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资源编排:使用Count功能批量创建资源

更新时间:Dec 27, 2023

资源编排服务ROS(Resource Orchestration Service)支持Count功能,用于批量创建资源。本文将以批量创建ECS实例和EIP,并为ECS实例绑定EIP为例,为您介绍如何使用Count功能。

背景信息

ALIYUN::VPC::EIP类型用于申请弹性公网IP(EIP)。如果需要申请多个弹性公网IP,则需要在模板中编写多个ALIYUN::VPC::EIP资源,这样模板会变得冗长。此时您可以使用Count功能批量创建资源。Count功能详情,请参见Count。此外,使用Count批量创建多组资源时可以通过为资源指定DependsOn并设置参数(ParallelCount)进行资源创建的并发控制。

步骤一:编写模板

您可以使用Count功能编写模板,创建以下资源:

  • 1个VPC(专有网络)

  • 1个vSwitch(交换机)

  • 1个SecurityGroup(安全组)

  • 4个ECS(按量付费的ECS)

  • 4个EIP(弹性公网IP)

模板示例代码和模板说明如下:

  • 模板示例代码

    ROSTemplateFormatVersion: '2015-09-01'
    Parameters:
      Count:
        Type: Number
        Default: 4
      ZoneId:
        Type: String
      InstanceType:
        Type: String
        Default: ecs.c6.large
      Password:
        Type: String
        Default: Abc1****
        NoEcho: true
      ParallelCount:
        Type: Number
        Default: 2
      SystemDiskCategory:
        Type: String
    Resources:
      Vpc:
        Type: ALIYUN::ECS::VPC
        Properties:
          CidrBlock: 10.0.0.0/8
          VpcName: test-resource-count
      VSwitch:
        Type: ALIYUN::ECS::VSwitch
        Properties:
          CidrBlock: 10.0.10.0/24
          ZoneId:
            Ref: ZoneId
          VpcId:
            Ref: Vpc
      SecurityGroup:
        Type: ALIYUN::ECS::SecurityGroup
        Properties:
          SecurityGroupName: test-resource-count
          VpcId:
            Ref: Vpc
      Eip:
        Type: ALIYUN::VPC::EIP
        Count:
          Ref: Count
        DependsOn:
          Fn::Select:
            - Fn::Calculate:
                - 1-{0}//{1}
                - 0
                - - Fn::Min:
                      - Ref: ALIYUN::Index
                      - Ref: ParallelCount
                  - Ref: ParallelCount
            - - Fn::Replace:
                  - index:
                      Fn::Calculate:
                        - '{0}-{1}'
                        - 0
                        - - Ref: ALIYUN::Index
                          - Ref: ParallelCount
                  - Eip[index]
        Properties:
          Bandwidth: 5
      Servers:
        Type: ALIYUN::ECS::InstanceGroup
        Properties:
          ImageId: centos_7
          InstanceType:
            Ref: InstanceType
          VpcId:
            Ref: Vpc
          VSwitchId:
            Ref: VSwitch
          SecurityGroupId:
            Ref: SecurityGroup
          Password:
            Ref: Password
          AllocatePublicIP: false
          MaxAmount:
            Ref: Count
          SystemDiskCategory:
            Ref: SystemDiskCategory
      EipBind:
        Type: ALIYUN::VPC::EIPAssociation
        Count:
          Ref: Count
        DependsOn:
          Fn::Select:
            - Fn::Calculate:
                - 1-{0}//{1}
                - 0
                - - Fn::Min:
                      - Ref: ALIYUN::Index
                      - Ref: ParallelCount
                  - Ref: ParallelCount
            - - Fn::Replace:
                  - index:
                      Fn::Calculate:
                        - '{0}-{1}'
                        - 0
                        - - Ref: ALIYUN::Index
                          - Ref: ParallelCount
                  - EipBind[index]
        Properties:
          InstanceId:
            Fn::Select:
              - Ref: ALIYUN::Index
              - Fn::GetAtt:
                  - Servers
                  - InstanceIds
          AllocationId:
            Fn::Select:
              - Ref: ALIYUN::Index
              - Ref: Eip
    Outputs:
      InstanceIds:
        Value:
          Fn::GetAtt:
            - Servers
            - InstanceIds
      AllocationIds:
        Value:
          Ref: Eip
      EipAddresses:
        Value:
          Fn::GetAtt:
            - Eip
            - EipAddress
  • 模板说明

