trivy_image_check.yaml

name: Trivy images check

env:
  MODULES_MODULE_NAME: ${{ vars.MODULE_NAME }}
  MODULES_MODULE_SOURCE: ${{ vars.DEV_MODULE_SOURCE }}
  PR_NUMBER: ${{ github.event.pull_request.number }}
  MODULES_REGISTRY: ${{ vars.DEV_REGISTRY }}
  MODULES_REGISTRY_LOGIN: ${{ vars.DEV_MODULES_REGISTRY_LOGIN }}
  MODULES_REGISTRY_PASSWORD: ${{ secrets.DEV_MODULES_REGISTRY_PASSWORD }}

on:
  pull_request:

jobs:
  test:
    name: Trivy images check
    runs-on: [self-hosted, regular]

    steps:
      - uses: actions/checkout@v4
      - uses: deckhouse/modules-actions/setup@v1

      - name: Check and Install Latest Trivy
        run: |
          mkdir -p $HOME/bin

          LATEST_VERSION=$(curl -sL https://api.github.com/repos/aquasecurity/trivy/releases/latest | jq -r ".tag_name")
          CLEAN_VERSION=${LATEST_VERSION#v}

          INSTALL_TRIVY=true

          if [[ -f "$HOME/bin/trivy" ]]; then
            INSTALLED_VERSION=$("$HOME/bin/trivy" --version | grep -oE 'Version: [0-9]+\.[0-9]+\.[0-9]+' | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')
            if [ "$INSTALLED_VERSION" == "$CLEAN_VERSION" ]; then
              echo "Trivy is already up-to-date (version $INSTALLED_VERSION)."
              INSTALL_TRIVY=false
            else
              echo "Updating Trivy from version $INSTALLED_VERSION to $CLEAN_VERSION."
            fi
          else
            echo "Trivy is not installed. Installing version $CLEAN_VERSION."
          fi

          if [ "$INSTALL_TRIVY" = true ]; then
            wget https://github.com/aquasecurity/trivy/releases/download/$LATEST_VERSION/trivy_${CLEAN_VERSION}_Linux-64bit.tar.gz -O trivy.tar.gz
            tar zxvf trivy.tar.gz -C $HOME/bin
          fi

          echo "$HOME/bin" >> $GITHUB_PATH

      - name: Run Trivy vulnerability scanner in image mode
        run: |
          exit_code=0
          image_name=$MODULES_MODULE_SOURCE/$MODULES_MODULE_NAME
          image_name_with_tag=$MODULES_MODULE_SOURCE/$MODULES_MODULE_NAME:pr$PR_NUMBER
          
          crane_output=$(crane export $image_name_with_tag | tar -xOf - images_digests.json | jq -c 'to_entries[]')
          
          while read -r item; do
            key=$(echo "$item" | jq -r '.key')
            value=$(echo "$item" | jq -r '.value')

            echo 'Checking image '$key' '$value

            trivy image --quiet --config trivy-silent.yaml --format table $image_name@$value

            result=$(trivy image --quiet --config trivy-silent.yaml --format json $image_name@$value)

            vulnerabilities=$(echo "$result" | jq '[.Results[]? | select(has("Vulnerabilities")) | .Vulnerabilities | length] | add // 0')

            if [ "$vulnerabilities" -gt 0 ]; then
              echo "There are vulnerabilities in image"
              exit_code=1
            else
              echo "There are no vulnerabilities in image"
            fi
          done <<< "$crane_output"

          exit $exit_code