Introduction of AKS Architecture

Nitesh WayafalkarNitesh Wayafalkar
2 min read

Table of contents

What is AKS?

  • AKS: Azure Kubernetes Service

  • AKS is highly available, secure and fully managed Kubernetes Service

  • Available in 36 regions and growing

  • Comparing with other cloud providers , AKS is having presence in highest number of regions

  • One can run any type of workloads:

    • Windows based applications like .Net Apps

    • Linux supported applications like Java

    • IOT Device deployment and management on demand

    • Machine Learning model training with AKS

AKS Architecture

A. Azure AKS Cluster Control Plane ( Master )

  1. etcd

  • This is consistently and highly available in memory storage

  • Key value store used as a Kubernetes backing store for all cluster data

  • It stores all the master and the worker node information

  1. Kube scheduler

  • It is responsible for distributing containers across multiple nodes

  • It watches for newly created pods with no assigned node and selects node for them to run on.

  1. Kube API Server

  • This acts as frond end of the Kubernetes control plane

  • It exposes the Kubernetes API. So command line tools, like kubectl , or users, and even the master components like scheduler, controller manager, and etcd, and worker node components like kubelet.

Everything can talk to this kubeapi server to perform the operations on the master.

  1. AKS Kube Controller Manager

  • Controllers are responsible for noticing, and then responding when nodes, containers, or endpoints go down

We have different controllers here

Node Controller

Replication Controller

Endpoint Controller

Service Account

Token Controller

B. Azure AKS Node Pools

Container runtime is underlying software where we run everything

  1. Kubelet

  • Kubelet is the agent that runs on every node in the cluster

  • This is agent responsible for making sure that containers are running in a port on a node

  • And Kubelet is always in constant communication with kube-api scheduler

  1. Kube-Proxy

  • Kubeproxy is responsible for dns networking in worker node and runs on every cluster

  • It maintains the network rules on the nodes

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AKS,Azure kubernetes servicesDevops articlesDevopsKubernetes

Written by

Nitesh Wayafalkar
Nitesh Wayafalkar

I am carrying 9.5 Years of experience into IT. Earlier, I used to automate manual tests using Selenium and Rest assured to make the application robust and find defects in the early stage. Now, I help businesses time the market by automating application deployment process and secure them using different SAST and DAST tools along with various dashboard and alerting mechanism like Grafana. Also helped production by making application highly available and more faiure tolerant.