Docker Registry

Set up a Docker Registry image repository

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

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.

Creating the Repository

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

1. Navigate Google Cloud Console and create a repository with the following inputs:

• 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

1. Copy the repo path from the Google UI. This will be used to tag the image later. The path will look similar to this: us-east1-docker.pkg.dev/qa-gcp3/testrepo.

Finding the repository path

Building and Pushing 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

5. The image tag displays in the GCP UI:

Viewing the image in the repository

Using the Image in DuploCloud

Enter the image tag 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) as shown below.

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

Using the image in a DuploCloud service