Add README with steps to run and optional vars

Signed-off-by: harshvkarn <harshvkarn54@gmail.com>

k8s/gcp/k8s-installer/README.md

@@ -0,0 +1,52 @@
+# GCP platform specific code and scripts
+## Google Cloud provisioning and setting up Kubernetes cluster using KOPS
+These playbook act as a wrapper class for all the `kops`, `gsutil` & `gcloud` command. 
+
+### Prerequisites
+- kubectl
+- gcloud
+- kops
+
+### Setting up
+
+- Run `glcloud init`, and authenticate into your google account linked with the Google Cloud
+
+---
+
+### Running
+
+- Run `create-vpc.yml` using anisble-playbook, that will create a Virtual Private Cloud
+```bash
+ansible-playbook create-vpc.yml --extra-vars "project=<project-name> vpc_name=<vpc-name>"
+```
+
+- Run `create-k8s-cluster`, this will create a Bucket and the cluster
+
+```bash
+ansible-playbook create-k8s-cluster.yml -vv --extra-vars "project=<project-name> nodes=1 vpc_name=<vpc-name>"
+```
+**Optional --extra-vars**
+
+> k8s_version=1.11.1
+> cluster_name=my-Cluster
+
+---
+
+### Deleting the cluster
+
+- Run `delete-k8s-cluster`, this will delete the cluster as well as the Bucket associated
+
+```bash
+ansible-playbook delete-k8s-cluster.yml
+```
+**Optional --extra-vars**
+
+> cluster_name=my-Cluster
+
+It will delete the cluster specified else it will delete the last created cluster
+
+- Run `delete-vpc` to delete the existing VPC (if required)
+```bash
+ansible-playbook delete-vpc.yml --extra-vars "project=<project-name> vpc_name=<vpc-name>"
+```
+