Shulou(Shulou.com)06/03 Report--

Master

Master is the brain of Cluster, and its main responsibility is to schedule, that is, to decide where to run applications, to achieve high availability, and to run multiple Master.

Related components running:

Kubernetes APIServer (kube-apiserver), the unified entrance to the cluster and the coordinator of each component, provides interface services through RESTful API. All object resource additions, deletions, modifications, and monitoring operations are handed over to APIServer and then submitted to Etcd for storage.

Kubernetes ControllerManager, which handles regular background tasks in the cluster, corresponds to a controller for each resource, and ControllerManager is responsible for managing these controllers.

Kubernetes Scheduler, select a Node node for the newly created Pod according to the scheduling algorithm, which can be deployed arbitrarily, on the same node or on different nodes.

Etcd Server, distributed key storage system. Used to save cluster state data, such as Pod, Service and other object information

Node

The responsibility of Node is to run container applications. Node is managed by Master, and Node is responsible for monitoring and reporting the status of the container, and managing the life cycle of the container according to the requirements of Master. The relevant components that run are as follows:

Kubelet: the Agent of Master on the Node node, which manages the lifecycle of native running containers, such as creating containers, mounting data volumes on Pod, downloading secret, getting container and node status, and so on. Kubelet converts each Pod into a set of containers.

Kube-proxy: implement Pod network proxy on Node nodes, maintain network rules and layer 4 load balancing.

Docker Engine (docker): the Docker engine, which is responsible for native container creation and management.

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