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…
Joint table ownership in microservices occurs when multiple services perform write operations on the same table. Right off the bat, I’ll make it clear that no one likes joint ownership of tables. A few reasons for this are: However, it’s not always possible to avoid joint table ownership as we 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…
If you are a doctor treating a patient and want access to her medical record, you’d want the details to be available at all times. If it’s an emergency case, there can be absolutely no slippage. The data should be highly-available as it might be a matter of life and Read more…
Distributed systems encourage you to break apart data and services. This means you’ve to think about data ownership in a distributed system more deeply as compared to a traditional system. The common advice tends to proclaim that a service should own its data and that anyone wanting to access the Read more…
Fixed Window Rate Limiting algorithm is the simplest algorithm for applying rate limits out there. Though this algorithm may not be the best choice for large-scale distributed systems, understanding it is useful because it clarifies the concepts around Rate Limiting. In case you are interested in understanding the concept of 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…
Code reuse between multiple services is a hotly debated topic in software engineering. You have some people fighting tooth and nail to prove that DRY (Don’t Repeat Yourself) is the way to go. On the other end of the spectrum, the proponents of the “share nothing” philosophy are ready to Read more…
Rate limiting is the concept of controlling the amount of traffic being sent to a resource. How can you achieve this control? By means of a rate limiter – a component that lets you control the rate of network traffic to an API server or any other application that you Read more…
