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Adding a Google Cloud Container Registry

While ODIN Fleet does not officially support Google Cloud Container Registries (GCR), you can still integrate GCR using the Custom option. This guide will walk you through the necessary steps.

1. Set Up Your Google Cloud Container Registry​

Ensure that your GCR is properly set up and that you have the necessary permissions and authentication details. You can find more information on setting up GCR in the Google Cloud Container Registry Documentation.

2. Obtain Your Docker Credentials​

Use the gcloud CLI tool to generate a Docker-compatible authentication configuration. Run the following command to authenticate Docker with GCR:

gcloud auth configure-docker

This command updates your Docker configuration to include credentials for GCR, allowing you to pull and push images.

3. Add a New Registry in ODIN Fleet​

Navigate to "Settings" in the ODIN Fleet dashboard after selecting/creating your app. In Settings, navigate to the " Docker Registries" tab.

Click the "Add Registry" button and select Custom from the options.

4. Provide Required Information​

Add Google Cloud Registry

Enter the following details to establish a connection with your Google Cloud Container Registry:

  • Name: Enter a name for this registry connection.
  • Registry URL: Use the GCR registry URL format, which is typically https://gcr.io or a specific regional URL like https://us.gcr.io, https://eu.gcr.io, or https://asia.gcr.io.
  • Username: Use _json_key or oauth2accesstoken.
  • Password: Provide the base64-encoded JSON key file content if using _json_key or the OAuth2 access token if using oauth2accesstoken.

Example setup:

  • Registry URL: https://gcr.io
  • Username: _json_key
  • Password: (Paste the base64-encoded content of your service account key file)

Or using OAuth2 access token:

  • Registry URL: https://gcr.io
  • Username: oauth2accesstoken
  • Password: (Your OAuth2 access token)

5. Save the Configuration​

After entering the necessary details, click "Save" to complete the integration.

Limitations and Warnings​

Since this is done via the Custom option, the following limitations apply:

  • No URL Validation: The provided URL will not be checked for validity or corrected.
  • No Image Verification: Image existence checks are skipped, meaning ODIN Fleet will not verify if the images exist in the registry.
  • No Image Browsing: Tagged images will not be retrieved, resulting in an empty list of available images for selection.
  • Error Handling: If an image cannot be pulled, it will be marked with a status error, but further details may not be provided.