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創建ECS實例組并掛載到CLB實例

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本文以創建ECS實例組并掛載到傳統型負載均衡（CLB）實例為例，由簡入難的向您介紹如何編輯ROS模板。

前提條件

請您提前了解模板語法和結構。更多信息，請參見模板快速入門。

場景示例

在阿里云專有網絡中創建ECS實例組，并在ECS實例組中部署Nginx服務，然后將創建的ECS實例組掛載到CLB實例上。

1

使用須知

您可以訪問對應的資源類型查看屬性詳情。具體操作，請參見查看資源類型。

資源類型為每個屬性定義了類型、是否必須、是否允許更新等信息。如果為必須，則要求必須在模板Resources的Properties中聲明該屬性；反之，則為非必須。如果為允許更新，則可以在新模板中修改該屬性，然后使用修改后的模板更新資源棧以達到更新云資源屬性的目的；反之，則不允許更新。

編輯模板

您可以通過資源類型索引文檔查找所需的資源類型。更多信息，請參見資源類型索引。

例如：當前場景中需要創建專有網絡（ALIYUN::ECS::VPC）、ECS實例組（ALIYUN::ECS::InstanceGroup）、負載均衡實例（ALIYUN::SLB::LoadBalancer）、負載均衡監聽（ALIYUN::SLB::Listener）、彈性公網IP（ALIYUN::VPC::EIP），交換機（ALIYUN::ECS::VSwitch）、安全組（ALIYUN::ECS::InstanceGroup）。在創建ECS實例組時，需要使用ALIYUN::ECS::InstanceGroup中的UserData參數執行數據初始化命令，并使用等待信號的資源（ALIYUN::ROS::WaitCondition）和接受信號的資源（ALIYUN::ROS::WaitConditionHandle）控制ECS實例組內部的執行流程。

根據以上信息，您可以在模板中定義需要創建的資源（Resources）。

定義模板資源及其依賴關系

定義基礎網絡資源

您可以通過模板定義基礎網絡資源Vpc、VSwitch、EcsSecurityGroup。

  • 使用Ref與偽參數ALIYUN::StackName獲取資源棧名稱作為資源屬性的屬性值。例如：Vpc中的VpcName和VSwitch中的VSwitchName。更多信息，請參見函數（Functions）和ALIYUN::StackName。

  • 使用Ref獲取返回指定參數的值。例如：VSwitch中的Ref: Vpc，獲取的是Vpc資源的返回值VpcId。一般返回指定參數的值都為資源ID。更多信息，請參見函數（Functions）。

Resources:
  Vpc:
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock: 192.168.0.0/16
      VpcName:
        Ref: ALIYUN::StackName
  VSwitch:
    Type: ALIYUN::ECS::VSwitch
    Properties:
      VSwitchName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: Vpc
      ZoneId:
        Ref: ZoneId
      CidrBlock: 192.168.0.0/24
  EcsSecurityGroup:
    Type: ALIYUN::ECS::SecurityGroup
    Properties:
      SecurityGroupName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: Vpc
      SecurityGroupIngress:
        - PortRange: 80/80
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          IpProtocol: tcp
          NicType: internet
      SecurityGroupEgress:
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.0.0/0
          NicType: internet
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.0.0/0
          NicType: intranet

定義負載均衡實例和彈性公網資源

您可以通過模板定義負載均衡實例Slb、負載均衡監聽SlbListener和彈性公網IP資源EipSlbAddress。

使用Fn::Sub與偽參數ALIYUN::StackName獲取資源棧名稱進行拼接成新的字符串作為資源屬性的屬性值。更多信息，請參見ALIYUN::StackName。

Resources:
  Slb:
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      VpcId:
        Ref: Vpc
      VSwitchId:
        Ref: VSwitch
      LoadBalancerName:
        Fn::Sub: slb-${ALIYUN::StackName}
      PayType:
        Ref: PayType
      PricingCycle:
        Ref: PayPeriodUnit
      Duration:
        Ref: PayPeriod
      AddressType: intranet
      LoadBalancerSpec:
        Ref: LoadBalancerSpec
      AutoPay: true
  SlbListener:
    DependsOn:
      - Slb
    Type: ALIYUN::SLB::Listener
    Properties:
      Persistence:
        CookieTimeout: 60
        StickySession: 'on'
        PersistenceTimeout: 180
        XForwardedFor: 'off'
        StickySessionType: insert
      ListenerPort: 80
      Bandwidth: -1
      HealthCheck:
        HttpCode: http_2xx,http_3xx,http_4xx,http_5xx
        HealthCheckType: tcp
        UnhealthyThreshold: 3
        Timeout: 5
        HealthyThreshold: 3
        Port: 80
        URI: /
        Interval: 2
      LoadBalancerId:
        Ref: Slb
      BackendServerPort: 80
      Protocol: tcp
  EipSlbAddress:
    Type: ALIYUN::VPC::EIP
    Properties:
      Name:
        Ref: ALIYUN::StackName
      InternetChargeType: PayByTraffic
      Bandwidth:
        Ref: Bandwidth

