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You're reading from The DevOps 2.1 Toolkit: Docker Swarm The next level of building reliable and scalable software unleashed

Product type Paperback

Published in May 2017

Publisher

ISBN-13 9781787289703

Length 436 pages

Edition 1st Edition

Tools

Docker

Concepts

DevOps

Author (1):

Viktor Farcic

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Table of Contents (17) Chapters

Preface

1. Continuous Integration with Docker Containers FREE CHAPTER

2. Setting Up and Operating a Swarm Cluster

3. Docker Swarm Networking and Reverse Proxy

4. Service Discovery inside a Swarm Cluster

5. Continuous Delivery and Deployment with Docker Containers

6. Automating Continuous Deployment Flow with Jenkins

7. Exploring Docker Remote API

8. Using Docker Stack and Compose YAML Files to Deploy Swarm Services

9. Defining Logging Strategy

10. Collecting Metrics and Monitoring the Cluster

11. Embracing Destruction: Pets versus Cattle

What now?

12. Creating and Managing a Docker Swarm Cluster in Amazon Web Services

13. Creating and Managing a Docker Swarm Cluster in DigitalOcean

14. Creating and Managing Stateful Services in a Swarm Cluster

15. Managing Secrets in Docker Swarm Clusters

16. Monitor Your GitHub Repos with Docker and Prometheus

Jenkins agent

There are quite a few ways to run Jenkins agents. The problem with most of them is that they force us to add agents separately through Jenkins UI. Instead of adding agents one by one, we'll try to leverage Docker Swarms ability to scale services.

One way we can accomplish the quest for making scalable agents is the Jenkins Swarm Plugin (https://wiki.jenkins-ci.org/display/JENKINS/Swarm+Plugin). Before you start making wrong conclusions, I must state that this plugin has nothing to do with Docker Swarm. The only thing they share is the word Swarm.

The Jenkins Swarm Plugin (https://wiki.jenkins-ci.org/display/JENKINS/Swarm+Plugin) allows us to auto-discover nearby masters and join them automatically. We'll use it only for the second feature. We'll create a Docker Swarm service that will act as a Jenkins agent and join the master automatically.

First things first. We need to install the plugin.

Please open the Plugin Manager screen as shown in the following code: