Resources

Kubernetes Guide: Graceful Shutdown with Lifecycle preStop Hook

Pods are constantly terminated in Kubernetes. It happens when the amount of traffic the app receives changes, when deploying new versions or when the node runs out of resources. In order to ensure those terminations will not create downtime for your users, you need to make sure the app handles termination gracefully.

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EKS best practices you should know

My DevOps journey kicked off when we started to develop Datree - an open-source CLI tool that aims to help DevOps engineers to prevent Kubernetes misconfigurations from reaching production. One year later, seeking best practices and more ways to prevent misconfigurations became my way of life.

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6 Best Practices for Effective Readiness and Liveness Probes

The biggest mistake Kubernetes admins make with health probes is configuring the probes the same way for all apps. A payment app does not need to meet the same standards as a log collecting app - so why should their probes be configured the same way?

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Tutorials

EKS 1.22 Upgrade Tutorial

EKS has recently started supporting version 1.22 of Kubernetes. If you want to upgrade, you should know this: Version 1.22 has LOTS of REMOVED APIs. Previously they were deprecated, now they are outright REMOVED, so any workload trying to run using those removed versions will simply fail to run. This means that this upgrade is very dangerous for your production environment.

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Tutorials

ArgoCD Best Practices You Should Know

In this article, we’ll explore some of the best practices of Argo that I've found and learn how we can validate our custom resources against these best practices.

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Tutorials

Kubernetes Error Codes: Must Specify a Volume Type

Many know about Kubernetes, and many use it in their daily workflow. It provides a great backbone for many types of infrastructure, but with that it also brings a lot of complexity. In this guide you’ll be covering what it means to get “Must specify a volume type,” and how it can be resolved.

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Tutorials

Kubernetes Error Codes: Name is Required

Kubernetes has a lot to offer in a DevOps workflow, but the container platform’s many benefits come with configuration challenges and other issues. Crashes at the pod level are common.

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Tutorials

Kubernetes Error Codes: Must Be Unique

As a technology, Kubernetes has significantly simplified the DevOps workflow of managing infrastructure, enabling engineers to concentrate on delivering value to the business.

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Tutorials

Kubernetes Error Codes: Failed to Pull Image

Kubernetes is a complex system with many moving parts. Successfully pulling an image and starting a new pod of containers requires several components to work in parallel. This means that errors can—and will—occur, so it’s important that you’re equipped to deal with them to keep your cluster running.

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Tutorials

Kubernetes Error Codes: Container Name Must Be Specified

One of the biggest challenges with Kubernetes configurations is that they can be hard to express and debug at times. The relationship between Kubernetes constraints is defined in the form of YAML manifest files, which can easily return an error with a small change in environment variables.

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Tutorials

Kubernetes Error Codes: Container Not Found

Because Kubernetes is a complex system, you will occasionally deal with your applications not deploying correctly or not working as planned. Solving such problems, though, can be difficult.

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Tutorials

Kubernetes Error Codes: Field Is Immutable

Kubernetes has revolutionized application deployments, but it’s considered by many to be a very complex product. A lot of things can go wrong with a highly available container-orchestration engine like Kubernetes that’s designed with several components and created to be a distributed solution.

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Tutorials

Kubernetes Error Codes: Selector Does Not Match Template Labels

Kubernetes simplifies running scalable container deployments in production, but it's not always a pain-free experience. Kubernetes is a complex system, which means there are many potential points of failure.

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