定義ECS實例組、等待信號資源和接收信號資源

您可以通過模板定義ECS實例組EcsInstanceGroup、等待信號資源WaitCondition和接收信號資源WaitConditionHandle。

  • 使用Fn::GetAtt函數獲取返回模板中資源的屬性值。例如：WaitConditionHandle的返回值CurlCli。更多信息，請參見函數（Functions）。

  • 使用Fn::Sub函數用于拼接命令操作字符串及將輸入字符串中的變量替換為您指定的值。例如：EcsInstanceGroup中的UserData，使用CurlCli替換${CurlCli}。更多信息，請參見函數（Functions）。

  • 控制ECS實例內部初始化的資源組合如下。

    1. 創建一個等待信號資源（ALIYUN::ROS::WaitCondition）。

    2. 創建一個接收信號資源（ALIYUN::ROS::WaitConditionHandle）。

    3. 在ECS內部UserData中執行腳本并發送信息。例如：EcsInstanceGroup中的UserData內容，UserData中可以傳入ECS的初始化腳本，最后執行成功回調WaitConditionHandle資源并結束WaitCondition的等待。

Resources:
  WaitCondition:
    Type: ALIYUN::ROS::WaitCondition
    Properties:
      Count: 1
      Handle:
        Ref: WaitConditionHandle
      Timeout: 300
  WaitConditionHandle:
    Type: ALIYUN::ROS::WaitConditionHandle
  EcsInstanceGroup:
    Type: ALIYUN::ECS::InstanceGroup
    Properties:
      InstanceChargeType:
        Ref: PayType
      PeriodUnit:
        Ref: PayPeriodUnit
      Period:
        Ref: PayPeriod
      IoOptimized: optimized
      SystemDiskCategory:
        Ref: SystemDiskCategory
      SystemDiskSize:
        Ref: SystemDiskSize
      DiskMappings:
        - Category:
            Ref: DataDiskCategory
          Size:
            Ref: DataDiskSize
      VpcId:
        Ref: Vpc
      SecurityGroupId:
        Ref: EcsSecurityGroup
      VSwitchId:
        Ref: VSwitch
      MaxAmount: 2
      ImageId: centos_7
      InstanceType:
        Ref: EcsInstanceType
      Password:
        Ref: InstancePassword
      AllocatePublicIP: false
      UserData:
        Fn::Sub:
          - |
            #!/bin/bash
            # 掛盤到/disk1
            cat >> /root/InitDataDisk.sh << EOF
            #!/bin/bash
            echo "p
            n
            p
            w
            " |  fdisk -u /dev/vdb
            EOF
            /bin/bash /root/InitDataDisk.sh
            rm -f /root/InitDataDisk.sh
            rm -f InitDataDisk.sh
            mkfs -t ext4 /dev/vdb1
            cp /etc/fstab /etc/fstab.bak
            mkdir /disk1
            echo `blkid /dev/vdb1 | awk '{print $2}' | sed 's/\\\"http://g'` /disk1 ext4 defaults 0 0 >> /etc/fstab
            mount -a
            # 這里配置安裝腳本
            yum install -y nginx
            # 配置啟動腳本
            systemctl start nginx.service
            # 執行成功回調WaitConditionHandle，結束WaitCondition的等待。
            ${CurlCli} -d "{\"Data\" : \"Success\", \"status\" : \"SUCCESS\"}"
          - CurlCli:
              Fn::GetAtt:
                - WaitConditionHandle
                - CurlCli

定義ECS實例組、負載均衡實例和添加后端服務器依賴關系

您可以通過模板定義ECS實例組EcsInstanceGroup、負載均衡Slb和SlbBackendServerAttachment。

  • 通過SlbBackendServerAttachment將ECS實例組掛載到CLB實例上。更多信息，請參見ALIYUN::SLB::BackendServerAttachment。

    在ALIYUN::SLB::BackendServerAttachment中，如果不指定BackendServerWeightList的值，則BackendServerList中所有ECS實例權重都是100；當BackendServerWeightList長度小于BackendServerList時，則使用BackendServerWeightList中的最后一個值配置BackendServerList中剩余ECS實例的權重。

  • 設置DependsOn屬性可以指定資源緊跟在另一個資源后創建。為某個資源添加DependsOn屬性后，該資源僅在DependsOn屬性中指定的資源后創建。更多信息，請參見DependsOn。

  • 使用Fn::GetAtt函數獲取資源輸出屬性值。例如：EcsInstanceGroup中的InstanceIds。更多信息，請參見函數（Functions）。

