# Devops Wala


## Posts

- [EX380](https://devops-wala.com/ex380/)
- [CKAD: NetworkPolicy](https://devops-wala.com/ckad-networkpolicy/): Question: There are 3 Pods, “web”, “db” and “ckad-netpol-newpod”, are running under namespace ckad-netpol. Task: Pod ckad-netpol-newpod in the ckad-netpol namespace to use a NetworkPolicy allowing the Pod to send and receive traffic only to and from the pods web and db. You must not create, modify, delete any network policy while working on this […]
- [StatefulSet](https://devops-wala.com/statefulset/): In this comprehensive video, we dive deep into the concept of StatefulSets in Kubernetes. You may have heard about Deployments, but StatefulSets offer a unique way to manage stateful applications in a cloud-native environment. Throughout this video, you’ll learn what a StatefulSet is, its key features, and the differences between StatefulSets and Deployments. Index IntroductionWhat […]
- [Linux Foundation discount exam coupons](https://devops-wala.com/linux-foundation-discount-exam-coupons/): Linux Foundation: Discount exam coupons 40% Discount Coupon: use code K8S10YEARS at checkoutHurry Up: Offer Ends Soon, July 2024
- [Configure Memory and CPU Quotas for a Namespace](https://devops-wala.com/configure-memory-and-cpu-quotas-for-a-namespace/): Requests and limits   Requests: It means minimum amount of resource it can consume (request). Kubernetes Schedular will check the node if it can create a pod with this minimum resource? Limits: It means, maximum amount of request container can demand. The kubelet (and container runtime) enforce the limit. If application inside the container demands […]
- [Multus CNI](https://devops-wala.com/elementor-665/): Multus CNI By default, Kubernetes supports a single network interface! For some scenario, we need to implement two or three interfaces in the PODs, so that we can connect to different backend services. Multus is an open-source CNI (Container Network Interface) plug-in for Kubernetes that lets you attach multiple network interfaces to a single pod […]
- [Devops-wala](https://devops-wala.com/hello-world/): In this blog, you will find the Docker, Kubernetes, Ansible and Linux courses along with theirs exam preparations and free documentations with practical lab questions and their answers. Besides this, Live project demo with documentation on Devops profile.
- [Cluster Architecture, Installation & Configuration 25%](https://devops-wala.com/cluster-architecture-installation-configuration-25/):    Cluster Architecture, Installation & Configuration 25%   In this post, we will talk about these points.   Manage role based access control (RBAC) Use Kubeadm to install a basic cluster Manage a highly-available Kubernetes cluster Provision underlying infrastructure to deploy a Kubernetes cluster Perform a version upgrade on a Kubernetes cluster using Kubeadm Implement […]
- [CKA Exam - Troubleshooting 30%](https://devops-wala.com/cka-exam-troubleshooting-30/):         CKA Exam – Troubleshooting  30%  
- [CKA Exam = Storage 10%](https://devops-wala.com/cka-exam-storage-10/):   – Understand storage classes, persistent volumes. – Understand volume mode, access modes and reclaim policies for volumes. – Understand persistent volume claims primitive. – Know how to configure applications with persistent storage. If you are interested to learn Volume then you may go through the below videos at the end of this page. However, […]
- [Workloads & Scheduling 15%](https://devops-wala.com/workloads-scheduling-15/): Workloads & Scheduling 15% 1. Understand deployments and how to perform rolling update and rollbacks 2. Use ConfigMaps and Secrets to configure applications 3. Know how to scale applications 4. Understand the primitives used to create robust, self-healing, application deployments 5. Understand how resource limits can affect Pod scheduling 6. Awareness of manifest management and […]
- [CKA exam 2023 -- etcd backup](https://devops-wala.com/cka-exam-2023-etcd-backup/):   Question 3: First, create a snapshot of the existing etcd instance running at https://127.0.0.1:2379, saving the snapshot to /var/lib/etcd-snapshot123.db After that, you need to restore an existing / previous snapshot located at /var/lib/etcd-snapshot-previous.db. solution:  First, we need to identify the etcd pods. Below command we can use. kubectl -n kube-system get pod | grep […]
- [CKA exam 2023 - ClusterRole](https://devops-wala.com/cka-exam-2023-clusterrole/): CKA exam ClusterRole question Question 1: Use context: kubectl config use-context k8s-c1-H You have been asked to create a new ClusterRole for a deployment pipeline and bind it to a specific ServiceAccount scoped to a specific namespace. Task – Create a new ClusterRole named deployment-clusterrole-var, which only allows to create the following resource types: – […]
- [CKA Exam 2023 - Storage Question](https://devops-wala.com/cka-exam-2023-storage-question/):   Volume Question    CKA exam,volume question,Kubernetes exam question, Question 7.  – Create a new PersistentVolume named tata-pv. It should have a capacity of 2Gi, accessMode ReadWriteOnce, hostPath /srv/app-config-var.  – Next create a new PersistentVolumeClaim in Namespace project-tiger named tata-pvc . It should request 2Gi storage, accessMode ReadWriteOnce and should not define a storageClassName. The […]
