此為 2021 網路管理課程的 lab14，花了一整晚搞不定 php-fpm 在 docker 寫檔的問題 (已經調整過權限、目錄也 mount 了還是不行) 耗費五到六個小時，後來砍掉重練，改成用 python + redis 的記憶體儲存，兩個小時就幹完了，真是累死人。
以下只有 code，沒力氣打詳細解釋了…，共五個檔案
app.py
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import time
import redis
from flask import Flask, request
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)
@app.route('/set/<key>', methods=['POST'])
def set(key):
retries = 5
while True:
try:
value = request.form.get('value')
if value != None:
cache.set(key, value)
return 'OK'
else:
return ''
except redis.exceptions.ConnectionError as exc:
if retries == 0:
raise exc
retries -= 1
time.sleep(0.5)
@app.route('/get/<key>', methods=['POST', 'GET'])
def get(key):
if cache.exists(key):
return cache[key]
else:
return ''
requirements.txt
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flask
redis
site.conf
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server {
listen 80;
index index.php index.html;
server_name localhost;
error_log /var/log/nginx/error.log;
access_log /var/log/nginx/access.log;
root /lab14;
location / {
proxy_pass http://flask:5000;
}
location ~ ^(/set)/[^/]+ {
proxy_pass http://flask:5000;
}
location ~ ^(/get)/[^/]+ {
proxy_pass http://flask:5000;
}
}
Dockerfile
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# syntax=docker/dockerfile:1
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"]
docker-compose.yml
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version: "3.9"
services:
nginx:
image: nginx:latest
ports:
- "8080:80"
volumes:
- ./site.conf:/etc/nginx/conf.d/default.conf
flask:
build: .
volumes:
- .:/code
redis:
image: "redis:alpine"
將這些檔案放到讀一目錄，然後執行 sudo docker-compose up 即可
用 localhost:8080 測，測試方式跟 lab7 一樣
