CreateFunction - Function Compute - Alibaba Cloud Documentation Center

Creates a function.

Debugging

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Debug

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
fc:CreateFunction	create	All Resources *	none	none

Request syntax

POST /2021-04-06/services/{serviceName}/functions HTTP/1.1

Request parameters

Parameter	Type	Required	Description	Example
serviceName	string	Yes	The name of the service.	serviceName
X-Fc-Account-Id	string	No	The ID of your Alibaba Cloud account.	188077086902****
function	object	No	The definition of the function.
code	Code	No	The ZIP package of function code. Set the value to code or customContainerConfig.
customContainerConfig	CustomContainerConfig	No	The configurations of the Custom Container runtime. After you configure the Custom Container runtime, Function Compute can run the function by using a custom container image. Set the value to code or customContainerConfig.
layers	array	No	An array that consists of the information of layers. Note If multiple layers exist, the layers are merged based on the array subscripts in descending order. The content of a layer with a smaller subscript overwrites that of a larger subscript.
	string	No	The name of the layer. The format is acs:fc:{region}:{accountID}:layers/{layerName}/versions/{layerVersion}.	layerName
description	string	No	The description of the function.	function-description
functionName	string	Yes	The name of the function. It can contain letters, digits, underscores (_), and hyphens (-). It cannot start with a digit or hyphen (-). It must be 1 to 64 characters in length.	functionName
handler	string	Yes	The handler of the function. The format varies based on the programming language. For more information, see Function handlers.	index.handler
initializationTimeout	integer	No	The timeout period for the Initializer hook. Default value: 3. Unit: seconds. The value of this parameter ranges from 1 to 300. When this period expires, the execution of the Initializer hook is terminated.	60
initializer	string	No	The entry of the Initializer hook. For more information, see Initializer hooks.	index.initializer
memorySize	integer	No	The memory capacity for the function. Unit: MB. The memory capacity must be a multiple of 64 MB. The memory size varies based on the function instance type. For more information, see the "Instance specifications" section of the Instance types and usage modes topic.	512
runtime	string	Yes	The runtime of the function. Valid values: nodejs20, nodejs18, nodejs20, nodejs18, nodejs16, nodejs14, nodejs12, nodejs10, nodejs8, nodejs6, nodejs4.4, python3.10, python3.9, python3, python2.7, java11, java8, go1, php7.2, dotnetcore3.1, dotnetcore2.1, custom.debian10, custom, and custom-container. For more information, see Runtimes that are supported by Function Compute.	python3.9
timeout	integer	No	The timeout period for function execution. Unit: seconds. Minimum value: 1. Default value: 3. When this period elapses, the function execution is terminated.	60
caPort	integer	No	The port on which the HTTP server listens for the custom runtime or Custom Container runtime.	9000
environmentVariables	object	No	The environment variables that you configured for the function. You can obtain the values of the environment variables from the function. For more information, see Environment variables.
	string	No	The configurations of environment variables.	{"key":"value"}
instanceConcurrency	integer	No	The number of requests that can be concurrently processed by a single instance.	10
instanceSoftConcurrency	integer	No	The soft concurrency of the instance. You can use this property to implement graceful scale-ups for instances. If the number of concurrent requests on an instance is greater than the value of soft concurrency, an instance scale out is triggered. For example, if your instance requires a long time to start, you can specify a proper soft concurrency to start the instance in advance. The value must be less than or equal to that of instanceConcurrency.	5
instanceType	string	No	The instance type of the function. Valid values: e1: elastic instances c1: performance instances fc.gpu.tesla.1: GPU-accelerated instances (Tesla T4) fc.gpu.ampere.1: GPU-accelerated instances (Ampere A10) g1: same as fc.gpu.tesla.1 Default value: e1	e1
customRuntimeConfig	CustomRuntimeConfig	No	The configurations of the function that runs in the custom runtime.
instanceLifecycleConfig	InstanceLifecycleConfig	No	The lifecycle configurations of instances.
customDNS	CustomDNS	No	The custom Domain Name System (DNS) settings of the function.
customHealthCheckConfig	CustomHealthCheckConfig	No	The custom health check configurations of the function. This parameter is applicable only to custom runtimes and Custom Container runtimes.
cpu	float	No	The CPU size of the function. Unit: vCPUs. The value is a multiple of 0.05 vCPUs.	1.5
diskSize	integer	No	The disk size of the function. Unit: MB. Valid values: 512 MB and 10240 MB.	512
gpuMemorySize	integer	No	The GPU memory size of the function. Unit: MB, which is a multiple of 1024 MB.	2048
X-Fc-Code-Checksum	string	No	The CRC-64 value of the function code package.	1506052139770049xxxx
X-Fc-Date	string	No	The time on which the function is invoked. The format of the value is: EEE,d MMM yyyy HH:mm:ss GMT.	Wed, 11 May 2022 09:00:00 GMT
X-Fc-Trace-Id	string	No	The trace ID of the request. The value is the same as that of the requestId parameter in the response.	test-trace-id

