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hints-for-use-with-docker.md

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Hints for using ORT with Docker

General Hints

Mount current working directory or directory relative to working directory

docker run \
  -v $PWD/:/project \ # Mount current working directory into /project to use as input.
  ort --info \
  -c /project/ort/config.yml \ # Use file from "<workingdirectory>/ort" as config.
  analyze -i /project [...] # Insert further arguments for the command.

If only a subproject shall be analyzed, change the input path -i /project to -i /project/subproject. Note that still the projects root directory needs to be mounted to Docker for ORT to detect VCS information.

Note: The single forward slash / between the environment variable $PWD and the : is required for PowerShell compatibility, as PowerShell otherwise interprets : as part of the environment variable.

Setting custom certificates to Docker image keystore

It is possible to install custom certificates when building the image so that they are installed into various keystores. To do this, specify --build-arg CRT_FILES=<path> when running docker build. Note that this requires the directory or certificate file to be inside the Docker build context (usually the directory where the build is run, i.e. probably the directory the Dockerfile resides in). Otherwise, the directories cannot be copied into the Docker image.

Common Issues

Docker build fails with an "SSL Handshake" error

Some web proxies, such as from Blue Coat (Symantec) do not support TLSv1.3, which leads to errors when Docker tries to establish a connection through them. The following steps allow to force a specific TLS version to be used:

  1. Insert ENV JAVA_OPTS="-Djdk.tls.client.protocols=TLSv1.2" in the Dockerfile, below the FROM line to force a specific TLS version.
  2. Run the build again, it should succeed now.

Authenticating with a private Git repository fails

To authenticate with a private Git repository, ORT uses the (semi)standardized .netrc file. With the following steps, .netrc can be used with Docker.

  1. Create a .netrc file:

    machine <hostname> login <username> password <password>

    For example:

    machine github.com login mygituser password mypersonaltoken

    Ensure that there are no additional spaces, newlines, tabs, or other whitespace characters after the hostname, username, or password. Some third-party tools would otherwise interpret these whitespace characters as part of the authentication string and cause authentication errors with some providers.

    Note: If you receive any authentication errors, double-check this file. The format often shared online with the properties separated by newlines does not work with Docker images for ORT, as not all included third-party tools support this format.

  2. Mount the .netrc into the home directory of the ORT Docker container. By default, that is the /root directory:

    docker run -v <workspace_path>:/project -v <netrc_folder_path>/.netrc:/root/.netrc ort --info scan (...)

    Important: Ensure that the .netrc file has been created at netrc_folder_path before running the command, otherwise Docker will create a folder .netrc inside the container, instead of mounting a single file.

It is also possible to use git config to set up access to private repositories.

  1. Configure your .gitconfig with your GitHub credentials

    [url "https://<username>:<password>@github.com"]
         insteadOf = https://github.com

  2. Mount the .gitconfig into the home directory of the ORT Docker container. By default, that is the /root directory:

    docker run -v <workspace_path>:/project -v <gitconfig_path>:/root/.gitconfig ort --info scan (...)

    Important: Ensure that the .gitconfig file has been created at gitconfig_path before running the command, otherwise Docker will create a folder .gitconfig inside the container, instead of mounting a single file.