json_schema: {
      "properties": {
          "bookkeeper": {
              "description": "bookkeeper specific configuration properties",
              "properties": {
                  "cpus": {
                      "default": 1,
                      "description": "CPU shares to allocate to each bookkeeper instance.",
                      "minimum": 1,
                      "type": "number"
                  },
                  "instances": {
                      "default": 1,
                      "description": "Number of bookkeeper instances to run.",
                      "minimum": 1,
                      "type": "integer"
                  },
                  "mem": {
                      "default": 1024.0,
                      "description": "Memory (MB) to allocate to each bookkeeper task.",
                      "minimum": 512.0,
                      "type": "number"
                  },
                  "name": {
                      "default": "bookkeeper",
                      "description": "The name of this DC/OS service.",
                      "type": "string"
                  },
                  "service_port": {
                      "default": 3181,
                      "description": "bookkeeper export service port, using PORT0 in marathon",
                      "type": "integer"
                  },
                  "volume_size": {
                      "default": 70,
                      "description": "persistent Volme size(MB).",
                      "minimum": 10,
                      "type": "number"
                  },
                  "zk_client": {
                      "default": "master.mesos:2181",
                      "description": "env -- zookeeper client instance",
                      "type": "string"
                  }
              },
              "required": [
                  "cpus",
                  "mem",
                  "instances"
              ],
              "type": "object"
          }
      },
      "type": "object"
  }