Docker nginx安装，部署web项目集群，负载均衡

拉取镜像

docker pull nginx

创建目录

mkdir -p /data/nginx/{conf,conf.d,html,logs}

在conf目录下创建nginx.conf并编辑

编辑nginx.conf文件

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 1024;
}

http {
    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  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  192.168.241.35;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        proxy_pass http://myngnix; 
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }

    upstream myngnix{
                server 192.168.241.35:8080 weight=5;
                server 192.168.241.35:8081 weight=5;
    }

}

以挂载的方式启动
–name 给你启动的容器起个名字，以后可以使用这个名字启动或者停止容器
-p 映射端口，将docker宿主机的82端口和容器的80端口进行绑定
-d 表示后台启动的是哪个镜像
第一个-v 表示将你本地的nginx.conf覆盖你要起启动的容器的nginx.conf文件，
第二个表示将日志文件进行挂载

docker run --name mynginx -d -p 82:80  -v /data/nginx/conf/nginx.conf:/etc/nginx/nginx.conf  -v /data/nginx/logs:/var/log/nginx -d docker.io/nginx

同样以挂载方式启动两个web项目。（注：项目名要相同，即都为SunECM）。部署详情见：https://blog.youkuaiyun.com/weixin_43614067/article/details/106430490

docker run --name tomcat8080 -d -v /opt/docker_file/SunECM:/usr/local/tomcat/webapps/SunECM -p
 8080:8080 --restart=always tomcat:latest 
 
 docker run --name tomcat8081 -d -v /opt/docker_file2/SunECM:/usr/local/tomcat/webapps/SunECM -p
 8081:8080 --restart=always tomcat:latest 

nginx访问路径：http://192.168.241.35:82/SunECM/
配置以权重的方式负载均衡。测试4次，结果如图