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    Resource Orchestration Service:Generate a template from a resource scenario

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    Resource Orchestration Service:Generate a template from a resource scenario

    Last Updated:Jun 10, 2026

    Use a resource import scenario in Resource Orchestration Service (ROS) to generate a template from existing resources, then modify it for batch deployment.

    Use cases

    To deploy a web application, tag all related resources withapp:web to filter them during resource import. After generating a template, add parameters to make it reusable, then create a stack to batch-deploy the following resources:

    • One VPC

    • One vSwitch

    • One security group

    • Two ECS instances

    • One SLB instance

    Batch deployment

    Step 1: Create resources and add tags

    Create the required resources in their respective consoles and add the tagapp:web (tag keyapp, tag valueweb). What are tags?

    Note

    For existing resources, you only need to add tags.

    1. In the VPC console, create a VPC and a vSwitch, and add the tagapp:web to them.

      Create a VPC. Add tags to a VPC.

      Note

      To add a tag to a vSwitch, follow the same procedure as for a VPC. Click the Tag icon in the Tags column for the target vSwitch.

    2. In the ECS console, create a security group for a VPC, set Network to the VPC that you created in Step 1, and add the tag app:web.

    3. Create two ECS instances and add the tagapp:web.

      1. Select the VPC and vSwitch from Step 1.

      2. Select the security group from Step 2.

      3. Configure other parameters for the ECS instances.

      4. Add the tagapp:web to the ECS instances.

    4. In the SLB console, create an SLB instance (this example uses an Application Load Balancer instance) and add the tagapp:web.

      1. Create the SLB instance and select the VPC that you created in Step 1.

      2. Create a backend server group and add the two ECS instances from Step 3.

      3. Configure a listener and set up DNS resolution as needed.

      4. Add the tagapp:web to the SLB instance.

    Step 2: Create a resource import scenario

    Create a resource import scenario to filter the resources from Step 1: Create resources and add tags.

    1. Log on to the ROS console.

    2. In the left-side navigation pane, click Scenarios.

    3. From the region drop-down list in the top navigation bar, select the region for the resource scenario.

    4. On the Scenarios page, click Create Scenario.

    5. In the Create Scenario dialog box, enter a description for the scenario and select Resource Management as the scenario type.

    6. Define the scope of resources.

      1. In the Method section, select Source Tag.

      2. In the Source Tag section, set Tag Key toapp and Tag Value toweb.

      In the Description field, enterweb-app. Click Generate Scenario.

    7. Set the Delete Resource for the resource scenario to Retain.

      Note

      Select Retain to preserve the existing resources when the stack is deleted.

    8. Click Create.

      After the resource scenario is created, its Status changes to Created.

    Step 3: Generate a template

    1. On the Scenarios page, click the ID of the target resource scenario.

    2. On the resource scenario management page, click Create Template in the upper-right corner.

    The template supports JSON and YAML formats. The following example uses YAML.

