Build an application with buildpacks

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This guide shows you how to use buildpacks with your application source code to create a container image. For example, use buildpacks to build the source code of your Cloud Run service into a container image.

There are two methods for building container images with buildpacks:

  • Build locally with the pack CLI to locally test your application and rapidly prototype changes before deployment.
  • Build remotely with Cloud Build. Building with Cloud Build is useful for large applications that have a resource-intensive build processes and can also help protect your software supply chain.

Local builds

You use the pack CLI to locally build your application into a container image.

Before you begin

  1. Install Docker Community Edition (CE) on your workstation. Docker is used by pack as an OCI image builder.
  2. Install Pack CLI.
  3. Install the Git source control tool to fetch the sample application from GitHub.

Build an application locally

You use the pack build command and specify the default builder --builder=gcr.io/buildpacks/builder to build your container images locally.

pack build --builder=gcr.io/buildpacks/builder IMAGE_NAME

Replace IMAGE_NAME with the name of your service's container image.

You can also customize your container image by extending the build and run images.

Build a sample application locally

The following examples demonstrate how to build a sample locally.

  1. Clone the sample repository to your local machine:
    git clone https://github.com/GoogleCloudPlatform/buildpack-samples.git
  2. Change to the directory that contains the application sample code:

    Go

    cd buildpack-samples/sample-go

    Java

    cd buildpack-samples/sample-java-gradle

    Node.js

    cd buildpack-samples/sample-node

    PHP

    cd buildpack-samples/sample-php

    Python

    cd buildpack-samples/sample-python

    Ruby

    cd buildpack-samples/sample-ruby

    .NET

    cd buildpack-samples/sample-dotnet
  3. Use pack to build the sample application image:

    Go

    pack build --builder=gcr.io/buildpacks/builder sample-go

    Java

    pack build --builder=gcr.io/buildpacks/builder sample-java-gradle

    Node.js

    pack build --builder=gcr.io/buildpacks/builder sample-node

    PHP

    pack build --builder=gcr.io/buildpacks/builder sample-php

    Python

    pack build --builder=gcr.io/buildpacks/builder sample-python

    Ruby

    pack build --builder=gcr.io/buildpacks/builder sample-ruby

    .NET

    pack build --builder=gcr.io/buildpacks/builder sample-dotnet
  4. Run the image using docker:

    Go

    docker run -p8080:8080 sample-go

    Java

    docker run -it -ePORT=8080 -p8080:8080 sample-java-gradle

    Node.js

    docker run -it -ePORT=8080 -p8080:8080 sample-node

    PHP

    docker run -it --rm -p 8080:8080 sample-php

    Python

    docker run -it -ePORT=8080 -p8080:8080 sample-python

    Ruby

    docker run -it -ePORT=8080 -p8080:8080 sample-ruby

    .NET

    docker run -it -ePORT=8080 -p8080:8080 sample-dotnet
  5. Visit the running application by browsing to localhost:8080.

Remote builds

Use Cloud Build to build your application into a container image and Artifact Registry as the container repository from where you store and deploy each image.

Before you begin

  1. Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.
  2. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

    Go to project selector

  3. Make sure that billing is enabled for your Cloud project. Learn how to check if billing is enabled on a project.

  4. Enable the Cloud Build and Artifact Registry APIs.

    Enable the APIs

  5. Install and initialize the Google Cloud CLI.
  6. In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

    Go to project selector

  7. Make sure that billing is enabled for your Cloud project. Learn how to check if billing is enabled on a project.

  8. Enable the Cloud Build and Artifact Registry APIs.

    Enable the APIs

  9. Install and initialize the Google Cloud CLI.
  10. Ensure that your Cloud project has access to a container image repository.

    To configure access to a Docker repository in Artifact Registry:

    1. Create a new Docker repository in the same location of your Cloud project.
      gcloud artifacts repositories create REPO_NAME \
      --repository-format=docker \
      --location=REGION --description="DESCRIPTION"
      
      Replace:
      • REPO_NAME with the name that you choose for your Docker repository.
      • REGION with the location in or nearest to the location of your Cloud project.
      • DESCRIPTION with a description of your choice.

      For example, to create a docker repository in us-west2 with the description "Docker repository", you run:

      gcloud artifacts repositories create buildpacks-docker-repo --repository-format=docker \
      --location=us-west2 --description="Docker repository"
      
    2. Verify that your repository was created:
      gcloud artifacts repositories list
      

      You should see name that you choose for your Docker repository in the list.

Build an application remotely

You use the gcloud builds command and image flag to build and upload your container image to your repository:

gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/IMAGE_NAME

Replace:

  • LOCATION with the region name of your container repository. Example: us-west2
  • PROJECT_ID with the ID of your Cloud project.
  • REPO_NAME with the name of your Docker repository.
  • IMAGE_NAME with the name of your container image.

Example:

gcloud builds submit --pack image=us-west2-docker.pkg.dev/my-project-id/my-buildpacks-docker-repo

Build a sample application remotely

The following examples demonstrate how to build a sample remotely and then verify that the container image was pushed to your repository in Artifact Registry.

  1. Clone the sample repository to your local machine:
    git clone https://github.com/GoogleCloudPlatform/buildpack-samples.git
  2. Change to the directory that contains the application sample code:

    Go

    cd buildpack-samples/sample-go

    Java

    cd buildpack-samples/sample-java-gradle

    Node.js

    cd buildpack-samples/sample-node

    PHP

    cd buildpack-samples/sample-php

    Python

    cd buildpack-samples/sample-python

    Ruby

    cd buildpack-samples/sample-ruby

    .NET

    cd buildpack-samples/sample-dotnet
  3. Use gcloud to submit the application source code to Cloud Build:

    Go

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-go

    Java

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-java-gradle

    Node.js

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-node

    PHP

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-php

    Python

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-python

    Ruby

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-ruby

    .NET

    gcloud builds submit --pack image=LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME/sample-dotnet
  4. Verify that the sample application was successfully published to REPO_NAME:
    gcloud artifacts docker images list LOCATION-docker.pkg.dev/PROJECT_ID/REPO_NAME

    Replace:

    • LOCATION with the region name of your container repository. Example: us-west2
    • PROJECT_ID with the ID of your Cloud project.
    • REPO_NAME with the name of your Docker repository.

What's Next