August 2017
Intermediate to advanced
332 pages
9h 16m
English
Content preview from Continuous Delivery with Docker and Jenkins
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Scheduling strategy
So far, we have learned that the manager automatically assigns a worker node to a task. In this section, we dive deeper into what automatically means. We present the Docker Swarm scheduling strategy and a way to configure it according to our needs.
Docker Swarm uses two criteria for choosing the right worker node:
- Resource availability: Scheduler is aware of the resources available on nodes. It uses the so-called spread strategy that attempts to schedule the task on the least loaded node, provided it meets the criteria specified by labels and constraints.
- Labels and constraints:
- Label is an attribute of a node. Some labels are assigned automatically, for example, node.id or node.hostname; others can be defined by the ...
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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.