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release.yaml
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# yaml-language-server: $schema=https://json.schemastore.org/github-workflow.json
### This workflow uses the SLSA container provenance generator workflow
### (see https://github.com/slsa-framework/slsa-github-generator/blob/main/internal/builders/container/README.md)
### to generate a SLSA provenance type predicate for a container image built by ko and attesting to it and others
### using keyless signing.
name: release
on:
push:
tags:
- "*"
workflow_dispatch: {}
env:
REGISTRY: gcr.io/kubecost1
IMAGE_NAME: disk-autoscaler
jobs:
# Publish with ko build
build:
runs-on: ubuntu-latest
permissions:
packages: write
contents: read
id-token: write
outputs:
image: ${{ steps.ko-build.outputs.image }}
digest: ${{ steps.set-digest.outputs.digest }}
sbom-digest: ${{ steps.calculate-sbom-hash.outputs.sbom_digest }}
# Re-declaring the global env vars as outputs as a workaround for reusable workflows
REGISTRY: ${{ env.REGISTRY }}
IMAGE_NAME: ${{ env.IMAGE_NAME }}
steps:
- name: Checkout code
uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
- name: Setup Golang
uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
with:
go-version: 1.22
- name: Setup ko
run: go install github.com/google/ko@latest
- name: Authenticate to GCP
uses: google-github-actions/auth@v2
with:
workload_identity_provider: projects/416184586880/locations/global/workloadIdentityPools/integrations/providers/github-provider
service_account: [email protected]
- name: Setup gcloud
uses: google-github-actions/setup-gcloud@v2
with:
project_id: kubecost1
- name: gcloud auth configure-docker
run: |
gcloud --quiet auth configure-docker
- name: Publish image and SBOM (CycloneDX)
id: ko-build
# IMAGE will be in format <registry>/<org>/<repo>@<digest> ex ghcr.io/johndoe/redis@sha256:1b85db3f261af51914867eeda20a25bedf72fa406619bcdd60f0658f27b2722d
run: |
tag=$(echo ${{ github.ref }} | cut -c11-)
export VERSION=$tag
export COMMIT_HASH=${{ github.sha }}
IMAGE=$(ko build ./cmd/diskautoscaler --bare -t latest -t ${{ github.sha }} -t ${tag} --sbom=cyclonedx --sbom-dir=./)
echo "The image generated is: $IMAGE"
echo "## Image summary" >> $GITHUB_STEP_SUMMARY
echo "Built image: $IMAGE" >> $GITHUB_STEP_SUMMARY
echo "IMAGE=$IMAGE" >> $GITHUB_ENV
echo "image=$IMAGE" >> $GITHUB_OUTPUT
echo "Renaming output SBOM file to sbom.json."
for file in *.cyclonedx.json; do
mv -- "$file" "sbom.json"
break # Only rename the first file
done
env:
KO_DOCKER_REPO: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
- name: Set digest
id: set-digest
# DIGEST will be in format sha256:<hash> ex sha256:1b85db3f261af51914867eeda20a25bedf72fa406619bcdd60f0658f27b2722d
run: |
DIGEST=$(echo -n $IMAGE | cut -d '@' -f2)
echo "Digest from image is: $DIGEST"
echo "digest=$DIGEST" >> $GITHUB_OUTPUT
- name: Calculate SBOM file hash
id: calculate-sbom-hash
run: |
SBOM_DIGEST=$(sha256sum sbom.json | awk '{print $1}')
echo "sbom_digest=$SBOM_DIGEST" >> $GITHUB_OUTPUT
echo "Hash of sbom.json is: $SBOM_DIGEST"
- name: Upload SBOM
uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
with:
name: sbom.json
path: sbom.json
if-no-files-found: error
# Use the container SLSA provenance generator.
provenance:
permissions:
id-token: write
contents: write
actions: read
packages: write
needs: build
uses: slsa-framework/slsa-github-generator/.github/workflows/[email protected]
# Can't use env global vars in a reusable workflow. See https://github.com/actions/runner/issues/2372
with:
digest: "${{ needs.build.outputs.digest }}"
image: ${{ needs.build.outputs.REGISTRY }}/${{needs.build.outputs.IMAGE_NAME}}
gcp-workload-identity-provider: projects/416184586880/locations/global/workloadIdentityPools/integrations/providers/github-provider
gcp-service-account: [email protected]