    • 创建4个EIP。

      Count取值为4。使用Count功能时,ParallelCount取值为2,此时会分两批创建4个EIP资源。通过ROS的预处理,会生成名为Eip[0]和Eip[1](第一批)、Eip[2]和Eip[3](第二批)的4个EIP资源。

      Eip:
        Type: ALIYUN::VPC::EIP
        Count:
          Ref: Count
        DependsOn:
          Fn::Select:
            - Fn::Calculate:
                - 1-{0}//{1}
                - 0
                - - Fn::Min:
                      - Ref: ALIYUN::Index
                      - Ref: ParallelCount
                  - Ref: ParallelCount
            - - Fn::Replace:
                  - index:
                      Fn::Calculate:
                        - '{0}-{1}'
                        - 0
                        - - Ref: ALIYUN::Index
                          - Ref: ParallelCount
                  - Eip[index]
        Properties:
          Bandwidth: 5
    • 创建4个ECS实例。

      Count取值为4。将ALIYUN::ECS::InstanceGroup的MaxAmount指定为Count,取值为4,生成4个ECS资源。

      Servers:
        Type: ALIYUN::ECS::InstanceGroup
        Properties:
          ImageId: centos_7
          InstanceType:
            Ref: InstanceType
          VpcId:
            Ref: Vpc
          VSwitchId:
            Ref: VSwitch
          SecurityGroupId:
            Ref: SecurityGroup
          Password:
            Ref: Password
          AllocatePublicIP: false
          MaxAmount:
            Ref: Count
          SystemDiskCategory:
            Ref: SystemDiskCategory
    • 创建4个EipBind资源,通过ALIYUN::Index伪参数逐一绑定ECS实例和EIP。

      Count取值为4。使用Count功能时,ParallelCount取值为2,此时会分两批创建4个EipBind资源。通过ROS的预处理,会生成名为EipBind[0]和EipBind[1](第一批)、EipBind[2]和EipBind[3](第二批)的4个资源。ALIYUN::Index在Count中使用,在预处理时会被替换为相应的数值。本示例中将逐一绑定ECS实例与EIP,即第1个实例绑定Eip[0]、第2个实例绑定Eip[1]、第3个实例绑定Eip[2]、第4个实例绑定Eip[3]。

      EipBind:
        Type: ALIYUN::VPC::EIPAssociation
        Count:
          Ref: Count
        DependsOn:
          Fn::Select:
            - Fn::Calculate:
                - 1-{0}//{1}
                - 0
                - - Fn::Min:
                      - Ref: ALIYUN::Index
                      - Ref: ParallelCount
                  - Ref: ParallelCount
            - - Fn::Replace:
                  - index:
                      Fn::Calculate:
                        - '{0}-{1}'
                        - 0
                        - - Ref: ALIYUN::Index
                          - Ref: ParallelCount
                  - EipBind[index]
        Properties:
          InstanceId:
            Fn::Select:
              - Ref: ALIYUN::Index
              - Fn::GetAtt:
                  - Servers
                  - InstanceIds
          AllocationId:
            Fn::Select:
              - Ref: ALIYUN::Index
              - Ref: Eip

步骤二:创建资源栈

  1. 登录资源编排控制台

  2. 在左侧导航栏单击资源栈

  3. 在顶部菜单栏的地域下拉列表,选择资源栈的所在地域,例如:华东1(杭州)。

  4. 资源栈列表页面,单击创建资源栈,然后在下拉列表中选择使用ROS

  5. 选择模板页面的指定模板区域,单击选择已有模板

  6. 模板录入方式区域单击输入模板,输入步骤一:编写模板中编写的模板内容,然后单击下一步

  7. 配置参数页面,根据控制台提示,配置资源栈名称模板参数

  8. 配置资源栈区块,根据控制台提示,配置资源栈策略失败时回滚超时设置删除保护RAM角色标签资源组,然后单击下一步

    资源的创建或更新未在超时设置的时间内完成,系统自动判断该操作失败,再根据失败时回滚设置,判断是否回滚到创建或更新资源之前的状态。

  9. 合规预检页面,完成合规检测,然后单击下一步

    说明

    目前合规预检功能仅支持为部分资源提供合规预检功能。更多信息,请参见资源编排支持合规预检

    1. 检测规则区域,添加检测规则。

      您可以根据ROS模板中的云资源选择需要检测的规则。

    2. 单击开始检测

      您可以根据不合规或不适用资源的修正方案修改模板内容,从而保证资源的合规性。

  10. 检查并确认页面,单击创建

步骤三(可选):查询资源和模板

资源栈创建成功后,您可以按需在资源栈详情页查询经过ROS预处理的资源和模板信息。

  1. 在资源栈详情页,单击资源页签,查询资源信息。

  2. 在资源栈详情页,单击模板页签,查询模板信息。

    本文示例中,预处理后的模板如下:

