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💾 ►►► DOWNLOAD FILE 🔥🔥🔥🔥🔥 See the helpful list of each commonly used category or component of Kubernetes (K8S) with appropriate kubectl commands for quick reference! This cheatsheet will serve as a quick reference to make commands on many common Kubernetes components and resources. You can use the full command for an object. See also: Kubectl overview and JsonPath guide. Creating Objects. $ kubectl create -f ./ # create resource(s) in a json or. Kubectl Cheat Sheet: 10 Critical Commands & Examples. The kubectl command line tool can help you perform almost any action on your Kubernetes cluster. 9 If you are a student who is just starting off with their journey with DevOps or you are a professional who wishes to switch to DevOps or you are a learner looking to enhance their knowledge about Kubernetes, then you are at the right place. Kubernetes aka K8s is one of the buzzing technologies now, before moving onto the cheat sheet it is essential to brush up on your basics by understanding what Kubernetes is, what are its uses and how does it help? Let's start with the formal definition first, Kubernetes is a portable, extensible, open-source platform for managing containerization workloads and services that facilitates both declarative configuration and automation, letting you run distributed systems resiliently with scaling and failover for your application. Don't be scared of the jargon used in the definition above. To simplify it we can say that Kubernetes is simply a container orchestrator that makes sure that each container is where it is supposed to be and that the containers work properly. This can be considered analogous to the conductor that manages everything in an orchestra for example. The analogy between Kubernetes and an orchestra is quite helpful, just like the orchestra conductor makes sure that the music is as per the composer's requirements, Kubernetes ensures that the services are running smoothly the way an app developer wants. Kubernetes came into the picture after the Software development teams started switching from monolithic and microservices architecture to containerization because of scalability and deployment issues. Containerization does solve the issue of scalability, downtime and dependency management quite efficiently however there are still some issues that remain unsolved. Upgrading the container is quite easy, you can simply create a new version of the container and deploy it in place of the old one, however, the problem is how to do upgrades without downtime? That's how Kubernetes comes to the rescue! Kubernetes provides you with a framework to run distributed systems resiliently. It takes care of scaling and failover for your application, provides deployment patterns, and more. For example, Kubernetes can easily manage a canary deployment for your system. A Node is a worker machine in Kubernetes and may be either a virtual or a physical machine, depending on the cluster. Each Node is managed by the control plane. A Node can have multiple pods, and the Kubernetes control plane automatically handles scheduling the pods across the Nodes in the cluster. Pods are the smallest deployable units of computing that you can create and manage in Kubernetes. In Kubernetes, namespaces provide a mechanism for isolating groups of resources within a single cluster. Names of resources need to be unique within a namespace, but not across namespaces. In Kubernetes, a Service is an abstraction which defines a logical set of Pods and a policy by which to access them sometimes this pattern is called a micro-service. A Deployment provides declarative updates for Pods and ReplicaSets. The typical use case of deployments are to create a deployment to rollout a ReplicaSet, declare the new state of the pods and rolling back to an earlier deployment revision. A DaemonSet ensures that all or some Nodes run a copy of a Pod. As nodes are added to the cluster, Pods are added to them. As nodes are removed from the cluster, those Pods are garbage collected. Deleting a DaemonSet will clean up the Pods it created. Logs are useful when debugging problems and monitoring cluster activity. They help to understand what is happening inside the application. A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. As such, it is often used to guarantee the availability of a specified number of identical Pods. Kubernetes is a portable, extensible, open-source platform for managing containerization workloads and services that facilitates both declarative configuration and automation, letting you run distributed systems resiliently with scaling and failover for your application. Knowing Kubernetes is a must-have skill whether you are a developer, a tester or a DevOps engineer, I hope this article has helped you out. If you are preparing for your interviews as a fresher or if you are an experienced person looking to switch jobs, then InterviewBit is the right place to start. It has several tracks including Programming, System Design, Puzzles and Scripting along with company-specific