[英]Python script can't find ENV variable run with CRON in docker container
I want to run a Python script in a Docker container with crontab, now cron successfully run the python script but it can't find ENV variable given from Dockerfile, when i run echo $DOG from inside the container is shows up expected string "dog " 或者当 ik 手动运行 python 脚本/> python dog.py
时,它可以找到 ENV 变量。 所以 ENV 在容器内的操作系统中。
为什么 cron 运行的脚本无法访问它?
crontab
* * * * * /usr/local/bin/python3 /app/dog.py > /proc/1/fd/1 2>/proc/1/fd/2
# empty line
Dockerfile
FROM python:3.10
RUN apt-get update && apt-get install -y cron
WORKDIR /app/
COPY crontab .
COPY dog.py .
RUN chmod -R 755 /app/
RUN crontab /app/crontab
CMD ["cron", "-f"]
狗.py
#!/usr/bin/python
import os
# Check os env variables
if "DOG" in os.environ:
dog = os.environ.get("DOG")
print(dog)
else:
print("no env")
docker-compose.yaml
---
version: "3.8"
services:
prd-workorder-worker:
build: .
environment:
- DOG=dog
我通过运行 bash 脚本解决了这个问题,该脚本在容器启动时将所有变量放入 /etc/environment。
Dockerfile
...
CMD ["./entry.sh"]
入口.sh
#!/bin/bash
printenv | grep -v "no_proxy" >> /etc/environment
cron -f
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