Docker arguments work w/ COPY but not ADD
Question:
Got this solved!
I learned my smart quotes lesson the hard way…
Although, now that I know this- I find it crazy that Docker themselves used smart quotes in this tutorial: https://www.docker.com/blog/how-to-dockerize-your-python-applications/
Just want to figure this out for my edification..
Just learning Docker and getting a "Hello World" in Python working…
My Dockerfile:
# FROM python:3.11
# ADD main.py .
# CMD [“python”, “./main.py”]
FROM python:3.11
COPY main.py .
CMD ["python", "./main.py"]
Main.py
print("Hello World")
It works fine with COPY (as is), but when I build/run with ADD I get:
/bin/sh: 1: [“python”,: not found
What am I missing?
From what I understand, these should be doing the same thing…
Answers:
It’s not the ADD or COPY causing this issue, it’s the two different CMD statements you’re using:
CMD [“python”, “./main.py”]CMD ["python", "./main.py"]
Replace the smart quotes with normal quotes, and you should be good.
Got this solved!
I learned my smart quotes lesson the hard way…
Although, now that I know this- I find it crazy that Docker themselves used smart quotes in this tutorial: https://www.docker.com/blog/how-to-dockerize-your-python-applications/
Just want to figure this out for my edification..
Just learning Docker and getting a "Hello World" in Python working…
My Dockerfile:
# FROM python:3.11
# ADD main.py .
# CMD [“python”, “./main.py”]
FROM python:3.11
COPY main.py .
CMD ["python", "./main.py"]
Main.py
print("Hello World")
It works fine with COPY (as is), but when I build/run with ADD I get:
/bin/sh: 1: [“python”,: not found
What am I missing?
From what I understand, these should be doing the same thing…
It’s not the ADD or COPY causing this issue, it’s the two different CMD statements you’re using:
CMD [“python”, “./main.py”]CMD ["python", "./main.py"]
Replace the smart quotes with normal quotes, and you should be good.