在userdata中使用cloudformation參數

Question

我有zookeeper連接爲ip1：port1，ip2：port2，ip3：port3，我想在我的userdata中使用這個我該怎麼做？

"ZooKeeperConnect": { 
     "Type": "String", 
     "Description": "list of IP or CNAME's for the associated zookeeper ensemble", 
     "AllowedPattern": "([1-9][0-9]?|[1-2][0-9]{2})(\\.([1-9][0-9]?|[1-2][0-9]{2})){3}(:[1-9][0-9]{1,4})?(,([1-9][0-9]?|[1-2][0-9]{2})(\\.([1-9][0-9]?|[1-2][0-9]{2})){3}(:[1-9][0-9]{1,4})?)*" 
     } 


"UserData": { 
     "Fn::Base64": { 
      "Fn::Join": [ 
      "", 
      [ 
       "#!/bin/bash \n", 
       "echo Cache proxy vars... \n", 

我想用我的用戶數據

Answer 1

ZooKeeperConnect值可以參考ZooKeeperConnect參數或任何其他參數在用戶數據部分：

"UserData" : { 
    "Fn::Base64" : { 
     "Fn::Join" : [ ",", [ 
      { "Ref" : "MyValue" }, 
      { "Ref" : "MyName" }, 
      "Hello World" ] ] 
    } 
} 

上面的代碼是從http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/quickref-general.html拍攝。