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Kubernetes for Serverless Applications by Russ McKendrick

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Cattle

Cattle are more representative of the instance types you should be running in public clouds such as Amazon Web Services (AWS) or Microsoft Azure, where you have auto scaling enabled.

  • You have so many cattle in your herd you don't name them; instead they are given numbers and tagged so you can track them. In your instance cluster, you can also have too many to name so, like cattle, you give them numbers and tag them. For example, an instance could be called ip123067099123.domain.com and tagged as app-server.
  • When a member of your herd gets sick, you shoot it, and if your herd requires it you replace it. In much the same way, if an instance in your cluster starts to have issues it is automatically terminated and replaced with a replica. ...

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