Tag Archives: Kubernetes

This is going to be a small post since it has to deal with kubernetes and secrets. Yet it is a very useful once since adding secrets is so common yet so easy to forget (guilty as charged). So we will cover username and password, key/values, file uploading, secrets. Upload username and password using command line. kubectl create secret generic ...

Context I have been working in a team where we use kubernetes in production (not the nginx example- the real shit) for 2 years now. I have configured and used Kubernetes clusters from version 1.4.x with tools like kube-aws to 1.6-1.7 configured with kops. Amazon’s EKS is the third breed of kubernetes provisioning solutions that I have the chance to try and this post ...

This is a post about a simple helm chart that I have worked on to deploy any generic app image to Kubernetes. The chart is available [here] It tries to solve the issue of having to manage a set of raw Kubernetes resources(deployment,secrets,hpa) and instead letting helm manage these resources. The chart is generic enough that it should be able to ...

I have been working with Kubernetes in production for 2 years now. Over this time we have migrated 3 or 4 times clusters, changed techinques and tools of deployments, changed habits or pushed back to some of the hype and trends coming up every day on the kubernetes scene. I guess nothing new here, this is what almost everybody does. My ...

Software design principles Principles exist in many areas of life, and they generally represent a fundamental truth or belief from which others are derived. In software, principles are rather abstract guidelines, which are supposed to be followed while designing software. There are fundamental principles for writing quality software such as KISS (Keep it simple, stupid), DRY (Don’t repeat yourself), YAGNI ...

Let’s say you need to install a Kubernetes cluster in your organization for development and testing purposes. Minikube looks like a perfect fit for that job. It was specially designed for users looking to try out Kubernetes or develop with it day-to-day. It runs a single-node Kubernetes cluster inside a VM on a standalone machine. So, you found a server for ...

In my previous post, I showed why Cockroach DB might help you if you need a cloud native SQL database for your application. I explained how to install it in Kubernetes/OpenShift and how to validate that the data is replicated correctly. In this post, I am going to show you how to use Cockroach DB in a Spring Boot application. Notice that ...

CockroachDB 2.0 has just been released. For those who don’t know what it is, it can be summarized as a SQL database for the cloud era. One of the best things about CockroachDB is that it automatically scales, rebalances and repairs itself without sacrificing the SQL language. Moreover, Cockroach implements ACID transactions,  so your data is always in a known ...

Kubernetes config maps and secrets allow use to inject configuration files into containers. If we want multiple config entries that originate from different config maps or secrets to be injected into the same location, we are required to specify a sub path: kind: Deployment apiVersion: apps/v1 metadata: name: hello-world spec: replicas: 1 template: metadata: labels: app: hello-world spec: containers: - ...