Docker Alpine image with Google Container Structure Test for validating container images.
This Docker image provides a lightweight Container Structure Test installation on Alpine Linux. It enables automated validation of Docker images by testing their structure, contents, and behavior without needing to run them.
- Small footprint: Minimal Alpine Linux base image
- Container Structure Test v1.19.3: Latest stable version
- Docker-in-Docker support: Can test images using the Docker socket
- Multi-platform: Supports linux/amd64 and linux/arm64
- Ready-to-use: Pre-configured for immediate testing
docker build -t ragedunicorn/container-test .The container uses Container Structure Test as the entrypoint, allowing you to validate Docker images by testing their structure, contents, and behavior.
# Test an image with a single test file
docker run -v /var/run/docker.sock:/var/run/docker.sock -v $(pwd)/test:/test \
ragedunicorn/container-test:latest --image nginx:latest --config /test/nginx_test.yml
# Run all tests using Docker Compose
docker compose -f docker-compose.test.yml run test-allFor comprehensive testing documentation including examples, troubleshooting, and CI/CD integration, see TEST.md.
For information about developing and contributing to this project, see DEVELOPMENT.md.
This project uses semantic versioning that matches the Docker image contents:
Format: {container-structure-test_version}-alpine{alpine_version}-{build_number}
Examples:
1.19.3-alpine3.22.1-1- Container Structure Test 1.19.3 on Alpine 3.22.1, build 1latest- Most recent stable release
For detailed release process and versioning guidelines, see RELEASE.md.
This project uses Renovate to automatically check for updates to:
- Alpine Linux base image version (all major, minor, and patch updates)
- Container Structure Test version
Renovate runs weekly (every Monday) and creates pull requests when updates are available. The configuration tracks both Alpine Linux and Container Structure Test releases, creating separate pull requests for each update.
MIT License
Copyright (c) 2025 Michael Wiesendanger
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.