Kubernetes Concepts: Difference between revisions
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Revision as of 21:42, 29 April 2017
External
Internal
Overview
Pod
One or more containers deployed together on one host, containing collocated applications that are relatively tightly coupled and run with a shared context. The containers in a pod share resources as IP addresses and volumes. The pod is the smallest unit that can be defined, deployed and managed. Kubernetes orchestrates pods.
Complex applications can be made of any pods.
Volume
etcd
A distributed key/value datastore for state within the environment.
Scheduler
The scheduler is a component that runs on master and determines the best fit for running pods across the environment. The scheduler also spreads pod replicas across nodes, for application HA.