docker 搭建 nginx负载均衡

本文描述如何在一台机器上搭建nginx负载均衡，我将会启动3个nginx的docker，分别是1台前置nginx负责分发，后面2台负责处理请求。

首先我切换到/usr/local/docker/文件夹下，这个文件夹是专门用来做docker映射文件夹用的，docker里的重要的文件夹会映射到这里，在这里执行

mkdir nginx

mkdir nginx01

mkdir nginx02

nginx下存储的是前置nginx的文件

nginx01和nginx02负责存储后边两台nginx服务器的文件

《一、前置nginx配置以及启动》

切换到/usr/local/docker/nginx下

然后执行

mkdir -p conf  html  logs

切换到conf

vim nginx.conf

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;
        root         /usr/share/nginx/html;

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

        location / {
        proxy_pass http://pic;
        }

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

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

    upstream pic{
                server 172.26.200.89:8088 weight=5;
                server 172.26.200.89:8089 weight=5;
    }

}

配置好以后，保存conf文件

然后启动这个前置nginx

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

《二、nginx01配置以及启动》

切换到/usr/local/docker/nginx01/文件夹

执行

mkdir -p conf  html  logs

然后切换到conf文件夹

vim nginx.conf

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 8088;
    root /usr/share/nginx/html;
        index index.html index.htm;
    }

}

然后保存配置文件，退出

切换到/usr/local/docker/nginx01/html/文件夹下

vim index.html，简单写点东西，如下

8088 port nginx

然后启动docker

docker run --name mynginx01 -d -p 8088:8088 -v /usr/local/docker/nginx01/conf/nginx.conf:/etc/nginx/nginx.conf -v /usr/local/docker/nginx01/logs:/var/log/nginx -v /usr/local/docker/nginx01/html:/usr/share/nginx/html -d nginx

《三、nginx02配置以及启动》

切换到/usr/local/docker/nginx02/文件夹

执行

mkdir -p conf  html  logs

然后切换到conf文件夹

vim nginx.conf

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 8089;
    root /usr/share/nginx/html;
        index index.html index.htm;
    }

}

然后保存配置文件，退出

切换到/usr/local/docker/nginx02/html/文件夹下

vim index.html，简单写点东西，如下

8089 port nginx

然后启动docker

docker run --name mynginx02 -d -p 8089:8089  -v /usr/local/docker/nginx02/conf/nginx.conf:/etc/nginx/nginx.conf  -v /usr/local/docker/nginx02/logs:/var/log/nginx -v /usr/local/docker/nginx02/html:/usr/share/nginx/html -d nginx

-------------------------------分割线-----------------------

至此，前置nginx和两台后置nginx都启动了，我们测试一下

在命令行执行

curl 127.0.0.1:82

如下图：

可以看到，由于我们前置nginx上的负载策略是各百分之50，所以出现了第一次请求发送到8088的nginx，第二次请求发送到8089的nginx，第三次又到8088，第四次8089。。。。。。

大家仅供参考，谢谢阅读全文。

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原文地址：https://www.cnblogs.com/lukairui/p/12571782.html