摘要：應(yīng)用無法連接，本文使用方式。在數(shù)據(jù)庫的配置應(yīng)相應(yīng)寫成地址一定要寫你配置的的名字本地測試時改回中配置使用的代理模式，其中執(zhí)行應(yīng)用的，應(yīng)為內(nèi)網(wǎng)

Nginx做為服務(wù)器，Mongo為數(shù)據(jù)庫支持，F(xiàn)lask為Python語言的Web框架，利用Docker的容器特性，可以簡單地部署在linux服務(wù)器上

項目主要目錄如下

__ project-name
    |__ docker-file
        |__ ningx
            |__ Dockerfile
            |__ conf
                |__ nginx.conf
        |__ flask
            |__ Dockerfile
            |__ requirements.txt
        |__ mongo
            |__ Dockerfile
            |__ setup.sh
        |__ docker-compose.yml
    |__ src
        |__ app
            |__ ...
        |__ run.py

簡要說明

docker-file目錄為docker部署的配置文件

src目錄為flask應(yīng)用的python代碼

version: "2.2"
services:
  mongo:
    build: ./mongo
    volumes:
      - "./mongo/db:/data/db"
    restart: always
    ports:
      - "27017:27017"
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: 123456
  flask:
    build: ./flask
    links:
      - mongo
    ports:
      - "5000:5000"
    expose:
      - "5000"
    volumes:
      - ../src:/home/web
  nginx:
      build: ./nginx
      links:
        - flask
      volumes:
        - "./nginx/log:/var/log/nginx"
        - "../:/usr/share/nginx/html"
      ports:
        - "80:80"
        - "8080:8080"
        - "443:443"
      restart: always

/mongo/Dockerfile的內(nèi)容如下

FROM mongo:3.6
# 設(shè)置時區(qū)
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
# 設(shè)置工作目錄
ENV WORKDIR /usr/local/work
ENV AUTO_RUN_DIR /docker-entrypoint-initdb.d
ENV INSTALL_MONGO_SHELL setup.sh
RUN mkdir -p $WORKDIR
# 復(fù)制數(shù)據(jù)庫的初始化命令
COPY ./$INSTALL_MONGO_SHELL $AUTO_RUN_DIR/
RUN chmod +x $AUTO_RUN_DIR/$INSTALL_MONGO_SHELL

/mongo/setup.sh的內(nèi)容如下

該文件的目的是，啟動MongoDB后創(chuàng)建一個密碼為test的用戶test，并賦予它數(shù)據(jù)庫test的讀寫操作

#!/bin/bash
mongo <
Flask應(yīng)用的配置
/flask/Dockerfile的內(nèi)容如下
FROM python:3.6
# 設(shè)置時區(qū)
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

# 設(shè)置工作區(qū)
RUN mkdir -p /home/web
WORKDIR /home/web
# 添加依賴
ADD requirements.txt /home/web/requirements.txt
RUN pip3 install -i https://pypi.douban.com/simple/ -r requirements.txt

# 使用gunicorn啟動應(yīng)用
CMD gunicorn -w 4 -b 0.0.0.0:5000 run:app
/src/app/run.py的代碼
此處注釋了調(diào)試用的 app.run()，發(fā)布時用gunicorn啟動
from app import create_app
app = create_app("default")
app.debug=False
# if __name__ == "__main__":
#    app.run()
Nginx的配置
/nginx/Dockerfile的內(nèi)容如下
FROM nginx:1.14
# 設(shè)置時區(qū)
ENV TZ=Asia/Shanghai
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
# 復(fù)制配置
COPY conf/nginx.conf /etc/nginx/nginx.conf
/nignx/conf/nginx.conf的內(nèi)容如下
user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}


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

    sendfile        on;
    #tcp_nopush     on;

    keepalive_timeout  65;

    # 開啟gzip
    gzip on;
    gzip_min_length 1k;
    gzip_buffers 4 16k;
    #gzip_http_version 1.0;
    gzip_comp_level 1;
    gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php image/jpeg image/gif image/png;
    gzip_vary off;
    gzip_disable "MSIE [1-6].";

    server {
        listen 80;
        server_name localhost;
        keepalive_timeout 5;
        root /usr/share/nginx/html;

        location /static/ {
            alias /usr/share/nginx/html/src/app/static/;
        }

        location / {
            # checks for static file, if not found proxy to app
            try_files $uri @flask_app;
        }

        location @flask_app {
            proxy_pass http://192.168.0.2:5000;  # 發(fā)布在阿里云上，應(yīng)填寫內(nèi)網(wǎng)IP
            proxy_redirect off;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $http_host;
            proxy_set_header X-Real-IP $remote_addr;

            #proxy_buffers 8 32k;
            #proxy_buffer_size 64k;

        }
    }


}


啟動部署

進(jìn)入docker-flie目錄 cd docker-flie

啟動docker docker-compose up

查看容器狀態(tài) docker ps

本地部署瀏覽器輸入 127.0.0.1即可

最后出現(xiàn)類似docker_file_nginx_1,docker_file_mongo_1, docker_file_flask_1的3個容器，說明成功?。。?/p>
踩坑吐槽
1 mongol容器中的初始化文件需要放在 docker-entrypoint-initdb.d 目錄下
本人做過如下嘗試，會顯示 mongdb未啟動。
ADD setup.sh /data/setup.sh
RUN chmod +x /data/setup.sh
CMD ["/data/setup.sh"]
2 flask應(yīng)用無法連接mongo，本文使用link方式。
在數(shù)據(jù)庫的配置應(yīng)相應(yīng)寫成：
MONGODB_SETTINGS = {
        "db": "test",
        "host": "mongo",  # 127.0.0.1 host地址一定要寫你配置的--link的名字
        "username": "test",
        "password": "test",
        "port": 27017
    }
本地測試時改回127.0.0.1
3 nginx中配置使用的代理模式，其中執(zhí)行flask應(yīng)用的IP，應(yīng)為內(nèi)網(wǎng)IP