linux下tomcat+nginx实现集群和负载均衡_nginx+tomcat 在麒麟实现集群-优快云博客

本文链接：https://blog.youkuaiyun.com/AJAX20032007/article/details/42340197

一、设备应用规划：

192.168.10.101 tomcat，处理动态页

192.168.10.104 tomcat，处理动态页

192.168.10.106 nginx 处理静态页

二、查看pcre安装情况，如果未安装，先安装pcre

已经安装的情况

[root@localhostpcre-8.32]# rpm -q pcre

pcre-7.8-6.el6.x86_64

未安装的情况

tar -zxvfpcre-8.32.tar.gz

cd pcre-8.32

./configure--prefix=/opt/pcre

make

make install

备注:

报错：

configure:error: You need a C++ compiler for C++ support

处理：

yum install -ygcc gcc-c++

三、安装nginx

tar -zxvfnginx-1.4.4.tar.gz

cd nginx-1.4.4

./configure--prefix=/opt/nginx --with-http_ssl_module--with-http_gzip_static_module --with-http_stub_status_module

报错

./configure:error: the HTTP rewrite module requires the PCRE library.

You can eitherdisable the module by using --without-http_rewrite_module

option, orinstall the PCRE library into the system, or build the PCRE library

statically fromthe source with nginx by using --with-pcre=<path> option.

解决方法：

yum -y install pcre-devel

报错

./configure:error: SSL modules require the OpenSSL library.

You can eitherdo not enable the modules, or install the OpenSSL library

into the system,or build the OpenSSL library statically from the source

with nginx byusing --with-openssl=<path> option.

解决方法：

查看openssl安装情况

[root@localhostnginx-1.4.4]# rpm -q openssl

openssl-1.0.1e-15.el6.x86_64

yum -y installopenssl-devel

安装成功:

onfigurationsummary

+ using system PCRE library

+ using system OpenSSL library

+ md5: using OpenSSL library

+ sha1: using OpenSSL library

+ using system zlib library

nginx path prefix: "/opt/nginx"

nginx binary file:"/opt/nginx/sbin/nginx"

nginx configuration prefix:"/opt/nginx/conf"

nginx configuration file:"/opt/nginx/conf/nginx.conf"

nginx pid file:"/opt/nginx/logs/nginx.pid"

nginx error log file: "/opt/nginx/logs/error.log"

nginx http access log file:"/opt/nginx/logs/access.log"

nginx http client request body temporaryfiles: "client_body_temp"

nginx http proxy temporary files:"proxy_temp"

nginx http fastcgi temporary files:"fastcgi_temp"

nginx http uwsgi temporary files:"uwsgi_temp"

nginx http scgi temporary files:"scgi_temp"

make

make install

四、修改当前打开的最大文件数

ulimit -n 65535

vi/etc/security/limits.conf

添加两行

* soft nofile65535

* hard nofile65535

vi/etc/pam.d/login

添加一行

session required pam_limits.so

五、配置nginx

vi/opt/nginx/conf

user nobody ;

worker_processes 2;

error_log logs/error.log error;

pid logs/nginx.pid;

#一个nginx进程打开的文件描述符的上限

worker_rlimit_nofile65535;

events {

use epoll;

#一个进程允许的最大同时连接数

worker_connections 65535;

}

http {

include mime.types;

default_type application/octet-stream;

#负载均衡设置，ttt为随意设置的名称

upstream ttt{

ip_hash;

server 192.168.10.101:80;

server 192.168.10.104:80;

}

#access_log logs/access.log main;

client_max_body_size 20m;

client_header_buffer_size 32k;

large_client_header_buffers 4 32k;

sendfile on;

tcp_nopush on;

tcp_nodelay on;

#keepalive_timeout 0;

keepalive_timeout 60;

client_header_timeout 10;

client_body_timeout 10;

send_timeout 10;

#gzip on;

fastcgi_intercept_errors on;

server {

#80端口接收用户的请求

listen 80;

