docker + uwsgi + nginx + flask

工作中写的python脚本，想在alpine环境中搭建nginx+uwsgi+flask服务，在此记录过程以及遇到的坑

#### 目录结构
```
./
├── app
│   ├── app.py
│   ├── requirements.txt
│   └── uwsgi.ini
├── Dockerfile
├── nginx.conf
└── README
```
- **Dockerfile**

```
FROM alpine:3.10

ENV LANG C.UTF-8
ENV TIMEZONE Asia/Shanghai

RUN echo -e "http://mirrors.aliyun.com/alpine/v3.10/main/\nhttp://mirrors.aliyun.com/alpine/v3.10/community" > /etc/apk/repositories \
    && apk add -U tzdata && ln -snf /usr/share/zoneinfo/${TIMEZONE} /etc/localtime && echo "${TIMEZONE}" > /etc/timezone \
    && apk add --update --upgrade \
    && apk add --no-cache nginx python3 uwsgi uwsgi-python3  \
#    && pip3 install --no-cache-dir --upgrade pip \
    && ln -s /usr/bin/python3 /usr/bin/python \
    && mkdir -p /{app,log}

WORKDIR /app

COPY ./app/ /app/
ADD ./nginx.conf  /etc/nginx/nginx.conf

RUN pip3 install  --no-cache-dir -r /app/requirements.txt -i https://mirrors.aliyun.com/pypi/simple/

EXPOSE 3001
ENTRYPOINT  nginx -g "daemon on;" && uwsgi --ini /app/uwsgi.ini
```
- **nginx.conf**

```
#user  nobody;
worker_processes  auto;

error_log  /log/error.log warn;
pid        /var/run/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  /log/access.log  main;
    #access_log  "pipe:rollback logs/access_log interval=1d baknum=7 maxsize=2G"  main;

sendfile        on;
    #tcp_nopush     on;

#keepalive_timeout  0;
    keepalive_timeout  65;

#gzip  on;
    include /etc/nginx/conf.d/*.conf;

server {
        listen       3001;
        server_name  _;

charset utf-8;
        location / {
            include uwsgi_params;
            uwsgi_pass unix:///app/uwsgi.sock;
            uwsgi_send_timeout 300;
            uwsgi_connect_timeout 300;
            uwsgi_read_timeout 300;
      }

}

}
```

- **app.py**

```
# 此处仅保留测试代码，其他代码已经删除
# -*- coding: utf-8 -*-
# __author__ = 'Erica'
from flask import Flask, request

app = Flask(__name__)

@app.route('/hello', methods=['GET'])
def hello():
    return 'hello, this is a test page'
if __name__ == '__main__':
    app.run(host='0.0.0.0', port=3001, debug=True)
```
- **requirements.txt**

```
Flask==1.1.1
requests==2.22.0
```

- ** uwsgi.ini **

```
[uwsgi]
chdir = /app
wsgi-file = /app/app.py
callable = app
plugin = python3
uwsgi-socket = /app/uwsgi.sock
chmod-socket = 777
```

#### 启动
```
docker build -t pytest:1.0 .
docker run -itd --name pytest -p 3001:3001 -v /data/pytest:/log/ pytest:1.0
```
#### 测试
```
[root@localhost]# curl -XGET http://127.0.0.1:3001/hello
hello, this is a test page
```
#### 遇到的问题
**1. py文件中含有 ^M 符号**
我的是centos7系统，yum安装 dos2unix转换
```
[root@localhost]# yum -y install dos2unix
[root@localhost]# dos2unix app.py
```

**2. 如果只使用uwsgi，不使用nginx，则uwsgi配置文件如下**

```
[uwsgi]
http-socket = 0.0.0.0:3001
chdir = /app
wsgi-file = /app/app.py
callable = app
plugin = python3
```

docker + uwsgi + nginx + flask

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