若要提高彈性，您可以在 Cloud Assembly 中向雲端範本代碼新增運算式。

運算式的運作方式

Cloud Assembly 運算式使用 ${expression} 建構，如下列範例所示。

備註： Cloud Assembly 運算式與規則運算式不同。請參閱 Cloud Assembly 的 運算式語法。

以下代碼範例已經過剪除，僅顯示重要行。整個未編輯的雲端範本會出現在結尾處。

範例

在部署時，允許使用者在遠端存取所需的加密金鑰中貼上： 

inputs:
  sshKey:
    type: string
    maxLength: 500
resources:
  frontend:
    type: Cloud.Machine
    properties:
      remoteAccess:
        authentication: publicPrivateKey
        sshKey: '${input.sshKey}'

若要部署到 VMware Cloud on AWS，請將資料夾名稱設定為工作負載所需名稱： 

inputs:
  environment:
    type: string
    enum:
      - AWS
      - vSphere
      - Azure
      - VMC
      - GCP
    default: vSphere
resources:
  frontend:
    type: Cloud.Machine
    properties:
      folderName: '${input.environment == "VMC" ? "Workload" : ""}'

在部署時，請使用符合所選環境的全小寫 env 標籤標記機器： 

inputs:
  environment:
    type: string
    enum:
      - AWS
      - vSphere
      - Azure
      - VMC
      - GCP
    default: vSphere
resources:
  frontend:
    type: Cloud.Machine
    properties:
      constraints:
        - tag: '${"env:" + to_lower(input.environment)}'

將前端叢集中的機器數目設定為 1 (小型) 或 2 (大型)。請注意，大型叢集是透過清除程序設定的： 

inputs:
  envsize:
    type: string
    enum:
      - Small
      - Large
resources:
  frontend:
    type: Cloud.Machine
    properties:
      count: '${input.envsize == "Small" ? 1 : 2}'

透過繫結到網路資源中找到的內容，將機器連結至相同的預設網路： 

resources:
  frontend:
    type: Cloud.Machine
    properties:
      networks:
        - network: '${resource.Cloud_Network_1.name}'
  apitier:
    type: Cloud.Machine
    properties:
      networks:
        - network: '${resource.Cloud_Network_1.name}'
  Cloud_Network_1:
    type: Cloud.Network
    properties:
      name: Default
      networkType: existing

加密提交至 API 的存取認證： 

resources:
  apitier:
    type: Cloud.Machine
    properties:
      cloudConfig: |
        #cloud-config
        runcmd:
          - export apikey=${base64_encode(input.username:input.password)}
          - curl -i -H 'Accept:application/json' -H 'Authorization:Basic :$apikey' http://example.com

探索 API 機器的位址： 

resources:
  frontend:
    type: Cloud.Machine
    properties:
      cloudConfig: |
        runcmd:
          - echo ${resource.apitier.networks[0].address}
  apitier:
    type: Cloud.Machine
    properties:
      networks:
        - network: '${resource.Cloud_Network_1.name}'

完成雲端範本

inputs:
  environment:
    type: string
    enum:
      - AWS
      - vSphere
      - Azure
      - VMC
      - GCP
    default: vSphere
  sshKey:
    type: string
    maxLength: 500
  envsize:
    type: string
    enum:
      - Small
      - Large
resources:
  frontend:
    type: Cloud.Machine
    properties:
      folderName: '${input.environment == "VMC" ? "Workload" : ""}'
      image: ubuntu
      flavor: medium
      count: '${input.envsize == "Small" ? 1 : 2}'
      remoteAccess:
        authentication: publicPrivateKey
        sshKey: '${input.sshKey}'
      cloudConfig: |
        packages:
          - nginx
        runcmd:
          - echo ${resource.apitier.networks[0].address}
      constraints:
        - tag: '${"env:" + to_lower(input.environment)}'
      networks:
        - network: '${resource.Cloud_Network_1.name}'
  apitier:
    type: Cloud.Machine
    properties:
      folderName: '${input.environment == "VMC" ? "Workload" : ""}'
      image: ubuntu
      flavor: small
      cloudConfig: |
        #cloud-config
        runcmd:
          - export apikey=${base64_encode(input.username:input.password)}
          - curl -i -H 'Accept:application/json' -H 'Authorization:Basic :$apikey' http://example.com
      remoteAccess:
        authentication: publicPrivateKey
        sshKey: '${input.sshKey}'
      constraints:
        - tag: '${"env:" + to_lower(input.environment)}'
      networks:
        - network: '${resource.Cloud_Network_1.name}'
  Cloud_Network_1:
    type: Cloud.Network
    properties:
      name: Default
      networkType: existing
      constraints:
        - tag: '${"env:" + to_lower(input.environment)}'

標記