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Yandex Cloud Functions

Creating a trigger for Container Registry that invokes a Cloud Functions function

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Create a trigger for Container Registry to call a Cloud Functions function when you create or delete Container Registry Docker images or Docker image tags.

Before you begin

To create a trigger, you need:

  • A function that the trigger will invoke. If you don't have a function:

  • (optional) A Dead Letter Queue where messages that could not be processed by a function will be redirected. If you don't have a queue, create one.

  • Service accounts with rights to invoke the function and (optionally) write messages to the Dead Letter Queue. You can use the same service account or different ones. If you don't have a service account, create one.

  • Registry whose Docker image events will fire the trigger. If you don't have a registry, create one.

Creating a trigger

Note

The trigger is initiated within 5 minutes of being created.

  1. In the management console, select the folder where you wish to create your trigger.

  2. Select Cloud Functions.

  3. On the left-hand panel, select Triggers.

  4. Click Create trigger.

  5. Under Basic parameters:

    • Enter a name and description for the trigger.
    • In the Type field, select Container Registry.
    • In the Launched resource field, select Function.

  6. Under Container Registry settings:

    • In the Registry field, select the registry where you want to create a trigger for image events.
    • In the Event types field, select the events that will fire the trigger.
    • (optional) In the Docker image name field, enter an image name to filter for. To get the name of a Docker image, retrieve a list of Docker images in the registry.
    • (optional) In the Docker image tag field, enter the image tag for filtering.

  7. Under Function settings, select a function and specify:

  8. (optional) Under Repeat request settings:

    • In the Interval field, specify the time after which the function will be invoked again if the current attempt fails. Values can be from 10 to 60 seconds. The default is 10 seconds.
    • In the Number of attempts field, specify the number of invocation retries before the trigger moves a message to the Dead Letter Queue. Values can be from 1 to 5. The default is 1.

  9. (optional) Under Dead Letter Queue settings, select the Dead Letter Queue and the service account with write privileges for this queue.

  10. Click Create trigger.

If you don't have the Yandex Cloud command line interface yet, install and initialize it.

The folder specified in the CLI profile is used by default. You can specify a different folder using the --folder-name or --folder-id parameter.

To create a trigger that invokes a function, run the command:

yc serverless trigger create container-registry \
  --name <trigger name> \
  --registry-id <registry ID> \
  --events 'create-image', 'delete-image', 'create-image-tag', 'delete-image-tag' \
  --invoke-function-id <function ID> \
  --invoke-function-service-account-id <service account ID> \
  --retry-attempts 1 \
  --retry-interval 10s \
  --dlq-queue-id <Dead Letter Queue ID> \
  --dlq-service-account-id <service account ID>

Where:

  • --name: Trigger name.
  • --registry-id: Registry ID.
  • --events: Events after which the trigger activates.
  • --invoke-function-id: Function ID.
  • --invoke-function-service-account-id: Service account with rights to invoke the function.
  • --retry-attempts: The time after which the function will be invoked again if the current attempt fails. Optional. Values can be from 10 to 60 seconds. The default is 10 seconds.
  • --retry-interval: The number of invocation retries before the trigger moves a message to the Dead Letter Queue. Optional. Values can be from 1 to 5. The default is 1.
  • --dlq-queue-id: Dead Letter Queue ID. Optional.
  • --dlq-service-account-id: Service account with rights to write messages to the Dead Letter Queue. Optional.

Result:

id: a1s92agr8m**********
folder_id: b1g88tflru**********
created_at: "2020-09-08T06:26:22.651656Z"
name: registry-trigger
rule:
  container_registry:
    event_type:
    - CONTAINER_REGISTRY_EVENT_TYPE_CREATE_IMAGE
    - CONTAINER_REGISTRY_EVENT_TYPE_DELETE_IMAGE
    - CONTAINER_REGISTRY_EVENT_TYPE_CREATE_IMAGE_TAG
    - CONTAINER_REGISTRY_EVENT_TYPE_DELETE_IMAGE_TAG
    registry_id: crtlds4tdfg12kil77**********
    invoke_function:
      function_id: d4eofc7n0m**********
      function_tag: $latest
      service_account_id: aje3932acd**********
      retry_settings:
        retry_attempts: "1"
        interval: 10s
      dead_letter_queue:
        queue-id: yrn:yc:ymq:ru-central1:aoek49ghmk**********:dlq
        service-account-id: aje3932acd**********
status: ACTIVE

You can create a trigger for Container Registry using the create.

Checking the result

Make sure the trigger is working properly. To do this, view function logs: they show information about calls.

See also

In this article: