tomcat+nginx简单实现负载均衡

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1.环境准备

在前面的博客中我已经安装好nginx和一台tomcat了。现在就在加一台tomcat

tomcat1: /apps/tomcat/tomcat1/apache-tomcat-7.0.69/

tomcat2: /apps/tomcat/tomcat2/apache-tomcat-7.0.69/

jdk:java7

nginx:nginx-1.4.2

给tomcat添加权限

chmod +775 -R /apps/tomcat/tomcat1

chmod +775 -R /apps/tomcat/tomcat2

tomcat下载地址： http://pan.baidu.com/s/1gf7gcVL

2.修改 server.xml 给tomcat配置不同的端口

cd /apps/tomcat/tomcat1/apache-tomcat-7.0.69/conf/

vi server.xml

tomcat1 8080

tomcat2 8081

3.给tomcat编写不同的测试页，用来测试nginx是否能分发请求

vi /apps/tomcat/tomcat1/apache-tomcat-7.0.69/webapps/ROOT/index.jsp

vi /apps/tomcat/tomcat2/apache-tomcat-7.0.69/webapps/ROOT/index.jsp

4.配置nginx

进入安装目录

cd /apps/install/nginx/conf/

编辑配置文件

vi /apps/install/nginx/conf/nginx.conf

添加如下部分

upstream的负载均衡，weight是权重，可以根据机器配置定义权重。weigth参数表示权值，权值越高被分配到的几率越大。

user root;
worker_processes 1;#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;#pid logs/nginx.pid;events {
worker_connections 1024;
}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; sendfile on;
#tcp_nopush on; #keepalive_timeout 0;
keepalive_timeout 65; #gzip on; upstream tomcat_server{
server localhost:8080 weight=1;
server localhost:8081 weight=1;
} server {
listen 80;
server_name localhost; #charset koi8-r; #access_log logs/host.access.log main; location / {
root html;
index index.html index.htm;
proxy_pass http://tomcat_server;
} # error_page 403 /html/index.html; # redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
} # proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#} # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#} # deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
} # another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias; # location / {
# root html;
# index index.html index.htm;
# }
#} # HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost; # ssl_certificate cert.pem;
# ssl_certificate_key cert.key; # ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m; # ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on; # location / {
# root html;
# index index.html index.htm;
# }
#}}