tomcat集群 - 走看看

zoukankan html css js c++ java

tomcat集群
tomcat集群

httpd负载均衡
httpd -M
确保有proxy_balancer_modeule模块
编辑httpd.conf
注释DocumentRoot
编辑conf.d/mod_httpd.conf
定义虚拟主机
两种方式都能实现负载均衡：
- 基于mod_proxy模块实现负载均衡
- 基于mod_jk模块实现负载均衡
下面我们就来分别演示一下，
1.基于mod_proxy实现负载均衡
定义虚拟主机
编辑conf.d/mod_httpd.conf
也就是在/etc/httpd/conf.d此目录下创建mod_httpd.conf
定义虚拟主机
1. NameVirtualHost *:80
2. <Proxy balancer://tomsrvs>
3. BalancerMember http://172.16.21.15:80 loadfactor=1
4. BalancerMember http://172.16.21.16:80 loadfactor=1
5. ProxySet lbmethod=byrequests
6. </Proxy>
7. <VirtualHost *:80>
8. ServerName node17.stu21.com
9. ProxyVia On
10. ProxyRequests Off
11. ProxyPreserveHost On
12. <Proxy *>
13. Order deny,allow
14. Allow from all
15. </Proxy>
16. Proxypass /status !
17. ProxyPass / balancer://tomsrvs/
18. ProxyPassReverse / balancer://tomsrvs/
19. <Location />
20. Order deny,allow
21. Allow from all
22. </Location>
23. </VirtualHost>
好了，大家可以看到基于mod_proxy模块的tomcat负载均衡配置完成。下面我们来配置一下基于mod_jk的模块的负载均衡！

#关闭httpd
2.#mod_jk负载均衡
#安装httpd-devel
[root@node17 ~]# yum intsall httpd-devel
#安装tomcat-connectors
[root@node17 native]# pwd
/root/tomcat-connectors-1.2.40-src/native
[root@node17 native]# ./configure --with-apxs=`which apxs`
[root@node17 native]make && make install

/etc/httpd/conf.d此目录下
编辑workers.properties
[root@node17 conf.d]# vim workers.properties
1. worker.list=tomsrvs,statA
2. worker.TomcatA.type=ajp13
3. worker.TomcatA.host=172.16.21.15
4. worker.TomcatA.port=8009
5. worker.TomcatA.lbfactor=5
6. worker.TomcatB.type=ajp13
7. worker.TomcatB.host=172.16.21.16
8. worker.TomcatB.port=8009
9. worker.TomcatB.lbfactor=5
10. worker.tomsrvs.type=lb
11. worker.tomsrvs.sticky_session=0
12. worker.tomsrvs.balance_workers=TomcatA,TomcatB
13. worker.statA.type=status
14. ~
/etc/httpd/conf.d此目录下
编辑mod_jk.conf
1. LoadModule jk_module modules/mod_jk.so
2. JkWorkersFile /etc/httpd/conf.d/workers.properties
3. JkLogFile logs/mod_jk.log
4. JkLogLevel debug
5. JkMount /* tomsrvs
6. JkMount /jkstatus/ statA
绑定session
编辑worker.propries，修改如下项
1. worker.tomsrvs.sticky_session=1
此外还得把模块mod_proxy 的配置文件mod_httpd.conf 改下
# mv mod_httpd.conf mod_httpd.conf.bak
分别编辑node15、node16节点server.xml，分别修改如下项，第一行是节点1，第二行是节点2
1. <Engine name="Catalina" defaultHost="node15.stu21.com" jvmRoute="tomcatA">
2. <Engine name="Catalina" defaultHost="node16.stu21.com" jvmRoute="tomcatB">
上面创建的两个文件配置设置好以后，接下来是基于 mod_jk模块开启后端2个节点的tomcat

访问节点3 ，会话已经绑定

好了，到这里我们状态信息查看就到这里了，下面我们来配置会话共享集群。

.DeltaManager具体实现过程
(1).修改server.xml配置文件

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8">
<Manager className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService"
address="228.0.0.4" port="45564" frequency="500" dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="192.168.18.201" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/>
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter="/"/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/>
<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>
以上内容定义在Engine容器中，则表示对所有主机均启动用集群功能。如果定义在某Host中，则表示仅对此主机启用集群功能。（注，节点node15与node16的tomcat的配置文件都要修改！）
如下是具体的配置：

节点node15:
[root@node15 ~]# vim /usr/local/tomcat/conf/server.xml
#在Engine组件内增加下面这一段
<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8">
<Manager className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService"
address="228.110.100.10" port="45564" frequency="500" dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="172.16.21.15" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/>
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter="/"/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/>
<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

