How Does Kubernetes Actually Create a Pod? Step‑by‑Step Walkthrough
This article walks through every stage of how Kubernetes creates a pod—from submitting the YAML to the API, through etcd storage, scheduling, kubelet and CRI actions, CNI networking, and endpoint setup for services—providing a clear, step‑by‑step visual guide.
Deploying a Pod in Kubernetes involves several distinct phases.
kubectl sends the YAML manifest to the API server.
The Pod definition is stored in etcd.
The scheduler assigns the Pod to a node (the Pod manifest remains in etcd; the node does not yet have the Pod).
kubelet begins creating the Pod.
kubelet delegates container creation to the Container Runtime Interface (CRI).
kubelet connects the container to the CNI network.
CNI allocates an IP address for the Pod.
Readiness/liveness probes run; kubelet reports the Pod IP back to the control plane.
At this point the Pod is fully created. If the Pod is part of a Service, Kubernetes also creates an endpoint object that links the Pod’s IP address and targetPort.
These endpoints are used by: kube-proxy to set iptables rules. CoreDNS to update DNS entries. Ingress controllers to configure downstream services ( downstreams).
Service meshes.
Other operators.
Deleting a Pod follows the same steps in reverse order.
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