ALIYUN::FC::Function is used to create a function. A function is an object that the system uses for scheduling and execution. Functions must be associated with services. All functions of a service share the same properties as the service, such as service authorizations and logging configurations.

Syntax

{
  "Type": "ALIYUN::FC::Function",
  "Properties": {
    "Code": Map,
    "FunctionName": String,
    "ServiceName": String,
    "MemorySize": Integer,
    "InstanceConcurrency": Integer,
    "EnvironmentVariables": Map,
    "Initializer": String,
    "Handler": String,
    "Timeout": Integer,
    "InitializationTimeout": Integer,
    "CustomContainerConfig": Map,
    "AsyncConfiguration": Map,
    "CAPort": Integer,
    "Runtime": String,
    "Description": String
  }
}

Properties

Property Type Required Editable Description Constraint
Initializer String No Yes The entry point for Function Compute to initialize the created function. The format is determined by the programming language.
InitializationTimeout Integer No Yes The timeout period for Function Compute to initialize the function. Valid values: 1 to 300.

Unit: seconds.

Default value: 3.

If the function is not initialized within the specified period, Function Compute terminates the initialization.
Code Map No Yes The code that contains the function invocation. The code must be packaged into a ZIP file. For more information, see Code properties.
Description String No Yes The description of the function. None
ServiceName String Yes No The name of the service. The name must be 1 to 128 characters in length.
MemorySize Integer No Yes The memory size of the function. Valid values: 128 to 3072. The value must be a multiple of 64.

Unit: MB.
InstanceConcurrency Integer No Yes The maximum number of requests that can be concurrently processed by a single instance. Valid values: 1 to 100.
Note Python functions do not support this parameter.
EnvironmentVariables Map No Yes The environment variables for the function. None
Handler String Yes Yes The entry point for Function Compute to invoke the function. For example, if you set Handler to index.handler when you create a Python function, Function Compute loads the handler function defined in the index.py file. The format is determined by the programming language.
Timeout Integer No Yes The timeout period for Function Compute to invoke the function. Valid values: 1 to 600.

Default value: 3.

Unit: seconds.

If the function is not invoked within the specified period, Function Compute terminates the invocation.

Runtime String Yes Yes The runtime environment of the function. Valid values: nodejs6, nodejs8, nodejs10, nodejs12, python2.7, python3, java8, custom, and custom-container.
FunctionName String Yes No The name of the function. The name must be 1 to 128 characters in length and can contain letters, digits, underscores (_), and hyphens (-). It must start with a letter or underscore (_).
CustomContainerConfig Map No Yes The configurations of the runtime environment when Runtime is set to custom-container. If you specify this parameter, you can use a custom container image to invoke functions. For more information, see CustomContainerConfig properties.
CAPort Integer No Yes The port on which the HTTP server is listening. Default value: 9000.
Note This parameter takes effect only when the Runtime parameter is set to custom or custom-container.
AsyncConfiguration Map No Yes The asynchronous invocation configurations. For more information, see AsyncConfiguration properties.

Code syntax

"Code": {
  "OssBucketName": String,
  "OssObjectName": String,
  "ZipFile": String,
  "SourceCode": String
}

Code properties

Property Type Required Editable Description Constraint
OssBucketName String No Yes The name of the bucket where the function code ZIP file is stored. None
OssObjectName String No Yes The name of the object where the function code ZIP file is stored. None
ZipFile String No Yes The Base64-encoded ZIP file to be uploaded in the request body. None
SourceCode String No Yes The source code of the function. Node.js, PHP, and Python code is supported. The code can be up to 4,096 characters in length. ROS writes the value of this parameter into a UTF-8 encoded file that is named index. When the ZipFile, SourceCode, and OssBucketName (or OssObjectName) parameters are all specified, the three parameters are in descending order of priority.

CustomContainerConfig syntax

"CustomContainerConfig": {
  "Command": String,
  "Args": String,
  "Image": String
}

CustomContainerConfig properties

Property Type Required Editable Description Constraint
Command String No Yes The URL of the container image. Example: registry-vpc.cn-hangzhou.aliyuncs.com/fc-demo/helloworld:v1beta1.
Args String No Yes The startup arguments of the container. Example: ["-arg1", "value1"].
Image String Yes Yes The commands run by the container. Example: ["/code/myserver"].

