Modify voltha helm doc for kafka change

Change-Id: Ide3874b6588af8256e6fa85bbe7d4a0c53195cbc
diff --git a/charts/voltha.md b/charts/voltha.md
index 1402dda..5b0d551 100644
--- a/charts/voltha.md
+++ b/charts/voltha.md
@@ -8,42 +8,34 @@
 helm repo add incubator https://kubernetes-charts-incubator.storage.googleapis.com/
 ```
 
-Build dependencies
-
+Build dependencies and step out of the voltha directory
 ```shell
-helm dep build voltha
+helm dep build
+cd ..
 ```
 
-There's an etcd-operator **known bug** we're trying to solve that
-prevents users to deploy Voltha straight since the first time. We
-found a workaround.
+Prerequisite:
 
-Few steps:
-
-Install Voltha (without etcd operator)
+We need Kafka/Zookeeper for the Voltha components to work so if you have not installed it already, install it with the following command.
 
 ```shell
-helm install -n voltha --set etcd-operator.customResources.createEtcdClusterCRD=false voltha
+#Install kafka and zookeeper with one replica each
+helm install --name voltha-kafka --set replicas=1 \
+--set zookeeper.servers=1 \
+--set persistence.enabled=false \
+--set zookeeper.persistence.enabled=false incubator/kafka
 ```
-
-Uninstall Voltha
-
-```shell
-helm delete --purge voltha
-```
-
-Deploy Voltha
-
-```shell
-helm install -n voltha voltha
-```
+Note: We are assigning the name **voltha-kafka** to the helm kafka helm release. The Voltha helm chart assumes that this is the name of the kafka service. If you installed kafka independently with another name, you need to modify the **kafkaReleaseName** variable in the voltha helm chart for Voltha to work with your installation of kafka.
 
 ## Standard Installation Process
 
+Run the following command from the `helm-charts` directory
 ```shell
 helm install -n voltha voltha
 ```
 
+Note: This will install voltha components as well as etcd.
+
 ## Nodeports Exposed
 
 * Voltha CLI
@@ -53,11 +45,11 @@
     * Inner port: 8882
     * Nodeport: 30125
 
-## How to access the VOLTHA CLI
 
-Assuming you have not changed the default ports in the chart,
-you can use this command to access the VOLTHA CLI:
+## Standard Uninstallation Process
 
 ```shell
-ssh voltha@<pod-ip> -p 30110
+helm delete --purge voltha
 ```
+
+Note: This will uninstall the etcd store as well so your device state is lost.