docker演示nginx负载均衡

小鱼儿 2023-02-20 06:57 2阅读 0赞

**背景：在上篇[ docker演示nginx反向代理][docker_nginx] 基础上继续**

### 一、编写脚本 ###

**1. 分别编写load\_balancing\_8000.py、load\_balancing\_8001.py脚本（注意脚本对应端口分别为8000、8001）**

#!/usr/bin/python3
    # -*- coding: UTF-8 -*-
    
    from flask import Flask
    
    app = Flask(__name__)
    
    
    @app.route('/api', methods=['GET'])
    def get_msg():
    
        """
        curl -X GET 'http://192.168.1.110:8000/api'
        """
        return "The server port is 8000"
    
    
    if __name__ == "__main__":
        app.run(host="0.0.0.0", port=8000, debug=True)

### 二、运行脚本 ###

E:\Python\Python38\python3.exe F:/IdeaProjects/my-jooq/my-python/load_balancing_8000.py
     * Serving Flask app "load_balancing_8000" (lazy loading)
     * Environment: production
       WARNING: This is a development server. Do not use it in a production deployment.
       Use a production WSGI server instead.
     * Debug mode: on
     * Restarting with stat
     * Debugger is active!
     * Debugger PIN: 936-026-506
     * Running on http://0.0.0.0:8000/ (Press CTRL+C to quit)

E:\Python\Python38\python3.exe F:/IdeaProjects/my-jooq/my-python/load_balancing_8001.py
     * Serving Flask app "load_balancing_8001" (lazy loading)
     * Environment: production
       WARNING: This is a development server. Do not use it in a production deployment.
       Use a production WSGI server instead.
     * Debug mode: on
     * Restarting with stat
     * Debugger is active!
     * Debugger PIN: 936-026-506
     * Running on http://0.0.0.0:8001/ (Press CTRL+C to quit)

###  三、修改配置 ###

**1. 修改nginx.conf配置**

# 定义Nginx运行的用户和用户组
    user  nginx;
    
    # nginx进程数，通常设置成和cpu的数量相等
    worker_processes  4;
    
    # 全局错误日志定义类型，[debug | info | notice | warn | error | crit]
    error_log  /var/log/nginx/error.log warn;
    
    # 进程pid文件
    pid        /var/run/nginx.pid;
    
    # 单个进程最大连接数（最大连接数=连接数+进程数）
    events {
        worker_connections  1024;
    }
    
    
    http {
        # 文件扩展名与文件类型映射表
        include       /etc/nginx/mime.types;
        
        # 默认文件类型
        default_type  application/octet-stream;
        
        # 日志格式
        log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                          '$status $body_bytes_sent "$http_referer" '
                          '"$http_user_agent" "$http_x_forwarded_for"';
        
        # 主机的访问日志
        access_log  /var/log/nginx/access.log  main;
    
        sendfile        on;
        #tcp_nopush     on;
    
        keepalive_timeout  65;
    
        #gzip  on;
    
        include /etc/nginx/conf.d/*.conf;
        
        upstream api_server {
            # 负载均衡，默认使用轮询
            server 192.168.1.110:8000;
            server 192.168.1.110:8001;
        }
        server {
            # 如果使用docker容器，必须暴露该端口
            listen       8088;
            server_name  172.20.228.138;
    
            # location / {
                # # 如果使用容器，可以使用容器本身的ip，可以使用docker0的ip，也可以使用宿主机ip
                # # proxy_pass http://172.18.0.14:9200/;
                # proxy_pass http://172.17.0.1:9200;
                # # proxy_pass http://172.20.228.138:9200;
                # index  index.html index.htm index.jsp;
            # }
            location ~ ^/api {
                proxy_pass http://api_server;
            }
        }
        
    }

### 四、重启容器或者重新加载配置 ###

### 五、查看结果 ###

**1. 打开浏览器，查看请求[http://172.20.228.138:8088/api][http_172.20.228.138_8088_api]，多次刷新**

![20200624113045453.png][]

![20200624113110527.png][]

**2. 或者使用curl命令**

![2020062411323026.png][]

**从结果可以看出负载均衡成功，到此演示结束**

[docker_nginx]: https://blog.csdn.net/zsx18273117003/article/details/106938264
[http_172.20.228.138_8088_api]: http://172.20.228.138:8088/api
[20200624113045453.png]: https://img-blog.csdnimg.cn/20200624113045453.png
[20200624113110527.png]: https://img-blog.csdnimg.cn/20200624113110527.png
[2020062411323026.png]: https://img-blog.csdnimg.cn/2020062411323026.png