Kubernetes for Developers

Making your first container

Making a container is something easily done with the Docker software and the docker build command. This command uses a manifest that details how to create the container, called a Dockerfile.

Let's start with the simplest possible container. Create a file called a Dockerfile and add this to it:

FROM alpineCMD ["/bin/sh", "-c", "echo 'hello world'"]

And then, invoke build:

docker build .

If you see a response like this:

"docker build" requires exactly 1 argument.See 'docker build --help'.Usage: docker build [OPTIONS] PATH | URL | -Build an image from a Dockerfile

Then you are either missing the . in the command, or ran the command in a directory different from where you created the Dockerfile. The . is telling