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Docker and Kubernetes for Java Developers by Jaroslaw Krochmalski

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Images

Think of an image as a read-only template which is a base foundation to create a container from. It's same as a recipe containing the definition of everything your application needs to operate. It can be Linux with an application server (such as Tomcat or Wildfly, for example) and your Java application itself. Every image starts from a base image; for example, Ubuntu; a Linux image. Although you can begin with a simple image and build your application stack on top of it, you can also pick an already prepared image from the hundreds available on the Internet. There are a lot of images especially useful for Java developers: openjdk, tomcat, wildfly, and many others. We will use them later as a foundation for our own images. It's a lot ...

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