etcdIt stores the configuration information which can be used by each of the nodes in the cluster. API ServerKubernetes is an API server which provides all the operation on cluster using the API. Controller ManagerThis component is responsible for most of the collectors that regulates the state of cluster and performs a task. SchedulerThis is one of the key components of Kubernetes master. It is a service in master responsible for distributing the workload. Kubernetes – Node ComponentsFollowing are the

Automated rollouts and rollbacks Storage orchestration Automatic bin packing IPv4/IPv6 dual-stack Self-healing Service discovery and load balancing Secret and configuration management Batch execution Horizontal scaling Designed for extensibility

1) FROM : must be the first non-comment instruction in the Dockerfileeg : FROM ubuntu2) MAINTAINER :instruction allows you to set the Author field of the generated imageseg : MAINTAINER Mani K.M mani.km@quest-global.command3) RUN : The exec form makes it possible, to RUN commands using a base image that does not contain the specified shell executableeg: RUN apt-get update4) CMD: The main purpose of a CMD is to provide defaults for an executing containereg : CMD echo Hello world5) LABEL

docker stop command is for : Stop a running containerdocker kill command is for : Kill a running container

The docker update command dynamically updates container configuration & prevent containers from consuming too many resources from Docker host.

The docker unpause command is for : un-suspends all processes in the specified containers.The docker pause command is for : suspends all processes in the specified containers.

Docker containers are an abstraction at the app layer that packages code and dependencies together. Docker image image is a file used to execute code in a Docker container.