Kubernetes - DevOps Blog (Page 2)

Kubernetes

A collection of 102 posts

Kube-Proxy: What Is It and How It Works

Kube-Proxy: What Is It and How It Works

Networking is a crucial part of Kubernetes. Understanding how different network components work will help you configure your cluster to meet your application’s needs. Behind a Kubernetes network, there is a component that works under the hood, translating your Services into usable networking rules. This component is called Kube-Proxy.

How to Restart a Pod in Kubernetes

How to Restart a Pod in Kubernetes

Restarting a Pod is a common operation in Kubernetes. There are several reasons why you might want to restart a Pod. For example, you might want to update the container image to a newer version or modify the environment variables to adjust how your application works. In this blog post,

Kubectl Rollout Restart: What Is It and How to Use It?

Kubectl Rollout Restart: What Is It and How to Use It?

In Kubernetes, kubectl rollout restart is a command used to start a new rollout process for three specific Kubernetes objects: Deployment, DaemonSet, and StatefulSet. A rollout process essentially means a gradual, step-by-step recreation of Pods — The old Pods are not removed entirely until the new Pods are running successfully. This

How to Debug CrashLoopBackOff in a Container or Pod

How to Debug CrashLoopBackOff in a Container or Pod

When trying to get your containerized application up and running in a Kubernetes cluster, you may run into errors that prevent the application from running. One such error is CrashLoopBackOff. In this blog post, we’ll learn how to debug the CrashLoopBackOff status of a Pod. Our approach? We’ll

Vertical Pod Autoscaler (VPA)

Vertical Pod Autoscaler (VPA) in Kubernetes Explained through an Example

Kubernetes provides a shared pool of resources allocated based on how you configure your containerized application. The allocation process is handled by a Scheduler, which checks the resource requirements of each container and selects an appropriate node to deploy the container’s pod. You define a container’s resource requirements

kubectl logs: How to Get Pod Logs in Kubernetes (With Examples)?

Kubernetes Logs

kubectl logs: How to Get Pod Logs in Kubernetes (With Examples)?

Kubernetes is a container orchestration tool used to deploy and manage containerized applications. Like any software, these applications can sometimes fail or not perform as expected due to various reasons. When such failures occur, it’s important to identify and rectify the issue quickly. One key aspect of troubleshooting involves

kubectl cp: How to Copy File From Pod to Local (With Examples)?

kubectl cp: How to Copy File From Pod to Local (With Examples)

The kubectl cp command is a powerful tool in Kubernetes that you can use to copy files between the local system and a Pod. There are various use cases of this command, including: * Debugging: You can use kubectl cp to copy log files from a Pod. In case the Pod

How to Use Kubectl Delete Deployment (With Examples)?

How to Use Kubectl Delete Deployment (With Examples)

Kubernetes is a popular container orchestration tool used to deploy and manage containerized applications at scale. In Kubernetes, a Deployment describes a deployed application. It is a higher-level abstraction that manages an application’s desired state, such as the number of replicas (copies), the container image to use for the

Kubectl Create Namespace: How to Create a Custom Namespace?

Kubectl Create Namespace: How to Create a Custom Namespace?

In this blog post, we'll learn how to create a custom Namespace in Kubernetes using the "kubectl create namespace" command. But before we do so, let's take a step back and understand what a Namespace is and why it's useful. What Is

Kubectl Exec: How to Execute Shell Commands Into a Container (With Examples)?

Kubectl Exec: How to Execute Shell Commands Into a Container (With Examples)?

Kubernetes is a powerful container orchestration platform for easily deploying and managing containerized applications. However, managing containerized applications is about more than just getting them up and running. Sometimes, you’ll need to interact with the containers to perform important tasks, such as debugging issues or modifying files or directories.

What Is Kubectl Port-Forward and How Does It Work?

What Is Kubectl Port-Forward and How Does It Work?

