快速搭建编排上线项目实例
Flask + Redis + Docker-compose 快速搭建与上线简易版网络服务
案例来自于官方文档，后由自我优化编写，更轻量、便捷、快速此项目
请确保docker，docker-compose 能正常运行
实例
构建与运行
- 编写项目
- 环境准备
- 编写业务代码
- 运行测试
- 书写Dockerfile
- 书写docker-compose.yml
- 运行
- 创建服务
- docker-compose build of dockerfile
- 创建网络
- 执行docker-compose
- 项目启动
编写业务代码
# 新建一个项目目录
mkdir -p composetest
vim app.py
# app.py
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)
# Esc :wq
# 书写requirements.txt
flask
redis# other app.pyimport timeimport redisfrom 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)if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)书写Dockerfile
vim Dockerfile
# Dockerfile
FROM python:3.7-alpine
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"]
# Esc :wq# other Dockerfile
FROM python:3.7-alpine
ADD . /code
WORKDIR /code
RUN pip install -r requirements.txt
CMD ["python", "app.py"]
# Esc :wq编写docker-compose.yaml
vim docker-compose.yaml# docker-compose.yamlversion: "3.8"services:
web:
build: .
ports:
- "5000:5000"
redis:
image: "redis:alpine"
# Esc :wq# other docker-compose.yaml
version: "3.8"
services:
web:
build: .
ports:
- "5000:5000"
volumes:
- .:/code
redis:
image: "redis:alpine"docker-compose up
docker-compose up实例优化
业务代码
在后面增加了main函数，这样可以使得我们更便捷与轻量的运行任务
# other app.py
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)
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)requirements 上同
Dockerfile
FROM python:3.7-alpine
ADD . /code
WORKDIR /code
RUN pip install -r requirements.txt
CMD ["python", "app.py"]docker-compose.yaml
挂载
version: "3.8"
services:
web:
build: .
ports:
- "5000:5000"
volumes:
- .:/code
redis:
image: "redis:alpine"本文参与 腾讯云自媒体同步曝光计划，分享自微信公众号。
原始发表：2020-10-07，如有侵权请联系 cloudcommunity@tencent.com 删除
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