diff --git a/README.adoc b/README.adoc
index 423a3c5..a3286a7 100644
--- a/README.adoc
+++ b/README.adoc
@@ -112,7 +112,7 @@ Connection settings could be configured for all clusters at once or per dedicate
 [source,yaml]
 ----
 cmak:
-  commonClusters:
+  clustersCommon:
     curatorConfig:
       zkMaxRetry: 100 # <1>
   clusters:
@@ -122,6 +122,7 @@ cmak:
         zkConnect: "kafka01.stage:2181,kafka02.stage:2181"
     - name: "cluster-prod"
       kafkaVersion: "2.1.0" # <3>
+      enabled: false
       curatorConfig:
         zkConnect: "kafka01.prod:2181,kafka02.prod:2181,kafka03.prod:2181"
 ----
diff --git a/values-lint.yaml b/values-lint.yaml
index 81e895b..152aa46 100644
--- a/values-lint.yaml
+++ b/values-lint.yaml
@@ -1,13 +1,15 @@
 cmak:
-  commonClusters:
+  clustersCommon:
     curatorConfig:
       zkMaxRetry: 100
+
   clusters:
     - name: "cluster-stage"
       kafkaVersion: "2.5.0"
       curatorConfig:
         zkConnect: "kafka01.stage:2181,kafka02.stage:2181"
     - name: "cluster-prod"
+      enabled: false
       kafkaVersion: "2.1.0"
       curatorConfig:
         zkConnect: "kafka01.prod:2181,kafka02.prod:2181,kafka03.prod:2181"
diff --git a/values.schema.json b/values.schema.json
index e52c723..889b1bd 100644
--- a/values.schema.json
+++ b/values.schema.json
@@ -1,75 +1,102 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema",
   "$id": "https://github.com/eshepelyuk/cmak-operator/",
-  "type": "object",
   "title": "CMAK operator Helm values",
-  "required": [
-    "cmak",
-    "reconcile"
-  ],
+
+  "definitions": {
+    "curatorConfigCommon": {
+      "type": "object",
+      "properties": {
+        "zkMaxRetry": { "type": "integer", "default": 100 },
+        "baseSleepTimeMs": { "type": "integer", "default": 100 },
+        "maxSleepTimeMs": { "type": "integer", "default": 1000 }
+      }
+    },
+    "curatorConfig": {
+      "type": "object", "required": ["zkConnect"],
+      "allOf": [
+        { "$ref": "#/definitions/curatorConfigCommon" },
+        { "properties": {
+            "zkConnect": { "type": "string" }
+          }
+        }
+      ]
+    },
+    "clusterConfigShared": {
+      "type": "object",
+      "properties": {
+        "kafkaVersion": { "type": "string", "default": "2.2.0" }
+      }
+    },
+    "clusterConfigCommon": {
+      "type": "object", "required": ["curatorConfig"],
+      "allOf": [
+        { "$ref": "#/definitions/clusterConfigShared" },
+        { "properties": {
+            "curatorConfig": { "$ref": "#/definitions/curatorConfigCommon" }
+          }
+        }
+      ]
+    },
+    "clusterConfig": {
+      "type": "object", "required": ["name", "curatorConfig"],
+      "allOf": [
+        { "$ref": "#/definitions/clusterConfigShared" },
+        { "properties": {
+            "name": { "type": "string" },
+            "enabled": { "type": "boolean", "default": true },
+            "curatorConfig": { "$ref": "#/definitions/curatorConfig" }
+          }
+        }
+      ]
+    }
+  },
+
+  "type": "object", "additionalProperties": false,
+  "required": ["cmak", "reconcile"],
+
   "properties": {
     "reconcile": {
-      "type": "object",
-      "required": [
-        "schedule"
-      ],
+      "type": "object", "additionalProperties": false,
+      "required": ["schedule"],
       "properties": {
         "schedule": {
-          "type": "string",
-          "title": "cron expression for periodic reconciliation"
+          "type": "string", "title": "cron expression for periodic reconciliation"
         },
         "overwriteZk": {
-          "type": "boolean",
-          "title": "allow overwrite Zookeeper settings of CMAK",
-          "default": true
+          "type": "boolean", "default": true, "title": "allow overwrite Zookeeper settings of CMAK"
         },
         "successfulJobsHistoryLimit": {
-          "type": "integer",
-          "title": "how many completed jobs should be kept"
+          "type": ["null", "integer"], "default": null, "title": "how many completed jobs should be kept"
         },
         "failedJobsHistoryLimit": {
-          "type": "integer",
-          "title": "how many failed jobs should be kept"
+          "type": ["null", "integer"], "default": null, "title": "how many failed jobs should be kept"
         }
-
-      },
-      "additionalProperties": false
+      }
     },
     "cmak": {
-      "$id": "#/properties/cmak",
-      "type": "object",
-      "required": [
-        "basicAuth"
-      ],
+      "type": "object", "additionalProperties": false,
+      "required": ["basicAuth", "clustersCommon", "clusters"],
       "properties": {
         "basicAuth": {
-          "$id": "#/properties/cmak/properties/basicAuth",
-          "type": "object",
-          "required": [
-            "enabled"
-          ],
+          "type": "object", "additionalProperties": false, "required": ["enabled"],
           "properties": {
             "enabled": {
-              "type": "boolean",
-              "title": "enable Basic auth",
-              "default": false
+              "type": "boolean", "default": false, "title": "enable Basic auth"
             },
             "username": {
-              "type": "string",
-              "title": "username for Basic auth",
-              "default": ""
+              "type": "string", "default": "", "title": "username for Basic auth"
             },
             "password": {
-              "type": "string",
-              "title": "password for Basic auth",
-              "default": ""
+              "type": "string", "default": "", "title": "password for Basic auth"
             }
-          },
-          "additionalProperties": false
+          }
+        },
+        "clustersCommon": { "$ref": "#/definitions/clusterConfigCommon" },
+        "clusters": {
+          "type": "array", "items": { "$ref": "#/definitions/clusterConfig" }
         }
-      },
-      "additionalProperties": true
+      }
     }
-  },
-  "additionalProperties": true
+  }
 }
diff --git a/values.yaml b/values.yaml
index 2a45ec3..16ecc76 100644
--- a/values.yaml
+++ b/values.yaml
@@ -49,5 +49,5 @@ cmak:
 reconcile:
   schedule: "*/2 * * * *"
   overwriteZk: true
-  # successfulJobsHistoryLimit:
-  # failedJobsHistoryLimit:
+  successfulJobsHistoryLimit: null
+  failedJobsHistoryLimit: null