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Lambda在线 > lzcxcz > Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

lzcxcz 2020-05-22

环境说明:

系统:Centos-7

主机:Centos-7 x3

服务器1(192.168.10.102/24)

服务器2(192.168.10.103/24)

服务器3(192.168.10.104/24)

源码安装包路径:/GZ/

安装路径:/usr/loval/

一、Tomcat安装部署:(全部服务器安装)

1、安装Tomcat,安装之前必须先安装Java,先安装java

  >1、解压安装java

[root@lzc GZ]# tar zxvf jdk-8u151-linux-x64.tar.gz

  >2、配置java

[root@lzc GZ]# mv jdk1.8.0_151/ /usr/local/java

[root@lzc GZ]# vim /etc/profile.d/java.sh

#写入

export JAVA_HOME=/usr/local/java

export PATH=$PATH:$JAVA_HOME/bin

#保存退出

  >3、导入环境变量,查看Java版本

[root@lzc GZ]# source/etc/profile.d/java.sh   #导入环境变量

[root@lzc GZ]# java -version  #查看JAVA版本

2、下载安装Tomcat(每台服务器配置Tomcat8080、Tomcat8081)

安装路径:/usr/local/Tomcat/

                            ├── Tomcat8080

├── Tomcat8081

  >1、下载解压Tomcat

[root@lzc GZ]# tarzxvf apache-tomcat-9.0.2.tar.gz

  >2、Tomcat安装路径

[root@lzc GZ]# mv apache-tomcat-9.0.2 /usr/local/Tomcat/Tomcat8080

[root@lzc GZ]# mv apache-tomcat-9.0.2 /usr/local/Tomcat/Tomcat8081

  >3、修改Tomcat端口号:(修改前先备份 cpserver.xml server.xml.bak)

/usr/local/Tomcat/Tomcat8081/conf

vim server.xml(把8005修改8006)

(8080修改8081)

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

#保存退出

>4、启动Tomcat

[root@lzc /]#/usr/local/Tomcat/Tomcat8080/bin/startup.sh

Using CATALINA_BASE:  /usr/local/Tomcat/Tomcat8080

Using CATALINA_HOME:  /usr/local/Tomcat/Tomcat8080

Using CATALINA_TMPDIR: /usr/local/Tomcat/Tomcat8080/temp

Using JRE_HOME:       /usr/local/java

Using CLASSPATH:      /usr/local/Tomcat/Tomcat8080/bin/bootstrap.jar:/usr/local/Tomcat/Tomcat8080/bin/tomcat-juli.jar

Tomcat started.

[root@lzc /]#/usr/local/Tomcat/Tomcat8081/bin/startup.sh

Using CATALINA_BASE:  /usr/local/Tomcat/Tomcat8081

Using CATALINA_HOME:  /usr/local/Tomcat/Tomcat8081

Using CATALINA_TMPDIR: /usr/local/Tomcat/Tomcat8081/temp

Using JRE_HOME:       /usr/local/java

Using CLASSPATH:      /usr/local/Tomcat/Tomcat8081/bin/bootstrap.jar:/usr/local/Tomcat/Tomcat8081/bin/tomcat-juli.jar

Tomcat started.

  >5、查看Tomcat端口

[root@lzc /]# netstat -ntpl | egrep ":8080|8081"

tcp6       0     0 :::8080                :::*                   LISTEN      16907/java         

tcp6       0     0 :::8081                :::*                    LISTEN      17430/java 

  >6、修改web页面为对应的服务器和端口号

路径:/usr/local/Tomcat/Tomcat8080/webapps/ROOT

[root@lzc ROOT]# pwd

/usr/local/Tomcat/Tomcat8080/webapps/ROOT

[root@lzc ROOT]# more index.jsp

<%@ page session="false"pageEncoding="UTF-8" contentType="text/html; charset=UTF-8"%>