    Full template content

    ROSTemplateFormatVersion: '2015-09-01'
Resources:
  ECSInstance_001:
    DeletionPolicy: Retain
    Type: ALIYUN::ECS::Instance
    Properties:
      DeletionProtection: false
      VSwitchId:
        Ref: ECSVSwitch_001
      VpcId:
        Ref: ECSVPC_001
      Tags:
        - Value: web
          Key: app
      SystemDiskSize: 40
      HostName: iZbp11ut2d6rr7gg78a****
      SystemDiskCategory: cloud_essd
      ImageId: centos_7_9_x64_20G_alibase_2022****.vhd
      SpotStrategy: NoSpot
      AllocatePublicIP: false
      InstanceChargeType: PostPaid
      IoOptimized: optimized
      SecurityGroupIds:
        - Ref: ECSSecurityGroup_001
      InternetChargeType: PayByTraffic
      ZoneId: cn-hangzhou-i
      InstanceName: launch-advisor-2022****
      InstanceType: ecs.g7.large
      SystemDiskPerformanceLevel: PL0
    DependsOn:
      - ECSSecurityGroup_001
      - ECSVSwitch_001
      - ECSVPC_001
  ECSInstance_002:
    DeletionPolicy: Retain
    Type: ALIYUN::ECS::Instance
    Properties:
      DeletionProtection: false
      VSwitchId:
        Ref: ECSVSwitch_001
      VpcId:
        Ref: ECSVPC_001
      Tags:
        - Value: web
          Key: app
      SystemDiskSize: 40
      HostName: iZbp11ut2d6rr7gg78a****
      SystemDiskCategory: cloud_essd
      ImageId: centos_7_9_x64_20G_alibase_2022****.vhd
      SpotStrategy: NoSpot
      AllocatePublicIP: false
      InstanceChargeType: PostPaid
      IoOptimized: optimized
      SecurityGroupIds:
        - Ref: ECSSecurityGroup_001
      InternetChargeType: PayByTraffic
      ZoneId: cn-hangzhou-i
      InstanceName: launch-advisor-2022****
      InstanceType: ecs.g7.large
      SystemDiskPerformanceLevel: PL0
    DependsOn:
      - ECSSecurityGroup_001
      - ECSVSwitch_001
      - ECSVPC_001
  ECSSecurityGroup_001:
    DeletionPolicy: Retain
    Type: ALIYUN::ECS::SecurityGroup
    Properties:
      VpcId:
        Ref: ECSVPC_001
      Description: web-sg
      SecurityGroupName: web-sg
      Tags:
        - Value: web
          Key: app
      SecurityGroupIngress:
        - PortRange: 1/65535
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: 80/80
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: 443/443
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: 22/22
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: 3389/3389
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: '-1/-1'
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: icmp
          SourcePortRange: '-1/-1'
      SecurityGroupType: normal
    DependsOn:
      - ECSVPC_001
  ECSVPC_001:
    DeletionPolicy: Retain
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock: 172.16.0.0/12
      VpcName: web-vpc
      EnableIpv6: false
      Description: web-vpc
      Tags:
        - Value: web
          Key: app
  ECSVSwitch_001:
    DeletionPolicy: Retain
    Type: ALIYUN::ECS::VSwitch
    Properties:
      VSwitchName: web-vsw
      VpcId:
        Ref: ECSVPC_001
      Description: web-vsw
      Tags:
        - Value: web
          Key: app
      ZoneId: cn-hangzhou-i
      CidrBlock: 172.16.0.0/24
    DependsOn:
      - ECSVPC_001
  SLBBackendServerAttachment_001:
    DeletionPolicy: Retain
    Type: ALIYUN::SLB::BackendServerAttachment
    Properties:
      BackendServers:
        - ServerId:
            Ref: ECSInstance_002
          Type: ecs
          Weight: 100
        - ServerId:
            Ref: ECSInstance_001
          Type: ecs
          Weight: 100
      LoadBalancerId:
        Ref: SLBLoadBalancer_001
    DependsOn:
      - SLBLoadBalancer_001
      - ECSInstance_001
      - ECSInstance_002
  SLBLoadBalancer_001:
    DeletionPolicy: Retain
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      DeletionProtection: false
      VpcId:
        Ref: ECSVPC_001
      AddressIPVersion: ipv4
      Tags:
        - Value: web
          Key: app
      SupportPrivateLink: true
      PayType: PayOnDemand
      SlaveZoneId: cn-hangzhou-h
      AddressType: intranet
      VSwitchId:
        Ref: ECSVSwitch_001
      LoadBalancerName: web-app-slb
      InternetChargeType: paybytraffic
      LoadBalancerSpec: slb.s1.small
      MasterZoneId: cn-hangzhou-i
    DependsOn:
      - ECSVPC_001
      - ECSVSwitch_001

    Template description

    The basic structure of the template is as follows:

    ROSTemplateFormatVersion: '2015-09-01' # The version of the template syntax.
Resources: {} # A list of resources.

    • ROSTemplateFormatVersion: The version of the template syntax. The value is fixed at 2015-09-01.

    • Resources: A list of resources, including their properties and dependencies. The list includes the resources from Step 1: Create resources and add tags:

      • One VPC: ECSVPC_001.

      • One vSwitch: ECSVSwitch_001.

      • One security group: ECSSecurityGroup_001.

      • Two ECS instances: ECSInstance_001 and ECSInstance_002, which are collectively referred to as ECSInstance_00X.

      • One SLB instance, which includes SLBLoadBalancer_001 and SLBBackendServerAttachment_001.

      The following figure shows the resource architecture.

      Architecture diagram

    Step 4: Make the template reusable

    The generated template hard-codes resource property values from Step 1: Create resources and add tags. To make the template reusable, replace hard-coded values such as availability zones and instance types with parameters, and add outputs.

    Before

    ROSTemplateFormatVersion: '2015-09-01' # The version of the template syntax.
Resources: {} # A list of resources.