Resources:
  EcsInstanceGroup:
    Type: ALIYUN::ECS::InstanceGroup
    Properties:
      InstanceChargeType:
        Ref: PayType
      PeriodUnit:
        Ref: PayPeriodUnit
      Period:
        Ref: PayPeriod
      IoOptimized: optimized
      SystemDiskCategory:
        Ref: SystemDiskCategory
      SystemDiskSize:
        Ref: SystemDiskSize
      DiskMappings:
        - Category:
            Ref: DataDiskCategory
          Size:
            Ref: DataDiskSize
      VpcId:
        Ref: Vpc
      SecurityGroupId:
        Ref: EcsSecurityGroup
      VSwitchId:
        Ref: VSwitch
      MaxAmount: 2
      ImageId: centos_7
      InstanceType:
        Ref: EcsInstanceType
      Password:
        Ref: InstancePassword
      AllocatePublicIP: false
  Slb:
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      VpcId:
        Ref: Vpc
      VSwitchId:
        Ref: VSwitch
      LoadBalancerName:
        Fn::Sub: slb-${ALIYUN::StackName}
      PayType:
        Ref: PayType
      PricingCycle:
        Ref: PayPeriodUnit
      Duration:
        Ref: PayPeriod
      AddressType: intranet
      LoadBalancerSpec:
        Ref: LoadBalancerSpec
      AutoPay: true
  SlbBackendServerAttachment:
    DependsOn:
      - EcsInstanceGroup
      - Slb
    Type: ALIYUN::SLB::BackendServerAttachment
    Properties:
      BackendServerList:
        Fn::GetAtt:
          - EcsInstanceGroup
          - InstanceIds
      LoadBalancerId:
        Ref: Slb
      BackendServerWeightList:
        - 100
        - 50

