Support trivy allow lists per image

Author: assumptionsandg

.github/workflows/stackhpc-container-image-build.yml

@@ -145,6 +145,10 @@ jobs:
         run: |
           curl -sfL https://raw.githubusercontent.com/aquasecurity/trivy/main/contrib/install.sh | sudo sh -s -- -b /usr/local/bin v0.49.0
 
+      - name: Install yq
+        run: |
+          curl -sL https://github.com/mikefarah/yq/releases/download/v4.42.1/yq_linux_amd64.tar.gz | tar xz && sudo mv yq_linux_amd64 /usr/bin/yq
+
       - name: Install Kayobe
         run: |
           mkdir -p venvs &&

etc/kayobe/trivy/allowed-vulnerabilities.yml

@@ -0,0 +1,21 @@
+---
+###############################################################################
+# Trivy allowed vulnerabilities list
+
+# Example allowed vulnerabilities file setup
+#
+# keystone_allowed_vulnerabilities:
+#   - CVE-2022-2447
+#
+# barbican-api_allowed_vulnerabilities:
+#   - CVE-2023-31047
+
+horizon_allowed_vulnerabilities:
+  - CVE-2022-28346
+  - CVE-2022-28347
+  - CVE-2022-34265
+  - CVE-2023-31047
+
+###############################################################################
+# Dummy variable to allow Ansible to accept this file.
+workaround_ansible_issue_8743: yes

tools/scan-images.sh

@@ -34,14 +34,22 @@ touch image-scan-output/clean-images.txt image-scan-output/dirty-images.txt
 # generate a csv summary
 for image in $images; do
   filename=$(basename $image | sed 's/:/\./g')
+  imagename=$(echo $filename | cut -d "." -f 1)
+  vulnerabilities=$(yq .$imagename'_allowed_vulnerabilities[]' src/kayobe-config/etc/kayobe/trivy/allowed-vulnerabilities.yml)
+  rc=$?
+  rm .trivyignore && touch .trivyignore
+  for vulnerability in $vulnerabilities; do
+    if [ $rc -eq 0 ]; then
+        echo $vulnerability >> .trivyignore;
+    fi
+  done
   if $(trivy image \
-          --quiet \
+          --debug \
           --exit-code 1 \
           --scanners vuln \
           --format json \
-          --severity HIGH,CRITICAL \
+          --severity CRITICAL \
           --output image-scan-output/${filename}.json \
-          --ignore-unfixed \
           $image); then
     # Clean up the output file for any images with no vulnerabilities
     rm -f image-scan-output/${filename}.json