    After

    ROSTemplateFormatVersion: '2015-09-01' # The version of the template syntax.
Description: {} # Describes the use case and architecture of the template.
Parameters: {} # Customized parameters extracted from hard-coded values.
Resources: {} # A list of resources.
Outputs: {} # Returns information such as resource properties. You can retrieve the output content from the console or by calling an API operation.

    Mapping between resource properties and parameters

    Resource name

    Properties to parameterize

    Outputs to add

    VPC: ECSVPC_001

    VPC CIDR block (VpcCidrBlock)

    None

    vSwitch: ECSVSwitch_001

    Availability zone ID (ZoneId)

    None

    vSwitch CIDR block (VSwitchCidrBlock)

    Security group: ECSSecurityGroup_001

    None

    None

    ECS instance: ECSInstance_00X

    Availability zone ID (ZoneId)

    ECS instance ID (InstanceId)

    ECS instance type (ECSInstanceType)

    ECS system disk category (SystemDiskCategory)

    SLB instance: SLBLoadBalancer_001

    Primary availability zone ID (MasterZoneId)

    IP address of the SLB instance (IpAddress)

    Backup availability zone ID (SlaveZoneId)

    SLB instance specification (LoadBalancerSpec)

    Template modification

    VPC: ECSVPC_001

    • Extract the VPC CIDR block (VpcCidrBlock) toParameters.

    • Use Ref to set CidrBlock to the Parameters section's VpcCidrBlock value.

    Before

    ROSTemplateFormatVersion: '2015-09-01'
Resources:
  ECSVPC_001:
    DeletionPolicy: Retain
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock: 172.16.0.0/12

    After

    ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  VpcCidrBlock:
    Type: String
    Label: VPC IPv4 CIDR block
    Description: The IPv4 address range of the VPC.
    Default: 172.16.0.0/12
Resources:
  ECSVPC_001:
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock:
        Ref: VpcCidrBlock
      VpcName: web-vpc
      EnableIpv6: false
      Description: web-vpc
      Tags:
        - Value: web
          Key: app
    Note

    Other ECSVPC_001 properties: ALIYUN::ECS::VPC.

    vSwitch: ECSVSwitch_001

    • Extract the availability zone ID (ZoneId) and vSwitch CIDR block (VSwitchCidrBlock) toParameters.

    • Use Ref to define the parameter ZoneId, which references the value of the Parameters section for the ZoneId parameter.

    • Use Ref to define the parameter CidrBlock and reference the value of VSwitchCidrBlock in Parameters.

    Before

    ROSTemplateFormatVersion: '2015-09-01'
Resources:
  ECSVSwitch_001:
    Type: ALIYUN::ECS::VSwitch
    Properties:
      VpcId:
        Ref: ECSVPC_001
      ZoneId: cn-hangzhou-i
      CidrBlock: 172.16.0.0/24
    DependsOn:
      - ECSVPC_001

    After

    ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  ZoneId:
    Type: String
    AssociationProperty: ALIYUN::ECS::ZoneId
    Description: The ID of the availability zone.
    Label: Availability Zone
  VSwitchCidrBlock:
    Type: String
    Label: vSwitch CIDR Block
    Description: Must be a subnet of the VPC.
    Default: 172.16.0.0/24
Resources:
  ECSVPC_001: ''
  ECSVSwitch_001:
    Type: ALIYUN::ECS::VSwitch
    Properties:
      CidrBlock:
        Ref: VSwitchCidrBlock
      VpcId:
        Ref: ECSVPC_001
      ZoneId:
        Ref: ZoneId
    DependsOn:
      - ECSVPC_001
    Note

    • AssociationProperty dynamically retrieves available resources in the selected region.AssociationPropertyMetadata adds filter conditions for dynamic parameter configuration. Setting AssociationProperty forZoneId to ALIYUN::ECS::ZoneId populates a drop-down list of availability zones. AssociationPropertyMetadata.

    • DependsOn ensures a resource is created only after its dependencies. For example, ECSVSwitch_001 is created after ECSVPC_001.

    • Other ECSVSwitch_001 properties: ALIYUN::ECS::VSwitch.

    ECS instance: ECSInstance_00X

    • Extract the availability zone ID (ZoneId), ECS instance type (ECSInstanceType), and ECS system disk category (SystemDiskCategory) to theParameters section to pass them in as parameters.

    • Use Ref to define the parameter ZoneId and reference the value of ZoneId in the Parameters section.

    • Use Ref to define the parameter InstanceType, referencing the value of ECSInstanceType in Parameters.

