I'm having trouble pulling a local Docker image from my GitLab runner pipeline. I can successfully run the image using the command `docker run -it mybaseimage:latest /bin/bash` in the terminal, but when I try to run it in the GitLab pipeline, I encounter the following error:
`ERROR: Job failed: failed to pull image "mybaseimage:latest" with specified policies [always]: Error response from daemon: pull access denied for mybaseimage:latest, repository does not exist or may require 'docker login': denied: requested access to the resource is denied (manager.go:238:1s)`. Here's my job configuration:
```yaml
mytest_test:
stage: merge_request_testing
only:
- merge_requests
tags:
- my-test
image: mybaseimage:latest
interruptible: true
script:
- echo "Running tests"
- export PYTHONPATH=/app:$PYTHONPATH
- source /app_venv/bin/activate
- pip install --no-cache-dir pytest
- cd /app
- pytest ./python
```
Do I need to log in to the local repository with `docker login`? That seems odd since I can use the image in the terminal but not in my test stage.
4 Answers
You might need to login to the Docker registry depending on your runner setup. Check out the documentation on authenticating registries [here](https://docs.gitlab.com/ci/docker/authenticate_registry/). Even if you're using a local image, GitLab might be expecting you to authenticate first.
Where did you get `mybaseimage:latest` from? Did you build it locally or pull it from a registry? If it's built locally, the runner needs to have access to that image on the same machine.
Why would logging in to the local repo be weird? If both the runner and the Docker image are on the same machine, it’s worth trying to see if you need to authenticate. It might seem redundant, but it can help in case the Docker daemon is set up that way.
The issue here seems to be that the image isn't actually available to the runner. Even if you built it locally, if your pipeline is set up to run on a different runner that hasn't built the image, then it won’t find it. Ensure that your pipeline is building the image or check that the runner can access it.
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