tomcat nginx 均衡负载

1，在docker中启动三个tomcat,
docker run -d -p 9091:8080 --name tomcat-nginx1 tomcat:latest   
docker run -d -p 9092:8080 --name tomcat-nginx2 tomcat:latest
docker run -d -p 9093:8080 --name tomcat-nginx3 tomcat:latest

2copy一个工程进三个tomcat,每个里面都有一个index.jsp,jsp的内容就是index1,index2,index3

 docker cp /opt/TestTomcat.war  f5c5b68bf627:/usr/local/tomcat/webapps/
 docker cp /opt/TestTomcat.war  3e9fa4972bd5:/usr/local/tomcat/webapps/
 docker cp /opt/TestTomcat.war  f02da3d462ca:/usr/local/tomcat/webapps/

3，启动一个nginx

 docker run -d -p 80:80  --name nginx-test   ngin

4.进入nginx容器 

 docker exec -i -t   6800c2db34e4  bash 进入nginx容器

docker cp 5dbecf161268:/etc/nginx/nginx.conf /opt/nginx/conf/  （把文件copy出来）

/usr/share/nginx/html   (默认的hmlt目录)

/etc/nginx/nginx.conf   （配置文件目录）

/var/log/nginx   （日志目录）

配置文件修改成以下的样子

#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;
    
    #集群
    upstream myservers {   
        server 127.0.0.1:9091 weight=1; 
        server 127.0.0.1:9092 weight=1;
        server 127.0.0.1:9093 weight=1; 
     }

    server {
        listen       80;
        server_name  127.0.0.1;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            proxy_pass http://myservers/TestTomcat/;
            proxy_redirect default;
        }

        #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;
    #    }
    #}

}