Complete Guide to Azure Kubernetes Service - Elastic & K8S

What are we going to learn, who is going to teach what? what will be the key take aways?

This videos answers all of these question within 5 minutes, make sure you don't miss it.

Kubernetes is a buzz word, it is the defacto tool to manage the containers however it is not easy to manage as it requires lot of skill sets. Azure Kubernetes Service (AKS) makes deploying and managing containerised applications easy. It offers serverless Kubernetes, an integrated continuous integration and continuous delivery (CI/CD) experience and enterprise-grade security and governance.

In this video we will talk about the architecture of Kubernetes.

Fun Fact:

Did you know with Azure kubernetes Service you don't need to manage and pay for master node? you heard it right Azure manages the master node itself and you only take care of worker nodes.

Creating an AKS has never been so easy, in this video, we are going to write terraform scripts right from scratch to build a brand new Azure Kubernetes Cluster.

Just in case you don't have terraform installed, you may install it using brew package manager > "brew install terraform"

What are we going to build?

• Azure Resource Group

• Virtual Network

• Subnet

• Public IP Address

• Log Analytics workspace

• Log analytics solution

• Azure Kubernetes Service

• Azure Container Registry

To interact with Azure APIs, an AKS cluster requires a service principal or managed identity to talk the Azure Kubernetes Cluster.

In this video we are going to learn how we are going to generate client ID and secrets for AKS and then deploy the Azure Kubernetes cluster.

How do you generate secrets:

az ad sp create-for-rbac --role="Contributor" --scopes="/subscriptions/SUBSCRIPTION_ID

Fun Fact:

Do you know why Kubernetes called as K8S? between K and S there are 8 alphabets

You have just built a brand new Kubernetes cluster how do you access it? to connect to your Kubernetes cluster, use the az aks get-credentials command. This video shows you how you can access your Azure Kubernetes Cluster.

Command:

az aks get-credentials --resource-group <your resource group name> --name <kubernetes cluster name>

Kubectl get <object>

<object> could be pod, services, namespaces

This video teaches us about the deployment of dashboard on Azure Kubernetes Services and leverage the power of kubernetes dashboard to deploy and troubleshoot your applications.

How do you create and access dashboards:

• kubectl create -f https://raw.githubusercontent.com/kubernetes/dashboard/72832429656c74c4c568ad5b7163fa9716c3e0ec/src/deploy/recommended/kubernetes-dashboard-arm.yaml

• kubectl create serviceaccount dashboard -n default

• kubectl create clusterrolebinding dashboard-admin -n default

  --clusterrole=cluster-admin

  --serviceaccount=default:dashboard

• kubectl get secret $(kubectl get serviceaccount dashboard -o jsonpath="{.secrets[0].name}") -o jsonpath="{.data.token}" | base64 --decode

Where do you store your docker images? how do you make sure only authorised users are allowed to push - pull docker images, Azure container Registry helps in Build, store, secure, scan, replicate and manage container images and artifacts with a fully managed, geo-replicated instance of OCI distribution.

Login to ACR:

az acre --name <name of the ACR>

If you have a shared Kubernetes Cluster and make sure that you segregate different workload, namespace is the object you would rely on achieve the separation.

• You learnt what is namespace, but how do you create it? how do make sure you separate objects into different namespaces. In this video we are going to learn how to create the namespace.

• Kubernetes manifests are used to create, modify and delete Kubernetes resources such as pods, deployments, services or ingresses.The manifests are yaml files to perform any CRUD operation on the Kubernetes cluster

• How do you get the list of namespaces:

  • Kubectl get namespaces

Fun Fact: did you know you can manage Azure Kubernetes namespaces you a third party utility ? Kubens

• Smallest deployable object, representing single instance of running process in the cluster

• 1:1 mapping with your container

• Initially define resource request like CPU, Memory

• Ephemeral in nature

• Upgrade your apps with 0-minimal downtime

• Apt for stateless application like front ends,web apps.

• Maintains multiple replicas of your apps

• Automatic rollbacks if any instance fails or become unresponsive

• A bridge to talk to your application/pod

• How do external user access your application?

• How do you expose your application?

• Can you put an IP address with a deployment?

  
  

In this video we are going to deploy Kubernetes Service

• How do you create a persistent storage?

• How do you preserve your data for as long as you want?

• Do you care when your POD is gone and loose data along with it?

• What type of persistent storage you select?

ConfigMap is an API object used to store non-confidential data in key-value pairs. Pods can consume ConfigMaps as environment variables, command-line arguments, or as configuration files in a volume.

ConfigMap allows you to decouple environment-specific configuration from your container images, so that your applications are easily portable and can be reused if needed

Why do you need a stateful state if you have a deployment as a controller?

How do you manage a POD which needs to have persistent storage?

What happens to the data disk when a POD is deleted/evicted?

Kubernetes manifests are used to create, modify and delete Kubernetes resources such as pods, deployments, services or ingresses.The manifests are yaml files to perform any CRUD operation on the Kubernetes cluster

Learn how to deploy StatefulSets.

When a pod gets into the err state how do you get the pod back into the running state?  This video answers the question

When creating a service, you have the option of automatically creating a cloud network load balancer. This provides an externally-accessible IP address that sends traffic to the correct port on your cluster nodes so that you can access the service over the internet.

This video describes how to write manifests and roll out deployments on Kubernetes cluster.

How do you make sure you have multiple copies of your application, how do you make sure when you upgrade your apps on kubernetes service they don't go through any downtime. This video helps us answer all of those questions

By default, the public IP address assigned to a load balancer resource created by an AKS cluster is only valid for the lifespan of that resource. If you delete the Kubernetes service, the associated load balancer and IP address are also deleted. If you want to assign a specific IP address or retain an IP address for redeployed Kubernetes services, you can create and use a static public IP address.

This video shows you how to create a static public IP address and assign it to your Kubernetes service.

Logstash is an open source, server-side data processing pipeline that ingests data from a multitude of sources simultaneously, transforms it, and then sends it to your favorite "stash."

Azure Monitor for containers, you can use the performance charts and health status to monitor the workload of Kubernetes clusters hosted on Azure Kubernetes Service (AKS), Azure Stack, or other environment from two perspectives. You can monitor directly from the cluster, or you can view all clusters in a subscription from Azure Monitor. Viewing Azure Container Instances is also possible when monitoring a specific AKS cluster.