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ReplicationControllers.md

ReplicationControllers

A ReplicationController is a Kubernetes resource that ensures its pods are always kept running. If the pod disappears for any reason, such as in the event of a node disappearing from the cluster or because the pod was evicted from the node, the ReplicationController notices the missing pod and creates a replacement pod.

When a node fails, only pods backed by a ReplicationController are recreated.

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A ReplicationController’s reconciliation loop

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A ReplicationController has three essential parts:

  • A label selector, which determines what pods are in the ReplicationController’s scope
  • A replica count, which specifies the desired number of pods that should be running
  • A pod template, which is used when creating new pod replicas
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rabellamy commented Oct 12, 2018 •
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