    ROSTemplateFormatVersion: '2015-09-01'
    Resources:
      EipBind[1]:
        Type: ALIYUN::VPC::EIPAssociation
        Properties:
          InstanceId:
            Fn::Select:
              - 1
              - Fn::GetAtt:
                  - Servers
                  - InstanceIds
          AllocationId:
            Ref: Eip[1]
      Eip[1]:
        Type: ALIYUN::VPC::EIP
        Properties:
          Bandwidth: 5
      SecurityGroup:
        Type: ALIYUN::ECS::SecurityGroup
        Properties:
          VpcId:
            Ref: Vpc
          SecurityGroupName: test-resource-count
      Servers:
        Type: ALIYUN::ECS::InstanceGroup
        Properties:
          SystemDiskCategory:
            Ref: SystemDiskCategory
          VpcId:
            Ref: Vpc
          SecurityGroupId:
            Ref: SecurityGroup
          ImageId: centos_7
          AllocatePublicIP: false
          VSwitchId:
            Ref: VSwitch
          Password:
            Ref: Password
          InstanceType:
            Ref: InstanceType
          MaxAmount:
            Ref: Count
      Eip[2]:
        Type: ALIYUN::VPC::EIP
        Properties:
          Bandwidth: 5
        DependsOn: Eip[0]
      Eip[0]:
        Type: ALIYUN::VPC::EIP
        Properties:
          Bandwidth: 5
      Vpc:
        Type: ALIYUN::ECS::VPC
        Properties:
          VpcName: test-resource-count
          CidrBlock: 10.0.0.0/8
      Eip[3]:
        Type: ALIYUN::VPC::EIP
        Properties:
          Bandwidth: 5
        DependsOn: Eip[1]
      VSwitch:
        Type: ALIYUN::ECS::VSwitch
        Properties:
          VpcId:
            Ref: Vpc
          CidrBlock: 10.0.10.0/24
          ZoneId:
            Ref: ZoneId
      EipBind[3]:
        Type: ALIYUN::VPC::EIPAssociation
        Properties:
          InstanceId:
            Fn::Select:
              - 3
              - Fn::GetAtt:
                  - Servers
                  - InstanceIds
          AllocationId:
            Ref: Eip[3]
        DependsOn: EipBind[1]
      EipBind[0]:
        Type: ALIYUN::VPC::EIPAssociation
        Properties:
          InstanceId:
            Fn::Select:
              - 0
              - Fn::GetAtt:
                  - Servers
                  - InstanceIds
          AllocationId:
            Ref: Eip[0]
      EipBind[2]:
        Type: ALIYUN::VPC::EIPAssociation
        Properties:
          InstanceId:
            Fn::Select:
              - 2
              - Fn::GetAtt:
                  - Servers
                  - InstanceIds
          AllocationId:
            Ref: Eip[2]
        DependsOn: EipBind[0]
    Parameters:
      Count:
        Default: 4
        Type: Number
      SystemDiskCategory:
        Type: String
      ZoneId:
        Type: String
      Password:
        Default: Abc1****
        NoEcho: true
        Type: String
      InstanceType:
        Default: ecs.c6.large
        Type: String
      ParallelCount:
        Default: 2
        Type: Number
    Outputs:
      AllocationIds:
        Value:
          - Ref: Eip[0]
          - Ref: Eip[1]
          - Ref: Eip[2]
          - Ref: Eip[3]
      InstanceIds:
        Value:
          Fn::GetAtt:
            - Servers
            - InstanceIds
      EipAddresses:
        Value:
          - Fn::GetAtt:
              - Eip[0]
              - EipAddress
          - Fn::GetAtt:
              - Eip[1]
              - EipAddress
          - Fn::GetAtt:
              - Eip[2]
              - EipAddress
          - Fn::GetAtt:
              - Eip[3]
              - EipAddress