Skip to content

Scanning a container image

The agent supports image scanning functionality in the OCI and Docker standards and can be launched in one of the following ways, indicating:

  • path to the tar archive created using docker save:
./johnny scan image ./my_own.tar \
--api_url <api_url> \
--api_token <api_token>
  • image name located in the Docker daemon, Podman:
./johnny scan image docker:python:3.9 \
--api_url <api_url> \
--api_token <api_token>
  • image name from the public Docker HUB:
./johnny scan image python:3.9 \
--api_url <api_url> \
--api_token <api_token>
  • image name from private registry:

Before working with a private repository, you need to run the command docker login 

./johnny scan image pvt_registry/johnny-depp:<version> \
--api_url <api_url> \
--api_token <api_token>

Alternatively, you can log in to the private registry using environment variables:

  • JOHNNY_REGISTRY_AUTH_AUTHORITY - URL to the registry (for example "docker.io", "localhost:5000", etc.);
  • JOHNNY_REGISTRY_AUTH_LOGIN - login;
  • JOHNNY_REGISTRY_AUTH_PASSWORD - password;
  • JOHNNY_REGISTRY_AUTH_TOKEN - token;

or through similar variables in the config file:

  • authority;
  • login;
  • password;
  • token.

Note: token and login with password are interchangeable.

Scanning the file system inside a Docker image

To scan files inside an image, you need to add the --scan-files parameter to the command or specify the scan-files variable in the image section in the config file.

When scanning a file system, you can use the --ignore option to exclude specific files from analysis. For example:

./johnny scan image ./my_own.tar \
--api_url <api_url> \
--api_token <api_token> \
--scan-files \
--ignore "**/node_modules"

Command parameters

The scan image command has two unique parameters, in addition to the general scan command settings:

  • --hash – specifying the image hash;
  • --scan-files – scanning files in the image.

For a summary of the available command parameters and usage instructions, you can call the command with the -h, --help flag.