<center><H1> 服务器:192.168.10.102<br>  Tomcat:8080</H1></center>

<hr>

[root@lzc ROOT]# pwd  #复制index.jsp到Tomcat8081

cp index.jsp /usr/local/Tomcat/Tomcat8081/webapps/ROOT/

/usr/local/Tomcat/Tomcat8081/webapps/ROOT

[root@lzc ROOT]# sed -i "s/8080/8081/g"index.jsp

[root@lzc ROOT]# more index.jsp

<%@ pagesession="false" pageEncoding="UTF-8"contentType="text/html; charset=UTF-8" %>

<center><H1>服务器:192.168.10.102<br>  Tomcat:8081</H1></center>

<hr>

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

 >8扩展内容Tomcat

启动Tomcat:

[root@lzc]# /usr/local/Tomcat/Tomcat8080/bin/startup.sh

[root@lzc]# /usr/local/Tomcat/Tomcat8081/bin/startup.sh

关闭Tomcat:

[root@lzc]# /usr/local/Tomcat/Tomcat8080/bin/shutdown.sh

[root@lzc]# /usr/local/Tomcat/Tomcat8081/bin/shutdown.sh

或者

[root@lzc]# ps -ef | grep Tomcat8080 |grep -v grep | awk '{print $2}' | xargs kill -9

shell脚本进程守护:

创建脚本:

[root@lzc shell]# more keeptomcat.sh

#!/bin/bash

#脚本功能每一分钟检测Tomcat进程是否存在

#如Tomcat进程不存在自动重启Tomcat

#Tomcat8080

netstat -ntpl | grep ":8080"

if [ $? -ne 0 ]

     then

     ps-ef | grep Tomcat8080 | grep -v grep | awk '{print $2}' | xargs kill -9

     sleep3

     /usr/local/Tomcat/Tomcat8080/bin/startup.sh

fi

 

#Tomcat8081

 

netstat -ntpl | grep ":8081"

if [ $? -ne 0 ]

     then

     ps-ef | grep Tomcat8081 | grep -v grep | awk '{print $2}'

     sleep5

     /usr/local/Tomcat/Tomcat8081/bin/startup.sh

fi

 

添加到定时任务:

[root@lzc shell]# crontab -l

*/1 * * * * /usr/bin/sh/shell/keeptomcat.sh

 

2、Nginx安装部署:

 1、 安装pcre

注:安装这个pcre库是为了让nginx支持HTTPRewrite模块

创建一个专用的软件工具目录(实际生产环境中一定要养成好的规范习惯)

下载pcre软件(Centos 6版本下载)

[root@lzc GZ]# wgetftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.38.tar.gz

编译安装

[root@lzc GZ]# tar -xvfpcre-8.38.tar.gz

[root@lzc GZ]# mv pcre-8.38 /usr/local/

[root@lzc GZ]# cd /usr/local/pcre-8.38

[root@lzc pcre-8.38]#  ./configure

[root@lzc pcre-8.38]#  make && make install

 

2、安装配置Nginx

>1、源码编译安装nginx

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

[root@lzc GZ]# wgethttp://nginx.org/download/nginx-1.10.1.tar.gz

[root@lzc GZ]# tar zxfnginx-1.10.1.tar.gz

[root@lzc GZ]# cd nginx-1.14.2/

[root@lzc GZ]# ./configure --user=nginx--group=nginx --prefix=/usr/local/nginx --with-http_stub_status_module  --with-pcre=/usr/local/pcre-8.38--without-http_gzip_module

[root@lzc GZ]# make && makeinstall

 

>2、配置启动nginx

[root@lzcGZ]# cd /usr/local/nginx/

[root@lzcnginx]# tree

├── conf   #nginx配置文件

   ├── fastcgi.conf

   ├── fastcgi.conf.default

   ├── fastcgi_params

   ├── fastcgi_params.default

   ├── koi-utf

   ├── koi-win

   ├── mime.types

   ├── mime.types.default

   ├── nginx.conf

   ├── nginx.conf.default

   ├── scgi_params

   ├── scgi_params.default

   ├── uwsgi_params

   ├── uwsgi_params.default

   └── win-utf

├── html   #web项目代码

   ├── 50x.html

   └── index.html

├── logs   #nginx日志

└── sbin   #nginx启动文件

└── nginx

 

