Book Image

Mastering Service Mesh

By : Anjali Khatri, Vikram Khatri
Book Image

Mastering Service Mesh

By: Anjali Khatri, Vikram Khatri

Overview of this book

Although microservices-based applications support DevOps and continuous delivery, they can also add to the complexity of testing and observability. The implementation of a service mesh architecture, however, allows you to secure, manage, and scale your microservices more efficiently. With the help of practical examples, this book demonstrates how to install, configure, and deploy an efficient service mesh for microservices in a Kubernetes environment. You'll get started with a hands-on introduction to the concepts of cloud-native application management and service mesh architecture, before learning how to build your own Kubernetes environment. While exploring later chapters, you'll get to grips with the three major service mesh providers: Istio, Linkerd, and Consul. You'll be able to identify their specific functionalities, from traffic management, security, and certificate authority through to sidecar injections and observability. By the end of this book, you will have developed the skills you need to effectively manage modern microservices-based applications.
Table of Contents (31 chapters)
1
Section 1: Cloud-Native Application Management
4
Section 2: Architecture
8
Section 3: Building a Kubernetes Environment
10
Section 4: Learning about Istio through Examples
18
Section 5: Learning about Linkerd through Examples
24
Section 6: Learning about Consul through Examples

Installing a Consul demo application

To explore the service mesh capabilities of Consul through a Kubernetes environment, we will install a demo application that is available from Hashicorp. This demo uses two simple services: a counting service and a frontend web UI service (connects to the counting service to show the results). Let's get started:

  1. Let's take a look at the counting pod definition, which shows counting and a counting-init container:
# Counting pod

apiVersion: v1
kind: Pod
metadata:
name: counting
annotations:
"consul.hashicorp.com/connect-inject": "true"
spec:
containers:
- name: counting
image: hashicorp/counting-service:0.0.2
ports:
- containerPort: 9001
name: http
initContainers:
- name: counting-init
image: hashicorp/counting-init:0.0.9
env:
- name: POD_IP
valueFrom:
fieldRef:
...