Adding function scaling settings

To configure scaling settings, run this command:

yc serverless function set-scaling-policy \
  --id=<function_ID> \
  --tag=\$latest \
  --zone-instances-limit=1 \
  --zone-requests-limit=2 \
  --provisioned-instances-count=3

Where:

• --id: Function ID. To find out the ID, get the list of functions.
• --tag: Function version tag.
• --zone-instances-limit: Number of function instances.
• --zone-requests-limit: Number of calls in progress.
• --provisioned-instances-count: Number of provisioned instances.

Result:

function_id: d4eokpuol55h********
tag: $latest
zone_instances_limit: "1"
zone_requests_limit: "2"
provisioned_instances_count: "3"

With Terraform, you can quickly create a cloud infrastructure in Yandex Cloud and manage it using configuration files. These files store the infrastructure description written in HashiCorp Configuration Language (HCL). If you change the configuration files, Terraform automatically detects which part of your configuration is already deployed, and what should be added or removed.

Terraform is distributed under the Business Source License. The Yandex Cloud provider for Terraform is distributed under the MPL-2.0 license.

For more information about the provider resources, see the relevant documentation on the Terraform website or its mirror.

If you do not have Terraform yet, install it and configure the Yandex Cloud provider.

To add scaling settings:

1. In the configuration file, describe the resources you want to create:

   • yandex_function: Description of the function being created and its source code.
     • name: Function name.
     • user_hash: Any string to identify the function version. When you change the function, update this string as well. Updating this string triggers a function update.
     • runtime: Function runtime.
     • entrypoint: Entry point in <file_name_without_extension>.<handler_name> format.
     • memory: Amount of memory allocated to the function, in MB.
     • execution_timeout: Maximum function execution time before timeout.
     • service_account_id: ID of the service account you want to use to invoke the function.
     • content: Function source code.
       • content.0.zip_filename: Name of the ZIP archive containing the function source code.
   • yandex_function_scaling_policy: Description of function scaling settings.
     • function_id: Function ID.
     • policy: Scaling settings:
       • policy.0.tag: Function version tag.
       • policy.0.zone_instances_limit: Number of function instances.
       • policy.0.zone_requests_limit: Number of calls in progress.

   Here is an example of the configuration file structure:

   provider "yandex" {
       token     = "<service_account_OAuth_token_or_static_key>"
       folder_id = "<folder_ID>"
       zone      = "ru-central1-a"
   }
   
   resource "yandex_function" "test-function" {
       name               = "<function_name>"
       user_hash          = "<hash>"
       runtime            = "<runtime>"
       entrypoint         = "<entry_point>"
       memory             = "128"
       execution_timeout  = "10"
       service_account_id = "<service_account_ID>"
       content {
           zip_filename = "<path_to_ZIP_archive>"
       }
   }
   
   resource "yandex_function_scaling_policy" "my_scaling_policy" {
       function_id = "<function_ID>"
       policy {
           tag = "$latest"
           zone_instances_limit = 2
           zone_requests_limit  = 1
       }
   }
   

   For more information about resource properties, see yandex_function_scaling_policy.

2. Validate your configuration using this command:

   terraform validate
   

   If the configuration is valid, you will get this message:

   Success! The configuration is valid.
   

3. Run this command:

   terraform plan
   

   You will see a list of resources and their properties. No changes will be made at this step. Terraform will show any errors in the configuration.

4. Apply the configuration changes:

   terraform apply
   

5. Type yes and press Enter to confirm the changes.

You can check that the scaling settings are added using the management console or this CLI command:

yc serverless function list-scaling-policies <function_name_or_ID>

To set scaling settings, use the setScalingPolicy REST API method for the Function resource or the FunctionService/SetScalingPolicy gRPC API call.