Getting to know Docker – a better way to do virtualization?


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RedStack

In this post, with guest co-writers Edwin Biemond (@biemond) and Joel Nation (@joelith), we will explore virtualization with Docker.  You may have heard of Docker, it is getting a lot of interest lately, especially with the recent announcement that Google are using it in their cloud service.  What Docker does is that it allows you to create reusable ‘containers’ with applications in them.  These can be distributed, will run on several platforms, and are much smaller than the ‘equivalent’ virtual machine images.  The virtualization approach used by Docker is also a lot more lightweight than the approach used by hypervisors like VMWare and VirtualBox.

The motivation for looking at Docker is twofold.  Firstly, there are a lot of virtual machines images created for training purposes, e.g. for SOA Suite.  These are then distributed to Oracle folks and partners around the world.  They tend to be in the 20-40 GB range…

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