A function is a scheduling and operational unit in Function Compute. A function must belong to a service. All functions in a service share some settings, such as service authorization and log configuration.
Function parameters
When you create a function, you must specify the parameters described in the following
table.
| Parameter | Required | Description |
|---|---|---|
| FunctionName | Yes | The name of the function. The name must be unique within the corresponding service
and meet the following requirements:
|
| Runtime | Yes | The runtime environment of the function. |
| Code | Yes | The code package for the function. If you are using Java, you must upload a JAR package. If you are using other languages, you must upload a ZIP package. The package can be stored in Object Storage Service (OSS) or directly uploaded. |
| Handler | Yes | The handler used by the Function Compute system to invoke your function. |
| Description | No | The description of the function. The Function Compute system does not use the value of this parameter. However, we recommend that you set a simple and clear description for your service. |
| Timeout | No | The maximum execution time for the function. Unit: seconds. |
| InstanceType | No | The type of the function instance. Valid values:
|
| MemorySize | No | The memory that is required to execute the function. Unit: MB. Value range: 128 to 3072. The value increases at a step size of 64 MB. |
| Initializer | No | The handler used by Function Compute to invoke your initializer function. |
| InitializationTimeout | No | The maximum execution time for the initializer function. Unit: seconds. |
You can modify all parameters later except FunctionName.
Supported runtime environments
| Runtime environment | Description | Reference |
|---|---|---|
| nodejs6 | Node.js 6.10.3 | Node.js runtime environment |
| nodejs8 | Node.js 8.9.0 | |
| nodejs10 | Node.js 10.15.3 | |
| nodejs12 | Node.js 12.16.1 | |
| python2.7 | Python 2.7 | Python runtime environment |
| python3 | Python 3.6 | |
| php7.2 | PHP 7.2.7 | PHP runtime |
| java8 | Java 8 | Java runtime |
| dotnetcore2.1 | .NET Core 2.1 | .NET Core runtime |
| custom | None | Custom Runtime |
| custom-container | None | Custom Container |