Docker Registry

Create a docker image repository in GCP's Artifact Registry service and push an image to it.

These steps are written as an example for the qa-gcp3 project using the us-east1 location.

Prerequisites

1. Install Docker.

2. Install and configure the gcloud CLI.

3. Run gcloud info and confirm it shows your email address and GCP project.

Create the Repository

Navigate to Repositories in the Artifact Registry service in the GCP UI and create a repository:

• Type: Docker

• Mode: Standard

• Location: Unless you know you need multiple regions, use the same region as your Duplo portal.

• Encryption: Google-managed encryption key

• Immutable tags: Enabled (this isn't required, but it's a common good practice)

• Cleanup policies: Dry run

Creating a repository

Copy the repo path from its page in the UI. You'll need this to tag the image you build later. The path will look similar to this:

us-east1-docker.pkg.dev/qa-gcp3/testrepo

Finding the repository path

Build and Push an Image

Now you can tag and push any image you build. On some platforms (like Apple M1 laptops), you may need to specify a build architecture.

1. Authenticate Docker with GCP: gcloud auth configure-docker us-east1-docker.pkg.dev

2. Build an image: docker build --platform linux/amd64 . -t testimage:amd64

3. Add a tag to the image that includes the repo path from above: docker tag testimage:amd64 us-east1-docker.pkg.dev/qa-gcp3/testrepo/testimage:amd64 (Alternatively, you can add this tag with -t flags in the build step.)

4. Push the image: docker push us-east1-docker.pkg.dev/qa-gcp3/testrepo/testimage:amd64

The image tag should now show up in the GCP UI:

Viewing the image in the repository

Use the Image in DuploCloud

Reference the image tag you just pushed in the Docker Image field of any DuploCloud service running in the same GCP account.

Use the full path and tag (the arguments to the push command), like this:

us-east1-docker.pkg.dev/qa-gcp3/testrepo/testimage:amd64

Using the image in a DuploCloud service