Permission denied in Docker container upon COPY and RUN of a file from git
TL;DR: Using COPY
to copy files into a Docker container retains the permissions from the host system. If host obtains the files from git
, make sure that file attributes are set correctly in git
to avoid getting a “Permission denied” error when using RUN
to execute these files in the Docker container.
Situation: Have a Dockerfile
which copies scripts/install_packages.sh
inside and executes it:
Dockerfile §
COPY scripts/install_packages.sh .
RUN ./install_packages.sh
Problem: The execution always fails with “Permission denied” when the Docker container runs in GitLab, even though execute permissions are granted on install_packages.sh
on the local file system.
GitLab CI/CD Docker error §
Step 5/5 : RUN ./install_packages.sh && rm install_packages.sh
---> Running in 130ab2b31ea5
/bin/sh: 1: ./install_packages.sh: Permission denied
The command '/bin/sh -c ./install_packages.sh' returned a non-zero code: 126
Running after_script
00:01
Uploading artifacts for failed job
00:02
ERROR: Job failed: exit code 126
Verifying local execute permissions §
$ ls scripts/ -lrth
total 1.0K
-rwxr-xr-x 1 sam 1234567 534 Oct 16 11:14 install_packages.sh*
Solution: Use git update-index --chmod+x <filename>
to grant the execute permissions within git
, so that when GitLab clones the file it has the execute permission.
git update-index --chmod=+x scripts/install_packages.sh