Our applications often need to deal with sensitive information such as credentials or private keys. In a Kubernetes-based system, we can handle such sensitive information using Secrets. In this post, I will explain how you can create a new Kubernetes Secret and use it in an application pod. 1 – Read more…
Over the years, Kubernetes has become the go-to platform for managing containerized applications. However, one big challenge in the container ecosystem is efficiently managing configuration data for applications running on Kubernetes clusters. This is where Kubernetes Config Maps play a key role. Kubernetes Config Maps provides a mechanism for storing Read more…
Jenkins is one of the most popular CI/CD tools out there. In this post, I take you through the step-by-step process of setting up a Jenkins server on Kubernetes. If you are new to Kubernetes, I suggest checking out this introduction to Kubernetes. 1 – Creating a Namespace In Kubernetes, Read more…
PersistentVolumes & PersistentVolumeClaims make it quite easy to provision persistent storage in Kubernetes. They shield the developer from dealing with the underlying storage technology. However, a cluster admin has to provision the actual storage up front. Kubernetes can also perform this job by means of Storage Class. By using StorageClass Read more…
In this post, I introduce the concept of Persistent Volume Claim in Kubernetes. This is an extremely important concept for managing the storage needs of your applications running on Kubernetes. 1 – Why the need for Persistent Storage in Kubernetes? Let’s say you want to host a database on the Read more…
K3S is a CNCF-certified Kubernetes offering by Rancher that’s designed to be lightweight when compared to K8S. To achieve this, they removed a lot of extra drivers that weren’t needed as part of the core framework. This makes it easy to install, reduces memory consumption and brings the binary file Read more…
Kubernetes HostPath Volume is a type of persistent storage available to your Kubernetes Pods. In earlier posts, we saw Kubernetes emptyDir Volume & also using a git repository as a Kubernetes Volume. In both of those cases, however, the volume’s content gets deleted when a pod is torn down. However, Read more…
You can mount a Git Repo as a Kubernetes Volume in your pod. But why do you need it? Let’s say you want to host a few static web pages using Nginx running on a pod. You can commit the static web pages (the HTML files) on GitHub and mount Read more…
The emptyDir is the simplest type of Kubernetes Volume. As the name suggests, this type of volume starts out as an empty directory. When the application inside the pod runs, it can write any files to the emptyDir volume. The best use of an emptyDir Kubernetes Volume is sharing files Read more…
The default Kubernetes service provides a stable IP address that allows clients to connect to pods. However, you don’t control which pod you are connecting to. The service forwards the connection to a randomly selected backing pod. Such a service is known as the Cluster IP service. But what if Read more…