完整模板示例

ROSTemplateFormatVersion: '2015-09-01'
Description:
  en: Create new VPC and vSWitch, create one CLB, two ECS instances, and bind all ECS instances to the CLB.
  zh-cn: 新建VPC、vSWitch，創建1個CLB、2個ECS實例，并將所有ECS實例綁定到CLB上。
Parameters:
  ZoneId:
    Type: String
    AssociationProperty: ALIYUN::ECS::Instance::ZoneId
    Label:
      en: vSwitch Availability Zone
      zh-cn: 交換機可用區
  VpcCidrBlock:
    Default: 192.168.0.0/16
    Label:
      zh-cn: 專有網絡網段
      en: VPC CIDR Block
    Type: String
    Description:
      zh-cn: 新建專有網絡IP地址段范圍，推薦使用以下的IP地址段<br><font color='green'>[10.0.0.0/8]</font><br><font color='green'>[172.16.0.0/12]</font><br><font color='green'>[192.168.0.0/16]</font>
      en: New proprietary network IP address segment range, recommended use of the following IP address segments<br><font color='green'>[10.0.0.0/8]</font><br><font color='green'>[172.16.0.0/12]</font><br><font color='green'>[192.168.0.0/16]</font>
  VSwitchCidrBlock:
    Default: 192.168.0.0/24
    Type: String
    Description:
      zh-cn: 必須是所屬專有網絡的子網段，并且沒有被其他交換機占用。
      en: Must be a sub-network segment of the proprietary network and is not occupied by other vSwitches.
    Label:
      zh-cn: 交換機網段
      en: vSwitch CIDR Block
  EcsInstanceType:
    Type: String
    Label:
      en: Instance Type
      zh-cn: 實例類型
    AssociationProperty: ALIYUN::ECS::Instance::InstanceType
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
      InstanceChargeType: ${InstanceChargeType}
  SystemDiskCategory:
    Type: String
    Description:
      en: '<font color=''blue''><b>Optional values:</b></font><br>[cloud_efficiency: <font color=''green''>Efficient Cloud Disk</font>]<br>[cloud_ssd: <font color=''green''>SSD Cloud Disk</font>]<br>[cloud_essd: <font color=''green''>ESSD Cloud Disk</font>]<br>[cloud: <font color=''green''>Cloud Disk</font>]<br>[ephemeral_ssd: <font color=''green''>Local SSD Cloud Disk</font>]'
      zh-cn: '<font color=''blue''><b>可選值：</b></font><br>[cloud_efficiency: <font color=''green''>高效云盤</font>]<br>[cloud_ssd: <font color=''green''>SSD云盤</font>]<br>[cloud_essd: <font color=''green''>ESSD云盤</font>]<br>[cloud: <font color=''green''>普通云盤</font>]<br>[ephemeral_ssd: <font color=''green''>本地SSD盤</font>]'
    AssociationProperty: ALIYUN::ECS::Disk::SystemDiskCategory
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
      InstanceType: ${EcsInstanceType}
    Label:
      en: System Disk Type
      zh-cn: 系統盤類型
  SystemDiskSize:
    Default: 40
    Type: Number
    Description:
      zh-cn: 系統盤大小, 取值范圍：[40, 500], 單位：GB。
    Label:
      zh-cn: 系統盤空間
      en: System Disk Space
  DataDiskCategory:
    AssociationProperty: ALIYUN::ECS::Disk::DataDiskCategory
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
      InstanceType: ${EcsInstanceType}
    Type: String
    Description:
      zh-cn: '<font color=''blue''><b>可選值：</b></font><br>[cloud_efficiency: <font color=''green''>高效云盤</font>]<br>[cloud_ssd: <font color=''green''>SSD云盤</font>]<br>[cloud_essd: <font color=''green''>ESSD云盤</font>]<br>[cloud: <font color=''green''>普通云盤</font>]'
      en: '<font color=''blue''><b>Optional values:</b></font><br>[cloud_efficiency: <font color=''green''>Efficient Cloud Disk</font>]<br>[cloud_ssd: <font color=''green''>SSD Cloud Disk</font>]<br>[cloud_essd: <font color=''green''>ESSD Cloud Disk</font>]<br>[cloud: <font color=''green''>Cloud Disk</font>]'
    Label:
      zh-cn: 數據盤類型
      en: Data Disk Type
  DataDiskSize:
    Description:
      zh-cn: ECS實例數據盤大小，單位為GiB。取值范圍：20~32768。
    Default: 100
    MaxValue: 32768
    MinValue: 20
    Label:
      zh-cn: 數據盤空間
      en: Data Disk Space
    Type: Number
  InstancePassword:
    NoEcho: true
    Type: String
    Description:
      en: Server login password, Length 8~30, must contain three(Capital letters, lowercase letters, numbers, ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ Special symbol in).。
      zh-cn: 服務器登錄密碼,長度8~30，必須包含三項（大寫字母、小寫字母、數字、 ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ 中的特殊符號）。
    AllowedPattern: '[0-9A-Za-z\_\-\&:;''<>,=%`~!@#\(\)\$\^\*\+\|\{\}\[\]\.\?\/]+$'
    Label:
      en: Instance Password
      zh-cn: 實例密碼
    ConstraintDescription:
      en: Length 8~30, must contain three(Capital letters, lowercase letters, numbers, ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ Special symbol in).
      zh-cn: 長度8~30，必須包含三項（大寫字母、小寫字母、數字、 ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ 中的特殊符號）。
    MinLength: 8
    MaxLength: 30
    AssociationProperty: ALIYUN::ECS::Instance::Password
  PayType:
    Type: String
    Label:
      en: ECS Instance Charge Type
      zh-cn: 付費類型
    Default: PostPaid
    AllowedValues:
      - PostPaid
      - PrePaid
    AssociationProperty: ChargeType
    AssociationPropertyMetadata:
      LocaleKey: InstanceChargeType
  PayPeriodUnit:
    Type: String
    Description:
      en: The long cycle of purchasing resources. <br>Week is a Week and Month is a Month. <br> The default value is month.<br><b><font color='red'> When ECS instance types are PrePaid valid.</b></font>
      zh-cn: 購買資源時長的周期。<br>Week為周，Month為月<br>默認值為月<br><b><font color='red'>當ECS實例類型為PrePaid有效。</b></font>
    Label:
      en: Pay Period Unit
      zh-cn: 購買資源時長周期
    Default: Month
    AllowedValues:
      - Month
      - Year
    AssociationProperty: PayPeriodUnit
    AssociationPropertyMetadata:
      Visible:
        Condition:
          Fn::Not:
            Fn::Equals:
              - ${PayType}
              - PostPaid
  PayPeriod:
    Type: Number
    Label:
      en: Period
      zh-cn: 購買資源時長
    Default: 1
