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Command line tools for container quality assurance

Project description

# Singularity Container Tools

These are tools for Singularity containers, optimized for using with continuous integration for security and quality checks. For an example of the package being used in a continuous integration context, see the [stools-clair]( repository.


In this work we will use [Clair OS]( combined with Continuous Integration (travis and circle) to scan [Singularity]( containers for security vulnerabilities.

## Background Clair is intended to run as a server to continuous scan Docker layers for vulnerabilities. This doesn’t map well to the research domain because of the following:

  • Docker containers come in layers (.tar.gz files) while Singularity images are single binary files that don’t “plug in” nicely to Clair.
  • Most researchers can’t support continuous running of such a service.

On the other hand, a typical researcher does use services like [TravisCI]( and [CircleCI]( to run their code bases against tests. Since these services now offer running containers and other service-type things, we in fact could do the following:

  • Spin up a Clair server during testing
  • Build a Singularity image, and scan the filesystem contents (before finalized in the image).

While this isn’t a continually running service, we can minimally ensure that a container is scanned each time it is built (and then likely merged to be used in production). If the user takes advantage of [Singularity Hub]( or [Singularity Registry Server]( the image will be pushed or built for production after passing these various tests.

This experiment is based on early discussion in [this thread](

## Basic Usage

If you want, build the container (or use from Docker Hub)

`bash docker build -t vanessa/stools-clair . `

Start the application with docker compose. Note that you should have the images you want to scan in the $PWD, which will be mapped to the container in /code (see the docker-compose.yml file). You can change this around, just be sure that the containers you want to add are here. I’ll be updating this so the server inside can accept a post for an external container, but I need some sleep first :)

`bash docker-compose up -d `

Scan a local image in $PWD mapped to /code in the container. If you didn’t clone the repo, make sure you get the [docker-compose.yml]( file first!

`bash singularity pull shub://vsoch/singularity-hello-world docker exec -it clair-scanner sclair vsoch-singularity-hello-world-master-latest.simg `

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