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kubespray/docs/gcp-pd-csi.md

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+# GCP Persistent Disk CSI Driver
+
+The GCP Persistent Disk CSI driver allows you to provision volumes for pods with a Kubernetes deployment over Google Cloud Platform. The CSI driver replaces to volume provioning done by the in-tree azure cloud provider which is deprecated.
+
+To deploy GCP Persistent Disk CSI driver, uncomment the `gcp_pd_csi_enabled` option in `group_vars/all/gcp.yml` and set it to `true`.
+
+## GCP Persistent Disk Storage Class
+
+If you want to deploy the GCP Persistent Disk storage class to provision volumes dynamically, you should set `persistent_volumes_enabled` in `group_vars/k8s_cluster/k8s_cluster.yml` to `true`.
+
+## GCP credentials
+
+In order for the CSI driver to provision disks, you need to create for it a service account on GCP with the appropriate permissions.
+
+Follow these steps to configure it:
+
+```ShellSession
+# This will open a web page for you to authenticate
+gcloud auth login
+export PROJECT=nameofmyproject
+gcloud config set project $PROJECT
+
+git clone https://github.com/kubernetes-sigs/gcp-compute-persistent-disk-csi-driver $GOPATH/src/sigs.k8s.io/gcp-compute-persistent-disk-csi-driver
+
+export GCE_PD_SA_NAME=my-gce-pd-csi-sa
+export GCE_PD_SA_DIR=/my/safe/credentials/directory
+
+./deploy/setup-project.sh
+```
+
+The above will create a file named `cloud-sa.json` in the specified `GCE_PD_SA_DIR`. This file contains the service account with the appropriate credentials for the CSI driver to perform actions on GCP to request disks for pods.
+
+You need to provide this file's path through the variable `gcp_pd_csi_sa_cred_file` in `inventory/mycluster/group_vars/all/gcp.yml`
+
+You can now deploy Kubernetes with Kubespray over GCP.
+
+## GCP PD CSI Driver test
+
+To test the dynamic provisioning using GCP PD CSI driver, make sure to have the storage class deployed (through persistent volumes), and apply the following manifest:
+
+```yml
+---
+kind: PersistentVolumeClaim
+apiVersion: v1
+metadata:
+  name: podpvc
+spec:
+  accessModes:
+    - ReadWriteOnce
+  storageClassName: csi-gce-pd
+  resources:
+    requests:
+      storage: 1Gi
+
+---
+apiVersion: v1
+kind: Pod
+metadata:
+  name: web-server
+spec:
+  containers:
+   - name: web-server
+     image: nginx
+     volumeMounts:
+       - mountPath: /var/lib/www/html
+         name: mypvc
+  volumes:
+   - name: mypvc
+     persistentVolumeClaim:
+       claimName: podpvc
+       readOnly: false
+```
+
+## GCP PD documentation
+
+You can find the official GCP Persistent Disk CSI driver installation documentation here: [GCP PD CSI Driver](https://github.com/kubernetes-sigs/gcp-compute-persistent-disk-csi-driver/blob/master/docs/kubernetes/user-guides/driver-install.md
+)