Mounting an ephemeral disk in a function

If you do not have the Yandex Cloud CLI yet, install and initialize it.

The folder used by default is the one specified when creating the CLI profile. To change the default folder, use the yc config set folder-id <folder_ID> command. You can also specify a different folder for any command using --folder-name or --folder-id. If you access a resource by its name, the search will be limited to the default folder. If you access a resource by its ID, the search will be global, i.e., through all folders based on access permissions.

To mount an ephemeral disk in a function, run this command:

yc serverless function version create \
  --function-name=<function_name> \
  --runtime <runtime> \
  --entrypoint <entry_point> \
  --memory <RAM_amount> \
  --execution-timeout <execution_timeout> \
  --source-path <path_to_ZIP_archive> \
  --service-account-id <service_account_ID> \
  --mount type=ephemeral-disk,mount-point=<mount_point>,size=<disk_size>

Where:

• --function-name: Function name.
• --runtime: Runtime.
• entrypoint: Entry point in <file_name_without_extension>.<handler_name> format.
• --memory: Amount of RAM.
• --execution-timeout: Maximum function execution time before timeout.
• --source-path: ZIP archive with the function code and required dependencies.
• --service-account-id: Service account ID.
• --mount: Ephemeral disk mount settings:
  • type=ephemeral-disk: Type of the file system being mounted.
  • mount-point: Name of the mount point. The directory with the mounted disk will be accessible at /function/storage/<mount_point>.
  • size: Ephemeral disk size in GB, e.g., size=5GB.

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 mount an ephemeral disk in a function:

1. Open the Terraform configuration file and add the mounts section to the function description:

   resource "yandex_function" "ephemeral_storage_function" {
     name               = "<function_name>"
     user_hash          = "<function_hash>"
     runtime            = "<runtime>"
     entrypoint         = "<entry_point>"
     memory             = "<RAM_amount>"
     execution_timeout  = "<execution_timeout>"
     service_account_id = "<service_account_ID>"
     content {
       zip_filename = "<path_to_ZIP_archive>"
     }
   
     mounts {
       name = "<mount_point>"
       ephemeral_disk {
         size_gb = <disk_size>
       }
     }
   }
   

   Where:

   • mounts: Ephemeral disk mount settings:
     • name: Name of the mount point. The directory with the mounted disk will be accessible at /function/storage/<mount_point>.
     • size_gb: Ephemeral disk size in GB, e.g., size=5GB.

   For more information about yandex_function resource properties, see this provider guide.

2. Apply the changes:

   1. In the terminal, navigate to the configuration file directory.

   2. Make sure the configuration is correct 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 the function update and its settings using the management console or this CLI command:

yc serverless function version get <function_version_ID>

To mount an ephemeral disk in a function, use the createVersion REST API method for the Function resource or the FunctionService/CreateVersion gRPC API call.