Resource Orchestration Service:Specify region-specific parameters for a stack group

When you create a stack group from a single template, you may need different parameter values for each region. For example, you might use a different image in each region. Define a Mappings section that associates keys, such as region IDs, with corresponding values, such as image IDs. Then, in the Resources or Outputs sections, call Fn::FindInMap to retrieve a value from the map. To look up the value for the current deployment region, pass the ALIYUN::Region pseudo parameter to Fn::FindInMap.

ROSTemplateFormatVersion: '2015-09-01'
Mappings:
  RegionMap:
    cn-shenzhen:
      ImageId: m-2vca5gczbrozn1vwp****
    cn-beijing:
      ImageId: m-hp38urk0l2aioidn****
    us-west-1:
      ImageId: m-rj9b5x7xtspmbage****
    cn-shanghai:
      ImageId: m-2ze1bpkyqvylc2ag****
    cn-hangzhou:
      ImageId: m-bp1h1cr4n27d3owq****
Outputs:
  ImageId:
    Value:
      Fn::FindInMap:
          - RegionMap
          - Ref: ALIYUN::Region
          - ImageId

Console example

If you create a stack group and select China (Hangzhou) as the deployment region, the template automatically uses the ImageId value that corresponds to cn-hangzhou in the RegionMap.

On the stack details page, click the Outputs tab to view the ImageId output and its value.