    AllowedValues:
      - 1
      - 2
      - 3
      - 4
      - 5
      - 6
      - 7
      - 8
      - 9
    AssociationProperty: PayPeriod
    AssociationPropertyMetadata:
      Visible:
        Condition:
          Fn::Not:
            Fn::Equals:
              - ${PayType}
              - PostPaid
  LoadBalancerSpec:
    Type: String
    AssociationProperty: ALIYUN::SLB::Instance::InstanceType
    Label:
      en: LoadBalancer Specifications
      zh-cn: 負載均衡實例規格
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
  Bandwidth:
    Description:
      zh-cn: 取值范圍：[0, 1000]，單位：Mbps。
      en: 'Value range: [0, 1000], Unit: Mbps.'
    Default: 10
    MaxValue: 1000
    Label:
      zh-cn: 負載均衡的彈性公網IP帶寬
      en: CLB Elastic IP Bandwidth
    MinValue: 1
    Type: Number
Resources:
  Vpc:
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock:
        Ref: VpcCidrBlock
      VpcName:
        Ref: ALIYUN::StackName
  VSwitch:
    Type: ALIYUN::ECS::VSwitch
    Properties:
      VSwitchName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: Vpc
      ZoneId:
        Ref: ZoneId
      CidrBlock:
        Ref: VSwitchCidrBlock
  EcsSecurityGroup:
    Type: ALIYUN::ECS::SecurityGroup
    Properties:
      SecurityGroupName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: Vpc
      SecurityGroupIngress:
        - PortRange: 80/80
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          IpProtocol: tcp
          NicType: internet
      SecurityGroupEgress:
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.0.0/0
          NicType: internet
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.0.0/0
          NicType: intranet
  WaitCondition:
    Type: ALIYUN::ROS::WaitCondition
    Properties:
      Count: 1
      Handle:
        Ref: WaitConditionHandle
      Timeout: 300
  WaitConditionHandle:
    Type: ALIYUN::ROS::WaitConditionHandle
  EcsInstanceGroup:
    Type: ALIYUN::ECS::InstanceGroup
    Properties:
      InstanceChargeType:
        Ref: PayType
      PeriodUnit:
        Ref: PayPeriodUnit
      Period:
        Ref: PayPeriod
      IoOptimized: optimized
      SystemDiskCategory:
        Ref: SystemDiskCategory
      SystemDiskSize:
        Ref: SystemDiskSize
      DiskMappings:
        - Category:
            Ref: DataDiskCategory
          Size:
            Ref: DataDiskSize
      VpcId:
        Ref: Vpc
      SecurityGroupId:
        Ref: EcsSecurityGroup
      VSwitchId:
        Ref: VSwitch
      MaxAmount: 2
      ImageId: centos_7
      InstanceType:
        Ref: EcsInstanceType
      Password:
        Ref: InstancePassword
      AllocatePublicIP: false
      UserData:
        Fn::Sub:
          - |
            #!/bin/bash
            # 掛盤到/disk1
            cat >> /root/InitDataDisk.sh << EOF
            #!/bin/bash
            echo "p
            n
            p
            w
            " |  fdisk -u /dev/vdb
            EOF
            /bin/bash /root/InitDataDisk.sh
            rm -f /root/InitDataDisk.sh
            rm -f InitDataDisk.sh
            mkfs -t ext4 /dev/vdb1
            cp /etc/fstab /etc/fstab.bak
            mkdir /disk1
            echo `blkid /dev/vdb1 | awk '{print $2}' | sed 's/\\\"http://g'` /disk1 ext4 defaults 0 0 >> /etc/fstab
            mount -a
            # 這里配置安裝腳本
            yum install -y nginx
            # 配置啟動腳本
            systemctl start nginx.service
            # 執行成功回調WaitConditionHandle，結束WaitCondition的等待。
            ${CurlCli} -d "{\"Data\" : \"Success\", \"status\" : \"SUCCESS\"}"
          - CurlCli:
              Fn::GetAtt:
                - WaitConditionHandle
                - CurlCli
  Slb:
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      VpcId:
        Ref: Vpc
      VSwitchId:
        Ref: VSwitch
      LoadBalancerName:
        Fn::Sub: slb-${ALIYUN::StackName}
      PayType:
        Ref: PayType
      PricingCycle:
        Ref: PayPeriodUnit
      Duration:
        Ref: PayPeriod
      AddressType: intranet
      LoadBalancerSpec:
        Ref: LoadBalancerSpec
      AutoPay: true
  EipSlbAddress:
    Type: ALIYUN::VPC::EIP
    Properties:
      Name:
        Ref: ALIYUN::StackName
      InternetChargeType: PayByTraffic
      Bandwidth:
        Ref: Bandwidth
  EipSlbAddressAssociation:
    Type: ALIYUN::VPC::EIPAssociation
    Properties:
      InstanceId:
        Ref: Slb
      AllocationId:
        Ref: EipSlbAddress
  SlbBackendServerAttachment:
    DependsOn:
      - EcsInstanceGroup
    Type: ALIYUN::SLB::BackendServerAttachment
    Properties:
      BackendServerList:
        Fn::GetAtt:
          - EcsInstanceGroup
          - InstanceIds
      LoadBalancerId:
        Ref: Slb
      BackendServerWeightList:
        - 100
        - 100
  SlbListener:
    DependsOn:
      - Slb
    Type: ALIYUN::SLB::Listener
    Properties:
      Persistence:
        CookieTimeout: 60
        StickySession: 'on'
        PersistenceTimeout: 180
        XForwardedFor: 'off'
        StickySessionType: insert
      ListenerPort: 80
      Bandwidth: -1
      HealthCheck:
        HttpCode: http_2xx,http_3xx,http_4xx,http_5xx
        HealthCheckType: tcp
        UnhealthyThreshold: 3
        Timeout: 5
        HealthyThreshold: 3
        Port: 80
        URI: /
        Interval: 2
      LoadBalancerId:
        Ref: Slb
      BackendServerPort: 80
      Protocol: tcp
Outputs:
  Endpoint:
    Description:
      zh-cn: 對外暴露的公網IP地址。
      en: Public IP Addresses.
    Value:
      Fn::Sub:
        - http://${ServerAddress}
        - ServerAddress:
            Fn::GetAtt:
              - EipSlbAddress
              - EipAddress

