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

Kubernetes is a container orchestration tool which can orchestrate containers across multiple hosts. It provides scalibilty. It provides service. It provides networking. It can manage the worker nodes. Better use of Hardware. Automate the Deployment Process. AutoHeal and Autoscale. Supports multiple container registry. Database can managed very easily & can see the data. Why Kubernetes? Spins up a container within a sec. It provides scalibilty. It provides service. It provides networking. It can manage the worker nodes. Better use of

what is kubernetes ? In a microservice architecture if we are running contanierized application workload, kubernetes can help to manage those container workloads hosted on multiple nodes, it works as an orchestrator for container workloads and manage the lifecycle, operations, security, networking, auto-scaling of pods kubernetes was originally designed by google and later acquired by CNCF who manages it now. kubernetes was written in Go/Golang Kubernetes is an orchestrator tool to manage container workloads usually hosted on multiple hosts. it

what is k8s? k8s is a platform where we orchestrate containers.Used for automating the deployments.Scaling and management of containerized applicationsComprises master Node and Worker Node.Platform where you can declare your desireOriginates from Greek word–>helmsman which means pilot why k8s? We need k8s to: manage the containersEnsure the availabilty(no downtime)helps with cluster storagehelps with self healingload balancing how it works? k8s have two parts overall i.e master and Worker Node Master comprises:kube apiserver–>talks to worker node(request is passed through api server),

What is Kubernetes? Kubernetes is container orchestration toolIt enables to run multiple container with network enabled communicationIt is open source tool which was developed by google and transferred to cncfKubernetes work on master and node configurationMaster has components : controller, apiserver, scheduler, etcd(kube store)Atomic unit in kubernetes is podIt works like helmsman Why Kubernetes? Kuberntes help in container orchestration which means it helps to place pods on different nodes in same network, so it resolves netorking issue which is there

What is Kubernetes?Open source Container-orchestration engine from Google Why Kubernetes? way to manage microservicesway to manage multi-node containers How Kubernetes works? Control planeapi-server (Collection of k8s APIs)kube-controller-managernode-controllerfew other controllers as wellscheduler (Allocated container to nodes)etcd (KV pair) (Brain of cluster)Worker Nodeskubelet (Manages node)kube-proxy (Runs on each worker node. Enables n/w communication b/w nodes)docker/rkt (Container runtime)OthersDNS What is pod? Lowest (Atomic) unit of k8sCan contain one or more containersLives as long as there is at least one container running

What is Kubernetes?The word is originated from Greek, meaning “helmsman”. It’s an open-source container orchestrator tool that automates Linux container operations. It eliminates many of the manual processes involved in deploying and scaling containerized applications.The platform was first developed by a team at Google and later donated to the CNCF. Why Kubernetes? Kubernetes eases the burden of configuring, deploying, managing, and monitoring even the largest-scale containerized applications.(In 1000s) It also helps IT pros manage container lifecycles and related application lifecycles, and issues including

What is kubernetes? – Kubernetes is a tool developed by google to manage a high availablity of a application  – its is developed on a same genetics as borg and omega on which Google runs its higly scalable application – in days when there is an intro to contanerised world and we were to spin up our infra / app using containers in a matter of sec for DEV & QA environments,   there was a question to manage these containers in a complex environment like PROD – Kubernetes comes in picture then and perfectly fits in this secenerio and manages the containers in a efficient manner including networking, securities aspects Why Kubernetes?– There is a time when its difficult to manage a containers in a complex environment like PROD – here comes the kubernetes which ease the infra complexity. – it help to provide a highly scalable environment with a minimum downtime – it also makes easier to establish the effective networking communications between the different nodes & pods. How Kubernetes works? Kubernetes has below main components in its architecture. MASTER :   a. Apiserver : It is the main front end component of kubernetes.We can say its a bridge that is connecting all components within kubernetes it has many or all services of kubernetes which makes an API call according to the service type to get & send requests.  b. ETCD      : its a database which stores all data in the form of key value pair.it has all the informations stored related to the kubernetes cluster       c. Controller: it is the component in master node which always keeps an eye for all services.it runs in a loop and always keeps track of service like nodes, endpoints, replicas etc .if anything is not up to date as per the required desired state it sends those infor to api server which inturns talks to etcd and scheduler.  d. Schedular:  this component basically schedule all the required service as per the desired state .Apiserver when recieve anything from controller then it sends requests to schedular to schedule the jobs to the worker nodes. WORKER NODES:   a. Kubelet:    its is the agent running on worker nodes to register them with the cluster.it serves the requests coming from scheduler via apiserver  b. container runtime: any contanerised tool like docker to run containers    c. kube-proxy :  to estabilish a networking within kubernetes cluster What is POD?– Pod is a tiny atomic object running on master/worker nodes to have running container  – it is instantiated when scheduler schedules anything – each pod will get a unique IP and containers inside a pod may have different IP’s but in truth will have same IP of that pod- all containers inside a POD shares the same IP – all containers within a pod can communicate via localhost How certifcations based auth works ??  Write a diff between Create vs Apply and Put Vs Post and define IDEOMPOTENCY? Kubernetes create will allow us to create objects in kubernetes and will throw error if the object is already present. Kubernetes apply allow us to create a object if not present and update the existing objects without any error as in case of ‘create’. What is diff between kubectl exec and kubectl attach ?  kubectl exec will allow us to run any process or execute any

