Autoscale your applications in Kubernetes using Vertical Pod Autoscaler ( VPA ) and Horizontal Pod Autoscaler ( HPA )

What is Autoscaling?

Autoscaling is a method that dynamically scales up / down the number of computing resources that are being allocated to your application based on its needs. For example, you might have a situation where the load on your website increases only at the end of every month. You might need additional web servers to handle the load at the end of every month. But what about the rest of the days, your servers sit idle and your monthly…

Run your GitHub actions on your own Kubernetes cluster

In my previous article on Creating a GKE cluster with GitHub actions, we have used GitHub actions to create a GKE cluster. We used the runners which are hosted on Github servers. In this case, we will not have access to the Infrastructure, and we are running our code on a GitHub hosted server. There might be few restrictions within your organization that the code that is running should be run in the infrastructure which is hosted by your organization and you want to run on an infra where you have…

RabbitMQ up and running on Kubernetes and test using a simple Golang application.

Well, the word RabbitMQ is quite heard across the DevOps Era. So before we proceed to understand what RabbitMQ is let us understand what a messaging broker is. A message broker is a software that enables applications, services to communicate with each other and exchange data. Some examples of these messaging broker software are

1. Apache Kafka
2. Amazon MQ
3. Oracle Message Broker
4. Apache Active MQ
5. Rabbit MQ ( We will deep dive about Rabbit MQ in this article )

RabbitMQ is an open-source message-broker. It is the most…

How to create any resource on the cloud using Kubernetes manifests and Crossplane.

In the Kubernetes era, all of your application blueprints are packaged into a lot of Kubernetes manifests files or maybe also packages as charts using tools like helm. So how do you create any cloud resource on the cloud? You can maybe use

1. An external terraform module to create the resource.
2. Use a Kubernetes Job and create the resources using AWS SDK’s.
3. Use a bash / Python script and internally call AWS CLI commands.

But how reliable is this? Unlike Kubernetes manifests in which the yaml file…

How to store your secrets in GitHub using Sealed Secrets and Kubeseal

Nowadays in the Kubernetes era, all of our manifests are stored in an SCM tool like GitHub, Gitlab, BitBucket, etc. But where are your Kubernetes secrets stored? Do you store them in any SCM tool? If yes, then you may probably want to delete them from SCM right away. Because Kubernetes secrets are base64 encoded. Anyone knowing this command base64 -d can easily decode your secrets. So where do you want to store your secrets now? May be store all the manifests in GitHub and store the secrets…

How to automatically create DNS records in Kubernetes using External DNS

Are you running your workloads in GKE / EKS / AKS? Do you use Services of type LoadBalancer? If yes then this is the right article for you. Let us suppose you have a web application running in your Kubernetes Cluster. You might have a public-facing load balancer so that your application is accessible to the entire world. Imagine you have a domain name called kubernetesisgreat.com and you want to map that to your public-facing load balancer provisioned by Kubernetes. For this, you can either use a gcloud command…

Getting started with Jenkins Operator in Kubernetes

Before we dive into Jenkins Operator, let us spare some time to understand what a Kubernetes operator actually is. As mentioned in RedHat’s Documentation page, a Kubernetes operator is an application-specific controller that extends the functionality of the Kubernetes API to create, configure, and manage instances of complex applications on behalf of a Kubernetes user. It is a method of packaging, deploying, and managing a Kubernetes application. The Kubernetes Operator concept was developed by engineers at CoreOS in 2016. There are numerous operators available in the market as of now. …

Automating Kubernetes Cluster creation and Bootstrapping using GitHub Actions

GitHub Actions allows you to design your CI and CD workflows directly in your GitHub repositories. GitHub actions are entirely integrated with GitHub. Build, Test, and Deploy can be done directly from GitHub. So your CI/CD workflows can be at the same place where your source code exists. The CI/CD Pipeline can be triggered with events like pull requests or merging of branches etc. …