Nginx+Tomcat+Keepalived实现高可用web集群

Java(TM) SE Runtime Environment (build 1.8.0_171-b11) Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode) 2、安装JDK 官网下载二进制包 解压到/usr/local/java tar zxvf jdk-8u171-linux-x64.tar.gz -C /usr/local/java/ 修改环境变量/etc/profile JAVA_HOME=/usr/local/java PATH=$JAVA_HOME/bin:$PATH CLASSPATH=$JAVA_HOME/jre/lib/ext:$JAVA_HOME/lib/tools.jar export PATH JAVA_HOME CLASSPATH 使环境变量生效： source /etc/profile 3、下载Tomcat源码包： wget -O /opt/apache-tomcat-9.0.7.tar.gz http://mirrors.hust.edu.cn/apache/tomcat/tomcat-9/v9.0.7/bin/apache-tomcat-9.0.7.tar.gz 4、解压到/usr/local/tomcat tar zxvf /opt/apache-tomcat-9.0.7.tar.gz -C /usr/local/ 5、修改Tomcat的主页 rm -rf /usr/local/apache-tomcat-9.0.7/webapps/ROOT/* echo "Tomcat1" /usr/local/apache-tomcat-9.0.7/webapps/ROOT/index.html #Tomcat1 echo "Tomcat2" /usr/local/apache-tomcat-9.0.7/webapps/ROOT/index.html #Tomcat2 6、测试Tomcat能否正常启动 [root@Tomcat1 bin]# ./usr/local/apache-tomcat-9.0.7/bin /startup.sh Using CATALINA_BASE: /usr/local/apache-tomcat-9.0.7 Using CATALINA_HOME: /usr/local/apache-tomcat-9.0.7 Using CATALINA_TMPDIR: /usr/local/apache-tomcat-9.0.7/temp Using JRE_HOME: /usr/local/java Using CLASSPATH: /usr/local/apache-tomcat-9.0.7/bin/bootstrap.jar:/usr/local/apache-tomcat-9.0.7/bin/tomcat-juli.jar Tomcat started. curl 10.10.10.130:8080 #返回Tomcat1 curl 10.10.10.131:8080 #返回Tomcat2 至此web端配置完成。 二、Nginx反向代理安装

1、安装依赖软件

 yum install -y gcc gcc-c++

 yum install -y pcre pcre-devel openssl openssl-devel zlib zlib-devel

2、官网下载源码包

3、解压源码包

 tar zxvf nginx-1.14.0.tar.gz -C /tmp/

4、编译安装

 useradd -s /bin/false -M nginx

 ./configure --user=nginx --group=nginx --prefix=/usr/local/nginx-1.14.0/ --with-http_v2_module --with-http_ssl_module --with-http_sub_module --with-http_stub_status_module --with-http_gzip_static_module --with-pcre

 make make install

5、配置反向代理/usr/local/nginx/conf/nginx.conf

worker_processes 1;

pid /usr/local/nginx/logs/nginx.pid;

worker_rlimit_nofile 51200;

events {

 use epoll;

 worker_connections 51200;

http {

 include mime.types;

 default_type application/octet-stream;

 server_names_hash_bucket_size 128;

 client_header_buffer_size 32k;

 large_client_header_buffers 4 32k;

 client_max_body_size 8m;

 sendfile on;

 tcp_nopush on;

 keepalive_timeout 65;

 tcp_nodelay on;

 gzip on;

 gzip_min_length 1k;

 gzip_buffers 4 16k;

 gzip_http_version 1.0;

 gzip_comp_level 2;

 gzip_types test/plain application/x-javascript test/css application/xml;

 gzip_vary on; 

 upstream backend {

 server 10.10.10.130:8080;

 server 10.10.10.131:8080;

 server {

 listen 80;

 server_name 10.10.10.128; #Nginx2改为：10.10.10.129

 location / { 

 root /var/www/html;

 index index.php index.html index.htm;

 proxy_pass http://backend;

先测试再启动：

[root@Nginx1 ~]# /usr/local/nginx-1.14.0/sbin/nginx -t

nginx: the configuration file /usr/local/nginx-1.14.0//conf/nginx.conf syntax is ok

nginx: configuration file /usr/local/nginx-1.14.0//conf/nginx.conf test is successful

[root@Nginx1 ~]# /usr/local/nginx-1.14.0/sbin/nginx

[root@Nginx1 ~]# lsof -i:80

COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME

nginx 4896 root 6u IPv4 18439 0t0 TCP *:http (LISTEN)

nginx 4897 nginx 6u IPv4 18439 0t0 TCP *:http (LISTEN)

curl 10.10.10.128 #轮询返回Tomcat1 Tomcat2

Nginx2同样的搭建。

至此Nginx反向代理搭建完成。

三、使用Keepalived实现高可用

1、安装：

 yum install keepalived -y

2、修改配置文件/etc/keepalived/keepalived.conf

MASTER 端：

! Configuration File for keepalived

vrrp_script check_nginx {

 script "/etc/keepalived/check_nginx.sh"

 interval 2

 weight 2

global_defs {

 notification_email {

 acassen@firewall.loc

 failover@firewall.loc

 sysadmin@firewall.loc

 notification_email_from Alexandre.Cassen@firewall.loc

 smtp_server 192.168.200.1

 smtp_connect_timeout 30

 router_id LVS_DEVEL1

vrrp_instance VI_1 {

 state MASTER

 interface eth0

 virtual_router_id 51

 priority 100

 advert_int 1

 authentication {

 auth_type PASS

 auth_pass 1111

 virtual_ipaddress {

 10.10.10.100/24 dev eth0

 track_script {

 check_nginx

BACKUP端：

router_id LVS_DEVEL2

state BACKUP

priority 90

检测Nginx脚本：

#!/bin/bash

nginxpid=`ps -C nginx --no-header | wc -l`

if [ $nginxpid -eq 0 ];then

 /etc/init.d/keepalived stop

chmod +x /etc/keepalived/check_nginx.sh

重启Keepalived服务

service keepalived restart

四、检验服务的高可用

Nginx1执行：killall nginx

发现 web访问依然正常

Tomcat1执行：/usr/local/apache-tomcat-9.0.7/bin/shutdown.sh

发现 web访问依然正常

高可用的环境搭建完毕。

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/54283.html

apachejavaKeepalivedlinuxLVSnginxphpTomcat