May 2017
Intermediate to advanced
436 pages
9h 44m
English
Content preview from The DevOps 2.1 Toolkit: Docker Swarm
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Discovering addresses of all instances that form a service
If you browse through the official Docker documentation, you will not find any reference to addresses of individual instances that form a service.
The previous sentence might not be true at the time you're reading this. Someone might have updated the documentation. However, at the time I'm writing this chapter, there is not a trace of such information.
The fact that something is not documented does not mean that it does not exist. Indeed, there is a special DNS that will return all IPs.
To see it in action, we'll create the global service called util and attach it to the proxy network:
docker service create --name util \ --network proxy --mode global \ alpine sleep 1000000000docker ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.