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A Docker Introduction
Docker is becoming increasingly popular. Developers and system administrators are discovering just how headache free it is to port applications. Container technology allows for the launch and configuration of all dependencies quickly and easily.
The Container Principle
The open-source program takes its name from the shipping containers credited as the invention of a guy called Malcolm Mclean, a trucker, who came up with a standardized way of loading cargo from trucks to ships and warehouses. The strong uniform design was theft resistant and easy to load and unload. Docker has virtualized this principle with container technology. And developers can use Docker to ‘build, ship, and run’ applications on top of a Linux instance. And just like their large metal counterparts, they provide an isolated space for the whole team to work within.
Development, build, test and operations teams; they all stand to gain from using container software. The tech provides a virtual isolation area where things can move around without consideration of the contents. At a considerably quicker speed over VMs. They are more efficient in comparison to hypervisors, in terms of systems resources due to their shared operating systems. They each have their own isolated user space. This means you can run multiple containers (LXCs) together (without foregoing user space) on a single host. It is their standardization that stands them apart from other companies offering similar tech.
The Next Step
This article is a great introduction to suggest some ways you can utilize Docker yourself, without going mad and throwing all your applications at the program. The author provides several links to ideas to help simplify your architecture, a script for simple automated container upgrades, and tips to optimize deployment. The article recommends some initial steps new developers working with Docker can follow to boost workflow and make the most of the technology.
For more information on how to get the most from Docker, read our post on Creating a High-Availability WordPress Cluster with Docker Swarm and EFS.