slimtoolkit / slim

What is Docker Connect Options?

Docker Connect Options provide a way to configure how Slim connects to Docker. These options allow you to customize the connection behavior, including specifying the Docker host address, using TLS, and configuring other connection parameters.

Why is Docker Connect Options important?

Docker Connect Options are crucial for ensuring Slim can successfully communicate with your Docker environment. They enable flexibility in connecting to Docker instances running locally, on remote machines, or within different network configurations.

Connecting to Docker

Slim utilizes the docker package (https://github.com/moby/moby) for interaction with Docker. It leverages the standard Docker API to manage containers, images, and other Docker resources.

Specifying the Docker Host Address

You can control which Docker host Slim connects to using the DOCKER_HOST environment variable or the --docker flag.

Example (Environment Variable):

DOCKER_HOST=tcp://192.168.99.100:2376 slim build .

Example (Command-line Flag):

slim build . --docker tcp://192.168.99.100:2376

Using TLS

If your Docker daemon is configured to use TLS, you need to provide Slim with the appropriate TLS certificates and credentials.

Example:

DOCKER_HOST=tcp://192.168.99.100:2376 \
          DOCKER_CERT_PATH=/path/to/certs \
          DOCKER_TLS_VERIFY=1 \
          slim build .

Note: Replace /path/to/certs with the actual path to your Docker TLS certificates.

Other Connection Parameters

For more advanced configurations, you can specify additional Docker connection parameters using the DOCKER_* environment variables or the --docker-options flag.

Example (Environment Variables):

DOCKER_HOST=tcp://192.168.99.100:2376 \
          DOCKER_TLS_VERIFY=1 \
          DOCKER_API_VERSION=1.40 \
          slim build .

Example (Command-line Flag):

slim build . --docker-options "tlsverify=1 api-version=1.40"

Note: Refer to the Docker documentation for a complete list of supported connection parameters: https://docs.docker.com/engine/reference/commandline/docker/

Troubleshooting Connection Issues

If you encounter issues connecting to Docker, review the following:

  • Verify that the Docker daemon is running and accessible.
  • Ensure the DOCKER_HOST variable is set correctly and points to the correct Docker host address.
  • Confirm that the TLS certificates are configured correctly.
  • Check the Docker API version compatibility between Slim and your Docker daemon.

Remember:

Slim’s Docker connect options allow for customization of the connection process, enabling you to seamlessly integrate with different Docker environments. Carefully configure these options to ensure a smooth and reliable interaction between Slim and your Docker daemon.

Top-Level Directory Explanations

build/ - This directory contains the build files for the Slim project. The package/ subdirectory within build/ contains various packages used during the build process.