BC-8372 - trivy use cache for DBs (#3538)

.github/workflows/push.yml

@@ -141,13 +141,17 @@ jobs:
         security-events: write
     steps:
       - name: run trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@1f6384b6ceecbbc6673526f865b818a2a06b07c9
+        uses: aquasecurity/trivy-action@915b19bbe73b92a6cf82a1bc12b087c9a19a5fe2
         with:
           image-ref: 'ghcr.io/${{ github.repository }}-default:${{ needs.branch_meta.outputs.sha }}'
           format: 'sarif'
           output: 'trivy-results.sarif'
           severity: 'CRITICAL,HIGH'
           ignore-unfixed: true
+          scan-type: 'image'
+        env:
+          TRIVY_SKIP_DB_UPDATE: true
+          TRIVY_SKIP_JAVA_DB_UPDATE: true
       - name: upload trivy results
         if: ${{ always() }}
         uses: github/codeql-action/upload-sarif@v3

.github/workflows/trivy.yml

@@ -0,0 +1,39 @@
+# Note: This workflow only updates the cache. You should create a separate workflow for your actual Trivy scans.
+# In your scan workflow, set TRIVY_SKIP_DB_UPDATE=true and TRIVY_SKIP_JAVA_DB_UPDATE=true.
+name: Update Trivy Cache
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # Run daily at midnight UTC
+  workflow_dispatch:  # Allow manual triggering
+
+jobs:
+  update-trivy-db:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup oras
+        uses: oras-project/setup-oras@v1
+
+      - name: Get current date
+        id: date
+        run: echo "date=$(date +'%Y-%m-%d')" >> $GITHUB_OUTPUT
+
+      - name: Download and extract the vulnerability DB
+        run: |
+          mkdir -p $GITHUB_WORKSPACE/.cache/trivy/db
+          oras pull ghcr.io/aquasecurity/trivy-db:2
+          tar -xzf db.tar.gz -C $GITHUB_WORKSPACE/.cache/trivy/db
+          rm db.tar.gz
+
+      - name: Download and extract the Java DB
+        run: |
+          mkdir -p $GITHUB_WORKSPACE/.cache/trivy/java-db
+          oras pull ghcr.io/aquasecurity/trivy-java-db:1
+          tar -xzf javadb.tar.gz -C $GITHUB_WORKSPACE/.cache/trivy/java-db
+          rm javadb.tar.gz
+
+      - name: Cache DBs
+        uses: actions/cache/save@v4
+        with:
+          path: ${{ github.workspace }}/.cache/trivy
+          key: cache-trivy-${{ steps.date.outputs.date }}