- [14. What is Volume in Kubernetes & why we need it? - part 1](https://devops-wala.com/14-what-is-volume-in-kubernetes-why-we-need-it-part-1/):  What is Volume in Kubernetes & why we need it? – part 1         Why we need Volume?What is Volume?Types of Volumes? – What is EmptyDir? – What is hostPath? – What is Static Volume?    * PersistentVolume  * PersistentVolumeClaim – What is Dynamic Volume?  We know that, we have one cluster, contains two workernodes. In cluster, […]
- [11. What is Deployment in Kubernetes - part 2 (LAB) ?](https://devops-wala.com/11-what-is-deployment-in-kubernetes-part-2-lab/):  What is Deployment in Kubernetes LAB – part 2     
- [09 ReplicaSet in Kubernetes](https://devops-wala.com/09-replicaset-in-kubernetes/): Hello everyone. My name is Anish Rana and you are watching Kubernetes web series. Today, we’re going to cover one interesting topic, i.e.  “What is ReplicaSet?” First, we will cover the theory part and I cover below topics. Ø What is ReplicaSet?    As I mentioned in my previous topic i.e ReplicationController, where I had informed […]
- [08 What is Namespace in Kubernetes?](https://devops-wala.com/08-what-is-namespace-in-kubernetes/):         What is Namespace in Kubernetes?     1. Understanding of Namespace. 2. What is NameSpace?3. Initial namespaces.4. Where we can use the Namespaces.5. How to create the namespace?6. How to add Quota with Namespace?
- [07 What is ReplicationController in Kubernetes](https://devops-wala.com/07-what-is-replicationcontroller-in-kubernetes/):  What is ReplicationController in Kubernetes     1. What is ReplicationController and why it required ?2. Understand the fields in yaml file.3. How to create Yaml file for ReplicationController?4. How to create ReplicationController from Yaml file?5. How to check the ReplicationController?6. When to use a ReplicationController?7. How to delete the ReplicationController?
- [06 Difference between Create and Apply option in Kubernetes](https://devops-wala.com/06-difference-between-create-and-apply-option-in-kubernetes/):  Difference between Create &Apply option    
- [05 What is POD in Kubernetes](https://devops-wala.com/05-what-is-pod-in-kubernetes/):              What is POD in Kubernetes     1. What is POD.  2. Static POD  3. Dynamic POD  4. CKA exam question  5. CKAD exam question
- [04 Cgroup & Namespaces](https://devops-wala.com/04-cgroup-namespaces/):                  Cgroup & Namespaces     1. How containers get the hardware resources?2. How to container PIDs are separated by other containers?3. What is Cgroup?4. What is namespaces?  
- [03 How to create kubernetes cluster on CentOS 9](https://devops-wala.com/03-how-to-create-kubernetes-cluster-on-centos-9/):  How to create Kubernetes cluster on CentOS 9     Today we will learn:1. Kubeadm2. kubectl3. kubelet4. How to create Kubernetes cluster5. Prerequisite for kubernetes cluster6. Smooth installation of kubernetes cluster on CentOS 9 Stream OS7. Through manual and bash script.8. Bash auto complete for kubelet9. Practicle lab.
- [Kubernetes: CentOS 9 Installation](https://devops-wala.com/kubernetes-centos-9-installation/):         Kubernetes: CentOS 9 Installation      Today we will learn:1. Download & Install the Oracle Virtual BOX on Laptop2. Download CentOS 9 Stream OS3. Create 3 VMs4. Install the CentOS 95. Bind the Mac address on your WIFI router Referenceshttps://www.virtualbox.org/wiki/Downloads https://www.centos.org/download/ #kubernetes#kubernetescourse#kubernetestutorial#kubernetestutorialforbeginners#kubernetes Cluster Create# Kubernetes installation on Laptop
- [01 - Kubernetes Introduction & Architecture](https://devops-wala.com/01-kubernetes-introduction-architecture/):       Kubernetes Introduction & Architecture        Today we will learn:  1. what is Kubernetes and how it works  2. History of Kubernetes  3. Difference between Docker Swarm & Kubernetes  4. Kubernetes architecture 5. Kubernetes components    References : https://kubernetes.io/docs/concepts/    # kubernetes # kubernetes course # kubernetes tutorial # kubernetes tutorial for […]
- [How to enroll for CKA exam ?](https://devops-wala.com/how-to-enroll-for-cka-exam/):                 01  How to enroll CKA exam?   CYBERKUB23CC coupon code valid till 4 Dec 2023 How to enroll CKA exam?   #kubernetes #cka #ckaexam #ckad   Follow the below my Youtube vide for more details:  
- [core-dns in kubernetes](https://devops-wala.com/core-dns-in-kubernetes/): Hello everyone. My name is Anish Rana and you are watching Kubernetes web series. In this video, I’ll try to explain DNS functionality on Kubernetes cluster.   1. Why we use DNS in Kubernetes? 2. Basic information of DNS Kubernetes? In this topic, I will try to explain you how to locate the DNS pods […]
- [13. What is Service in Kubernetes](https://devops-wala.com/13-what-is-service-in-kubernetes/): What is Service in Kubernetes
- [12. What is DaemonSet in Kubernetes](https://devops-wala.com/12-what-is-daemonset-in-kubernetes/):          What is DaemonSet in Kubernetes? What is DaemonSet?Use cases of DaemonSet.Understand the fields in yaml file.How to create Yaml file for Daemonset?How to create DaemonSet?How to check the DaemonSet?Update Strategy for DaemonSetHow to delete the DaemonSet?
