We’ve already said Kubernetes sits between applications and infrastructure and acts like the OS of the cloud. Figure 3.1 shows applications running on Kubernetes, which, in turn, runs on various infrastructure platforms.
Figure 3.1
The diagram shows four Kubernetes installations running on four different infrastructure platforms. However, all the application sees is four Kubernetes clusters, it can’t see the infrastructure below. This makes it easier to migrate applications from one Kubernetes installation to another.
We call a Kubernetes installation a Kubernetes cluster.
There are a couple of things worth clarifying ...
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