Kubernetes is a popular container orchestration platform for deploying and managing containerized applications. When you deploy a containerized application to a Kubernetes cluster, it runs inside a Pod. By default, Pods are not exposed to the public internet. If you want to make the application running inside the Pod accessible

What Is Kubernetes DaemonSet and How to Use It?

What Is Kubernetes DaemonSet and How to Use It?

In Kubernetes, a Deployment is a higher-level abstraction built on top of ReplicaSets. In other words, a Deployment provides a simpler, higher-level interface for managing and scaling applications, while ReplicaSets are the lower-level building blocks that a Deployment uses to achieve this. When you create a Deployment, you specify the

ClusterIP vs NodePort vs LoadBalancer: Key Differences and When to Use Them?

Kubernetes Services

ClusterIP vs. NodePort vs. LoadBalancer: Key Differences and When to Use Them?

In Kubernetes, there are three commonly used Service types: ClusterIP, NodePort, and LoadBalancer. These Services provide different ways to make Pods accessible to other Pods within the cluster and to clients outside of it. In this blog post, first, we’re going to talk about Kubernetes Services — what they are

What Are Objects Used for in Kubernetes? 11 Types of Objects Explained.

What Are Objects Used for in Kubernetes? 11 Types of Objects Explained.

Kubernetes is a container orchestration tool used to deploy & manage containerized applications in an automated way. One of the key concepts in Kubernetes is the "desired state," which refers to the configurations of the applications that you want to deploy and run. Essentially, it's the

What Is Kubernetes Headless Service (With Examples)?

What Is Kubernetes Headless Service (With Examples)?

Kubernetes is a powerful platform for managing containerized applications. One of its crucial components is the Service object, which enables communication (networking) between different parts of an application. In this blog post, we will dive into the concept of headless Services. We will find out what they are, how they

Kubernetes Services: Definitions & Examples (2023)

Kubernetes Services: Definitions & Examples (2023)

Kubernetes is a platform that helps you run your containerized applications on a massive scale. A key aspect of this is ensuring that different parts of your apps can easily communicate. Kubernetes does this by using Kubernetes Services. These Services allow smooth communication between components within the cluster and between

What Are Kubernetes KEPs?

What Are Kubernetes KEPs?

Kubernetes is a popular container orchestration platform, which is constantly evolving and expanding. New features are regularly added to improve its capabilities and address the changing needs of its users. So, how does a new feature make it into Kubernetes? Well, it all starts with a Kubernetes Enhancement Proposal (KEP)

Kubernetes Networking: Fundamental Concepts Explained (2023)

Kubernetes Networking: Fundamental Concepts Explained (2023)

Networking is the backbone of modern technology. It's what allows communications between devices and applications, whether they're sitting next to each other or on opposite sides of the world. Essentially, networking is all about connecting things together. In the context of Kubernetes, networking is even more

CKA vs CKAD vs CKS

CKA vs. CKAD vs. CKS – What is the Difference

According to recent statistics, there has been a 127% increase in the number of Kubernetes clusters hosted in the cloud in 2022. This indicates the growing popularity and adoption of Kubernetes as a container orchestration platform. In this article, we'll look at the Kubernetes certifications offered by the

DevOps vs Agile - What’s the Difference?

DevOps vs. Agile - What’s the Difference?

If you are in the tech industry, you have probably heard the terms "DevOps" and "Agile" thrown around a lot. But what do they actually mean, and how are they different? That's what we are here to explore today. In this post, we will

Best Kubernetes Books

7 Best Kubernetes Books of All Time in 2023

In the past few years, container technology has been rapidly adopted across all kinds of organizations. As a result, many businesses now run their services on Kubernetes, Google’s popular container management system. When companies adopt the DevOps way of doing things, it's almost guaranteed they'll

What is Kubernetes Deployment?

Kubernetes Deployment: Strategies, Explanation, and Examples

In Kubernetes, you can deploy a container in a pod with a simple one-line command. This simplicity is what makes Kubernetes a great container orchestration tool. However, when you want your application to scale up or down, maintain replicas, and use custom services, you need a deployment. In this blog