Book Image

The DevOps 2.4 Toolkit

By : Viktor Farcic
Book Image

The DevOps 2.4 Toolkit

By: Viktor Farcic

Overview of this book

Building on The DevOps 2.3 Toolkit: Kubernetes, Viktor Farcic brings his latest exploration of the Docker technology as he records his journey to continuously deploying applications with Jenkins into a Kubernetes cluster. The DevOps 2.4 Toolkit: Continuously Deploying Applications with Jenkins to a Kubernetes Cluster is the latest book in Viktor Farcic’s series that helps you build a full DevOps Toolkit. This book guides readers through the process of building, testing, and deploying applications through fully automated pipelines. Within this book, Viktor will cover a wide-range of emerging topics, including an exploration of continuous delivery and deployment in Kubernetes using Jenkins. It also shows readers how to perform continuous integration inside these clusters, and discusses the distribution of Kubernetes applications, as well as installing and setting up Jenkins. Work with Viktor and dive into the creation of self-adaptive and self-healing systems within Docker.
Table of Contents (12 chapters)
Now It Is Your Turn

Enabling Process Communication with Kube API Through Service Accounts

Humans are not the only ones who rely on a cluster. Processes in containers often need to invoke Kube API as well. When using RBAC for authentication, we need to decide which users will have permissions to perform specific actions. The same holds true for the processes running inside containers.

When we (humans) try to access a Kubernetes cluster with RBAC enabled, we are authenticated as users. Our username provides an identity that API server uses to decide whether we are allowed to perform intended actions. Similarly processes running inside containers might also need to access the API. In such cases, they are authenticated as a specific ServiceAccount.

ServiceAccounts provide a mechanism to grant permissions to processes running inside containers. In many ways, ServiceAccounts are very similar to RBAC users...