Containerizing a Legendary PetClinic App Built with Spring Boot

Unfortunately,  even the   within  Docker uses a  to specify each image’s  Each layer stores import

Unfortunately,  even the   within  Docker uses a  to specify each image’s  Each layer stores important changes stemming from your base image’s standard configuration. Let’s create an empty reate the following empty

The upstream OpenJDK image no longer provides a JRE, so no official JRE images are produced. The official OpenJDK images just contain “vanilla” builds of the OpenJDK provided by  or  Next, let’s quickly create a directory to house our image’s application code. This acts as the working directory for your application: Once we have our file inside the image, we can use the command to execute the command . This works identically to running the (or The next thing we need to do is to add our source code into the image. We’ll use the command just like we did with our Finally, we should tell Docker what command we want to run when our image is executed inside a container. We do this using the Here’s your complete This line excludes the target directory — which contains output from Maven — from Docker’s build context. There are many good reasons to carefully structure a So, what’s this build context and why’s it essential? The  command builds Docker images from a and a This context is the set of files located in your specified Meanwhile, the compilation context is where the developer works. It could be a folder on Mac, Windows, or a Linux directory. This directory contains all necessary application components like source code, configuration files, libraries, and plugins. With the Once the build process is completed, you can list out your images by running the following command:  Docker builds are a great way to ensure your builds are 100% reproducible and as lean as possible. You can create multiple stages within a

The first image  is labeled . This helps us refer to this build stage in other build stages. Next, we’ve added a new stage labeled Notice that this You should receive the following response: Congratulations! You’ve successfully learned how to containerize a PetClinic application using Docker. With a multi-stage build, you can easily minimize the size of your final Docker image and improve runtime performance. Using a single YAML file, we demonstrated how Docker Compose helps you easily build and deploy your PetClinic app