Kubernetes: Up and Running by Joe Beda & Brendan Burns & Kelsey Hightower

Author:Joe Beda & Brendan Burns & Kelsey Hightower [Beda, Joe & Burns, Brendan & Hightower, Kelsey]
Language: eng
Format: epub
Tags: Google/Android, Networking
Publisher: O'Reilly Media, Inc.
Published: 2017-09-19T17:00:00+00:00

NOTE

DaemonSets and ReplicaSets are a great demonstration of the value of Kubernetes’s decoupled architecture. It might seem that the right design would be for a ReplicaSet to own the Pods it manages, and for Pods to be subresources of a ReplicaSet. Likewise, the Pods managed by a DaemonSet would be subresources of that DaemonSet. However, this kind of encapsulation would require that tools for dealing with Pods be written two different times, one for DaemonSets and one for ReplicaSets. Instead, Kubernetes uses a decoupled approach where Pods are top-level objects. This means that every tool you have learned for introspecting Pods in the context of ReplicaSets (e.g., kubectl logs <pod-name>) is equally applicable to Pods created by DaemonSets.

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