添加模板參數分組與動態獲取參數配置

在以上模板中您完成了對多種資源及其依賴關系的定義，此時模板中EcsInstanceGroup資源的InstanceType、SystemDiskCategory屬性值與Slb資源的LoadBalancerSpec屬性值為引用參數。當您在不同地域創建資源棧時，需要多次調整模板變更資源屬性值以達到部署資源棧的目的。

您可以對模板添加參數Parameters，從而提高模板的靈活性和可復用性。

添加模板參數分組

您可以在模板中使用元數據（Metadata）對Parameters中定義的參數進行分組，并定義參數分組標簽。

當您完成對模板資源和參數的定義后，可以按照不同資源和資源對應的參數進行分組。

以當前模板為例，您可以將資源按如下結果劃分。

資源參數分類

資源名稱

參數名稱

基礎網絡配置

Vpc、VSwitch、EcsSecurityGroup

ZoneId、VpcCidrBlock、VSwitchCidrBlock

負載均衡配置

Slb、EipSlbAddress

LoadBalancerSpec、Bandwidth

云服務器ECS配置

EcsInstanceGroup

PayType、PayPeriodUnit、PayPeriod、ECSInstanceType、ECSDiskSize、ECSDiskCategory、EcsInstancePassword

動態獲取參數配置

以ECSInstanceType參數為例，當你需要在ROS控制臺上對參數設置篩選條件并動態選擇參數配置時，可以根據參數對應的資源類型（ALIYUN::ECS::InstanceGroup）在AssociationProperty和AssociationPropertyMetadata文檔中查詢到該參數支持的AssociationProperty取值（ALIYUN::ECS::Instance::InstanceType），然后對篩選到的AssociationProperty查詢過濾條件為ZoneId和InstanceChargeType的AssociationPropertyMetadata取值。更多信息，請參見AssociationProperty和AssociationPropertyMetadata。

