Category Archives for Docker Kubernetes

Kubectl_ErrorRefused

[Solved] The connection to the server localhost:8080 was refused – did you specify the right host or port?

If you are facing this issue we are here to help… Check out our blog at – https://k21academy.com/kubernetes53 and resolve your queries. If you are an Admin, Architect, or Tester, then attend the FREE Class for Docker & Kubernetes Administrator (CKA) 👉 K21academy.com/kubernetes02 FREE Telegram group at https://t.me/k21dockerkubernetes

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Kubernetes Health Check with Readiness Probe and LivenessProbe

🦠In a recent study, scientists have concluded that the Coronavirus also infects the Kubernetes pods 🤯 🩺 That is why we need to do Health Check for Kubernetes! Of course, I was kidding; but a health check or probe is indeed a method of checking the health of a Kubernetes pod. 🩹 What is Health […]

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Docker Container

Container Image Security: An Overview, Best practices, Image Scanning Tools

What is a Container? Containers, in simple terms, are the objects that package your application and its dependencies and help you run them anywhere you want! What is a Container Image? A container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system […]

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kube bench CIS kubernetes

Secure and Harden Kubernetes, AKS and EKS Cluster with kube-bench, kube-hunter and CIS Benchmarks

🛡️Security is a concern that never fades away! And Kubernetes is no exception. ☸️ Is security a concern in Kubernetes? Well, yes and no. No, because it doesn’t come with the most secure environment by default. Yes, since configuring or clusters with the CIS Benchmarks and 3-party tools can be hardened and secured. ✅ What […]

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kubernetes Ingress

Secure Kubernetes with Ingress

We can write our own routing rules, which are implemented in seconds, and these rules also can be utilized in the application source code. Furthermore, endpoints like REST-APIs, static content, and dynamic web front ends may all be accessed via one IP address, potentially serving content for multiple domain names. This is often precisely what […]

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day1 and day2 cka/ckad

Docker & Kubernetes [CKA/ CKS/ CKAD] Q/A : Day 1 and Day 2 Live Session Review

📍 What are the monolithic applications and drawback of it? How we can solve these drawbacks using microservice deployment? What is the difference between Monolithic & Microservice Application? Why we are using microservice-type application deployment for Kubernetes i.e. CKA, CKAD, and CKS? 📍 Docker is a containerization platform that is used to create a container. […]

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day 3 and day 4

Docker & Kubernetes [CKA/ CKS/ CKAD] Q/A: Day 3 and Day 4 Live Session Review

📍 When a container is created it will go through various life stages that are called the Container lifecycle. 📍 In traditional bare-metal applications, storage is just a device that is attached to an image. But docker containers handle storage in different ways. 📍 The docker image usually contains a writable layer, which is only […]

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Prometheus Kubernetes Monitoring

Kubernetes Prometheus Monitoring: Metrics, Scrape and Installation with Helm

🤯 Monitoring is crucial whether you are experimenting or using the production-based cluster. But it is no easy task if you want a human to do it as many pieces make a production-grade environment. 🤔 But then Kubernetes has it all, right? Well, yes and no! Yes, because it offers an official Kubernetes Dashboard. However, […]

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Kubernetes Operator

Kubernetes Operator: An Overview, Stateful and Stateless Applications

Kubernetes is the talk of the hour, needless to say, we all have realized the importance. Kubernetes’s idea was to automate stuff and reduce human intervention. 📎 Kubernetes Operator A Kubernetes operator is a method of packaging, deploying, and managing a K8s application. It is application-specific and extends the functionality of the Kubernetes API on […]

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Docker Tutorial Full Course for Beginners

Docker Tutorial for Beginners: 5 Hour Full Course [Hands-On Labs]

Are you looking for resources to learn Docker? Docker has been a revolutionary invention and is at the top of the chart in application deployment. As of today, Everyone is adopting Docker containers. If you are still using the legacy system, you are not doing justice to resource optimization. What is Docker? A Docker container […]

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