preparation guides and fast track courses. In Kubernetes, each Pod has an IP address. A Pod can communicate with another Pod by directly addressing its IP address, but the recommended way is to use Services. By default, The pods don't get scheduled when a node is tainted, however, you can start applying tolerations to the pod spec using the command. Load balancing is a way to distribute the incoming traffic into multiple backend servers, which is useful to ensure the application available to the users. Personalised feedback report with solutions Real life Interview Questions Identify exact topics to improve. Before you go! Take this "Kubernetes Kubectl Cheat Sheet" interview guide with you. Download PDF. Enter the name of your college. Type to search. Computer Science. Information Technology. Mathematics and Computing. Before After Forgot Password. Learn Kubernetes: Basics to Advanced Concepts 1. Kubernetes Terminology 2. Kubernetes Commands 3. Changing Resource Attributes 4. For Cluster Introspection 5. Interacting with Deployments and Services 6. Copy files and directories to and from containers Frequently Asked Questions 7. How can containers within a pod communicate with each other? If a node is tainted is there a way to still schedule the pods to that node? What is the role of Load Balance in Kubernetes? Kubernetes MCQ Questions. Crack your next tech interview with confidence! Kubernetes Terminology Terms that you should be familiar with before starting off with Kubernetes are enlisted below: Terms Explanation Cluster It can be thought of as a group of physical or virtual servers where Kubernetes is installed. Nodes There are two types of Nodes, Master node is a physical or virtual server that is used to control the Kubernetes cluster. Worker node is the physical or virtual server where workload runs in given container technology. Pods The group of containers that shares the same network namespaces. Labels These are the key-value pairs defined by the user and associated with Pods. Master It controls plane components to provide access points for admins to manage the cluster workloads. Service It can be viewed as an abstraction that serves as a proxy for a group of Pods performing a "service". Since now we have a fair understanding of what Kubernetes is, let's now jump to the cheat sheet. Kubernetes Commands Viewing Resource Information: 1. Commands Description kubectl get node To list down all worker nodes. Commands Description kubectl get po To list the available pods in the default namespace. Commands Description kubectl get services To list one or more services. Command Description kubectl get ds To list out all the daemon sets. Events Kubernetes events allow us to paint a performative picture of the clusters. Commands Description kubectl get events To list down the recent events for all the resources in the system. Logs Logs are useful when debugging problems and monitoring cluster activity. ReplicaSets A ReplicaSet's purpose is to maintain a stable set of replica Pods running at any given time. Service Accounts A service account provides an identity for processes that run in a Pod. Changing Resource Attributes Taints: They ensure that pods are not placed on inappropriate nodes. Labels: They are used to identify pods. Click here to download. Frequently Asked Questions 7. The init containers will set a stage for you before running the actual POD. Wait for some time before starting the app Container with a command like sleep Clone a git repository into a volume. All of the above. Kubectl run. Kubernets get deployment. None of the above. Which of the following runs on each node and ensures containers are running in a pod? Kubectl deploy. Kubectl expose. Present volume claim. Persistent volume claim. Persistent volume class. Namespaces are used for dividing cluster resources between multiple users? Which of the following forms the core Kubernetes objects? Which of them is a Kubernetes Controller? Rolling update. What is the default range of ports used to expose a NodePort service? Personalised feedback report with solutions. Real life Interview Questions. Identify exact topics to improve. Attend Free Class. Got suggestions? We would love to hear your feedback. Your feedback is important to help us improve. Close Submit Feedback. Unlock the complete InterviewBit experience for free. Sign Up Using. Or use email. Free Mock Assessment Powered By. Fill up the details for personalised experience. Phone Number. Please verify your phone number. By clicking on Start Test, I agree to be contacted by Scaler in the future. Already have an account? Log in. Powered By. Instructions from Interviewbit. Start Test. There are two types of Nodes, Master node is a physical or virtual server that is used to control the Kubernetes cluster. It controls plane components to provide access points for admins to manage the cluster workloads. It can be viewed as an abstraction that serves as a proxy for a group of Pods performing a "service". To run command in first Pod and first container in Deployment single- or multi-container cases.