Tomcat LB 负载均衡集群实现

红太狼 2022-05-22 04:22 218阅读 0赞

**Tomcat LB 负载均衡集群实现**

**主机说明：**

**Tomcat1：test.field.com/192.168.88.130**

**Tomcat2：web1.field.com/192.168.88.131**

**反向代理负载均衡器nginx：cen7.field.com/192.168.88.132**

**JDK包：jdk-8u151-linux-i586.tar.gz/jdk-8u151-linux-x64.rpm**

**Tomcat包：apache-tomcat-8.0.47.tar.gz**

**一、安装配置Tomcat1**

**1、安装jdk8**

\[root@www local\]\# tar -zxfjdk-8u151-linux-i586.tar.gz -C /usr/local

\[root@www local\]\# ln -sv  jdk1.8.0\_151 jdk8

"jdk8" ->"jdk1.8.0\_151"

\[root@www local\]\# ll

总用量 4

drwxr-xr-x. 8 uucp  143 4096 9月   6 2017 jdk1.8.0\_151

lrwxrwxrwx. 1 root root   12 6月  14 14:31 jdk8 -> jdk1.8.0\_151

**1）、配置环境变量**

\[root@www ~\]\# vim  /etc/profile.d/java.sh

\[root@www ~\]\# more  /etc/profile.d/java.sh

export JAVA\_HOME=/usr/local/jdk8

export PATH=$JAVA\_HOME/bin:$PATH

\[root@www ~\]\# .  /etc/profile.d/java.sh

\[root@www java\]\# java

\-bash: /usr/local/java/jdk8/bin/java:/lib/ld-linux.so.2: bad ELF interpreter: 没有那个文件或目录

此处报错：原因是解压安装jdk缺少glibc.i686，rpm包安装无此现象。

**\[root@www~\]\# yum  install  glibc.i686**

**2）、测试Java**

\[root@www ~\]\# java

用法: java \[-options\] class \[args...\]

(执行类)

**2、Tomcat包安装配置**

\[root@www ~\]\# tar  -zxf  apache-tomcat-8.0.47.tar.gz  -C  /usr/local

\[root@www ~\]\# cd  /usr/local/

\[root@www local\]\# ln -sv  apache-tomcat-8.0.47   tomcat

"tomcat" ->"apache-tomcat-8.0.47"

\[root@www local\]\# ll | grep tomcat

drwxr-xr-x. 9 root root      4096 11月 16 2017apache-tomcat-8.0.47

lrwxrwxrwx. 1 root root        20 11月 16 2017tomcat -> apache-tomcat-8.0.47

**1）、配置环境变量**

\[root@www local\]\# vim  /etc/profile.d/tomcat.sh

\[root@www local\]\# more  /etc/profile.d/tomcat.sh

export CATALINA\_HOME=/usr/local/tomcat

export PATH=$CATALINA\_HOME/bin:$PATH

\[root@field tomcat\]\# .  /etc/profile.d/tomcat.sh

\[root@www ~\]\# cd  /usr/local/tomcat/conf

\[root@www conf\]\# cp  server.xml\{,.backup\}

**2）、添加Tomcat实例**

\[root@www conf\]\# vi  server.xml

</Host>

<ValveclassName="org.apache.catalina.valves.RemoteAddrValve"

deny="192\\.168\\.88\\.139" />

</Context>

<ValveclassName="org.apache.catalina.valves.AccessLogValve"directory="/data/log"

prefix="web1\_access\_log" suffix=".txt"

pattern="%h %l %u %t "%r" %s %b" />

</Host>

**3）、创建目录及测试页：**

\[root@www ~\]\# mkdir  -pv  /data/webapps/ROOT/\{classes,lib,META-INF,WEB-INF\}

\[root@www ~\]\# cd  /data/webapps/ROOT/

\[root@www ROOT\]\# vim index.jsp

\[root@www ROOT\]\# more  index.jsp

<%@ page language="java" %>

<%@ page import="jave.util.\*"%>

<html>

<head>

</head>

<body>

<% out.println("Hello,Web1.");%>

</body>

</html>

\[root@www conf\]\# catalina.sh  configtest

Tomcat语法检查

\[root@www conf\]\# catalina.sh  stop

\[root@www conf\]\# catalina.sh  start

**4）、测试访问：成功**

\[root@test jdk1.8.0\_151\]\# curl  http://192.168.88.131:8080/index.jsp

<html>

<head>

</head>

<body>

Hello,Web1.

</body>

</html>

**二、安装配置Tomcat2**

**1、安装jdk8**

\[root@test ~\]\#  ll  jdk\*

\-rw-r--r--. 1 root root 192658627 11月 14 21:57 jdk-8u151-linux-i586.tar.gz

\-rw-r--r--. 1 root root 174163338 11月 16 20:21 jdk-8u151-linux-x64.rpm

\[root@test ~\]\# \# rpm  -ivh  jdk-8u151-linux-x64.rpm

\[root@test ~\]\# rpm  -ql jdk1.8

\[root@test ~\]\# cd  /usr/java/

\[root@field java\]\# ll

总用量 4

lrwxrwxrwx. 1 root root   16 11月 16 20:28 default-> /usr/java/latest

drwxr-xr-x. 9 root root 4096 11月 16 20:28jdk1.8.0\_151

lrwxrwxrwx. 1 root root   22 11月 16 20:28 latest-> /usr/java/jdk1.8.0\_151

**1）、修改环境变量**

\[root@test jdk1.8.0\_151\]\# vim  /etc/profile.d/java.sh

export JAVA\_HOME=/usr/java/latest

export PATH=$JAVA\_HOME/bin:$PATH

\[root@test jdk1.8.0\_151\]\# .  /etc/profile.d/java.sh

\[root@test ~\]\# java

用法: java \[-options\] class \[args...\]

