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The process of creating Pod in Kubernetes

2025-01-17 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >

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This article mainly introduces the "Pod creation process in Kubernetes". In daily operation, I believe many people have doubts about the creation process of Pod in Kubernetes. I have consulted all kinds of materials and sorted out simple and easy operation methods. I hope to help you answer the doubts of "Pod creation process in Kubernetes"! Next, please follow the small series to learn together!

To deploy Pods inside Kubernetes, the first few steps may be familiar to you.

kubectl sends YAML to APIPod stored in etcd Scheduler assigns a node (Pod manifest file is stored in etcd at this time, there is no pod in the node)kubelet starts creating Podkubelet Delegates the creation of container to CRIkubelet Delegates the network connecting container to CNI CNI assigns an IP address Check probe kubelet reports IP address to control plane

At this point, the pod is complete, and Kubernetes stops there unless the Pod is part of the service. If the Pod belongs to a service, Kubernetes creates an endpoint-it connects the IP address and targetPort of the Pod. Add endpoint to endpoint (object).

image-20201115095936495

These endpoints will be used for the following:

kube-proxy Set iptables rules

CoreDNS updates DNS entries

ingress controller sets downstream service downstreams

Service meshes

More operators Other operators

In this way, the creation and release of a Pod is completed, and the process is the same for deleting pods, but the opposite is true.

At this point, the study of "Pod creation process in Kubernetes" is over, hoping to solve everyone's doubts. Theory and practice can better match to help you learn, go and try it! If you want to continue learning more relevant knowledge, please continue to pay attention to the website, Xiaobian will continue to strive to bring more practical articles for everyone!

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