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Building Container Images

Lab Solution

Here's a sample solution:

It just creates a working directory called /app in the container filesystem, and copies in the Java class file.

The class file and the Dockerfile are in different directories, so you need to use a context where Docker can access both files:

labs
└─ images   <- this is the context
   └─  java   <- so Docker can get the class file from here
   └─  lab    <- and the Dockerfile from here

Build the image using that context and specifying the path to the Dockerfile:

docker build -t java-hello-world -f labs/images/lab/Dockerfile labs/images

Run a container from the image:

docker run java-hello-world

The output should say Hello, World

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