# Scan the image using Trivy. Check the hash of the scan file to ensure no tampering between jobs.
scan:
runs-on: ubuntu-latest
needs: [provenance, build]
permissions:
contents: read
outputs:
scan-digest: ${{ steps.calculate-scan-hash.outputs.scan_digest }}
env:
IMAGE: "${{ needs.build.outputs.image }}"
steps:
- name: Scan for vulnerabilities
uses: aquasecurity/trivy-action@915b19bbe73b92a6cf82a1bc12b087c9a19a5fe2 # v0.20.0 (Trivy v0.51.1)
with:
image-ref: ${{ env.IMAGE }}
format: cosign-vuln
ignore-unfixed: true
output: scan.json
- name: Calculate scan file hash
id: calculate-scan-hash
run: |
SCAN_DIGEST=$(sha256sum scan.json | awk '{print $1}')
echo "scan_digest=$SCAN_DIGEST" >> $GITHUB_OUTPUT
echo "Hash of scan.json is: $SCAN_DIGEST"
- name: Upload vulnerability scan report
uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4.4.3
with:
name: scan.json
path: scan.json
if-no-files-found: error
# Uses Cosign to sign and attest the scan and SBOM. Uses keyless signing for all steps.
attest:
runs-on: ubuntu-latest
permissions:
contents: write
actions: read
packages: write
id-token: write # Needed for OIDC and keyless signing
env:
IMAGE: "${{ needs.build.outputs.image }}"
SCAN_DIGEST: "${{ needs.scan.outputs.scan-digest }}"
SBOM_DIGEST: "${{ needs.build.outputs.sbom-digest }}"
needs: [provenance, scan, build]
steps:
- name: Checkout code
uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
- name: Authenticate to GCP
uses: google-github-actions/auth@v2
with:
workload_identity_provider: projects/416184586880/locations/global/workloadIdentityPools/integrations/providers/github-provider
service_account: [email protected]
- name: Setup gcloud
uses: google-github-actions/setup-gcloud@v2
with:
project_id: kubecost1
- name: gcloud auth configure-docker
run: |
gcloud --quiet auth configure-docker
- name: Download files
uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
with:
merge-multiple: true
path: ./
# Detect potential tampering with the files by comparing the pre-upload digest in the previous
# job with the post-download digest in this job. Fail if there is a mismatch.
- name: Verify scan and SBOM files
run: |
set -euo pipefail
echo "Hash of scan.json should be: $SCAN_DIGEST"
COMPUTED_HASH=$(sha256sum scan.json | awk '{print $1}')
echo "The current computed hash for scan.json is: $COMPUTED_HASH"
echo "If the two above hashes don't match, scan.json has been tampered with."
echo "$SCAN_DIGEST scan.json" | sha256sum --strict --check --status || exit -2
echo "--------------------------------"
echo "Hash of sbom.json should be: $SBOM_DIGEST"
COMPUTED_HASH=$(sha256sum sbom.json | awk '{print $1}')
echo "The current computed hash for sbom.json is: $COMPUTED_HASH"
echo "If the two above hashes don't match, sbom.json has been tampered with."
echo "$SBOM_DIGEST sbom.json" | sha256sum --strict --check --status || exit -2
- name: Install Cosign
uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0
with:
cosign-release: v2.2.4
- name: Sign image
run: |
cosign sign -a sha=${{ github.sha }} -a run_id=${{ github.run_id }} -a repo=${{ github.repository }} -a workflow=${{ github.workflow }} ${{ env.IMAGE }} --output-signature=./signature.sig -y
echo "## Supply Chain Summary" >> $GITHUB_STEP_SUMMARY
echo "Image signed: :heavy_check_mark:" >> $GITHUB_STEP_SUMMARY
- name: Attest SBOM
run: |
cosign attest --predicate sbom.json --type cyclonedx ${{ env.IMAGE }} -y
echo "Image SBOM attested: :heavy_check_mark:" >> $GITHUB_STEP_SUMMARY
- name: Attest Scan
run: |
cosign attest --predicate scan.json --type vuln ${{ env.IMAGE }} -y
echo "Image vulnerability scan attested: :heavy_check_mark:" >> $GITHUB_STEP_SUMMARY
- name: Update install.yaml with new image
run: |
yq -i 'select(.kind=="Deployment") .spec.template.spec.containers[0].image = "${{ env.IMAGE }}"' manifests/install.yaml
- name: Add files to release assets
uses: softprops/action-gh-release@v2
with:
files: |
scan.json
sbom.json
signature.sig
manifests/install.yaml