Response parameters

Parameter	Type	Description	Example
headers	object
ETag	string	The ETag that is used to modify the function. The value is used to ensure that the modified function is consistent with the function that is expected to be modified.	738136ea26b79cee660862cd7628****
	object	The returned data.
codeChecksum	string	The CRC-64 value of the function code package.	5434025278388143772
codeSize	long	The size of the function code package that is returned by the system. Unit: bytes.	1024
createdTime	string	The time when the function was created.	2016-08-15T15:00:00.000+0000
customContainerConfig	CustomContainerConfig	The configurations of the custom container runtime. After you configure the custom container runtime, Function Compute can execute the function in a container created from a custom image.
layers	array	An array that consists of the information of layers. Note If multiple layers exist, the layers are merged based on the array subscripts in descending order. The content of a layer with a smaller subscript overwrites that of a larger subscript.
layer	string	The name of the layer.	md5#layername#version
description	string	The description of the function.	This is a demo hello world function
functionId	string	The unique ID that is generated by the system for the function.	2d28e0e9-9ba5-4eed-8b1a-d3d9cd24 ****
functionName	string	The name of the function.	demo-function
handler	string	The handler of the function.	index.handler
lastModifiedTime	string	The time when the function was last modified.	2016-08-15T17:00:00.000+0000
memorySize	integer	The memory size that is configured for the function. Unit: MB.	512
runtime	string	The runtime of the function. Valid values: nodejs20, nodejs18, nodejs20, nodejs18, nodejs16, nodejs14, nodejs12, nodejs10, nodejs8, nodejs6, nodejs4.4, python3.10, python3.9, python3, python2.7, java11, java8, go1, php7.2, dotnetcore3.1, dotnetcore2.1, custom.debian10, custom, and custom-container. For more information, see Runtimes that are supported by Function Compute.	python3.9
timeout	integer	The timeout period for the execution of the function. Unit: seconds. Default value: 60. Valid values: 1 to 600. When this period expires, the execution of the function is terminated.	10
initializationTimeout	integer	The timeout period for the execution of the Initializer hook. Unit: seconds. Default value: 3. Minimum value: 1. When the period ends, the execution of the Initializer hook is terminated.	60
initializer	string	The handler of the Initializer hook. The format is determined by the programming language.	index.handler
caPort	integer	The port on which the HTTP server listens for the custom runtime or custom container runtime.	9000
environmentVariables	object	The environment variables that are configured for the function. You can obtain the values of the environment variables from the function. For more information, see Environment variables.
	string	The environment variables that you configured for the function.	{"key":"value"}
instanceConcurrency	integer	The number of requests that can be concurrently processed by a single instance.	10
instanceSoftConcurrency	integer	The soft concurrency of the instance. You can use this parameter to implement graceful scale-up of instances. If the number of concurrent requests on an instance is greater than the value of soft concurrency, an instance scale-up is triggered. For example, if your instance requires a long time to start, you can specify a suitable soft concurrency to start the instance in advance. The value must be less than or equal to that of the instanceConcurrency parameter.	5
instanceType	string	The instance type of the function. Valid values: e1: elastic instances c1: performance instances fc.gpu.tesla.1: GPU-accelerated instances with Tesla series cards fc.gpu.ampere.1: GPU-accelerated instances with Ampere series cards fc.gpu.ada.1: GPU-accelerated instances with Ada series cards g1: same as fc.gpu.tesla.1	e1
instanceLifecycleConfig	InstanceLifecycleConfig	The lifecycle configurations of the instance.
customDNS	CustomDNS	The custom DNS configurations of the function.
customRuntimeConfig	CustomRuntimeConfig	The configurations of the custom runtime.
customHealthCheckConfig	CustomHealthCheckConfig	The custom health check configuration of the function. This parameter is applicable only to custom runtimes and custom containers.
cpu	float	The number of vCPUs of the function. The value is a multiple of 0.05.	1.5
diskSize	integer	The disk size of the function. Unit: MB. Valid values: 512 and 10240.	512
gpuMemorySize	integer	The GPU memory capacity for the function. Unit: MB. The value is a multiple of 1,024.	2048
layersArnV2	array	ARN list of layers
layer	string	The layer resource locator.	acs:fc:cn-hangzhou:official:layers/Python310/versions/2

