Documentation for persistent local volume chart

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+# Local Persistent Volume Helm chart
+
+## Introduction
+
+The `local-persistent-volume` helm chart is a utility helm chart. It was
+created mainly to persist the `xos-core` DB data but this helm can be used
+to persist any data.
+
+It uses a relatively new kubernetes feature (it's a beta feature
+in Kubernetes 1.10.x) that allows us to define an independent persistent
+store in a kubernetes cluster.
+
+The helm chart mainly consists of the following kubernetes resources:
+
+- A storage class resource representing a local persistent volume
+- A persistent volume resource associated with the storage class and a specific directory on a specific node
+- A persistent volume claim resource that claims certain portion of the persistent volume on behalf of a pod
+
+The following variables are configurable in the helm chart:
+
+- `storageClassName`: The name of the storage class resource
+- `persistentVolumeName`: The name of the persistent volume resource
+- `pvClaimName`: The name of the persistent volume claim resource
+- `volumeHostName`: The name of the kubernetes node on which the data will be persisted
+- `hostLocalPath`: The directory or volume mount path on the chosen chosen node where data will be persisted
+- `pvStorageCapacity`: The capacity of the volume available to the persistent volume resource (e.g. 10Gi)
+
+Note: For this helm chart to work, the volume mount path or directory specified in the `hostLocalPath` variable needs to exist before the helm chart is deployed.
+
+## Standard Install
+
+```shell
+helm install -n local-store local-persistent-volume
+```
+
+## Standard Uninstall
+
+```shell
+helm delete --purge local-store
+```