Add SBOMs for Docker images

.github/workflows/ci.yml

@@ -31,6 +31,7 @@ jobs:
     steps:
       - name: Checkout Repository
         uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
+
       - name: Setup Golang Environment
         uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568 # v3.5.0
         with:
@@ -42,26 +43,30 @@ jobs:
   build-docker:
     name: Build Docker Image
     runs-on: ubuntu-22.04
-    needs: [unit-tests]
+    needs: unit-tests
     steps:
       - name: Checkout Repository
         uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
         with:
           fetch-depth: 0
+
       - name: Setup Golang Environment
         uses: actions/setup-go@6edd4406fa81c3da01a34fa6f6343087c207a568 # v3.5.0
         with:
           go-version-file: go.mod
           cache: true
+
       - name: Determine GOPATH
         id: go
         run: |
           echo "go_path=$(go env GOPATH)" >> $GITHUB_OUTPUT
       - name: Setup QEMU
+
         uses: docker/setup-qemu-action@e81a89b1732b9c48d79cd809d8d81d79c4647a18 # v2.1.0
         with:
           platforms: arm,arm64,ppc64le,s390x,mips64le,386
         if: github.event_name != 'pull_request'
+
       - name: Docker Buildx
         uses: docker/setup-buildx-action@f03ac48505955848960e80bbb68046aa35c7b9e7 # v2.4.1
       - name: DockerHub Login
@@ -70,27 +75,31 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
         if: github.event_name != 'pull_request'
+
       - name: Login to GitHub Container Registry
         uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
         if: github.event_name != 'pull_request'
+
       - name: Login to Public ECR
         uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
         with:
           registry: public.ecr.aws
           username: ${{ secrets.AWS_ACCESS_KEY_ID }}
           password: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
         if: github.event_name != 'pull_request'
+
       - name: Login to Quay.io
         uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a # v2.1.0
         with:
           registry: quay.io
           username: ${{ secrets.QUAY_USERNAME }}
           password: ${{ secrets.QUAY_ROBOT_TOKEN }}
         if: github.event_name != 'pull_request'
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@507c2f2dc502c992ad446e3d7a5dfbe311567a96 # v4.3.0
@@ -108,15 +117,18 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
           labels: |
             org.opencontainers.image.vendor=NGINX Inc <integrations@nginx.com>
+
       - name: Publish Release Notes
         uses: release-drafter/release-drafter@cfc5540ebc9d65a8731f02032e3d44db5e449fb6 # v5.22.0
         with:
             publish: true
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         if: ${{ startsWith(github.ref, 'refs/tags/') }}
+
       - name: Download Syft
         uses: anchore/sbom-action/download-syft@07978da4bdb4faa726e52dfc6b1bed63d4b56479 # v0.13.3
+
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@f82d6c1c344bcacabba2c841718984797f664a6b # v4.2.0
         with:
@@ -127,7 +139,8 @@ jobs:
           GOPATH: ${{ steps.go.outputs.go_path }}
           HOMEBREW_TAP_GITHUB_TOKEN: ${{ secrets.NGINX_PAT }}
           SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK_COMMUNITY }}
-      - name: Push to Dockerhub
+
+      - name: Build and Push Docker Image
         uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671 # v4.0.0
         with:
           file: build/Dockerfile
@@ -140,3 +153,5 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          provenance: false
+          sbom: ${{ github.event_name != 'pull_request' }}

README.md

@@ -341,6 +341,23 @@ The binary is built with the name `nginx-prometheus-exporter`.
 ## Grafana Dashboard
 The official Grafana dashboard is provided with the exporter for NGINX. Check the [Grafana Dashboard](./grafana/README.md) documentation for more information.
 
+## SBOM (Software Bill of Materials)
+
+We generate SBOMs for the binaries and the Docker image.
+
+### Binaries
+
+The SBOMs for the binaries are available in the releases page. The SBOMs are generated using [syft](https://github.com/anchore/syft) and are available in SPDX format.
+
+### Docker Image
+
+The SBOM for the Docker image is available in the [DockerHub](https://hub.docker.com/r/nginx/nginx-prometheus-exporter), [GitHub Container registry](https://github.com/nginxinc/nginx-prometheus-exporter/pkgs/container/nginx-prometheus-exporter), [Amazon ECR Public Gallery](https://gallery.ecr.aws/nginx/nginx-prometheus-exporter) and [Quay.io](https://quay.io/repository/nginx/nginx-prometheus-exporter) repositories. The SBOMs are generated using [syft](https://github.com/anchore/syft) and stored as an attestation in the image manifest.
+
+For example to retrieve the SBOM for `linux/amd64` from Docker Hub and analyze it using [grype](https://github.com/anchore/grype) you can run the following command:
+```
+$ docker buildx imagetools inspect nginx/nginx-prometheus-exporter:edge --format '{{ json (index .SBOM "linux/amd64").SPDX }}' | grype
+```
+
 ## Contacts
 
 We’d like to hear your feedback! If you have any suggestions or experience issues with the NGINX Prometheus Exporter, please create an issue or send a pull request on GitHub.

build/Dockerfile

@@ -1,4 +1,4 @@
-# syntax=docker/dockerfile:1.4
+# syntax=docker/dockerfile:1.5
 FROM golang:1.20 as base
 ARG VERSION
 ARG TARGETARCH