完整模板示例

ROSTemplateFormatVersion: '2015-09-01'
Description:
  en: Create new VPC and vSWitch,, create one CLB, two ECS instances, and bind all ECS instances to the CLB.
  zh-cn: 新建已有VPC、vSWitch，創建1個CLB、2個ECS實例，并將所有ECS實例綁定到CLB上。
Parameters:
  ZoneId:
    Type: String
    AssociationProperty: ALIYUN::ECS::Instance::ZoneId
    Label:
      en: vSwitch Availability Zone
      zh-cn: 交換機可用區
  VpcCidrBlock:
    Default: 192.168.0.0/16
    Label:
      zh-cn: 專有網絡網段
      en: VPC CIDR Block
    Type: String
    Description:
      zh-cn: 新建專有網絡IP地址段范圍，推薦使用以下的IP地址段<br><font color='green'>[10.0.0.0/8]</font><br><font color='green'>[172.16.0.0/12]</font><br><font color='green'>[192.168.0.0/16]</font>
      en: New proprietary network IP address segment range, recommended use of the following IP address segments<br><font color='green'>[10.0.0.0/8]</font><br><font color='green'>[172.16.0.0/12]</font><br><font color='green'>[192.168.0.0/16]</font>
  VSwitchCidrBlock:
    Default: 192.168.0.0/24
    Type: String
    Description:
      zh-cn: 必須是所屬專有網絡的子網段，并且沒有被其他交換機占用。
      en: Must be a sub-network segment of the proprietary network and is not occupied by other vSwitches.
    Label:
      zh-cn: 交換機網段
      en: vSwitch CIDR Block
  EcsInstanceType:
    Type: String
    Label:
      en: Instance Type
      zh-cn: 實例類型
    AssociationProperty: ALIYUN::ECS::Instance::InstanceType
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
      InstanceChargeType: ${InstanceChargeType}
  SystemDiskCategory:
    Type: String
    Description:
      en: '<font color=''blue''><b>Optional values:</b></font><br>[cloud_efficiency: <font color=''green''>Efficient Cloud Disk</font>]<br>[cloud_ssd: <font color=''green''>SSD Cloud Disk</font>]<br>[cloud_essd: <font color=''green''>ESSD Cloud Disk</font>]<br>[cloud: <font color=''green''>Cloud Disk</font>]<br>[ephemeral_ssd: <font color=''green''>Local SSD Cloud Disk</font>]'
      zh-cn: '<font color=''blue''><b>可選值：</b></font><br>[cloud_efficiency: <font color=''green''>高效云盤</font>]<br>[cloud_ssd: <font color=''green''>SSD云盤</font>]<br>[cloud_essd: <font color=''green''>ESSD云盤</font>]<br>[cloud: <font color=''green''>普通云盤</font>]<br>[ephemeral_ssd: <font color=''green''>本地SSD盤</font>]'
    AssociationProperty: ALIYUN::ECS::Disk::SystemDiskCategory
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
      InstanceType: ${EcsInstanceType}
    Label:
      en: System Disk Type
      zh-cn: 系統盤類型
  SystemDiskSize:
    Default: 40
    Type: Number
    Description:
      zh-cn: 系統盤大小, 取值范圍：[40, 500], 單位：GB。
      en: 'System disk size, range of values: 40-500, units: GB.'
    Label:
      zh-cn: 系統盤空間
      en: System Disk Space
  DataDiskCategory:
    AssociationProperty: ALIYUN::ECS::Disk::DataDiskCategory
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
      InstanceType: ${EcsInstanceType}
    Type: String
    Description:
      zh-cn: '<font color=''blue''><b>可選值：</b></font><br>[cloud_efficiency: <font color=''green''>高效云盤</font>]<br>[cloud_ssd: <font color=''green''>SSD云盤</font>]<br>[cloud_essd: <font color=''green''>ESSD云盤</font>]<br>[cloud: <font color=''green''>普通云盤</font>]'
      en: '<font color=''blue''><b>Optional values:</b></font><br>[cloud_efficiency: <font color=''green''>Efficient Cloud Disk</font>]<br>[cloud_ssd: <font color=''green''>SSD Cloud Disk</font>]<br>[cloud_essd: <font color=''green''>ESSD Cloud Disk</font>]<br>[cloud: <font color=''green''>Cloud Disk</font>]'
    Label:
      zh-cn: 數據盤盤類型
      en: Data Disk Type
  DataDiskSize:
    Description:
      zh-cn: ECS實例數據盤大小，單位為GiB。取值范圍：20~32768。
      en: 'ECS Instance disk size, range of values: 20-32768, units: GB.'
    Default: 100
    MaxValue: 32768
    MinValue: 20
    Label:
      zh-cn: 數據盤空間
      en: Data Disk Space
    Type: Number
  InstancePassword:
    NoEcho: true
    Type: String
    Description:
      en: Server login password, Length 8~30, must contain three(Capital letters, lowercase letters, numbers, ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ Special symbol in).
      zh-cn: 服務器登錄密碼,長度8~30，必須包含三項（大寫字母、小寫字母、數字、 ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ 中的特殊符號）。
    AllowedPattern: '[0-9A-Za-z\_\-\&:;''<>,=%`~!@#\(\)\$\^\*\+\|\{\}\[\]\.\?\/]+$'
    Label:
      en: Instance Password
      zh-cn: 實例密碼
    ConstraintDescription:
      en: Length 8~30, must contain three(Capital letters, lowercase letters, numbers, ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ Special symbol in).
      zh-cn: 長度8~30，必須包含三項（大寫字母、小寫字母、數字、 ()`~!@#$%^&*_-+=|{}[]:;'<>,.?/ 中的特殊符號）。
    MinLength: 8
    MaxLength: 30
    AssociationProperty: ALIYUN::ECS::Instance::Password
  PayType:
    Type: String
    Label:
      en: ECS Instance Charge Type
      zh-cn: 付費類型
    Default: PostPaid
    AllowedValues:
      - PostPaid
      - PrePaid
    AssociationProperty: ChargeType
    AssociationPropertyMetadata:
      LocaleKey: InstanceChargeType
  PayPeriodUnit:
    Type: String
    Description:
      en: The long cycle of purchasing resources. <br>Week is a Week and Month is a Month. <br> The default value is month.<br><b><font color='red'> When ECS instance types are PrePaid valid.</b></font>
      zh-cn: 購買資源時長的周期。<br>Week為周，Month為月<br>默認值為月<br><b><font color='red'>當ECS實例類型為PrePaid有效。</b></font>
    Label:
      en: Pay Period Unit
      zh-cn: 購買資源時長周期
    Default: Month
    AllowedValues:
      - Month
      - Year
    AssociationProperty: PayPeriodUnit
    AssociationPropertyMetadata:
      Visible:
        Condition:
          Fn::Not:
            Fn::Equals:
              - ${PayType}
              - PostPaid
  PayPeriod:
    Type: Number
    Label:
      en: Period
      zh-cn: 購買資源時長
    Default: 1
    AllowedValues:
      - 1
      - 2
      - 3
      - 4
      - 5
      - 6
      - 7
      - 8
      - 9
    AssociationProperty: PayPeriod
    AssociationPropertyMetadata:
      Visible:
        Condition:
          Fn::Not:
            Fn::Equals:
              - ${PayType}
              - PostPaid
  LoadBalancerSpec:
    Type: String
    AssociationProperty: ALIYUN::SLB::Instance::InstanceType
    Label:
