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

Using ServiceAccounts from side-car containers

We still have one more pending issue that we can solve with ServiceAccounts. In the previous chapter we tried to use cvallance/mongo-k8s-sidecar container in hopes it'll dynamically create and manage a MongoDB replica set.

We failed because, at that time, we did not know how to create sufficient permissions that would allow the side-car to do its job. Now we know better.

Let's take a look at an updated version of our go-demo-3 application.

 1  cat sa/go-demo-3.yml

The relevant parts of the output are as follows

apiVersion: v1
kind: ServiceAccount
  name: db
  namespace: go-demo-3
kind: Role apiVersion: metadata: name: db namespace: go-demo-3 rules: - apiGroups: [""] resources: ["pods"] verbs: ["list"]
apiVersion: rbac.authorization...