AsyncConfiguration syntax

"AsyncConfiguration": {
  "Destination": Map
  "MaxAsyncRetryAttempts": Integer,
  "MaxAsyncEventAgeInSeconds": Integer
}

AsyncConfiguration properties

Property Type Required Editable Description Constraint
Destination Map No No The destination of the asynchronous invocation. For more information, see Destination property.
MaxAsyncRetryAttempts Integer No Yes The maximum number of retries for the asynchronous invocation. None
MaxAsyncEventAgeInSeconds Integer No Yes The maximum lifetime of messages. None

Destination syntax

"Destination": {
  "OnSuccess": String,
  "OnFailure": String
}

Destination property

Property Type Required Editable Description Constraint
OnSuccess String No Yes Specifies the destination that Function Compute calls when the function is invoked. None
OnFailure String No Yes Specifies the destination that Function Compute calls when invocation of the function fails due to a system error or an error of the function. None

Response parameters

Fn::GetAtt

  • FunctionId: the unique ID generated by the system for each function.
  • ServiceName: the name of the service to which the function belongs.
  • ARN: the Alibaba Cloud Resource Name (ARN) of the function.
  • FunctionName: the name of the function.

Examples

JSON format 

{
  "ROSTemplateFormatVersion": "2015-09-01",
  "Parameters": {
    "MemorySize": {
      "Type": "Number",
      "Description": "The amount of memory that is used to invoke the function. Unit: MB. Function Compute uses this value to allocate CPU resources proportionally. Defaults to 128 MB. It can be multiple of 64 MB and between 128 MB and 3072 MB.",
      "MinValue": 128,
      "MaxValue": 3072,
      "Default": 128
    },
    "Description": {
      "Type": "String",
      "Description": "Function description"
    },
    "Timeout": {
      "Type": "Number",
      "Description": "The maximum time duration a function can run, in seconds. After which Function Compute terminates the execution. Defaults to 3 seconds, and can be between 1 to 600 seconds.",
      "MinValue": 1,
      "MaxValue": 600,
      "Default": 3
    },
    "Handler": {
      "Type": "String",
      "Description": "The function execution entry point."
    },
    "CustomContainerConfig": {
      "Type": "Json",
      "Description": "Custom container runtime related configuration. After configuration, the function can be replaced with a custom container to execute the function"
    },
    "Code": {
      "Type": "Json",
      "Description": "The code that contains the function implementation."
    },
    "AsyncConfiguration": {
      "Type": "Json",
      "Description": "Configuration of asynchronous function calls"
    },
    "FunctionName": {
      "Type": "String",
      "Description": "Function name"
    },
    "CAPort": {
      "Type": "Number",
      "Description": "Custom runtime and custom container runtime dedicated fields, which represent the port that the started custom http server listens to. The default value is 9000",
      "Default": 9000
    },
    "Runtime": {
      "Type": "String",
      "Description": "The function runtime environment. Supporting nodejs6, nodejs8, nodejs10, nodejs12, python2.7, python3, java8, custom, custom-container and so on"
    },
    "EnvironmentVariables": {
      "Type": "Json",
      "Description": "The environment variable set for the function, you can get the value of the environment variable in the function."
    },
    "ServiceName": {
      "Type": "String",
      "Description": "Service name",
      "MinLength": 1,
      "MaxLength": 128
    },
    "Initializer": {
      "Type": "String",
      "Description": "the entry point of the initializer"
    },
    "InitializationTimeout": {
      "Type": "Number",
      "Description": "the max execution time of the initializer, in second"
    },
    "InstanceConcurrency": {
      "Type": "Number",
      "Description": "Function instance concurrency. Value can be between 1 to 100.",
      "MinValue": 1,
      "MaxValue": 100
    }
  },
  "Resources": {
    "Function": {
      "Type": "ALIYUN::FC::Function",
      "Properties": {
        "MemorySize": {
          "Ref": "MemorySize"
        },
        "Description": {
          "Ref": "Description"
        },
        "Timeout": {
          "Ref": "Timeout"
        },
        "Handler": {
          "Ref": "Handler"
        },
        "CustomContainerConfig": {
          "Ref": "CustomContainerConfig"
        },
        "Code": {
          "Ref": "Code"
        },
        "AsyncConfiguration": {
          "Ref": "AsyncConfiguration"
        },
        "FunctionName": {
          "Ref": "FunctionName"
        },
        "CAPort": {
          "Ref": "CAPort"
        },
        "Runtime": {
          "Ref": "Runtime"
        },
        "EnvironmentVariables": {
          "Ref": "EnvironmentVariables"
        },
        "ServiceName": {
          "Ref": "ServiceName"
        },
        "Initializer": {
          "Ref": "Initializer"
        },
        "InitializationTimeout": {
          "Ref": "InitializationTimeout"
        },
        "InstanceConcurrency": {
          "Ref": "InstanceConcurrency"
        }
      }
    }
  },
  "Outputs": {
    "FunctionId": {
      "Description": "The function ID",
      "Value": {
        "Fn::GetAtt": [
          "Function",
          "FunctionId"
        ]
      }
    },
    "FunctionName": {
      "Description": "The function name",
      "Value": {
        "Fn::GetAtt": [
          "Function",
          "FunctionName"
        ]
      }
    },
    "ServiceName": {
      "Description": "The service name",
      "Value": {
        "Fn::GetAtt": [
          "Function",
          "ServiceName"
        ]
      }
    },
    "ARN": {
      "Description": "The ARN for ALIYUN::ROS::CustomResource",
      "Value": {
        "Fn::GetAtt": [
          "Function",
          "ARN"
        ]
      }
    }
  }
}

