Prerequisites for using Cloud Functions

Available in Classic and VPC

The following describes the supported environments, pricing plans, and service limits for the smooth usage of Cloud Functions.

Cloud environment specifications

Cloud Functions support the following cloud environment specifications.

Runtime specifications

The languages supported by Cloud Functions and the recommended versions for use are as follows:

Supported languages

Trigger types specifications by region

The following trigger types are supported by Cloud Functions for each Region:

Resource limitations

The following describes the limitations for Cloud Functions resources (actions, triggers, packages).

• Timeout: maximum time limit for which the action can be run. forcibly finished if the timeout is exceeded
  • Unit: ms
  • Default value: 60000 (60 seconds)
  • Range: 500 to 300000
  • Set when creating actions
• Memory: maximum memory assignable to an action container
  • Unit: MB
  • Default: 256
  • Range: 128 to 1024
  • Set when creating actions
• Logs: maximum stdout size that can be created by an action. The printed logs that exceed the maximum size are omitted and warning is added to the final line
  • Unit: MB
  • Default: 1
  • Maximum size that can be stored in Cloud Log Analytics service logs and checked from the dashboard/monitoring: 50 KB
• Concurrent: number of actions (action containers) that can be simultaneously run at a certain time for each namespace
  • Unit: number
  • Default: 100
  • If a large amount of usage is needed: elevate your inquiry to Customer Support > Contact us
• codeSize: maximum code size
  • Unit: MB
  • Fixed value: 38
  • Cannot be arbitrarily changed
• parameters: maximum size of parameters delivered to an action or trigger
  • Unit: MB
  • Fixed value: 1
  • Cannot be arbitrarily changed
• Result: maximum size of outcome returned as a result of an action
  • Unit: MB
  • Fixed value: 1
  • Cannot be arbitrarily changed
  • Maximum size that can be stored in Cloud Log Analytics service logs and checked from the dashboard/monitoring: 150 KB
• Max open files ulimit value of action container: maximum number of files that can be opened by an action container
  • Fixed value: 1024:1024
  • Cannot be arbitrarily changed
  • Delivered to --ulimit nofile=1024:1024 when the docker run command is executed. For more information, see the official Docker document
• Max process ulimit value of action container: maximum number of processes that can be created by an action container
  • Fixed value: 1024
  • Cannot be arbitrarily changed
  • Delivered to --pids-limit 1024 when the docker run command is executed. For more information, see the official Docker document.

Parameter application priority

Cloud Functions offers various parameters for running actions or triggers. These parameters are applied based on the priority rule. Therefore, if two parameters have the same keys, the parameter with a higher priority is applied. The following describes the priority rule for parameter application.

1. Runtime parameter: parameter delivered at the time of execution, including HTTP request body and query parameters called through API gateway (only applicable to web actions)
2. Trigger default parameter: parameters applied to triggers in general
3. Action default parameter: parameters applied to actions in general
4. Package default parameter: parameters applied in general to actions belonging to packages

Source code security

Cloud Functions uses the following methods to protect the security of your code.

• Isolated storage: your uploaded code is securely stored in an isolated DB
• Independent container: once raised, your request is executed in an isolated space before the result is returned. The space itself is deleted after a certain amount of time.

Usage fees

Cloud Functions is serviced on a pay-as-you-go pricing plan. For more information on the usage fees for Cloud Functions, see Portal > Services > Compute > Cloud Functions or Portal > Pricing plan.

• Portal > Services > Compute > Cloud Functions
• Portal > Pricing plan > Pricing plan by Region > Cloud Functions