# Pushing a Helm chart to a public repository in Amazon ECR public
<a name="push-oci-artifact"></a>

Amazon ECR Public supports pushing Open Container Initiative (OCI) artifacts to your public repositories. To display this functionality, use the following steps to push a Helm chart to Amazon ECR Public.

**To push a Helm chart to an Amazon ECR public repository**

1. Install Helm version `3.8.0` or higher of the Helm client. These steps were written using Helm version `3.8.0`. For more information, see [Installing Helm](https://helm.sh/docs/intro/install/).

1. Use the following steps to create a test Helm chart. For more information, see [Helm Docs - Getting Started](https://helm.sh/docs/chart_template_guide/getting_started/).

   1. Create a Helm chart named `helm-test-chart` and clear the contents of the `templates` directory.

      ```
      helm create helm-test-chart
      rm -rf ./helm-test-chart/templates/*
      ```

   1. Create a ConfigMap in the `templates` folder.

      ```
      cd helm-test-chart/templates
      cat <<EOF > configmap.yaml
      apiVersion: v1
      kind: ConfigMap
      metadata:
        name: helm-test-chart-configmap
      data:
        myvalue: "Hello World"
      EOF
      ```

1. Package the chart. The output will contain the filename of the packaged chart which you use when pushing the Helm chart.

   ```
   cd ..
   helm package helm-test-chart
   ```

   Output

   ```
   Successfully packaged chart and saved it to: /Users/username/helm-test-chart-0.1.0.tgz
   ```

1. Create a public repository to store your Helm chart. For more information, see [Creating an Amazon ECR public repository to store images](public-repository-create.md).

   ```
   aws ecr-public create-repository \
        --repository-name helm-test-chart \
        --region us-east-1
   ```

1. Authenticate your Helm client to the Amazon ECR public registry to which you intend to push your Helm chart. Authentication tokens are valid for 12 hours. For more information, see [Registry authentication in Amazon ECR public](public-registry-auth.md).

   ```
   aws ecr-public get-login-password \
        --region us-east-1 | helm registry login \
        --username AWS \
        --password-stdin public.ecr.aws
   ```

1. Push the Helm chart using the **helm push** command. The output should include the Amazon ECR repository URI and SHA digest.

   ```
   helm push helm-test-chart-0.1.0.tgz oci://public.ecr.aws/registry_alias
   ```

1. Describe your Helm chart.

   ```
   aws ecr-public describe-images \
        --repository-name helm-test-chart \
        --region us-east-1
   ```

   ```
   {
       "imageDetails": [
           {
               "registryId": "aws_account_id",
               "repositoryName": "helm-test-chart",
               "imageDigest": "sha256:f23ab9dc0fda33175e465bd694a5f4cade93eaf62715fa9390d9fEXAMPLE",
               "imageTags": [
                   "0.1.0"
               ],
               "imageSizeInBytes": 1636,
               "imagePushedAt": "2022-06-01T12:17:39-05:00",
               "imageManifestMediaType": "application/vnd.oci.image.manifest.v1+json"
           }
       ]
   }
   ```