helm: Stop helm chart from failing if zkHosts is not set (#13746)

helm/druid/Chart.yaml

@@ -30,7 +30,7 @@ dependencies:
     version: 8.6.4
     repository: https://charts.helm.sh/stable
     condition: postgresql.enabled
-version: 0.3.2
+version: 0.3.3
 home: https://druid.apache.org/
 icon: https://druid.apache.org/img/favicon.png
 sources:

helm/druid/templates/configmap.yaml

@@ -31,7 +31,7 @@ data:
 {{ toYaml .Values.configVars | indent 2 }}
 {{- if .Values.zookeeper.enabled }}
   druid_zk_service_host: {{ .Release.Name }}-zookeeper-headless:2181
-{{- else }}
+{{- else if .Values.zkHosts }}
   druid_zk_service_host: {{ .Values.zkHosts }}
 {{- end }}
 {{- if .Values.mysql.enabled }}

helm/druid/values.yaml

@@ -376,6 +376,7 @@ router:
 # Zookeeper:
 # ------------------------------------------------------------------------------
 
+# If using a zookeeper installed outside of this chart you must uncomment and set this line
 # zkHosts: druid-zookeeper-headless:2181
 
 zookeeper: