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Example 2

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Defining an image

Docker images are templates for containers. A Dockerfile script contains the commands to build the image, just like how a shell script automates day-to-day tasks.

Let's take a look at example2/Dockerfile.



  <empty file>

A clean slate is always a great starting point.

We want to have the image print Hello World. when run. Here are some useful Dockerfile commands:

Command Arguments Description
FROM <image name> Base image for this image
CMD <shell-command OR array-of-command-arguments> Command to be run

Building the image

$ docker build --rm --tag workshop-docker/example2 --file Dockerfile .

Running the image

$ docker run -it --rm workshop-docker/example2

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