 [root@lzc nginx]# ./sbin/nginx  #启动nginx

 [root@lzc nginx]# ps -ef | grep nginx    #查看nginx进程

root     37276      1  0 15:20 ?        00:00:00 nginx: master process./sbin/ngin

nginx    37277  37276  0 15:20 ?        00:00:00 nginx: worker process

root     37327  15908  0 15:22 pts/0    00:00:00 grep --color=auto nginx

[root@lzcnginx]# netstat -ntpl | grep ":80"   #查看nginx端口号

tcp        0     0 0.0.0.0:80             0.0.0.0:*               LISTEN      37276/nginx: master

 

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

>3、配置nginx反向代理

[root@lzc conf]# vim/usr/local/nginx/conf/nginx.conf   #添加以下内容

    #keepalive_timeout  0;

    keepalive_timeout  65;

###############################################

   upstream tomcat.lzc.com {   #定义主机池

   server 192.168.10.102:8080weight=1;#按权重的方式进行轮询、数值越大

   server 192.168.10.102:8081weight=1;

   server 192.168.10.103:8080weight=1;

   server 192.168.10.103:8081weight=1;

   server 192.168.10.104:8080weight=1;

    server 192.168.10.104:8081weight=1;

     }

###############################################

    #gzip on;

 

    server {

        listen       80;

        server_name  localhost;

 

        #charset koi8-r;

 

        #access_log  logs/host.access.log  main;

 

        location / {

             root   html;

            index  index.jsp index.html index.htm;

        }

#保存退出

[root@lzc nginx]# ps -ef | grep nginx |grep -v grep | awk '{print $2}' | xargs kill -9     #杀死nginx进程

[root@lzc nginx]# ./sbin/nginx   #启动nginx

 

Web页面正常访问到Tomcat项目

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

>4、扩展内容

关闭nginx:

[root@lzc nginx]# ps -ef | grep nginx |grep -v grep | awk '{print $2}' | xars kill -9

启动nginx:

[root@lzc /]#/usr/local/nginx/sbin/nginx

shell脚本进程守护:创建脚本

[root@lzcshell]# more keepNginx.sh

#!/bin/bash

#脚本功能检测nginx进程是否存在

#如nginx进程不存在自动重启nginx

 

netstat -ntpl | grep ":80" |grep nginx

if [ $? -ne 0 ]

     then

     ps-ef | grep nginx | grep -v grep | awk '{print $2}' | xargs kill -9

     sleep3

     cd/

     /usr/local/nginx/sbin/nginx

fi

 

添加到定时任务:每分钟执行一次

[root@lzcshell]# crontab -l

*/1* * * *  /usr/bin/sh/shell/keeptomcat.sh  &>/dev/null2>&1

*/1 * * * *  /usr/bin/sh /shell/keepNginx.sh  &>/dev/null 2>&1

 

 

3、Keepalived安装部署:

 

1、环境配置

 

2、yum安装keepablived

>1、环境说明:

>2、yum安装配置

[root@lzc /]# yum install openssl-develpopt* -y

[root@lzc /]# yum install -y keepalived

 

修改配置文件(主)

[root@lzc /]# tree /etc/keepalived/

/etc/keepalived/

├── keepalived.conf

[root@lzc /]# vim/etc/keepalived/keepalived.conf

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

修改配置文件(备)

[root@lzc /]# tree /etc/keepalived/

/etc/keepalived/

├── keepalived.conf

[root@lzc /]# vim/etc/keepalived/keepalived.conf

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

#保存退出

>3、启动keepalived

[root@lzc /]# systemctlenable keepalived.service  #加入启动项

[root@lzc /]# systemctlstart keepalived.service   #启动keepalived

[root@lzc /]# systemctl restartkeepalived.service#重启keepalived

[root@lzc /]# systemctl stopkeepalived.service    #停止keepalived

 

>4、验证和测试

Tomcat+nginx+Keepalived部署反向代理、负载均衡、高可用

#正常ping

 

模拟故障手动stop服务器1(192.168.10.102)的keepalived服务

[root@lzc /]# systemctl stopkeepalived

成功切换到服务器3(192.168.10.104)

由于服务器2服务器3优先级都是99,两者同等的优先级。


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