Redis+Tomcat+Nginx实现session共享、负载均衡

tyxiayu

　　环境（所有软件统一放到/root/下）
nginx：192.168.154.142；nginx-1.14.0.tar.gz
redis：192.168.154.143；redis-4.0.10.tar.gz
tomcat1：192.168.154.137；jdk-8u171-linux-x64.tar.gz,apache-tomcat-7.0.86.tar.gz
tomcat2：192.168.154.138；jdk-8u171-linux-x64.tar.gz,apache-tomcat-7.0.86.tar.gz
mysql：192.168.154.139　　拓扑图
　　
http://s1.运维网.com/images/20180908/1536396066703888.png
　　nginx
yum -y install gcc gcc-c++ make libtool zlib zlib-devel pcre pcre-devel openssl openssl-devel
groupadd -r www
useradd -r -g www -s /sbin/nologin www
tar zxf nginx-1.14.0.tar.gz
cd nginx-1.14.0/
./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_stub_status_module --with-http_realip_module --with-http_ssl_module --with-http_gzip_static_module --with-pcre --with-http_flv_module
make && make install
ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin/　　vi /usr/local/nginx/conf/nginx.conf
user www www;
worker_processes 4;
worker_cpu_affinity 0001 0010 0100 1000;
error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
worker_rlimit_nofile 10240;
pid logs/nginx.pid;
events {
use epoll;
worker_connections 4096;
}
http {
include mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request"'
'$status $body_bytes_sent "$http_referer"'
'"$http_user_agent" "$http_x_forwarded_for"';
access_log logs/access.log main;
server_tokens off;
sendfile on;
tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#Compression Settings
gzip on;
gzip_comp_level 6;
gzip_http_version 1.1;
gzip_proxied any;
gzip_min_length 1k;
gzip_buffers 16 8k;
gzip_types text/plain text/css text/javascript application/json application/javascript application/x-javascript application/xml;
gzip_vary on;
#end gzip
# http_proxy Settings
client_max_body_size 10m;
client_body_buffer_size 128k;
proxy_connect_timeout 75;
proxy_send_timeout 75;
proxy_read_timeout 75;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
#load balance Settings
upstream backend_tomcat {
server 192.168.154.137:8080 weight=1 max_fails=2 fail_timeout=10s;
server 192.168.154.138:8080 weight=1 max_fails=2 fail_timeout=10s;
}
#virtual host Settings
server {
listen 80;
server_name www.benet.com;
charset utf-8;
location / {
root html;
index index.jsp index.html index.htm;
}
location ~* \.(jsp|do)$ {
proxy_pass http://backend_tomcat;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
}
location /nginx_status {
stub_status on;
access_log off;
allow 192.168.154.0/24;
deny all;
}
}
}　　起nginx服务，防火墙放端口
nginx -t
#没有报错继续
nginx
firewall-cmd --add-port=80/tcp --permanent
firewall-cmd --reload　　验证1，实现nginx静态web页面访问
　　http://192.168.154.142
　　 http://s1.运维网.com/images/20180908/1536397581933479.png
　　tomcat（两台配置一样，注意只要是文档里写的tomcat配置，两台都需要做）
tar zxf jdk-8u171-linux-x64.tar.gz
tar zxf apache-tomcat-7.0.86.tar.gz
mv jdk1.8.0_171/ /usr/local/java
mv apache-tomcat-7.0.86 /usr/local/tomcat7　　vi /etc/profile（在最后面加上）

export JAVA_HOME=/usr/local/java
export CATALINA_HOME=/usr/local/tomcat7
export PATH=$JAVA_HOME/bin:$CATALINA_HOME/bin:$PATH　　测试java1.8和tomcat7环境。

http://s1.运维网.com/images/20180908/1536398069758225.png

　　起tomcat服务，放行8080端口

catalina.sh start
firewall-cmd --add-port=8080/tcp --permanent
firewall-cmd --reload　　验证2，实现tomcat7jsp页面访问
　　192.168.154.137
　　http://s1.运维网.com/images/20180908/1536398521268454.png
　　192.168.154.138
　　http://s1.运维网.com/images/20180908/1536398594998068.png
　　验证3、nginx的负载均衡
　　vim /usr/local/tomcat7/conf/server.xml（添加一行）

http://s1.运维网.com/images/20180908/1536398792232928.png

mkdir -p /web/webapp1
cat > /web/webapp1/index.jsp  create database javatest;
mysql> use javatest;
mysql> create table testdata(id int not null auto_increment primary key,foo varchar(25),bar int);
mysql> insert into testdata(foo,bar) values ('hello','123456'),('ok','654321');
mysql> grant all on *.* to javauser@'192.168.154.%' identified by 'javapasswd';firewall-cmd –-permanent –add-port=3306/tcp
firewall-cmd --reload　　tomcat7上
mv mysql-connector-java-5.1.22-bin.jar /usr/local/tomcat7/lib　　vim /usr/local/tomcat7/conf/context.xml（在倒数第二行插入）
http://s1.运维网.com/images/20180908/1536403191955656.png
catalina.sh stop
catalina.sh start
mkdir /web/webapp1/WEB-INF　　vim /web/webapp1/WEB-INF/web.xml

MySQL Test App

DB Connection
jdbc/TestDB
javax.sql.DataSource
Container

　　vim /web/webapp1/test.jsp



tomcat1


tomcat1 connect MySQL


#我在tomcat2上写的标题也有做区分。可以再截图中看到。　　验证5:，测试tomcat连接数据，本次案例完成。

http://s1.运维网.com/images/20180908/1536404443982973.png

http://s1.运维网.com/images/20180908/1536404457337266.png