步骤 2 : 启动两个Tomcat 步骤 3 : 修改nginx.conf 步骤 4 : 重启nginx并访问
负载均衡的概念就是当访问量很大的时候,一个 Tomcat 吃不消了,这时候就准备多个 Tomcat,由Nginx按照权重来对请求进行分配,从而缓解单独一个Tomcat受到的压力
到多个Tomcat下载解压8111和8222两个tomcat,并启动
首先增加一个upstream ,用来指向这两个tomcat
upstream tomcat_8111_8222{ server 127.0.0.1:8111 weight=1; server 127.0.0.1:8222 weight=2; } 然后修改location,反向代理到上述配置。 location / { proxy_pass http://tomcat_8111_8222; } weight表示权重,值越大,被分配到的几率越大。 最大多少呢?我也不知道。。。反正10以内都可以用吧,我想的话~ #user nobody;
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_8111_8222{
server 127.0.0.1:8111 weight=1;
server 127.0.0.1:8222 weight=2;
}
server {
listen 80;
server_name localhost;
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
proxy_pass http://tomcat_8111_8222;
}
location ~\.(css|js|png)$ {
root C:/Users/X7TI/Downloads/tomcat_8111/webapps/ROOT;
}
#error_page 404 /404.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;
# }
#}
}
使用命令 nginx -s reload 重启,然后使劲访问
http://127.0.0.1/login.jsp 此时就可以观察到对jsp的访问,被分配到了不同的 Tomcat上
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