02-Monitor-Cluster-Components.md

Monitor Cluster Components

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In this section, we will take a look at monitoring kubernetes cluster

How do you monitor resource consumption in kubernetes? or more importantly, what would you like to monitor?

Heapster vs Metrics Server

• Heapster is now deprecated and a slimmed down version was formed known as the metrics server.

  

Metrics Server

How are the metrics generated for the PODs on these nodes?

Metrics Server - Getting Started

• Clone the metric server from github repo

  $ git clone https://github.com/kubernetes-incubator/metrics-server.git
  

• Deploy the metric server

  $ kubectl create -f metric-server/deploy/1.8+/
  

• View the cluster performance

  $ kubectl top node
  

• View performance metrics of pod

  $ kubectl top pod