November 2016
Intermediate to advanced
378 pages
8h 37m
English
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Using the host gateway backend
As we've seen already, Flannel supports two types of overlay network. Using either UDP or VXLAN encapsulation, Flannel can build an overlay network between Docker hosts. The obvious advantage to this is that you can provision networks across disparate Docker nodes without having to touch the physical underlay network. However, some types of overlay networks also introduce a significant performance penalty, especially for processes that perform encapsulation in user space. Host gateway mode aims to solve that problem by not using an overlay network. This, however, comes with its own limitations. In this recipe, we'll review what host gateway mode can provide as well as show how to configure it.
Getting ready
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.