Examples

Sample success responses

JSONformat

{
  "codeChecksum": "5434025278388143772",
  "codeSize": 1024,
  "createdTime": "2016-08-15T15:00:00.000+0000",
  "customContainerConfig": {
    "args": "[\"-arg1\", \"value1\"]",
    "command": "[\"/code/myserver\"]",
    "image": "registry-vpc.cn-hangzhou.aliyuncs.com/fc-demo/helloworld:v1beta1",
    "accelerationType": "Default",
    "instanceID": "cri-xxxxxxxxxx",
    "webServerMode": true
  },
  "layers": [
    "md5#layername#version"
  ],
  "description": "This is a demo hello world function",
  "functionId": "2d28e0e9-9ba5-4eed-8b1a-d3d9cd24\n****",
  "functionName": "demo-function",
  "handler": "index.handler",
  "lastModifiedTime": "2016-08-15T17:00:00.000+0000",
  "memorySize": 512,
  "runtime": "python3.9",
  "timeout": 10,
  "initializationTimeout": 60,
  "initializer": "index.handler",
  "caPort": 9000,
  "environmentVariables": {
    "key": "{\"key\":\"value\"}"
  },
  "instanceConcurrency": 10,
  "instanceSoftConcurrency": 5,
  "instanceType": "e1",
  "instanceLifecycleConfig": {
    "preFreeze": {
      "handler": "",
      "timeout": 0
    },
    "preStop": {
      "handler": "",
      "timeout": 0
    }
  },
  "customDNS": {
    "nameServers": [
      "8.8.8.8"
    ],
    "searches": [
      "ns1.svc.cluster-domain.example"
    ],
    "dnsOptions": [
      {
        "name": "ndots",
        "value": "2"
      }
    ]
  },
  "customRuntimeConfig": {
    "command": [
      "/code/myBootstrap"
    ],
    "args": [
      "args1"
    ]
  },
  "customHealthCheckConfig": {
    "httpGetUrl": "",
    "initialDelaySeconds": 0,
    "periodSeconds": 0,
    "timeoutSeconds": 0,
    "failureThreshold": 0,
    "successThreshold": 0
  },
  "cpu": 1.5,
  "diskSize": 512,
  "gpuMemorySize": 2048,
  "layersArnV2": [
    "acs:fc:cn-hangzhou:official:layers/Python310/versions/2"
  ]
}

Error codes

For a list of error codes, visit the Service error codes.

Change history

Change time	Summary of changes	Operation
2023-07-27	The response structure of the API has changed	View Change Details
2023-07-27	The response structure of the API has changed	View Change Details
2023-06-29	The response structure of the API has changed	View Change Details
2021-06-29	The internal configuration of the API is changed, but the call is not affected	View Change Details
2021-06-29	The request parameters of the API has changed	View Change Details
2021-06-29	The request parameters of the API has changed. The response structure of the API has changed	View Change Details
2021-06-29	The request parameters of the API has changed. The response structure of the API has changed	View Change Details