Updates to proper namings

 CASSANDRA_DATA_DIR=/home/docker/cassandra_volume
 
 # cassandra schema container environment variables
-SKIP_SCHEMA_CREATION=false
-SKIP_SYSTEM_DATA=true
-SKIP_DEMO_DATA=true
+CREATE_SCHEMA=true
+ADD_SYSTEM_DATA=false
+ADD_DEMO_DATA=false
 CASSANDRA_URL=cassandra
\ No newline at end of file

@@ -29,9 +29,9 @@ services:
   tb-cassandra-schema:
     image: "thingsboard/tb-cassandra-schema:1.2.4"
     environment:
-      - SKIP_SCHEMA_CREATION=${SKIP_SCHEMA_CREATION}
-      - SKIP_SYSTEM_DATA=${SKIP_SYSTEM_DATA}
-      - SKIP_DEMO_DATA=${SKIP_DEMO_DATA}
+      - CREATE_SCHEMA=${CREATE_SCHEMA}
+      - ADD_SYSTEM_DATA=${ADD_SYSTEM_DATA}
+      - ADD_DEMO_DATA=${ADD_DEMO_DATA}
       - CASSANDRA_URL=${CASSANDRA_URL}
     entrypoint: ./install-schema.sh
   cassandra:

@@ -22,7 +22,7 @@ do
   sleep 10
 done
 
-if [ "$SKIP_SCHEMA_CREATION" == "false" ]; then
+if [ "$CREATE_SCHEMA" == "true" ]; then
     echo "Creating 'Thingsboard' keyspace..."
     cqlsh $CASSANDRA_URL -f /root/schema.cql
     if [ "$?" -eq 0 ]; then
@@ -32,7 +32,7 @@ if [ "$SKIP_SCHEMA_CREATION" == "false" ]; then
     fi
 fi
 
-if [ "$SKIP_SYSTEM_DATA" == "false" ]; then
+if [ "$ADD_SYSTEM_DATA" == "true" ]; then
     echo "Adding system data..."
     cqlsh $CASSANDRA_URL -f /root/system-data.cql
     if [ "$?" -eq 0 ]; then
@@ -42,7 +42,7 @@ if [ "$SKIP_SYSTEM_DATA" == "false" ]; then
     fi
 fi
 
-if [ "$SKIP_DEMO_DATA" == "false" ]; then
+if [ "$ADD_DEMO_DATA" == "true" ]; then
     echo "Adding demo data..."
     cqlsh $CASSANDRA_URL -f /root/demo-data.cql
     if [ "$?" -eq 0 ]; then

@@ -24,11 +24,11 @@ spec:
     imagePullPolicy: Always
     image: thingsboard/tb-cassandra-schema:1.2.4
     env:
-    - name: SKIP_SCHEMA_CREATION
+    - name: CREATE_SCHEMA
       value: "false"
-    - name: SKIP_SYSTEM_DATA
+    - name: ADD_SYSTEM_DATA
       value: "false"
-    - name : SKIP_DEMO_DATA
+    - name : ADD_DEMO_DATA
       value: "false"
     - name : CASSANDRA_URL
       value: "cassandra-headless"

@@ -35,7 +35,7 @@ kind: ConfigMap
 metadata:
   name: zk-config
 data:
-  ensemble: "zk-0;zk-1"
+  ensemble: "zk-0;zk-1;zk-2"
   replicas: "3"
   jvm.heap: "500m"
   tick: "2000"
@@ -56,7 +56,7 @@ spec:
   selector:
     matchLabels:
       app: zk
-  minAvailable: 2
+  minAvailable: 3
 ---
 apiVersion: apps/v1beta1
 kind: StatefulSet
@@ -64,7 +64,7 @@ metadata:
   name: zk
 spec:
   serviceName: zk-headless
-  replicas: 2
+  replicas: 3
   template:
     metadata:
       labels: