[Release-1.28] Add trivy scanning to PR reports (#6835)

* Add trivy scanning to PR reports (#6806)

* Add trivy GHA workflow for scanning rke2-runtime image

* Breakup trivy scan into isolated jobs

Signed-off-by: Derek Nola <[email protected]>

.github/workflows/trivy.yaml

@@ -0,0 +1,116 @@
+name: PR Comment Triggered Trivy Scan
+
+on:
+  issue_comment:
+    types: [created]
+
+jobs:
+  trivy_scan:
+    if: github.event.issue.pull_request && github.event.comment.body == '/trivy' && github.event.issue.state == 'open'
+    runs-on: runs-on,runner=8cpu-linux-x64,run-id=${{ github.run_id }}
+    permissions:
+      pull-requests: read
+    steps:
+    - name: Check if comment author is a public member of rancher organization
+      uses: actions/github-script@v7
+      with:
+        # Catch 404 errors if user is not a member of the organization
+        # 302 is expected as the GHA is not a member of the organization
+        # Users must be set their membership to public for this to work
+        # https://github.com/orgs/rancher/people
+        script: |
+          const org = context.repo.owner;
+          const username = context.payload.comment.user.login;
+          try {
+            const result = await github.rest.orgs.checkMembershipForUser({
+              org,
+              username,
+            });
+          } catch (error) {
+            core.setFailed(`User ${username} is not an public member of the ${org} organization`);
+          }
+    
+    - name: Checkout PR code
+      uses: actions/checkout@v4
+      with:
+        ref: refs/pull/${{ github.event.issue.number }}/head
+
+    # We don't care about the go version, as we only use it to capture ENV vars
+    - name: Install Go
+      uses: ./.github/actions/setup-go
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build RKE2 Image
+      id: build-image
+      run: |
+        SKIP_WINDOWS=true make build-image-runtime
+        TAG=$(docker images --format "{{.Repository}}:{{.Tag}} {{.CreatedAt}}" | grep "rancher/rke2-runtime" | sort -k2 -r | head -n1 | awk '{print $1}')
+        echo "TAG=${TAG}" >> "$GITHUB_OUTPUT"
+
+    - name: Run Trivy on image
+      uses: aquasecurity/[email protected]
+      with:
+        image-ref: '${{ steps.build-image.outputs.TAG }}'
+        format: 'table'
+        severity: "HIGH,CRITICAL"
+        output: "trivy-image-report.txt"
+
+    - name: Run Trivy on filesystem
+      uses: aquasecurity/[email protected]
+      with:
+        scan-type: 'fs'
+        scan-ref: '.'
+        severity: "HIGH,CRITICAL"
+        output: "trivy-fs-report.txt"
+
+    - name: Upload Trivy Reports
+      uses: actions/upload-artifact@v4
+      with:
+        name: trivy-report
+        path: |
+          trivy-image-report.txt
+          trivy-fs-report.txt
+        retention-days: 2
+        if-no-files-found: error
+
+  trivy_report:
+    needs: trivy_scan
+    runs-on: runs-on,runner=8cpu-linux-x64,run-id=${{ github.run_id }}
+    permissions:
+      pull-requests: write
+    env:
+      GH_TOKEN: ${{ github.token }}
+      GH_REPO: ${{ github.repository }}
+    steps:
+      - name: Download Trivy Report
+        uses: actions/download-artifact@v4
+        with:
+          name: trivy-report
+
+      - name: Add Trivy Report to PR
+        run: |
+          cat trivy-image-report.txt trivy-fs-report.txt > trivy-report.txt
+          if [ -s trivy-report.txt ] && [ -n "$(grep -v '^\s*$' trivy-report.txt)" ]; then
+            echo '```' | cat - trivy-report.txt > temp && mv temp trivy-report.txt
+            echo '```' >> trivy-report.txt
+            gh issue comment ${{ github.event.issue.number }} -F trivy-report.txt
+          else
+            echo ':star2: No High or Critical CVEs Found :star2:' > trivy-report.txt
+            gh issue comment ${{ github.event.issue.number }} -F trivy-report.txt
+          fi
+  
+  trivy_failure:
+    needs: trivy_scan
+    runs-on: runs-on,runner=8cpu-linux-x64,run-id=${{ github.run_id }}
+    if: always() && needs.trivy_scan.result == 'failure'
+    permissions:
+      pull-requests: write
+    env:
+      GH_TOKEN: ${{ github.token }}
+      GH_REPO: ${{ github.repository }}
+    steps:
+      - name: Report Failure
+        run: |
+          gh issue comment ${{ github.event.issue.number }} -b ":x: Trivy scan action failed, check logs :x:"

scripts/build-image-runtime

@@ -18,7 +18,7 @@ DOCKER_BUILDKIT=${DOCKER_BUILDKIT:-1} docker image build \
     --file Dockerfile \
     .
 
-if [ "${GOARCH}" != "s390x" ] && [ "${GOARCH}" != "arm64" ]; then
+if [ "${GOARCH}" != "s390x" ] && [ "${GOARCH}" != "arm64" ] && [ -z "$SKIP_WINDOWS" ]; then
   DOCKER_BUILDKIT=${DOCKER_BUILDKIT:-1} docker image build \
       --build-arg TAG=${VERSION} \
       --build-arg KUBERNETES_VERSION=${KUBERNETES_VERSION} \