We have discussed swarm managers a little in the previous sections, but let's take a closer look at what swarm managers do. The swarm managers do exactly what you would expect. They manage and maintain the state of the swarm cluster. They schedule swarm services, which we will talk about in Swarm services section of this chapter, but for now, think of swarm services as running containers. Manager nodes also serve up the API endpoints of the cluster, allowing for programmatic access via REST. Managers also direct traffic to the running services so that any container can be reached through any manager node without having to know which node is actually running the containers. As part of maintaining the state of the cluster, the managers will deal with the loss of nodes in the system, electing a new leader node in the event that the manager lost was the leader...
Docker Quick Start Guide
By :
Docker Quick Start Guide
By:
Overview of this book
Docker is an open source software platform that helps you with creating, deploying, and running your applications using containers. This book is your ideal introduction to Docker and containerization.
You will learn how to set up a Docker development environment on a Linux, Mac, or Windows workstation, and learn your way around all the commands to run and manage your Docker images and containers.
You will explore the Dockerfile and learn how to build your own enterprise-grade Docker images. Then you will learn about Docker networks, Docker swarm, and Docker volumes, and how to use these features with Docker stacks in order to define, deploy, and maintain highly-scalable, fault-tolerant multi-container applications.
Finally, you will learn how to leverage Docker with Jenkins to automate the building of Docker images and the deployment of Docker containers. By the end of this book, you will be well prepared when it comes to using Docker for your next project.
Table of Contents (10 chapters)
Preface
Free Chapter
Setting up a Docker Development Environment
Learning Docker Commands
Creating Docker Images
Docker Volumes
Docker Swarm
Docker Networking
Docker Stacks
Docker and Jenkins
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