Automate initialize (#138)

- no need to do "--set initialize=true" anymore

README.md

@@ -94,11 +94,8 @@ helm repo add apache https://pulsar.apache.org/charts
 
 To use the helm chart:
 
-> NOTE: Please specify `--set initialize=true` when installing a release at the first time. `initialize=true` will start initialize jobs
->       to initialize the cluster metadata for both bookkeeper and pulsar clusters.
-
 ```bash
-helm install --set initialize=true <release-name> apache/pulsar
+helm install <release-name> apache/pulsar
 ```
 
 ## Kubernetes cluster preparation
@@ -133,13 +130,10 @@ We provide some instructions to guide you through the preparation: http://pulsar
 
 3. Use the Pulsar Helm charts to install Apache Pulsar. 
 
-> NOTE: Please specify `--set initialize=true` when installing a release at the first time. `initialize=true` will start initialize jobs
->       to initialize the cluster metadata for both bookkeeper and pulsar clusters.
-
     This command installs and starts Apache Pulsar.
 
     ```bash 
-    $ helm install --set initialize=true <pulsar-release-name> apache/pulsar
+    $ helm install <pulsar-release-name> apache/pulsar
     ```
 
 5. Access the Pulsar cluster

charts/pulsar/templates/bookkeeper-cluster-initialize.yaml

@@ -16,7 +16,7 @@
 # specific language governing permissions and limitations
 # under the License.
 #
-{{- if .Values.initialize }}
+{{- if or .Release.IsInstall .Values.initialize }}
 {{- if .Values.components.bookkeeper }}
 apiVersion: batch/v1
 kind: Job

charts/pulsar/templates/pulsar-cluster-initialize.yaml

@@ -17,7 +17,7 @@
 # under the License.
 #
 
-{{- if .Values.initialize }}
+{{- if or .Release.IsInstall .Values.initialize }}
 {{- if .Values.components.broker }}
 apiVersion: batch/v1
 kind: Job