Nginx load scheduler + dual Tomcat load and session sharing + MySQL back-end database

This article mainly introduces the Nginx load scheduler dual Tomcat load and session sharing MySQL back-end database. It has a certain reference value. Now I share it with you. Friends in need can refer to it

Nginx Load scheduler dual Tomcat load and session replication MySQL backend database

Environment:

##IPFunction192.168.2.5nginx192.168.2.6tomcat1192.168.2.7tomcat2##192.168.2.81. Configuration before session sharing

mysql

Steps:

①Close the firewall or open ports 80, 8080, 3306, close selinux

②Install nginx

从nginx官网下载最新版
wget http://nginx.org/download/nginx-1.13.9.tar.gz

[root@192 ~]# yum -y install pcre-devel zlib-devel gcc gcc-c make

[root@192 ~]# useradd -M -s /sbin/nologin nginx

[root@192 ~]# tar zxf nginx-1.13.9.tar.gz -C /usr/src

[root@192 ~]# cd /usr/src/nginx-1.13 .9/

[root@192 nginx-1.13.9]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-http_stub_status_module && make && make install

[root@192 ~]# ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin

Do not start nginx

③Two tomcat hosts for installation

jdk从官网下载需要许可，允许之后下载至本地，导入主机
tomcat从官网downloads找到tomcat7.0或者更高版本
wget http://mirror.bit.edu.cn/apache/tomcat/tomcat-7/v7.0.86/bin/apache-tomcat-7.0.86.tar.gz

[root@192 ~]# tar zxf jdk-7u65-linux-x64.gz -C /usr/src

[root@192 ~]# tar zxf apache-tomcat-7.0.54.tar.gz -C /usr/src

[root@192 ~]# mv jdk1.7.0_65/ /usr/local/ java

[root@192 ~]# mv apache-tomcat-7.0.54/ /usr/local/tomcat7

[root@192 ~]# vim /etc/profile

export JAVA_HOME=/usr/local/java
export CATALINA_HOME=/usr/local/tomcat7
export PATH=$JAVA_HOME/bin:$CATALINA_HOME/bin:$PATH

[root@192 ~]# source /etc/profile

[root@192 ~]# java -version

java version "1.8.0_171"
Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)

[root@192 ~]# catalina.sh version

Using CATALINA_BASE:   /usr/local/tomcat7
Using CATALINA_HOME:   /usr/local/tomcat7
Using CATALINA_TMPDIR: /usr/local/tomcat7/temp
Using JRE_HOME:        /usr/local/java
Using CLASSPATH:       /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar
Server version: Apache Tomcat/7.0.
Server built:   May 19 2014 10:26:15
Server number:  7.0.86.0
OS Name:        Linux
OS Version:     3.10.0-327.el7.x86_64
Architecture:   amd64
JVM Version:    1.7.0_65-b17
JVM Vendor:     Oracle Corporation

Start tomcat

[root@192 ~]# /usr/local/tomcat7/bin/startup.sh

Using CATALINA_BASE:   /usr/local/tomcat7
Using CATALINA_HOME:   /usr/local/tomcat7
Using CATALINA_TMPDIR: /usr/local/tomcat7/temp
Using JRE_HOME:        /usr/local/java
Using CLASSPATH:       /usr/local/tomcat7/bin/bootstrap.jar:/usr/local/tomcat7/bin/tomcat-juli.jar
Tomcat started.

Test access

http:// 192.168.2.6:8080

http://192.168.2.7:8080

④Two hosts modify the tomcat configuration file

[root@192 ~]#cd /usr/local/tomcat7/conf

[root@192 ~]#cp server.xml server.xml.bak

[root@192 ~]#vim server.xml

.......
<engine>
<host>
        <context></context></host></engine>

[root@192 ~]#mkdir -p /web/webapp1

[root@192 ~]#vim /web/webapp1/index.jsp

 
<title>tomcat-1</title>
 

 <h1 id="font-Session-serviced-by-tomcat-font"><font>Session serviced by tomcat</font></h1>

                  

Session ID
Create on

Restart tomcat

[root@192 ~] #shutdown.sh

[root@192 ~]#startup.sh

Note: The second host is different in jvmRoute=”tomcat-2” in server.xml, and index.

