Question
How to change permissions to /tmp folder in Docker image
- Posted February 28, 2022
- Ubuntu 20.04
Hi! In my Dockerfile, I have this line:
RUN chmod go-w -R /tmp && mkdir /tmp/secrets
it builds successfully. On my local machine, this works. There is a folder under /tmp and the folder itself has the right permissions.
However, in my image on Digital Ocean Apps; /tmp is still marked with drwxrwxrwt root root and there is no directory /tmp/secrets
Why is it like this?
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Hi there,
I believe that
/tmpis cleared after every restart meaning that once you start a container from that image, it will have a blank/tmpdirectory.Alternatively, you could use
/var/tmpas it does not get cleared after a restart.I’ve just tested this with
/var/tmpand it seems to be working as expected.Best,
Bobby