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Hyperconverged storage

We've talked about our converged nodes before, running the networking, control pane and workloads on the same nodes. Now let's take that one step further and have the nodes provide storage for the cluster as well. The previous section saw us install a Container Network Interface (CNI) and now we'll install a Container Storage Interface, or CSI.

There are a few options for this, OpenEBS, Ceph, and Longhorn are three of the most popular.

Ceph provides block storage, object storage, as well as filesystem based storage in a single interface, with a large support community provided by the Ceph Foundation.