About

GitHub Action to run the Docker Scout CLI as part of your workflows.

You can pick one of the following commands to run:

• quickview: get a quick overview of an image, base image and available recommendations
• compare: compare an image to a second one (for instance to latest)
• cves: display vulnerabilities of an image
• recommendations: display available base image updates and remediation recommendations
• sbom: generate the SBOM of the image
• environment: record an image to an environment
• attestation-add: add attestation to an existing image

Inputs

Command

You can run one or multiple commands in the same GitHub Action run. Use a comma separated list to run several commands.

command	required	string	Single command to run or comma separated list of commands to run in order. Possible values: quickview compare cves recommendations sbom environment

The commands will be run in the order of the value, and will share the same parameters.

For instance, if you built an image and want to display a quickview as well as to compare it against the latest indexed one, set the action as following:

command: quickview,compare
image: ${{ steps.meta.outputs.tags }}
to-latest: true

Authentication

Login to Docker Hub

To use scout features you need to be authenticated against Docker Hub.

You can use the parameters below to authenticate, or you can use the docker/login-action.

dockerhub-user	optional	string	Docker Hub user id
dockerhub-password	optional	string	Docker Hub password or PAT

Login to a registry to pull private images (non Docker Hub)

registry-user	required to pull from other private registry	string	Registry user id to pull images
registry-password	required to pull from other private registry	string	Registry password or PAT to pull images

Common Inputs

Image

image	optional (*)	string	Prefixed name of the image, directory or archive to operate on
platform	optional current platform by default	string	Platform of the image to analyze (or the current platform)
ref	optional default is empty	string	Reference to use if the provided tarball containers multiple images, only with archives

(*) If image is not set (or empty) the most recently built image, if any, will be used instead.

Prefix

The image field can be prefixed to indicate the type of content to analyse. If no prefix is set, the image:// prefix is used.

Available prefixes:

• image://: optional prefix, the target is an image that first will be resolved locally then, if not found, will be resolved to the associated registry
• local://: only resolve the image from the local image store
• registry://: do not use the local image store, only use the registry
• oci-dir://: local directory to be read as an OCI directory
• archive://: image archive generated by docker save command, as a tar file
• fs://: local directory or file
• sbom:// SPDX file or in-toto attestation file with SPDX predicate or syft json SBOM file

Organization namespace

Namespace of the Docker Organization is required to match the query with the right data.

When using environments (for instance to compare an image to the one from a defined environment, or when comparing to the latest indexed) organization parameter is required.

organization	required to compare to environments/latest indexed required to manage environments optional in other cases, default empty	string	Namespace of the Docker organization

Step Summary

By default the Markdown output of the command (if supported) will be displayed as a Job Summary. This can be disabled if needed.

summary	optional default is true	boolean	Display output as Job Summary

Pull Request Comments

When triggered by a pull_request event, the output of the scout command can be written as a comment.

This behaviour is enabled by default.

By default one single comment per job step will be kept and updated at each run. If you prefer to keep previous comments but hide them, set the keep-previous-comments parameter to true.

pull-requests: write permission is required to allow the GitHub action to create the comment.

github-token	optional default is github.token	string	GitHub Token to create the comment
write-comment	optional default is true	boolean	Boolean, write a comment with scout output
keep-previous-comments	optional default is false	boolean	If set, keep but hide previous comment. If not set, keep and update one single comment per job

Output

The text version of the command output will be displayed in the logs. The markdown version (if exists) of the command output will be set as an output of the step, using the command name as identifier, and will be displayed as Pull Request comment or Step Summary.

compare Inputs

Compare to an image

to	required	string	Prefixed name of the image, directory or archive to compare with
to-ref	optional default is empty	string	Reference to use if the provided tarball containers multiple images, only with archives

See Prefix above about the available prefixes for the to argument.

Compare to an environment

to-env	(*)	string	Name of the environment to compare with
to-stream	deprecated (*)	string	Name of the stream to compare with
to-latest	(*)	boolean	Compare to latest indexed image

(*) One and only one needs to be defined.

Common Inputs

ignore-unchanged	optional default is false	boolean	Filter out unchanged packages
only-severities	optional default is empty (all severities)	string	Comma separated list of severities (critical, high, medium, low, unspecified) to filter CVEs by
only-package-types	optional default is empty (all types)	string	Comma separated list of package types (like apk, deb, rpm, npm, pypi, golang, etc)
only-fixed	optional default is false	boolean	Filter to fixable CVEs
only-unfixed	optional default is false	boolean	Filter to unfixed CVEs
only-cisa-kev	optional default is false	boolean	Filter to CVEs listed in the CISA Known Exploited Vulnerabilities catalog
exit-code	optional default is false	boolean	Return exit code 2 if vulnerability changes are detected
exit-on	optional default is empty	string	"(compare only) Comma separated list of conditions to fail the action step if worsened, options are: vulnerability, policy"

