Book Image

Getting Started with Containerization

By : Dr. Gabriel N. Schenker, Hideto Saito, Hui-Chuan Chloe Lee, Ke-Jou Carol Hsu
Book Image

Getting Started with Containerization

By: Dr. Gabriel N. Schenker, Hideto Saito, Hui-Chuan Chloe Lee, Ke-Jou Carol Hsu

Overview of this book

Kubernetes is an open source orchestration platform for managing containers in a cluster environment. This Learning Path introduces you to the world of containerization, in addition to providing you with an overview of Docker fundamentals. As you progress, you will be able to understand how Kubernetes works with containers. Starting with creating Kubernetes clusters and running applications with proper authentication and authorization, you'll learn how to create high-availability Kubernetes clusters on Amazon Web Services (AWS), and also learn how to use kubeconfig to manage different clusters. Whether it is learning about Docker containers and Docker Compose, or building a continuous delivery pipeline for your application, this Learning Path will equip you with all the right tools and techniques to get started with containerization. By the end of this Learning Path, you will have gained hands-on experience of working with Docker containers and orchestrators, including SwarmKit and Kubernetes. This Learning Path includes content from the following Packt products: • Kubernetes Cookbook - Second Edition by Hideto Saito, Hui-Chuan Chloe Lee, and Ke-Jou Carol Hsu • Learn Docker - Fundamentals of Docker 18.x by Gabriel N. Schenker
Table of Contents (25 chapters)
Title Page
About Packt

Deployment API

The Deployment API was introduced in Kubernetes version 1.2. It is replacing the replication controller. The functionalities of rolling-update and rollback by replication controller, it was achieved with client side (kubectl command and REST API), that kubectl need to keep connect while updating a replication controller. On the other hand, Deployments takes care of the process of rolling-update and rollback at the server side. Once that request is accepted, the client can disconnect immediately. 

Therefore, the Deployments API is designed as a higher-level API to manage ReplicaSet objects. This section will explore how to use the Deployments API to manage ReplicaSets.

Getting ready

In order to create Deployment objects, as usual, use the kubectl run command or prepare the YAML/JSON file that describe Deployment configuration. This example is using the kubectl run command to create a my-nginx Deployment object:

//create my-nginx Deployment (specify 3 replicas and nginx version...