【原文链接】
(1)在 /home 目录下创建composetest目录,并进入此目录
mkdir composetest
cd composetest
(2)创建一个flask服务文件,app.py,内容如下:
vi app.py
编写内容如下:
import time
import redis
from flask import Flask
app = Flask(__name__)
cache = redis.Redis(host='redis', port=6379)
def get_hit_count():
retries = 5
while True:
try:
return cache.incr('hits')
except redis.exceptions.ConnectionError as exc:
if retries == 0:
raise exc
retries -= 1
time.sleep(0.5)
@app.route('/')
def hello():
count = get_hit_count()
return 'Hello World! I have been seen {} times.\n'.format(count)
(3)创建flask服务的安装依赖文件
vi requirements.txt
编写内容如下:
flask
redis
(4)创建一个Dockerfile文件
vi Dockerfile
编写内容如下:
# syntax=docker/dockerfile:1
FROM python:3.7-alpine
RUN sed -i -e 's/http:/https:/' /etc/apk/repositories
WORKDIR /code
ENV FLASK_APP=app.py
ENV FLASK_RUN_HOST=0.0.0.0
RUN apk add --no-cache gcc musl-dev linux-headers
COPY requirements.txt requirements.txt
RUN pip install -r requirements.txt
EXPOSE 5000
COPY . .
CMD ["flask", "run"]
(5)创建docker-compose.yml文件
vi docker-compose.yml
编写内容如下:
version: "3.9"
services:
web:
build: .
ports:
- "5000:5000"
redis:
image: "redis:alpine"
(6)启动容器
docker-compose up # 后台启动使用 docker-compose up
(7)浏览器打开ip:5000
部署已经OK,每次刷新一次页面,times 值都会刷新