Continuous Delivery with Docker and Jenkins

Dockerfile

Creating each Docker image manually with the commit command could be laborious, especially in the case of build automation and the Continuous Delivery process. Luckily, there is a built-in language to specify all the instructions that should be executed to build the Docker image.

Let's start with an example similar to the one with Git and JDK. This time, we will prepare the ubuntu_with_python image.

1. Create a new directory and a file called Dockerfile with the following content:

        FROM ubuntu:16.04        RUN apt-get update && \            apt-get install -y python

2. Run the command to create the ubuntu_with_python image:

        $ docker build -t ubuntu_with_python .

3. Check that the image was created:

$ docker imagesREPOSITORY TAG IMAGE ID CREATED SIZE ...