What is Kubernetes?— Launched by Google— Part of CNCF— Written in golang— Kubernetes is a container orchestrator, and helps to manage containerized applications— Helps in workload placement on different nodes— Does infrastructure abstraction— Maintains desired state. Why Kubernetes?— speed of deployment— ability of absorb changes— ability to recover quickly— We can deploy a scalable solution using kubernetes— hide complexity in the cluster How Kubernetes works?Components of Kubernetes: kube-apiserver — front-end to the control plane.— expose the Rest API— uses JSON

What is Kubernetes? Container-orchestration engine Why Kubernetes? Manage multi-node containers Manage microservices How Kubernetes works? Control plane api-server (Collection of k8s APIs) kube-controller-manager node-controller few other controllers as well scheduler (Allocate container to nodes) etcd (KV pair) (Brain of cluster) Worker Nodes kubelet (Manages node) kube-proxy (Runs on each worker node. Enables n/w communication b/w nodes) docker/rkt (Container runtime) Others DNS What is pod? Atomic unit of k8s Contain one or more containers Lives as long as there is at

What is Kubernetes?Kubernetes is an open-source orchestration tool for deployment, scaling, and management of containers.Developed by Google in Go languageScaling & Load BalancingResource monitoringChecks the health of nodes and containersNetworking, pods can communicate with others using ip addresss Why Kubernetes?open-sourceScalabilityHigh avaliablity How Kubernetes works? A Kubernetes cluster is a set of Nodes and a MasterMaster controls all the nodes.apiSever{} All incoming and outgoing communication with the cluster is done through API server using JSON filesCluster Store It maintains all information

What is Kubernetes? Kubernetes is a container Orchestration engine. Kunernetes is a google’s product originally. Kubernets comes in Managed and cloud instances. we should change the mindset while working on Kubernetes as Pets vs Kettle. So not to try and fix it in prod but replace first approach. Kubernetes was donated to CNFC in 2014. Kubernetes is originated from Borg and Lambda, google platform is created by it. Kubernetes is adopted by many large organizations for their products. Kubernetes is

What is Kubernetes? 15 PointsWhy Kubernetes? 10 PointsHow Kubernetes works? All components and roles of their componentsWhat is POD? – 15 Points

Assignment#1 Q1. Title – List of 20 popular commands of docker Ans : docker version docker info docker help docker images docker ps docker ps -a docker create –name name1 httpd docker start abc docker stop abc docker restart abc docker pause abc docker unpause abc docker kill abc docker rm abc docker run -d httpd docker pull httpd docker exec docker login docker image ls docker exec -it [id] docker exec [id] touch /opt/abc.txt docker attach [id] docker inspect

List of 20 popular commands of docker attach : Attach local standard input, output, and error streams to a running containercp : Copy files/folders between a container and the local filesystemcreate : Create a new containerdiff : Inspect changes to files or directories on a container’s filesystemexec : Run a command in a running containerinspect : Return low-level information on Docker objectskill : Kill one or more running containerspause: Pause all processes within one or more containersport: List port mappings

Q1. Title – List of 20 popular commands of docker Docker which Docker start Docker run Docker attach Docker kill Docker pause Docker unpause Docker create Docker ps Docker which image Docker ps -a Docker info Docker load Docker logs Docker image ls Docker help Docker wait Docker rm Docker update Docker port Q2. Title – How to configure SMTP server in Sonarqube? Log in to SonarQube Dashboard Go to MyAccounts ––> Notifications Select project for which email notifications are

20 most popular Commands for Docker docker -version : gives the currently installed docker version.docker run : creates a container from an image.docker ps : lists down all the containers which are running.docker ps -a : lists all the running and the exited containers.docker stop : Stops a running containerdocker kill : kills a running container immediately, if its taking too much time to stop, one can kill it.docker commit : creates a new image of edited container on local