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DevOps

DevOps is a set of practices that combines software development (Dev) and IT operations (Ops) aimed at shortening the systems development life cycle and providing continuous delivery with high software quality. It emphasizes collaboration, automation, and integration between developers and IT professionals to improve the speed and quality of software deployment.

Kubernetes Error: validation failed – no matches for kind ‘Deployment’

Updated: Jan 31, 2024
Understanding the Error Encountering ‘no matches for kind “Deployment”‘ indicates that Kubernetes does not recognize the ‘Deployment’ resource in the provided context. Centered around invalid API......

Kubernetes: How to manually run a schedulated job on demand

Updated: Jan 31, 2024
Introduction As the DevOps landscape continuously evolves, Kubernetes remains a front-runner in orchestrating containerized applications. Not just a tool for automating deployment and scaling, Kubernetes also offers robust job......

Minikube cluster: Connecting to an outside database (MySQL, PostgreSQL, etc.)

Updated: Jan 31, 2024
Introduction When developing applications within a Minikube cluster, it is often necessary to connect to external resources such as databases. Depending on your setup, you might need to access a MySQL, PostgreSQL, or another type of......

Fixing Kubernetes Error: ImagePullBackOff or ErrImagePull

Updated: Jan 31, 2024
Introduction As Kubernetes continues to gain popularity, developers and operations teams working with containers must understand how to debug and resolve common issues. Two frequent errors encountered when working with Kubernetes......

Kubernetes error: Service account ‘default’ is forbidden

Updated: Jan 31, 2024
Understanding the Service Account Error The “Service account ‘default’ is forbidden” error typically occurs in Kubernetes when a service account does not have sufficient permissions to perform an operation. This......

Solving Kubernetes error x509: Certificate signed by unknown authority

Updated: Jan 31, 2024
The Problem The x509: Certificate signed by unknown authority error in Kubernetes often occurs when the cluster components are not able to authenticate the integrity of the certificates being presented. This error can arise in various......

Kubernetes: How to list all pods in all namespaces

Updated: Jan 31, 2024
Introduction Whether you’re operating a small-scale project or shepherding a large enterprise system, savvy navigation and command efficiency within Kubernetes is critical. As resources multiply and complexity accumulates, the......

How to test Kubernetes SSL (HTTPS) locally on your computer

Updated: Jan 31, 2024
Introduction Secure Sockets Layer (SSL), which includes its successor, Transport Layer Security (TLS), are protocols for establishing authenticated and encrypted links between networked computers. In a Kubernetes context, it’s......

How to view the logs of a Kubernetes pod (with examples)

Updated: Jan 31, 2024
Introduction Understanding how to inspect logs of a Kubernetes pod is essential for troubleshooting and ensuring your application runs smoothly. In this tutorial, we’re going to cover the basics and move to more advanced examples......

Auto Alert when a Kubernetes Job is Complete/Failed (with examples)

Updated: Jan 31, 2024
Introduction Kubernetes has become the de facto standard for orchestrating containerized applications. While it seamlessly manages the lifecycle of applications, teams frequently need to know the outcome of their Kubernetes jobs......

Sharing storage across multiple pods in Kubernetes

Updated: Jan 31, 2024
Introduction Kubernetes, the open-source platform designed to automate deploying, scaling, and operating application containers, is known for its powerful orchestration capabilities. However, when it comes to managing storage, things......

Understanding kubectl port-forward (with examples)

Updated: Jan 31, 2024
Introduction kubectl port-forward is a powerful command used within the Kubernetes ecosystem to help developers access services from their local machine. This command simplifies a great deal of development and debugging processes by......