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Mathias Lykkegaard Lorenzen
Asked: 2020-08-10 22:39:09 +0800 CST

How do I set up persistent volume redundancy in Kubernetes?

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Let's say I have a Kubernetes cluster with 2 nodes. A control plane, and a worker.

If I use persistent volumes in my pods, will Kubernetes store my data in both nodes, for redundancy? And is redundancy even default?

kubernetes

1 Answers

  1. Best Answer

    Handling redundancy of storage is not something that's done by Kubernetes. Instead, it highly depends on the specific storage interface that you are using.

    More precisely:

    • Local storage (and HostPath): These are created on specific worker nodes, i.e. the one you have in your cluster. It's really not much more than a directory on that node.
    • CSI: This allows to use a storage system that handles redundancies and the like, i.e. by some clustered storage system. The official list of available CSI drivers provides a good starting point to identify one that suits your needs.
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