July 2017
Intermediate to advanced
414 pages
11h 18m
English
Content preview from Spring 5.0 Microservices - Second Edition
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The Docker image
One of the key concepts of Docker is the image. The Docker image is the read-only copy of the operating system libraries and applications and their libraries. Once an image is created, it is guaranteed to run on any Docker platforms without alterations.
In Spring Boot microservices, a Docker image will package operating systems such as Ubuntu, Alpine, JRE, and the Spring Boot fat application jar file. It also includes instructions to run the application and how to expose services.
As shown in the preceding diagram, the Docker images are based on a layered architecture, where the base image will be one of the flavors of Linux. ...
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