    • Use Ref to define the parameter SystemDiskCategory, which references the value of SystemDiskCategory in Parameters.

    Before

    ROSTemplateFormatVersion: '2015-09-01'
Resources:
  ECSVSwitch_001: ''
  ECSVPC_001: ''
  ECSSecurityGroup_001: ''
  ECSInstance_001:
    Type: ALIYUN::ECS::Instance
    Properties:
      ZoneId: cn-hangzhou-i
      InstanceType: ecs.g7.large
      SystemDiskCategory: cloud_essd
    DependsOn:
      - ECSSecurityGroup_001
      - ECSVSwitch_001
      - ECSVPC_001

    After

    ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  ZoneId: ''
  ECSInstanceType:
    Type: String
    Description: Specify an instance type that is available in the selected availability zone.
    Label: Instance Type
    AssociationProperty: ALIYUN::ECS::Instance::InstanceType
    AssociationPropertyMetadata:
      ZoneId: ZoneId
  SystemDiskCategory:
    Type: String
    Description: The category of the system disk.
    AssociationProperty: ALIYUN::ECS::Disk::SystemDiskCategory
    AssociationPropertyMetadata:
      ZoneId: ZoneId
      InstanceType: ECSInstanceType
    Label: System Disk Category
Resources:
  ECSInstance_001:
    Type: ALIYUN::ECS::Instance
    Properties:
      SystemDiskCategory:
        Ref: SystemDiskCategory
      InstanceType:
        Ref: ECSInstanceType
      ZoneId:
        Ref: ZoneId
    DependsOn:
      - ECSSecurityGroup_001
      - ECSVSwitch_001
      - ECSVPC_001
    Note

    • Setting theAssociationProperty ofECSInstanceType toALIYUN::ECS::Instance::InstanceType populates a drop-down list of ECS instance types in the current region.

    • AssociationPropertyMetadata filters results. Here,ZoneId limits results to instance types available in the specified zone.

    • Setting theAssociationProperty ofSystemDiskCategory toALIYUN::ECS::Disk::SystemDiskCategory lists available system disk types.AssociationPropertyMetadata filters byZoneId.

    • Other ECSInstance_00X properties: ALIYUN::ECS::Instance.

    SLB instance: SLBLoadBalancer_001

    • Extract the primary availability zone ID (MasterZoneId), backup availability zone ID (SlaveZoneId), and SLB instance specification (LoadBalancerSpec) to theParameters section to pass them in as parameters.

    • Use Ref to define the parameter MasterZoneId, referencing in Parameters the value of ZoneId.

    • Use Ref to define the parameter SlaveZoneId, which references from Parameters the value of SlaveZoneId.

    • Use Ref to define the parameter LoadBalancerSpec, referencing the value of LoadBalancerSpec in Parameters.

    Before

    ROSTemplateFormatVersion: '2015-09-01'
Resources:
  ECSVPC_001: ''
  ECSVSwitch_001: ''
  SLBLoadBalancer_001:
    DeletionPolicy: Retain
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      MasterZoneId: cn-hangzhou-i
      SlaveZoneId: cn-hangzhou-h
      LoadBalancerSpec: slb.s1.small
    DependsOn:
      - ECSVPC_001
      - ECSVSwitch_001

    After

    ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  ZoneId: ''
  SlaveZoneId:
    Type: String
    Description: The ID of the backup availability zone.
    Label: SLB Backup Zone
  LoadBalancerSpec:
    Type: String
    AssociationProperty: ALIYUN::SLB::Instance::InstanceType
    Description: The specification of the SLB instance.
    Label: Specification
    AssociationPropertyMetadata:
      ZoneId: ZoneId
Resources:
  ECSVPC_001: ''
  ECSVSwitch_001: ''
  SLBLoadBalancer_001:
    DeletionPolicy: Retain
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      LoadBalancerName: web-app-slb
      LoadBalancerSpec:
        Ref: LoadBalancerSpec
      SlaveZoneId:
        Ref: SlaveZoneId
      MasterZoneId:
        Ref: ZoneId
    DependsOn:
      - ECSVPC_001
      - ECSVSwitch_001
    Note

    • AssociationProperty retrieves available resources in the selected region.AssociationPropertyMetadata adds filter conditions for dynamic parameter configuration.

    • Setting theAssociationProperty ofZoneId toALIYUN::ECS::ZoneId populates a drop-down list of availability zones.

    • Setting theAssociationProperty ofLoadBalancerSpec toALIYUN::SLB::Instance::InstanceType populates a drop-down list of SLB specifications. AssociationPropertyMetadata.

