Docker Kubernetes Archives - Oracle Trainings for Apps & Fusion DBA

Solving Kubectl commands results in error: exec plugin: invalid apiVersion?

February 14, 2023 /
Docker Kubernetes Kubernetes Developer Uncategorized /
By Atul Kumar

📌 This blog post discusses the problem and solution that very few of us encountered while running the kubectl command. 📌 We often see an error message that reads “error: exec plugin: invalid apiVersion client.authentication.k8s.io/v1alpha1″ while using kubectl. 🤓 So, Want to learn how the error can be fixed? ➡ Checkout this blog- https://k21academy.com/kubernetesdev15 , […]

Kubernetes in Production: Top 10 actions you should take

December 23, 2022 /
Docker Kubernetes /
By Atul Kumar

📌 The technology of containers and Kubernetes is ruling the job market. When working in IT, one should be familiar with Kubernetes from DevOps in order to obtain a higher-paying job. 📌 Kubernetes must fulfil a number of requirements in order to be ready for production. It must also have built-in disaster recovery capabilities, be […]

Kubernetes Custom Resource Definition (CRDs): A Complete Overview

November 24, 2022 /
Docker Kubernetes /
By Atul Kumar

📌 Using Kubernetes CustomResourceDefinitions(CRDs), you can expand the Kubernetes API to achieve the desired results . 📌 The process for defining a custom resource is called custom resource definition. This is an effective way to go beyond the Kubernetes installation by default. 📌 When you create a new CustomResourceDefinition, the Kubernetes API Server creates a […]

𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 𝐒𝐭𝐨𝐫𝐚𝐠𝐞: 𝐀 𝐃𝐞𝐭𝐚𝐢𝐥𝐞𝐝 𝐎𝐯𝐞𝐫𝐯𝐢𝐞𝐰

September 10, 2022 /
Docker Kubernetes /
By Atul Kumar

📌 Storage has long been a source of consternation for IT professionals, with issues such as data integrity, preservation, replication, and migration. 📌 Kubernetes storage makes it easy for K8s programmes to request and use storage resources. 📌 Volumes are the foundation of the Kubernetes storage architecture. 📌 Volumes can be persistent or non-persistent, and […]

𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 𝐍𝐚𝐦𝐞𝐬𝐩𝐚𝐜𝐞: 𝐄𝐯𝐞𝐫𝐲𝐭𝐡𝐢𝐧𝐠 𝐲𝐨𝐮 𝐧𝐞𝐞𝐝 𝐭𝐨 𝐤𝐧𝐨𝐰

August 5, 2022 /
Docker Kubernetes /
By Atul Kumar

📌Kubernetes namespaces are a mechanism for isolating groups of resources within a single cluster. Resource names must be unique within a namespace but not across namespaces. 📌 When many teams or projects share a Kubernetes cluster, namespaces provide a means to divide clusters into virtual sub-clusters. 🤓 Want to learn more about 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 𝐍𝐚𝐦𝐞𝐬𝐩𝐚𝐜𝐞? ⚡ […]

[𝐒𝐨𝐥𝐯𝐞𝐝] 𝐄𝐫𝐫𝐨𝐫 𝐟𝐫𝐨𝐦 𝐬𝐞𝐫𝐯𝐞𝐫 (𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐔𝐧𝐚𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞): 𝐭𝐡𝐞 𝐬𝐞𝐫𝐯𝐞𝐫 𝐢𝐬 𝐜𝐮𝐫𝐫𝐞𝐧𝐭𝐥𝐲 𝐮𝐧𝐚𝐛𝐥𝐞 𝐭𝐨 𝐡𝐚𝐧𝐝𝐥𝐞 𝐭𝐡𝐞 𝐫𝐞𝐪𝐮𝐞𝐬𝐭 (𝐠𝐞𝐭 𝐧𝐨𝐝𝐞𝐬.𝐦𝐞𝐭𝐫𝐢𝐜𝐬.𝐤8𝐬.𝐢𝐨)

July 1, 2022 /
Docker Kubernetes /
By Atul Kumar

📌This blog post covers the issue & fix that most of us encountered while configuring the metric server in Kubernetes and after running the kubectl top nodes command. 📌 We often see a kubectl top nodes shows Error from server (ServiceUnavailable): the server is currently unable to handle the request (get nodes.metrics.k8s.io). 🤓 So, Want […]

Auditing In Kubernetes: A Complete Overview

June 23, 2022 /
Docker Kubernetes /
By Atul Kumar

📌 As Kubernetes popularity increases, Kubernetes auditing is a crucial source of information to incorporate into your Kubernetes security strategy. 📌 It provides full insight into all activities occurring within the cluster to security and DevOps teams. 📌 The audit policy specifies standards for the events that must be reported and the data that must […]

Complete Guide on Troubleshooting Kubernetes

May 2, 2022 /
Docker Kubernetes /
By Atul Kumar

📌 In a production environment, you need to manage the containers that run the applications and ensure that there is no downtime. To provide consistent support and service we need to continuously debug and troubleshoot the complete Kubernetes cluster. In this blog, we are going to learn about Kubernetes Troubleshooting. 📌 The process of discovering, […]

𝐏𝐨𝐝 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐒𝐭𝐚𝐧𝐝𝐚𝐫𝐝𝐬 (𝐏𝐒𝐒): 𝐀𝐥𝐥 𝐘𝐨𝐮 𝐍𝐞𝐞𝐝 𝐭𝐨 𝐊𝐧𝐨𝐰

April 26, 2022 /
Docker Kubernetes /
By Atul Kumar

📌 To enhance Kubernetes security, you must regulate and limit the number of pods that may be generated and deployed in your environment. Kubernetes has given a beta feature called Pod Security Policy (PSP) for this purpose, which will shortly be deprecated and replaced with a standard called Pod Security Standards (PSS). 📌 Because PSPs […]

𝐓𝐨𝐩 𝐎𝐩𝐞𝐧 𝐒𝐨𝐮𝐫𝐜𝐞 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐓𝐨𝐨𝐥𝐬

📌 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 is the most used platform among admins and developers. Containerization has made it easier than ever to swiftly design and deploy application environments with Kubernetes. However, security is the most common source of concern when it comes to container adoption. 📌 𝐊𝐮𝐛𝐞𝐫𝐧𝐞𝐭𝐞𝐬 security is all about establishing and implementing security measures to protect […]

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