(执行类)

**2、Tomcat包安装配置**

**tomcat2创建两个实例**

\[root@field ~\]\# tar  zxvfapache-tomcat-8.0.47.tar.gz  -C  /usr/local

\[root@field ~\]\# cd  /usr/local

\[root@field local\]\# ln  -sv  apache-tomcat-8.0.47  tomcat

"tomcat" ->"apache-tomcat-8.0.47"

\[root@field local\]\# ll  tomcat\*

lrwxrwxrwx. 1 root root        20 11月 16 20:50 tomcat-> apache-tomcat-8.0.47

drwxr-xr-x. 3 root root      4096 11月 15 12:07tomcat1

drwxr-xr-x. 3 root root      4096 11月 15 12:07tomcat2

**1）、配置环境变量**

\[root@field tomcat\]\# vim  /etc/profile.d/tomcat.sh

export CATALINA\_HOME=/usr/local/tomcat

export PATH=$CATALINA\_HOME/bin:$PATH

\[root@field tomcat\]\# .  /etc/profile.d/tomcat.sh

**2）、添加2个Tomcat实例**

</Host>

<ValveclassName="org.apache.catalina.valves.AccessLogValve"directory="/data/log"

prefix="test\_access\_log" suffix=".txt"

pattern="%h %l %u %t "%r" %s %b" />

</Host>

**3）、创建目录和测试页**

\[root@test webapps\]\# mkdir  -pv  /data/webapps/ROOT/\{classes,lib,META-INF,WEB-INF\}

\[root@test webapps\]\# mkdir  -pv  /data/webapps/app1/\{classes,lib,META-INF,WEB-INF\}

\[root@test app1\]\# more  index.jsp

<%@ page language="java" %>

<%@ page import="jave.util.\*"%>

<html>

<head>

<title>JSP Test Page ForApp1</title>

</head>

<body>

<% out.println("Hello, App1");%>

</body>

</html>

\[root@test app1\]\# more   ../ROOT/index.jsp

<%@ page language="java" %>

<%@ page import="jave.util.\*"%>

<html>

<head>

<title>JSP Test Page ForTest</title>

</head>

<body>

<% out.println("Hello,Test ");%>

</body>

</html>

\[root@test app1\]\# catalina.sh  configtest

\[root@test app1\]\# catalina.sh  stop

\[root@test app1\]\# catalina.sh  start

**4）、测试：成功**

\[root@www ROOT\]\# curl  test.field.com:8080/index.jsp

<html>

<head>

<title>JSP Test Page ForTest</title>

</head>

<body>

Hello,Test

</body>

</html>

\[root@www ROOT\]\# curl  test.field.com:8080/app1/index.jsp

<html>

<head>

<title>JSP Test Page ForApp1</title>

</head>

<body>

Hello,App1

</body>

</html>

**三、Centos7安装Nginx**

\[root@cen7 etc\]\# yum  -y  install nginx

**1）、配置反向代理和负载均衡**

\[root@cen7 nginx\]\# vim  nginx.conf

upstream  tomsrv \{

server  web1.field.com:8080;

server  test.field.com:8080;

server \{

listen       80  default\_server;

listen       \[::\]:80  default\_server;

server\_name  \_;

root         /usr/share/nginx/html;

\# Load configuration files for the default server block.

include /etc/nginx/default.d/\*.conf;

location /app1/ \{

proxy\_pass  http://test.field.com:8080/app1/index.jsp;

location / \{

root  /usr/share/nginx/html;

index index.html index.phpindex.htm;

location  ~\*  \\.(jsp|do)$  \{

proxy\_pass  http://tomsrv;

**    \}**

**2）、访问异常解决**

\[root@test conf\]\# curl  http://192.168.88.132/index.jsp

curl: (7) couldn't connect to host

\[root@test conf\]\#  curl  http://192.168.88.132

curl: (7) couldn't connect to host

\[root@cen7 etc\]\# curl localhost

curl: (7) Failed connectto localhost:80; 拒绝连接

核查原因为centos7默认开启了firewall，关闭即可

\[root@cen7 nginx\]\# firewall-cmd  --state

running

\[root@cen7 nginx\]\# firewall-cmd  --list-all

public (active)

target: default

icmp-block-inversion: no

interfaces: ens33

sources:

services: ssh dhcpv6-client

ports:

protocols:

masquerade: no

forward-ports:

source-ports:

icmp-blocks:

rich rules:

\[root@cen7 nginx\]\# systemctl  stop  firewalld

\[root@cen7 etc\]\# systemctl  stop  firewalld

**四、测试负载均衡和反向代理Tomcat集群**

**成功：**

\[root@test conf.d\]\# curl  http://192.168.88.132/index.jsp

<html>

<head>

</head>

<body>

Hello,Web1.

</body>

</html>

\[root@test conf.d\]\# curl  http://192.168.88.132/index.jsp

<html>

<head>

<title>JSP Test Page ForTest</title>

</head>

<body>

Hello,Test

</body>

</html>

\[root@test conf.d\]\# curl  http://192.168.88.132/app1/

<html>

<head>

<title>JSP Test Page ForApp1</title>

</head>

<body>

Hello, App1

</body>

</html>

Tomcat LB 负载均衡集群实现

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