      en: LoadBalancer Specifications
      zh-cn: 負載均衡實例規格
    AssociationPropertyMetadata:
      ZoneId: ${ZoneId}
  Bandwidth:
    Description:
      zh-cn: 取值范圍：[0, 1000]，單位：Mbps。
      en: 'Value range: [0, 1000], Unit: Mbps.'
    Default: 10
    MaxValue: 1000
    Label:
      zh-cn: 負載均衡的彈性公網IP帶寬
      en: CLB Elastic IP Bandwidth
    MinValue: 1
    Type: Number
Resources:
  Vpc:
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock:
        Ref: VpcCidrBlock
      VpcName:
        Ref: ALIYUN::StackName
  VSwitch:
    Type: ALIYUN::ECS::VSwitch
    Properties:
      VSwitchName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: Vpc
      ZoneId:
        Ref: ZoneId
      CidrBlock:
        Ref: VSwitchCidrBlock
  EcsSecurityGroup:
    Type: ALIYUN::ECS::SecurityGroup
    Properties:
      SecurityGroupName:
        Ref: ALIYUN::StackName
      VpcId:
        Ref: Vpc
      SecurityGroupIngress:
        - PortRange: 80/80
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          IpProtocol: tcp
          NicType: internet
      SecurityGroupEgress:
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.0.0/0
          NicType: internet
        - PortRange: '-1/-1'
          Priority: 1
          IpProtocol: all
          DestCidrIp: 0.0.0.0/0
          NicType: intranet
  WaitCondition:
    Type: ALIYUN::ROS::WaitCondition
    Properties:
      Count: 1
      Handle:
        Ref: WaitConditionHandle
      Timeout: 300
  WaitConditionHandle:
    Type: ALIYUN::ROS::WaitConditionHandle
  EcsInstanceGroup:
    Type: ALIYUN::ECS::InstanceGroup
    Properties:
      InstanceChargeType:
        Ref: PayType
      PeriodUnit:
        Ref: PayPeriodUnit
      Period:
        Ref: PayPeriod
      IoOptimized: optimized
      SystemDiskCategory:
        Ref: SystemDiskCategory
      SystemDiskSize:
        Ref: SystemDiskSize
      DiskMappings:
        - Category:
            Ref: DataDiskCategory
          Size:
            Ref: DataDiskSize
      VpcId:
        Ref: Vpc
      SecurityGroupId:
        Ref: EcsSecurityGroup
      VSwitchId:
        Ref: VSwitch
      MaxAmount: 2
      ImageId: centos_7
      InstanceType:
        Ref: EcsInstanceType
      Password:
        Ref: InstancePassword
      AllocatePublicIP: false
      UserData:
        Fn::Sub:
          - |
            #!/bin/bash
            # 掛盤到/disk1
            cat >> /root/InitDataDisk.sh << EOF
            #!/bin/bash
            echo "p
            n
            p
            w
            " |  fdisk -u /dev/vdb
            EOF
            /bin/bash /root/InitDataDisk.sh
            rm -f /root/InitDataDisk.sh
            rm -f InitDataDisk.sh
            mkfs -t ext4 /dev/vdb1
            cp /etc/fstab /etc/fstab.bak
            mkdir /disk1
            echo `blkid /dev/vdb1 | awk '{print $2}' | sed 's/\\\"http://g'` /disk1 ext4 defaults 0 0 >> /etc/fstab
            mount -a
            # 這里配置安裝腳本
            yum install -y nginx
            # 配置啟動腳本
            systemctl start nginx.service
            # 執行成功回調WaitConditionHandle，結束WaitCondition的等待。
            ${CurlCli} -d "{\"Data\" : \"Success\", \"status\" : \"SUCCESS\"}"
          - CurlCli:
              Fn::GetAtt:
                - WaitConditionHandle
                - CurlCli
  Slb:
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      VpcId:
        Ref: Vpc
      VSwitchId:
        Ref: VSwitch
      LoadBalancerName:
        Fn::Sub: slb-${ALIYUN::StackName}
      PayType:
        Ref: PayType
      PricingCycle:
        Ref: PayPeriodUnit
      Duration:
        Ref: PayPeriod
      AddressType: intranet
      LoadBalancerSpec:
        Ref: LoadBalancerSpec
      AutoPay: true
  EipSlbAddress:
    Type: ALIYUN::VPC::EIP
    Properties:
      Name:
        Ref: ALIYUN::StackName
      InternetChargeType: PayByTraffic
      Bandwidth:
        Ref: Bandwidth
  EipSlbAddressAssociation:
    Type: ALIYUN::VPC::EIPAssociation
    Properties:
      InstanceId:
        Ref: Slb
      AllocationId:
        Ref: EipSlbAddress
  SlbBackendServerAttachment:
    DependsOn:
      - EcsInstanceGroup
    Type: ALIYUN::SLB::BackendServerAttachment
    Properties:
      BackendServerList:
        Fn::GetAtt:
          - EcsInstanceGroup
          - InstanceIds
      LoadBalancerId:
        Ref: Slb
      BackendServerWeightList:
        - 100
        - 50
  SlbListener:
    DependsOn:
      - Slb
    Type: ALIYUN::SLB::Listener
    Properties:
      Persistence:
        CookieTimeout: 60
        StickySession: 'on'
        PersistenceTimeout: 180
        XForwardedFor: 'off'
        StickySessionType: insert
      ListenerPort: 80
      Bandwidth: -1
      HealthCheck:
        HttpCode: http_2xx,http_3xx,http_4xx,http_5xx
        HealthCheckType: tcp
        UnhealthyThreshold: 3
        Timeout: 5
        HealthyThreshold: 3
        Port: 80
        URI: /
        Interval: 2
      LoadBalancerId:
        Ref: Slb
      BackendServerPort: 80
      Protocol: tcp
Outputs:
  Endpoint:
    Description:
      zh-cn: 對外暴露的公網IP地址
      en: Public IP Addresses
    Value:
      Fn::Sub:
        - http://${ServerAddress}
        - ServerAddress:
            Fn::GetAtt:
              - EipSlbAddress
              - EipAddress
Metadata:
  ALIYUN::ROS::Interface:
    ParameterGroups:
      - Parameters:
          - ZoneId
          - VpcCidrBlock
          - VSwitchCidrBlock
        Label:
          default:
            zh-cn: 基礎網絡配置
            en: Basic Network Configuration
      - Parameters:
          - PayType
          - PayPeriodUnit
          - PayPeriod
        Label:
          default:
            en: PayType Configuration
            zh-cn: 付費類型
      - Parameters:
          - EcsInstanceType
          - SystemDiskCategory
          - SystemDiskSize
          - DataDiskCategory
          - DataDiskSize
          - InstancePassword
        Label:
          default:
            en: Instance Configure
            zh-cn: ECS實例配置
      - Parameters:
          - LoadBalancerSpec
          - Bandwidth
        Label:
          default:
            en: CLB Configure
            zh-cn: 負載均衡配置