hostPath allows us to mount a file or a directory from a host to Pods and, through them, to containers. Before we discuss the usefulness of this type, we’ll have a short discussion about use-cases when this is not a good choice.

Do not use hostPath to store a state of an application. Since it mounts a file or a directory from a host into a Pod, it is not fault-tolerant. If the server fails, Kubernetes will schedule the Pod to a healthy node, and the state will be lost.

For our use case, hostPath works just fine. We’re not using it to preserve state, but to gain access to Docker server running on the same host as the Pod.

Line 15-18: The hostPath type has only two fields. The path represents the file or a directory we want to mount from the host. Since we want to mount a socket, we set the type accordingly. There are other types we could use.