    • Other SLBLoadBalancer_001 properties: ALIYUN::SLB::LoadBalancer.

    Output: IP address of the SLB instance

    Other return values: ALIYUN::SLB::LoadBalancer.

    Outputs:
  SLBListenerIpAddress:
    Description: The IP address of the load balancer.
    Value:
      Fn::GetAtt:
        - SLBLoadBalancer_001
        - IpAddress

    Output: ECS instance IDs

    Other return values: ALIYUN::ECS::Instance.

    Outputs:
  ECSInstance_001:
    Description: The instance ID of the created ECS instance.
    Value:
      Fn::GetAtt:
        - ECSInstance_001
        - InstanceId
  ECSInstance_002:
    Description: The instance ID of the created ECS instance.
    Value:
      Fn::GetAtt:
        - ECSInstance_002
        - InstanceId

    Reusable template

    ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  ZoneId:
    Type: String
    AssociationProperty: ALIYUN::ECS::Instance:ZoneId
    Description: The ID of the availability zone.
    Label: Availability Zone
  SlaveZoneId:
    Type: String
    Description: The ID of the backup availability zone.
    Label: SLB Backup Zone
  VpcCidrBlock:
    Type: String
    Label: VPC IPv4 CIDR Block
    Description: The IPv4 address range of the VPC.
    Default: 172.16.0.0/12
  VSwitchCidrBlock:
    Type: String
    Label: vSwitch CIDR Block
    Description: Must be a subnet of the VPC.
    Default: 172.16.0.0/24
  ECSInstanceType:
    Type: String
    Description: The instance type of the ECS instance.
    Label: Instance Type
    AssociationProperty: ALIYUN::ECS::Instance::InstanceType
    AssociationPropertyMetadata:
      ZoneId: ZoneId
  SystemDiskCategory:
    Type: String
    Description: The category of the system disk.
    AssociationProperty: ALIYUN::ECS::Disk::SystemDiskCategory
    AssociationPropertyMetadata:
      ZoneId: ZoneId
      InstanceType: ECSInstanceType
    Label: System Disk Category
  LoadBalancerSpec:
    Type: String
    AssociationProperty: ALIYUN::SLB::Instance::InstanceType
    Description: The specification of the SLB instance.
    Label: SLB Specification
    AssociationPropertyMetadata:
      ZoneId: ZoneId
    Default: slb.s1.small
Resources:
  ECSVPC_001:
    Type: ALIYUN::ECS::VPC
    Properties:
      CidrBlock:
        Ref: VpcCidrBlock
      VpcName: web-vpc
      EnableIpv6: false
      Description: web-vpc
      Tags:
        - Value: web
          Key: app
  ECSVSwitch_001:
    Type: ALIYUN::ECS::VSwitch
    Properties:
      VSwitchName: web-vsw
      VpcId:
        Ref: ECSVPC_001
      Description: web-vsw
      Tags:
        - Value: web
          Key: app
      ZoneId:
        Ref: ZoneId
      CidrBlock:
        Ref: VSwitchCidrBlock
    DependsOn:
      - ECSVPC_001
  ECSSecurityGroup_001:
    Type: ALIYUN::ECS::SecurityGroup
    Properties:
      VpcId:
        Ref: ECSVPC_001
      Description: web-sg
      SecurityGroupName: web-sg
      Tags:
        - Value: web
          Key: app
      SecurityGroupIngress:
        - PortRange: 80/80
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: 443/443
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
        - PortRange: 22/22
          NicType: intranet
          Priority: 1
          SourceCidrIp: 0.0.0.0/0
          Policy: accept
          IpProtocol: tcp
      SecurityGroupType: normal
    DependsOn:
      - ECSVPC_001
  ECSInstance_001:
    Type: ALIYUN::ECS::Instance
    Properties:
      DeletionProtection: true
      SystemDiskCategory:
        Ref: SystemDiskCategory
      VpcId:
        Ref: ECSVPC_001
      Description: web-ecs
      Tags:
        - Value: web
          Key: app
      VSwitchId:
        Ref: ECSVSwitch_001
      SystemDiskSize: 40
      ImageId: centos_7_9_x64_20G_alibase_2022****.vhd
      SpotStrategy: NoSpot
      AllocatePublicIP: false
      InstanceChargeType: PostPaid
      IoOptimized: optimized
      SecurityGroupIds:
        - Ref: ECSSecurityGroup_001