Test access in jsp shows that the session IDs of the two tomcat hosts are different, and the preparations are completed

http://192.168.2.6 :8080

http://192.168.2.7:8008

2. Session sharing configuration

Steps:

①Configure session sharing cluster on two hosts

[root@192 ~]#vim /usr/local/tomcat7/conf/server.xml

.......
<engine>

      <!--For clustering, please take a look at documentation at:
          /docs/cluster-howto.html  (simple how to)
          /docs/config/cluster.html (reference documentation) -->
      <!--
      <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
      -->
      <cluster>

         <manager></manager>

         <channel ina.tribes.group.groupchannel>
            <membership></membership>
            <receiver></receiver>
            <sender>
              <transport></transport>
            </sender>
            <interceptor></interceptor>
            <interceptor></interceptor>
          </channel>

          <valve></valve>
          <valve></valve>

  <deployer></deployer>

  <clusterlistener></clusterlistener>
      <clusterlistener></clusterlistener>
    </cluster>
  <!-- Use the LockOutRealm to prevent attempts to guess user passwords
       via a brute-force attack -->
  <realm>
    <!-- This Realm uses the UserDatabase configured in the global JNDI
         resources under the key "UserDatabase".  Any edits
         that are performed against this UserDatabase are immediately
         available for use by the Realm.  -->
    <realm></realm>
  </realm>

  <host>
    <context></context></host></engine>

[root@192 ~]#mkdir /web/webapp1/WEB-INF

[ root@192 ~]#cp /usr/local/tomcat7/conf/web.xml WEB-INF/

[root@192 ~]#vim WEB-INF/web.xml

<web-app>
<distributable></distributable>  #添加这个单词，必须有这一步，否则用户的session没法使用</web-app>

If the firewall is enabled, enable the following

[root@192 ~]#firewall-cmd --add-port=45564/udp --permanent
[root@192 ~]#firewall-cmd --add-port=4000/tcp --permanent
[root@192 ~]#firewall-cmd --reload
Restart tomcat

[root@192 ~]#shutdown.sh

[root@192 ~]#startup.sh

Note: The two tomcat configurations are the same as long as The Receiver segment refers to the IP address of the second host

②Configure nginx

[root@192 ~]#vim /usr/local/nginx/conf/nginx.conf

.......
http { 
.......
upstream tomcat_server {
        server 192.168.2.6:8080 weight=1;
        server 192.168.2.7:8080 weight=1;
  }

    #gzip  on;

    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
            proxy_pass http://tomcat_server;
        }

Start nginx, visit the nginx address and refresh the page to test access

[root@192 ~]#nginx

http://192.168.2.5

3. Connection mysql database

Steps:

①The mysql container in 192.168.2.8 serves as the database server, configure mysql:

mysql>grant all privileges on

.
to javauser @'192.168.2.%' identified by '123.com';mysql> create database javatest

mysql>use javatest

mysql>create table testdata(id int not null auto_increment primary key,foo varchar(25),bar varchar(10));

mysql>insert into testdata(foo,bar) values('hello','123.com');

mysql>select * from testdata;

id1

②下载mysql-connector-java-5.1.22-bin.jar 复制到tomcat7/lib/目录下(两台tomcat都需要配置)
[root@192 ~]# cp mysql-connector-java-5.1.22-bin.jar /usr/local/tomcat7/lib/

③配置context.xml
[root@192 ~]# cp /usr/local/tomcat7/conf/context.xml /usr/local/tomcat7/conf/context.xml.bak

[root@192 ~]# vim /usr/local/tomcat7/conf/context.xml

<context>

    <!-- Default set of monitored resources -->
    <watchedresource>WEB-INF/web.xml</watchedresource>
    <resource></resource></context>

④配置web.xml
[root@192 ~]# vim /web/webapp1/web.xml

......
<distributable></distributable>
<description>MySQL Test App</description>
 <resource-ref>
    <description>DB Connection</description>
    <res-ref-name>jdbc/TestDB</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
 </resource-ref>

⑤编写连接数据库jsp文件
[root@192 ~]# vim /web/webapp1/test.jsp

  
    <title>MySQL</title>
  

connect MySQL<br>
foo:"+rs.getString(2)+"bar:"+rs.getString(3));
}
rs.close();
stmt.close();
conn.close();
%>

⑥重启tomcat，测试连接
[root@192 ~]# shutdown.sh
[root@192 ~]# startup.sh

http://192.168.2.5/test.jsp

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