#chinavvv2为nginx所在主机的主机名

server_name 192.168.10.106;

index index.jsp index.html;

root /opt/webapps/ROOT;

charset UTF-8;

#access_log logs/host.access.log main;

#location /image/{

# alias /opt/webapps/ROOT/image/;

#location /images/{

# alias /opt/webapps/ROOT/images/;

# }

#location /sitegroup/

# root /opt/webapps/ROOT/;

location ~ ^/(WEB-INF)/

{

deny all;

}

location ~\.(htm|html|asp|php|gif|jpg|jpeg|png|bmp|ico|rar|css|js|zip|java|jar|txt|flv|swf|mid|doc|ppt|xls|pdf|txt|mp3|wma)${

root /opt/webapps/ROOT;

expires 24h;

}

#location ~*\.(jpg|gif|png|swf|flv|wma|wmv|asf|mp3|mmf|zip|rar)$

# valid_referers none blocked 127.0.0.1;

# if ($invalid_referer)

# {

# rewrite ^/ /images/error.gif;

#return 403;

# }

location ~ (\.jsp)|(\.do)$ {

#location / {

#访问地址设置为ttt,与上面的一致

proxy_pass http://ttt;

proxy_next_upstream http_500http_502 http_503 error timeout invalid_header;

include /opt/nginx/conf/proxy.conf;

}

error_page 404 /404/404.html;

# redirect server error pages to thestatic page /50x.html

error_page 500 502 503 504 /404.html;

location = /404.html {

root /opt/webapps/ROOT/404/;

}

上传proxy.conf文件到/opt/nginx/conf/路径下

六、开启、停止、重启nginx

测试nginx是否安装成功

/opt/nginx/sbin/nginx -t

返回结果：

nginx: theconfiguration file /opt/nginx/conf/nginx.conf syntax is ok

nginx:configuration file /opt/nginx/conf/nginx.conf test is successful

开启nginx

/opt/nginx/sbin/nginx

ps -ef|grep -vgrep|grep nginx

root 19138 1 0 11:39 ? 00:00:00 nginx: master process/opt/nginx/sbin/nginx

nobody 19139 19138 0 11:39 ? 00:00:00 nginx:worker process

停止nginx

从容停止Nginx：

kill -QUIT 主进程号

快速停止Nginx：

kill -TERM 主进程号

强制停止Nginx：

pkill -9 nginx

修改配置文件nginx.conf后，平滑重启nginx

kill -HUP 主进程号

举例：

[root@localhostROOT]# ps -ef|grep -v grep|grep nginx

root 18124 1 0 16:07 ? 00:00:00 nginx: master process/opt/nginx/sbin/nginx

nobody 18125 18124 0 16:07 ? 00:00:00 nginx:worker process

nobody 18126 18124 0 16:07 ? 00:00:00 nginx:worker process

[root@localhostROOT]# kill -HUP 18124

[root@localhostROOT]# ps -ef|grep -v grep|grep nginx

root 18124 1 0 16:07 ? 00:00:00 nginx: master process/opt/nginx/sbin/nginx

nobody 18235 18124 0 16:48 ? 00:00:00 nginx:worker process

nobody 18236 18124 0 16:48 ? 00:00:00 nginx:worker process

添加nginx开机自启动

七、发布应用程序

192.168.10.101和192.168.10.104分别发布程序到/opt/webapps/webapps，修改数据库链接池

启动tomcat

192.168.10.106发布程序到/opt/webapps/webapps

八、测试集群

1.首先访问http://192.168.10.106

2.关闭192.168.10.101上的tomcat

3.访问动态页是否正常

九、测试负载均衡

1.访问http://192.168.10.106,查看在线会话数

[root@localhost~]# netstat -an|grep 80|wc -l

说明静态页由192.168.10.106来处理

2.访问动态页正常，

在192.168.10.101查看在线会话数

[root@localhostbin]# netstat -an|grep 80|wc -l

在192.168.10.104查看在线会话数

[root@localhostbin]# netstat -an|grep 80|wc -l