jenkins - How do I find the Docker REST API URL?

Question

I have installed the Docker build step plugin for Jenkins.

The documentation is telling me:

Name      : Choose a name for this Docker cloud provider
Docker URL: The URL to use to access your Docker server API (e.g: http://172.16.42.43:4243)

How can I find my URL to the REST API (I have Docker installed on my host)?

Answer 1

If you are on Linux and need to connect to Docker API on the local machine, its URL is probably unix:///var/run/docker.sock, like it is mentioned in documentation: Develop with Docker Engine SDKs and API

By default the Docker daemon listens on unix:///var/run/docker.sock and the client must have root access to interact with the daemon. If a group named docker exists on your system, docker applies ownership of the socket to the group.

This might be helpful if you are connecting to Docker from a JetBrains IDE.