YAML format 

ROSTemplateFormatVersion: '2015-09-01'
Parameters:
  MemorySize:
    Type: Number
    Description: >-
      The amount of memory that is used to invoke the function. Unit: MB. Function Compute
      uses this value to allocate CPU resources proportionally. Defaults to 128
      MB. It can be multiple of 64 MB and between 128 MB and 3072 MB.
    MinValue: 128
    MaxValue: 3072
    Default: 128
  Description:
    Type: String
    Description: Function description
  Timeout:
    Type: Number
    Description: >-
      The maximum time duration a function can run, in seconds. After which
      Function Compute terminates the execution. Defaults to 3 seconds, and can
      be between 1 to 600 seconds.
    MinValue: 1
    MaxValue: 600
    Default: 3
  Handler:
    Type: String
    Description: The function execution entry point.
  CustomContainerConfig:
    Type: Json
    Description: >-
      Custom container runtime related configuration. After configuration, the
      function can be replaced with a custom container to execute the function
  Code:
    Type: Json
    Description: The code that contains the function implementation.
  AsyncConfiguration:
    Type: Json
    Description: Configuration of asynchronous function calls
  FunctionName:
    Type: String
    Description: Function name
  CAPort:
    Type: Number
    Description: >-
      Custom runtime and custom container runtime dedicated fields, which
      represent the port that the started custom http server listens to. The
      default value is 9000
    Default: 9000
  Runtime:
    Type: String
    Description: >-
      The function runtime environment. Supporting nodejs6, nodejs8, nodejs10,
      nodejs12, python2.7, python3, java8, custom, custom-container and so on
  EnvironmentVariables:
    Type: Json
    Description: >-
      The environment variable set for the function, you can get the value of
      the environment variable in the function.
  ServiceName:
    Type: String
    Description: Service name
    MinLength: 1
    MaxLength: 128
  Initializer:
    Type: String
    Description: the entry point of the initializer
  InitializationTimeout:
    Type: Number
    Description: 'the max execution time of the initializer, in second'
  InstanceConcurrency:
    Type: Number
    Description: Function instance concurrency. Value can be between 1 to 100.
    MinValue: 1
    MaxValue: 100
Resources:
  Function:
    Type: 'ALIYUN::FC::Function'
    Properties:
      MemorySize:
        Ref: MemorySize
      Description:
        Ref: Description
      Timeout:
        Ref: Timeout
      Handler:
        Ref: Handler
      CustomContainerConfig:
        Ref: CustomContainerConfig
      Code:
        Ref: Code
      AsyncConfiguration:
        Ref: AsyncConfiguration
      FunctionName:
        Ref: FunctionName
      CAPort:
        Ref: CAPort
      Runtime:
        Ref: Runtime
      EnvironmentVariables:
        Ref: EnvironmentVariables
      ServiceName:
        Ref: ServiceName
      Initializer:
        Ref: Initializer
      InitializationTimeout:
        Ref: InitializationTimeout
      InstanceConcurrency:
        Ref: InstanceConcurrency
Outputs:
  FunctionId:
    Description: The function ID
    Value:
      'Fn::GetAtt':
        - Function
        - FunctionId
  FunctionName:
    Description: The function name
    Value:
      'Fn::GetAtt':
        - Function
        - FunctionName
  ServiceName:
    Description: The service name
    Value:
      'Fn::GetAtt':
        - Function
        - ServiceName
  ARN:
    Description: 'The ARN for ALIYUN::ROS::CustomResource'
    Value:
      'Fn::GetAtt':
        - Function
        - ARN