf
配置EAP
mod_jk使用AJP协议进行通讯，需在web subsystem中配置 ajp connector;
另外需配置jvmRoute，如未配置sticky_session是不起作用的。在EAP6中需添加属性instance-id="node1"(名称要与workers.properties中一致)，如下：
....
绑定ajp端口
...
....
测试
测试页面：
jkstatus: http://127.0.0.1/jkstatus
signac-web: http://127.0.0.1/signac-web
附录
1. 如使用YUM安装apache，需执行
yum install httpd
yum install httpd-devel
httpd-devel中包含apxs。
2. 安装apache, 执行./configure命令时，输出：
checking whether to enable mod_deflate... configure: error: mod_deflate has been requested but can not be built due to prerequisite failures
原因是没有安装zlib包。centos下可执行yum install zlib-devel, ubuntu下可执行apt-get install zlib1g-dev来安装。
3. 启用ssl
yum install mod_ssl openssl
4. 升级openssl时注意使用--shared，否则可能会提示版本冲突
./config --prefix=/usr --shared