@Marvin I would like to use a webhook listener to trigger a specific deployment. What key or keys of the automation trigger should I specify to limit the automation to the specific webhook and what should the format of the value assigned to those keys?

To use a webhook listener to trigger a specific deployment in Prefect 2.x, you need to create an automation that matches events to that webhook. You can specify a trigger in your deployment that will configure an automation to run the deployment based on the presence of certain events. When configuring the trigger for a webhook, you can include matching criteria that check for specific keys in the event data. For example, the

match

key can be used to identify event types, such as

prefect.resource.id: prefect.flow-run.*

, and

match_related

keys to correlate with certain resource names or roles. You can also pass event data into the deployment run as parameters using Jinja templating. To limit the automation to a specific webhook, you would generally use the event data sent by the webhook to include or look for specific identifiers that are unique to that webhook. For example, if your webhook sends a POST request with a payload containing certain fields, such as

model

and

friendly_name

, you can configure your automation to match these fields and only trigger the deployment when the specified model is updated. It's important to note that deployment triggers and automations are available in Prefect Cloud, ensuring you have the necessary integration in place to use them. Here’s an hypothetical example configuration for a webhook-based trigger in automation (please adjust the keys and values to fit your actual event data):

yaml
triggers:
  - enabled: true
    match:
      my_event_key.model: "specific_model_id"
      my_event_key.friendly_name: "Specific_Model_Friendly_Name"
    parameters:
      param_1: "{{ event.my_event_key.some_parameter }}"

In this example configuration,

my_event_key.model

and

my_event_key.friendly_name

are placeholders for the actual keys you expect in your webhook event data. The value of

param_1

is set dynamically based on the event data received. This is configured using Jinja templating, where

{{ event.my_event_key.some_parameter }}

extracts a value from the webhook's payload. When setting up triggers and automations, ensure that the keys and the format of the values you specify correspond to the actual structure of the webhook event data you are receiving. For more detailed and specific guidance based on your webhook's implementation and the events it sends, you might want to refer to Prefect's webhooks guide and consider the structure of your webhook payload when configuring triggers in your deployment YAML or through the UI.

@Marvin The system sending the webhook only sends GET requests. Therefore, I need to specify the ID of the webhook in the automation trigger. What is the syntax?

To specify the ID of a webhook in an automation trigger within Prefect, when the system sending the webhook uses GET requests, involves the use of the webhook's unique identifier within your Prefect Cloud account. The documentation does not provide a direct snippet detailing the exact syntax for using a webhook ID in an automation trigger. Automation triggers that respond to webhook events are typically configured to respond to various event data payload. However, the general approach for defining a webhook trigger would be within the automation configuration, where you can specify a condition to match against the unique ID of the webhook. This will typically involve using the Prefect Cloud CLI or the Prefect UI to handle webhook configurations. Although the syntax for specifying the webhook ID in the trigger condition is not provided, you may configure your automation through the UI or use the Prefect Cloud CLI to fetch information about your webhooks using the following commands: - To get a specific webhook by its ID:

prefect cloud webhook get <webhook-id>

- To list all configured webhooks in your workspace:

prefect cloud webhook ls

These commands are useful for retrieving the necessary identifiers that you would then reference within your automation configuration. If you're looking to specify the webhook ID in an automated trigger, you will likely need to work with the webhook configuration where you can relate the webhook ID with the trigger logic. This could be part of a larger JSON or YAML configuration file or set up through the Prefect Cloud UI. For a more accurate and detailed answer, including exact syntax for specifying the webhook ID in an automation trigger, it would be advisable to consult the Prefect documentation specific to automations or reach out to Prefect's support for guidance on configuring triggers that are not well-documented or may require access to Prefect Cloud's specific features.

@Marvin This syntax is working for the automation trigger but it responds to any webhook called. I think I need to specify a specific webhook ID to listen for but the syntax for the value of match_related is unclear:

{
  "match": {
    "prefect.resource.id": "webhook.resource.id"
  },
  "match_related": {},
  "after": [],
  "expect": [
    "webhook.called"
  ],
  "for_each": [],
  "posture": "Reactive",
  "threshold": 1,
  "within": 0
}

To specify a specific webhook ID in the automation trigger in Prefect, you would need to include the exact ID of the webhook in the

match

or

match_related

configuration. However, the provided excerpts do not contain detailed information on the syntax for doing so. Based on the structure you’ve provided and common practices in defining configuration in JSON, if you know the ID of your webhook, you would likely include it in the

match

configuration to ensure that only events from that webhook trigger the automation. Here is an example of how you might specify a webhook ID in an automation trigger:

json
{
  "match": {
    "webhook.id": "<YOUR-WEBHOOK-ID>"
  },
  "match_related": {},
  "after": [],
  "expect": [
    "webhook.called"
  ],
  "for_each": [],
  "posture": "Reactive",
  "threshold": 1,
  "within": 0
}

In this case, you would replace

<YOUR-WEBHOOK-ID>

with the actual ID of your webhook, thus creating a trigger that only responds when that specific webhook is called. Since the exact syntax and parameters for

match_related

or other keys are not clear from the documentation excerpts we have, and to make sure you implement this correctly, you would likely need to refer to more comprehensive Prefect documentation, examples, or directly consult with their support team for guidance on how to set this up. Prefect's documentation suggests using the following command to get information about a specific webhook by ID, which may help you:

prefect cloud webhook get <webhook-id>

Retrieving the webhook details may provide additional context or metadata that could be useful in crafting your automation trigger to listen for a specific webhook ID. It’s also recommended to check the Prefect Cloud UI for possible hints on how to structure these configurations.