Note: Codespaces is currently in limited public beta and subject to change. For more information about joining the beta, see "About Codespaces."
A registry is a secure space for storing and managing private container images, such as Azure Container Registry or DockerHub. You can create secrets in GitHub to store the access details for a private registry and use them to give your codespace access to images stored in the registry.
When you launch a codespace, Codespaces checks for three secrets, which define the server name, username, and personal access token (PAT) for a container registry. If these secrets are found, Codespaces will make the registry available inside your codespace.
<*>_CONTAINER_REGISTRY_SERVER<*>_CONTAINER_REGISTRY_USER<*>_CONTAINER_REGISTRY_PASSWORD
You can store secrets at the user, repository, or organization-level, allowing you to share them securely between different codespaces. When you create a set of secrets for a private image registry, you need to replace the “<*>” in the name with a consistent identifier. For more information, see "Managing encrypted secrets for your codespaces" and "Managing encrypted secrets for your repository and organization for Codespaces."
For example, if you had a private image registry in Azure, you could create the following secrets:
ACR_CONTAINER_REGISTRY_SERVER = mycompany.azurecr.io
ACR_CONTAINER_REGISTRY_USER = acr-user-here
ACR_CONTAINER_REGISTRY_PASSWORD = <PAT>
