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What is Kubernetes?
Open source Container-orchestration engine from Google

Why Kubernetes?

way to manage microservices
way to manage multi-node containers

How Kubernetes works?

Control plane
api-server (Collection of k8s APIs)
kube-controller-manager
node-controller
few other controllers as well
scheduler (Allocated 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?

Lowest (Atomic) unit of k8s
Can contain one or more containers
Lives as long as there is at least one container running