May 2017
Beginner
300 pages
7h 26m
English
Content preview from Learning Docker - Second Edition
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Distinguishing Docker containers
Precisely speaking, Docker containers wrap a piece of software in a complete filesystem that contains everything that is needed to run: source code, runtime, system tools, and system libraries (anything that can be installed on a server). This guarantees that the software will always run the same, regardless of its operating environment.
The main motivations of Docker-enabled containerization are as follows:
- Containers running on a single machine share the same operating system kernel. They start instantly and use less RAM. Container images are constructed from layered filesystems and share common files, making disk usage and image downloads much more efficient.
- Docker containers are based on open standards. ...
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