      InternetChargeType: PayByTraffic
      ZoneId:
        Ref: ZoneId
      InstanceName: web-ecs002
      InstanceType:
        Ref: ECSInstanceType
      SystemDiskPerformanceLevel: PL0
    DependsOn:
      - ECSSecurityGroup_001
      - ECSVSwitch_001
      - ECSVPC_001
  ECSInstance_002:
    Type: ALIYUN::ECS::Instance
    Properties:
      DeletionProtection: true
      SystemDiskCategory:
        Ref: SystemDiskCategory
      VpcId:
        Ref: ECSVPC_001
      Description: web-ecs
      Tags:
        - Value: web
          Key: app
      VSwitchId:
        Ref: ECSVSwitch_001
      SystemDiskSize: 40
      ImageId: centos_7_9_x64_20G_alibase_2022****.vhd
      SpotStrategy: NoSpot
      AllocatePublicIP: false
      InstanceChargeType: PostPaid
      IoOptimized: optimized
      SecurityGroupIds:
        - Ref: ECSSecurityGroup_001
      InternetChargeType: PayByTraffic
      ZoneId:
        Ref: ZoneId
      InstanceName: web-ecs001
      InstanceType:
        Ref: ECSInstanceType
      SystemDiskPerformanceLevel: PL0
    DependsOn:
      - ECSSecurityGroup_001
      - ECSVSwitch_001
      - ECSVPC_001
  SLBListener_001:
    Type: ALIYUN::SLB::Listener
    Properties:
      AclStatus: 'off'
      Protocol: tcp
      Description: tcp_80
      HealthCheck:
        Interval: 2
        HealthyThreshold: 3
        Switch: 'on'
        UnhealthyThreshold: 3
        HealthCheckType: tcp
      LoadBalancerId:
        Ref: SLBLoadBalancer_001
      ListenerPort: 80
      Bandwidth: -1
      BackendServerPort: 80
      Scheduler: tch
      StartListener: true
      Persistence:
        PersistenceTimeout: 0
    DependsOn:
      - SLBLoadBalancer_001
  SLBLoadBalancer_001:
    Type: ALIYUN::SLB::LoadBalancer
    Properties:
      DeletionProtection: false
      VpcId:
        Ref: ECSVPC_001
      AddressIPVersion: ipv4
      Tags:
        - Value: web
          Key: app
      SupportPrivateLink: true
      PayType: PayOnDemand
      AddressType: intranet
      VSwitchId:
        Ref: ECSVSwitch_001
      LoadBalancerName: web-slb
      InternetChargeType: paybytraffic
      LoadBalancerSpec:
        Ref: LoadBalancerSpec
      MasterZoneId:
        Ref: ZoneId
      SlaveZoneId:
        Ref: SlaveZoneId
    DependsOn:
      - ECSVPC_001
      - ECSVSwitch_001
  SLBBackendServerAttachment_001:
    Type: ALIYUN::SLB::BackendServerAttachment
    Properties:
      BackendServers:
        - ServerId:
            Ref: ECSInstance_001
          Type: ecs
          Weight: 100
        - ServerId:
            Ref: ECSInstance_002
          Type: ecs
          Weight: 100
      LoadBalancerId:
        Ref: SLBLoadBalancer_001
    DependsOn:
      - SLBLoadBalancer_001
      - ECSInstance_001
      - ECSInstance_002
Outputs:
  ECSInstance_001:
    Description: The instance ID of the created ECS instance.
    Value:
      Fn::GetAtt:
        - ECSInstance_001
        - InstanceId
  ECSInstance_002:
    Description: The instance ID of the created ECS instance.
    Value:
      Fn::GetAtt:
        - ECSInstance_002
        - InstanceId
  SLBListenerIpAddress:
    Description: The IP address of the load balancer.
    Value:
      Fn::GetAtt:
        - SLBLoadBalancer_001
        - IpAddress

    (Optional) Step 5: Deploy resources in batches

    Use the reusable template to create a stack and batch-deploy resources.

    1. In the ROS console, use the reusable template from Step 4: Make the template reusable to create a stack. On the Configure Template Parameters page, set parameters such as Availability Zone (for example, China (Hangzhou) Zone I), SLB Backup Zone, VPC IPv4 CIDR Block (for example, 172.16.0.0/12), and vSwitch CIDR Block. Then, select an Instance Type, such as ecs.c7.large (a c7 compute-optimized instance with 2 vCPUs and 4 GiB of memory).

    2. On the stack details page, click the Parameter tab to view details about the deployed resources.