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gcloud-docker-login's Introduction

gcloud-docker-login

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Generates '.dockercfg' file with a valid GCR access token, given a service account JSON content.

The use-case is for cases when using a CI/CD tool and you need an authenticated Docker session to Google Container Registry without much hassle.

To accomplish this simple task, this image accepts an environment variable called GCP_SA_JSON, which it expects to contain your service account's JSON content (NOT the path to the file!), and uses gcloud to create an authenticated .dockercfg file, using gcloud docker --authorize-only.

The image will print out the .dockercfg contents to stdout which allows you to manipulate it in any way you see fit (but usually you'll just want to redirect it to a file.)

Examples

Assuming you have a service account JSON key at my-sa-key.json, use this command to create a .dockercfg file that will use your service account file to access GCR:

docker run -e "GCP_SA_JSON=$(cat my-sa-key.json)" infolinks/gcloud-docker-login > ~/.dockercfg

Contributions

Any contribution to the project will be appreciated! Whether it's bug reports, feature requests, pull requests - all are welcome, as long as you follow our contribution guidelines for this project and our code of conduct.

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