- [10 What is Deployment in Kubernetes - part 1?](https://devops-wala.com/10-what-is-deployment-in-kubernetes-part-1/): #kubernetes #kubernetescourse #kubernetestutorial #kubernetestutorialforbeginners #devopstool #features_of_kubernetes #introduction_to_kubernetes #what_is_kubernetes_and_how_it_works? #what_is_kubernetes_cluster #what_is_kubernetes? #why_kubernetes_is_better_than_docker_swarm #why_kubernetes_over_docker #kubernetes_explained_simply #kubernetes_basic_concepts #kubernetes_components_architecture #What_is_Deployment #Understand_the_fields_in_yaml_file_. #How_to_create_Deployment? #How_to_create_Yaml_file_for_Deployment? #How_to_check_the_Deployment? #How_to_upgrade_the_deployment? #How_to_rolling__back_to_a_previous_revision? #How_to_scale_UP/Down_the_deployment? #How_to_delete_the_Deployment? #Use_cases_of_Deployment.
- [Screenwriting: A Career Built on Imagination and Storytelling](https://devops-wala.com/screenwriting-a-career-built-on-imagination-and-storytelling/): Nearly everything you watch—that big blockbuster movie, your favorite television show, all the commercials that pop up in the middle—was written by someone. Before anything goes into production in Hollywood and beyond, it needs to have a structure in place so that the actors know what to do and say, the directors know what to […]
- [10 Guitar Techniques to Take You From Beginner to Pro](https://devops-wala.com/10-guitar-techniques-to-take-you-from-beginner-to-pro/): Almost anyone can pick up a guitar and make it sound, well, like a guitar. Even incorrect strumming techniques will produce a sound, and with enough fumbling around, you might even be able to convince a few folks that you know what you’re doing. But what if you want to take your playing to the […]
- [Knit Coasters: A Fun and Practical Project](https://devops-wala.com/knit-coasters-a-fun-and-practical-project/): Have you ever been at a party where the conversation just dies? After exchanging pleasantries and thoroughly discussing the weather, you scramble for something to say, until you finally give up and just sit in the awkward silence. Wouldn’t it be great to be able to turn to something in your home and say, “Oh, […]
- [Typography: A Letter Perfect Introduction](https://devops-wala.com/typography-a-letter-perfect-introduction/): From the first fonts to modern calligraphy, typography has come a long way and continues to evolve. Learn more about its history, terminology and uses. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam hendrerit nisi sed sollicitudin pellentesque. Nunc posuere purus rhoncus pulvinar aliquam. Ut aliquet tristique nisl vitae volutpat. Nulla aliquet porttitor venenatis. […]

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- [RHCSA: EX200](https://devops-wala.com/linux/rhcsa-ex200/)
- [EX316 : DO316](https://devops-wala.com/ex316-do316/)
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- [Exam Enrollment](https://devops-wala.com/exam-enrollment/): How to enroll for Kubernetes exam Current discount coupon for Kubernetes exams. CYBERKUB23CC coupon code valid till 4 Dec 2023 In this article, I have tried to explain you for CKA exam enrollment. All other exams process are also same.
- [CKAD Exam](https://devops-wala.com/ckad-exam/): Seeking assistance for the CKAD exam? Dive into valuable resources here! 🚀 CKAd Exam Roadmap: 🌟 Application Design: Link🔍 CKAD Part 2: Link🛠  CKAD Part 3: Link📊 CKAD Part 4: Link🔗 CKAD Part 5: Link Access a comprehensive Kubernetes course for FREE: Kubernetes-Playlist Ready to tackle the CKAD exam? Learn how to enroll here: Enroll […]
- [CKA Exam](https://devops-wala.com/cka/):                   CKA Exam pattern   Below is the direct link where you can find all the latest information. https://training.linuxfoundation.org/certification/certified-kubernetes-administrator-cka/ Storage 10%    Understand storage classes, persistent volumes Understand volume mode, access modes and reclaim policies for volumes Understand persistent volume claims primitive Know how to configure applications with persistent storage Troubleshooting 30% Evaluate cluster and […]
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