kubectlでPodを作成のプロセス

kubectlでPodを作成する際に、Kubernetesの中で何か起こっているかをわかりやすく説明見つけたので、メモしておく。

https://medium.com/jorgeacetozi/kubernetes-master-components-etcd-api-server-controller-manager-and-scheduler-3a0179fc8186

• kubectl writes to the API Server.
• API Server validates the request and persists it to etcd.
• etcd notifies back the API Server.
• API Server invokes the Scheduler.
• Scheduler decides where to run the pod on and return that to the API Server.
• API Server persists it to etcd.
• etcd notifies back the API Server.
• API Server invokes the Kubelet in the corresponding node.
• Kubelet talks to the Docker daemon using the API over the Docker socket to create the container.
• Kubelet updates the pod status to the API Server.
• API Server persists the new state in etcd.