cves Inputs

only-severities	optional default is empty (all severities)	string	Comma separated list of severities (critical, high, medium, low, unspecified) to filter CVEs by
only-package-types	optional default is empty (all types)	string	Comma separated list of package types (like apk, deb, rpm, npm, pypi, golang, etc)
only-fixed	optional default is false	boolean	Filter to fixable CVEs
only-unfixed	optional default is false	boolean	Filter to unfixed CVEs
ignore-base	optional default is false	boolean	Ignore base image vulnerabilities
sarif-file	optional default is empty (no output file)	string	Write output to a SARIF file for further processing or upload into GitHub code scanning
only-vex-affected	optional default is false	boolean	Filter out CVEs that are marked not affected by a VEX statement
vex-author	optional default is empty	string	List of VEX statement authors to accept
vex-location	optional default is empty	string	File location of directory or file containing VEX statement

sbom Inputs

format	optional default is json	string	Format of the SBOM to generate (json, list, spdx, cyclonedx)
output	optional default is empty	string	Path of the output file to write the SBOM
secrets	optional default is false	boolean	Path of the output file to write the SBOM

recommendations Inputs

only-refresh	optional default is false	boolean	Only display base image refresh recommendations
only-update	optional default is false	boolean	Only display base image update recommendations

environment Inputs

The image input must be an image in your local image store or in a registry. You can use prefixes to control whether to use a local or remote image. The following prefixes are supported:

• image:// (optional)
• local://
• registry://

environment	required	string	Name of the environment to record the image

See Environment example

attestation-add Inputs

tags	optional default is empty	string	Additional tags for the attestation
file	optional default is empty	string	File path to the attestation file
predicate-type	optional default is empty	string	Predicate type of the attestation
referrer	optional default is false	boolean	Store attestations in Docker Scout

Example usage

Build an image, push and compare

name: Docker

on:
  push:
    tags: [ "*" ]
    branches:
      - 'main'
  pull_request:
    branches: [ "**" ]

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: docker.io
  IMAGE_NAME: ${{ github.repository }}
  SHA: ${{ github.event.pull_request.head.sha || github.event.after }}
  # Use `latest` as the tag to compare to if empty, assuming that it's already pushed
  COMPARE_TAG: latest

jobs:
  build:

    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      pull-requests: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          ref: ${{ env.SHA }}

      - name: Setup Docker buildx
        uses: docker/[email protected]
        with:
          driver-opts: |
            image=moby/buildkit:v0.10.6

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/[email protected]
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.DOCKER_USER }}
          password: ${{ secrets.DOCKER_PAT }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/[email protected]
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          labels: |
            org.opencontainers.image.revision=${{ env.SHA }}
          tags: |
            type=edge,branch=$repo.default_branch
            type=semver,pattern=v{{version}}
            type=sha,prefix=,suffix=,format=short

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/[email protected]
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Docker Scout
        id: docker-scout
        if: ${{ github.event_name == 'pull_request' }}
        uses: docker/scout-action@v1
        with:
          command: compare
          image: ${{ steps.meta.outputs.tags }}
          to: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.COMPARE_TAG }}
          ignore-unchanged: true
          only-severities: critical,high
          write-comment: true
          github-token: ${{ secrets.GITHUB_TOKEN }} # to be able to write the comment

All-in-one

For the latest built image, display:

• the vulnerabilities (ignoring the base image, only displaying vulnerabilities with a fix available)
• the available recommendations
• compare it to the latest image indexed for the same repository (only displaying unchanged packages and vulnerabilities that already have a fix)

        - name: Docker Scout
          id: docker-scout
          uses: docker/scout-action@v1
          with:
            command: cves,recommendations,compare
            to-latest: true
            ignore-base: true
            ignore-unchanged: true
            only-fixed: true

Analyze vulnerabilities and upload report to GitHub code scanning

When GitHub code scanning is enabled, the sarif-file input can be used to upload the vulnerabilities to GitHub.

      - name: Analyze for critical and high CVEs
        id: docker-scout-cves
        if: ${{ github.event_name != 'pull_request_target' }}
        uses: docker/scout-action@v1
        with:
          command: cves
          image: ${{ steps.meta.outputs.tags }}
          sarif-file: sarif.output.json
          summary: true

      - name: Upload SARIF result
        id: upload-sarif
        if: ${{ github.event_name != 'pull_request_target' }}
        uses: github/codeql-action/upload-sarif@v2
        with:
          sarif_file: sarif.output.json

Record an image deployed to an environment

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/[email protected]
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      - name: Docker Scout
        id: docker-scout-environment
        uses: docker/scout-action@v1
        with:
          command: environment
          image: ${{ steps.meta.outputs.tags }}
          environment: prod
          organization: my-docker-org

License

The Docker Scout CLI is licensed under the Terms and Conditions of the Docker Subscription Service Agreement.