A ReplicaSet is a process that runs multiple instances of a Pod and keeps the specified number of Podsconstant. Its purpose is to maintain the specified number of Pod instances running in a cluster at given timeand to prevent users from losing access to their application when pPod fails or is inaccessible. create -f rs.yamlkubectl get rs replicasetkubectl get Pods Q2. What happen when you pause a deployment using rollout? K8 enables you to pause a deployment. You can then

Replica sets is to ensure defined no. of identical pods are always available, even if some of the pods gets corrupted and becomes unavailable, it is restarted by replica sets again. Example – In case of node failure where 1 node fails, replica-set ensure, pods of that node is started in another node. In case of deployment rollout, replica sets ensure new pods gets created with new version.

kubectl attach kubectl exec We can attach to the main process run by the container, which is not always bash. Which is the PID1. It allows us to execute any process within the container Attach to the one running (no choice) Run any command you want to execute.

We use PKI certificates for authentication over TLS in Kubernetes. If we install Kubernetes with “kubeadm” command, the certificates that your cluster requires are automatically generated. You can also generate our own certificates. How Certificates are used in Kubernetes Cluster: Client certificates for the kubelet to authenticate to the API server Server certificate for the API server endpoint Client certificates for administrators of the cluster to authenticate to the API server Client certificates for the API server to talk to

Kubectl Exec: In addition to being able to attach to existing processes inside a container, the “exec” command allows you to spawn new processes inside existing containers Kubectl attach: In addition to interactive execution of commands, you can now also attach to any running process. Like kubectl logs, you’ll get stderr and stdout data, but with attach, you’ll also be able to send stdin from your terminal to the program

Users Enters Private Key Password. Client retrieves private-key and uses it to create evidence(“digital signature”) Client sends certificate and evidence across network Server uses certificate and evidence to authenticate the users identity Server authorizes access for authenticated identity

How certifcations based auth works??In Certification based authentication, digital certificates are used to validate a user, machine or application, before granting access. These are easy to create, delete or rollback. Certificate based authentication is fast and easy to use. Write a diff between Create vs Apply and Put Vs Post and define IDEOMPOTENCY?Put:- in case of put create new object. it is ideompotent. it will replace a object.Post:- insert or update , even if object is already present. it is

what is Kubernetes: Container Orchestrator EngineWorkload PlacementInfrastructure AbstractionDesired StateKubernetes is originally designed by google and later acquired by CNCF-2014 with open source.Kubernetes called as k8sKubernetes is an orchestrator tool to manage container workloads usually hosted on multiple hosts. it can manage 1000s of container workloads Why KubernetesControlling resource consumption by application or teamEvenly spreading application load across a host infrastructureAutomatically load balancing requests across the different instances of an applicationMoving an application instance from one host to another if there

What is Kubernetes ?-Kubernetes is a container orchestration tool which was intially developed by Google and then dontated to CNCF.-Kubernetes is also an orchestration tool for microservice apps-With kubernetes we can over come scalability challenges that comes with containers.-With kubernetes we can acheive Auto scaling, load balacning, self-healing.-Few benefits of kubernetes on a high level note are.. It enhances productivity, centralized control over cluster, security, scalability, portability.– Why Kubernetes ?-Kubernetes can be used to overcome the challenges that comes with

What is Kubernetes? Kubernetes is an open sourced platform for managing containers. K8s is developed by Google but now it is managed by CNCF. It is written in Go/Golang It overcomes the docker challenges like managing networking, self healing and managing containers. Maintains desired state of the application. Why we need Kubernetes? Highly scalable and manged application. Speed of deployment. Deployments are quick and easy to manage. It has the ability to respond over the changes, in seconds. It has

What is Kubernetes? 15 PointsWhy Kubernetes? 10 PointsHow Kubernetes works? All components and roles of their componentsWhat is POD? – 15 Points What is Kubernetes: Kubernetes is container orchestration tool It do workload(Container) Placement Kubernetes help to manages infrastructure with Infrastructure Abstraction. Kubernetes will help us to get the desired state. It has self healing and help us with automated scaleup and rollbacks. Kubernetes gives us speed of in deployment where a deployment can be done in a matter of

What is Kubernetes:Kubernetes is born in google and later purchased by cncf and has a wide community support.Its a container orchestration which manages containers.helps provisioning and deployment of containers in pods.helps ensuring containers are up and running at all times through health checks.ensures all the pods are functioning properly by distributing load evenly between them.provides self-healing / auto-scaling capabilities.Provides cluster capabilities for High availability of kubernetes master.it provides 4 major components which helps control plane manages all worker nodesKubernetes works

What is Kubernetes ? Kubernetes is borned by Google It is Open Source platform It is cncf product It overcomes challenges like scalability challenges We can run 1000 computers via Kubernetes It can help running multiple container with same port. It will resolve auto healing in case of any failure It solve networking challenge also It will help managing multiple docker host Why Kubernetes ? It helps to run multiple docker container it worked in desired state Speed of deployment

What is Kubernetes ? Kubernetes is an orchestration tool. Master includes 4 services/tools 1. api server 2. etcd 3. controller 4. scheduler worker/node contains 3 services/tools 1. kubelet 2.kubeproxy 3. docker runtime Worker node can also be called as workstation or minions. Master can be called as control plane also. All the requests are served by api server. Etcd is key value store, which is updated by api server. Etcd can also be used as ditributed data store in a

Why Kubernetes ? Containers were solving the problem that we are facing with Vms , such as Uptime was very quick as well as stats were low but there were several issues . Container technology were not providing the scaling , As the docker host can manage the containers only on it’s host machine, It was becoming difficult for scaling the containers. if we deploy containers having same image for the application ( ex . nginx , mysql ) on

Q: What is Kubernetes? A: Kubernetes is open source container orchestration tool, which helps to manage and automate multiple process for container management, K8s has changed the way we use to work on servers operating system, According to some experts it’s a new Server OS and replacement of Linux. But in my word K8s is just a container manager which is created integrating multiple components. It’s agile, highly scalable easy to manage and deploy. Q. Why Kubernetes? A. There are

What is Kubernetes? Kubernetes is opensource Kubernetes is container orchestration tool Kubernetes can auto scale container Kubernetes can auto heal container Why Kubernetes? How Kubernetes works? All components and roles of their components Master Node Minions or Worker Node etcd api-server controller scheduler kubelet kube-proxy kubectl Container Runtime What is POD? POD is single or set of tightly coupled containers.

What is Kubernetes? Its a open source software We can manage containers with kubernetes We can automate deployment & configure scaling with this. We have master & node structure in Kubernetes. master has four components nodes has PODS & containers we can schedule task with scheduler in master we can manage microservice with this we can setup autoscale with this it can deploy & scale faster Why Kubernetes? we can schedule task with scheduler in master we can manage microservice