Kubernetes Interview Questions and Answers
1. What is Kubernetes?
Kubernetes are far more than a forum for containerization. This automates software delivery, size and load control. In fact, this multi-container management method functions well for most cloud supplying organizations and gains from an effective open-source community's contributions. In Go programming languages Kubernetes is published.
2. Explain some features of Kubernetes
Automated scheduling – Intelligent developer for deploying cluster node containers. Self-healing – Could reprogram, remove, and reset dead containers. Automatic roll-outs and retrofits – Allows roll-ups and retrofits. Horizontal scaling – levelling functionality up or down when required.
3. What does a Kubelet mean?
Kubelet is a pod running agent operation. A pod is only a collection of containers on the same host or with other specific tools, including a single Port, volumes, etc. The kubelet is used to identify such containers in the PodSpec. The key goal is to act at each node to maintain safe and working containers and to further promote contact between the nodes of the master and the staff.
4. Explain functionality of clusters
Cluster services with unique configurations are allowed by Kubernetes to implement the necessary state management. Such cluster utilities then execute the network setup. The method includes the following steps:All modifications to be added to the cluster resources are contained inside the implementation package.You register the implementation in the API.The cluster providers now schedule the environmental potsCluster providers also have the correct amount of pads
5. What is the use of Kubelet?
Kubectl is a monitoring device for the clusters in Kubernetes. Usually, "ctl" means electricity. It is a command-line interface which helps you to transmit commands to the group and control the portion of Kubernetes.The Kubelet manufactures the individual machines. The only aim of a kubelet is to ensure that they are all usable in a specified collection of containers.
6. What do you mean by Google Container Engine?
Google Container Engine (GKE) is a software tool for Container server and clusters operating inside the public cloud infrastructure of Steam .. It is a Kubernetes-based open source engine.
7. What node is used in Kubernetes?
A node offers the required infrastructure to operate the pods. The nodes may be positioned on a real or virtual machine as the clusters are represented. The most significant working machine in Kubernetes is a knot and each node is powered by masters components.Presently that you will be up to date on the fundamentals, let 's look at a few questions and answers from the Kubernetes to clarify them.
8. Explain components of Kubernetes Architecture
Kubernetes architecture consists of the master node as well as the worker node. All of these modules provide a range of interconnected facilities. The master component, for example, has a cube control manager, a cube scheduler, a kube apiserver, etc. The worker node includes utilities such as the container runtime, stack and matrix proxy at each level.
9. What do you mean by a Load Balancer?
A load balancer provides a standard way to distribute network traffic among different backend services, thus maximizing scalability. Depending on the working environment, there can be two types of load balancer – Internal or External.
10. Explain heapster
Heapster is a tracking efficiency and evaluation device that is native to the Kubernetes clubs. This functions like every other pod in the cluster to explore and search all nodes from Kubernetes. This container control method works by an on-machine handler.
11. Explain ETCD
Etcd is a store for Kubernetes cluster setup, state and metadata. It is written in Go programming language and at a certain stage describes the cluster condition. The foundation of distributed networks is the datastore.
12. What is kube-proxy?
The kube proxy is a host sub networking feature that allows resources accessible to other components. Kubeproxy handles networking and the termination of master doesn't stop a node from handling traffic, so kube proxy operates with a server in the same manner. The iptables must route the link to the kube proxy and then convert the destination address into whatever is in the endpoints to one of the pods in the service.
13. Explain worker node
The Kubernetes worker node is a task server. This deploys workloads. The tasks will be in the form of international container applications and therefore each container runtime node in the cluster needs to operate, such as the docker. It is possible to have several masters allocated to different nodes or a single master with a single operating node.
14. How is docker related to Kubernetes?
Docker is a program operating database systems that is a virtual database. Once Kubernetes schedules a server, Docker is prompted to load the containers by the kubelet on that server.
15. What do you mean by a Pod?
A pod is the fundamental unit of Kubernetes. A pod is made up of a collection of containers in a pool. Very likely, one main container is operating a line.
16. What are Kubernetes Benefits?
Containers can be managed fairly quickly using the container orchestration platform Kubernetes. We will satisfy customer requests quicker and more consistently by deploying the applications.
17. Explain Namespace
The namespace of Kubernetes is used in the framework in which many users operate on different projects in geographically large regions. The name space separates the cluster resources among many applications.
18. What is Google Kubernetes Engine?
Google Kubernetes Engine for the management and orchestration of Docker container systems. GKE also helps one to orchestrate Google Public Cloud database clusters.
19. Explain Minikube
The Minikube is simple for Kubernetes to operate locally. The Minikube operates a single-node cluster of the Kubernetes in a virtual machine.
20. Why do you think Kubernetes is used?
Kubernetes will operate bare wire, OpenStack, Microsoft, Vmware, AWS, or on-site clouds.It helps prevent provider locking problems as any vendor-specific APIs or resources may be used even in cases of abstraction by Kubernetes, for instance load balancing and storage.You will use it to deliver and upgrade software without downtime.You will make sure containerized apps operate when you like and when and help you locate the content and software you want to function with.
21. Explain Kube-apiserver
Kube-apiserver is a Kubernetes API server for the setup and testing of API artifacts, including servers, controls, etc. The front end to the mutual area of the cluster is given from which modules communicate.
22. What do you mean by Labels?
Labels are a set of keys representing other meanings. Key principles are related to pods, replication controls and the resources concerned. In general, during the creation time labels are added to an object. Users can change them at the moment.
23. What are some Kubectl commands?
kubectl attachkubectl apply,kubectl cluster-info,kubectl config,kubectl config current-context,kubectl autoscale,kubectl config set ,kubectl annotate
24. What are Stateful sets?
The stateful set is an application-management API object for working load. It is also suitable for managing deployments and scaling the pod set. The state information and other information on static pods are stored in the disk storage that connects to the statutory set.
25. Explain Orchestration and Prometheus
Orchestration in kubernetes describes the function of all containers as an automated process. This is used for software focused on cluster-oriented microservices.Prometheus is a surveillance and alert program. You can contact one's structures to record, condense and securely manage a data in a real measured data.
26. What is GKE used for?
It can be used to build container clusters for docker applications.Resize controls of the program.The container clusters are revised and modified.GKE may be used to build replication controllers, workers, resources, load balancers or container pods.