Beginning Kubernetes on the Google Cloud Platform: A Guide to Automating Application Deployment, Scaling, and Management

© Ernesto Garbarino 2019

E. GarbarinoBeginning Kubernetes on the Google Cloud Platformhttps://doi.org/10.1007/978-1-4842-5491-2_8

8. DaemonSets

Ernesto Garbarino¹ 

(1)

EGHAM, UK

 

The DaemonSet controller ensures that every Node runs a single instance of a Pod. This is useful for uniform, horizontal services that need to be deployed at the Node level, such as log collectors, caching agents, proxies, or any other kind of system-level capability. But why would, a distributed system such as Kubernetes, promote “tight coupling” between Pods and “boxes” as a feature? Because of performance advantages—and outright necessity sometimes. Pods deployed within the same Node can share the local network interface as well as the local file system; the benefit is ...