节点node16:
[root@node16 ~]# vim /usr/local/tomcat/conf/server.xml

<Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster" channelSendOptions="8">
<Manager className="org.apache.catalina.ha.session.DeltaManager"
expireSessionsOnShutdown="false"
notifyListenersOnReplication="true"/>
<Channel className="org.apache.catalina.tribes.group.GroupChannel">
<Membership className="org.apache.catalina.tribes.membership.McastService"
address="228.110.100.10" port="45564" frequency="500" dropTime="3000"/>
<Receiver className="org.apache.catalina.tribes.transport.nio.NioReceiver"
address="172.16.21.16" port="4000" autoBind="100" selectorTimeout="5000" maxThreads="6"/>
<Sender className="org.apache.catalina.tribes.transport.ReplicationTransmitter">
<Transport className="org.apache.catalina.tribes.transport.nio.PooledParallelSender"/>
</Sender>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector"/>
<Interceptor className="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor"/>
</Channel>
<Valve className="org.apache.catalina.ha.tcp.ReplicationValve" filter="/"/>
<Valve className="org.apache.catalina.ha.session.JvmRouteBinderValve"/>
<Deployer className="org.apache.catalina.ha.deploy.FarmWarDeployer" tempDir="/tmp/war-temp/"
deployDir="/tmp/war-deploy/" watchDir="/tmp/war-listen/" watchEnabled="false"/>
<ClusterListener className="org.apache.catalina.ha.session.JvmRouteSessionIDBinderListener"/>
<ClusterListener className="org.apache.catalina.ha.session.ClusterSessionListener"/>
</Cluster>

此外，所有启用集群功能的web应用程序，其web.xml中都须添加<distributable/>才能实现集群功能。如果某web应用程序没有自己的web.xml，也可以通过复制默认的web.xml至其WEB-INF目录中实现。
(2).修改web.xml
node15:
[root@node15 ~]# cd /webapps/ROOT/
[root@node15 ROOT]# ls
index.jsp
[root@node15 ROOT]# mkdir WEB-INF
[root@node15 ROOT]# # ls
index.jsp WEB-INF
[root@node15 ROOT]# # cp /usr/local/tomcat/conf/web.xml WEB-INF/
[root@node15 ~]# vim /usr/local/tomcat/conf/web.xml

#增加一行<distributable/>

node16:
[root@node16 ~]# cd /webapps/ROOT/
[root@node16 ROOT]# ls
index.jsp
[root@node16 ROOT]# mkdir WEB-INF
[root@node16 ROOT]# # ls
index.jsp WEB-INF
[root@node16 ROOT]# # cp /usr/local/tomcat/conf/web.xml WEB-INF/
[root@node16 ~]# vim /usr/local/tomcat/conf/web.xml

#增加一行<distributable/>

(3).启动tomcat服务器
node15:
[root@node15 ~]# catalina.sh start
node16:
[root@node16 ~]# catalina.sh start

(4).查看一下tomcat集群日志
[root@node15 ~]#tail -f /usr/local/tomcat/logs/catalina.xxxx-xx-xx.log

最后我是基于mod_jk模块实现负载均衡的apache(步骤前面已经实现)

Nginx实现Tomcat负载均衡：

安装nginx
[root@node17 ~]# yum install -y nginx
[root@node17 ~]# vim /etc/nginx/conf.d/default.conf
配置nginx负载均衡
#
# The default server
#
upstream tomcat {
  server 192.168.18.201;
  server 192.168.18.202;
}
server {
  listen    80 default_server;
  server_name _;
  #charset koi8-r;
  #access_log logs/host.access.log main;
  location / {
    #root /usr/share/nginx/html;
    #index index.html index.htm;
    proxy_pass http://tomcat;
  }
  error_page 404       /404.html;
  location = /404.html {
    root /usr/share/nginx/html;
  }
  # redirect server error pages to the static page /50x.html
  #
  error_page 500 502 503 504 /50x.html;
  location = /50x.html {
    root /usr/share/nginx/html;
  }
  # proxy the PHP scripts to Apache listening on 127.0.0.1:80
  #
  #location ~ .php$ {
  # proxy_pass http://127.0.0.1;
  #}
  # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
  #
  #location ~ .php$ {
  # root      html;
  # fastcgi_pass 127.0.0.1:9000;
  # fastcgi_index index.php;
  # fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
  # include    fastcgi_params;
  #}
  # deny access to .htaccess files, if Apache's document root
  # concurs with nginx's one
  #
  #location ~ /.ht {
  # deny all;
  #}
}

检查配置文件并启动服务器
[root@node17 ~]# nginx –t

[root@node17 ~]# service nginx start

好了，到这里Nginx实现tomcat的负载均衡与会话共享配置完成。
查看全文

相关阅读:
WebService优点和缺点小结
 MongoDB监控之一：运行状态、性能监控，分析
 MongoDB分析工具之三：db.currentOp()
Linux NFS服务器的安装与配置
 第三方支付转
 视频监控/存储系统设计要点
 ViewPager禁止滑动以及它与内层滑动控件水平方向上事件冲突的解决方法
 （五）unity4.6Ugui中文教程文档-------概要-UGUI Interaction Components
ListView列表拖拽排序
 shell脚本编写汇集

原文地址：https://www.cnblogs.com/na2po2lun/p/4271011.html