Pulumi Cloud webhooks

Pulumi Webhooks allow you to notify external services of events happening within your Pulumi organization. For example, you can trigger a notification whenever a stack is updated. Whenever an event occurs, Pulumi will send an HTTP POST request to all registered webhooks. The webhook can then be used to emit a notification, start running integration tests, or even update additional stacks.

Webhooks can be used for pretty much anything you want, and are the foundation of most ChatOps workflows.

Overview

Webhooks can be attached to either a stack or an organization. Stack webhooks will be notified of events specific to the stack. Organization webhooks will be notified for events happening within each of the organization’s stacks.

The Webhooks page is under the Stack or Organization Settings tab.

Create a Webhook

Pulumi Webhooks may be created through the UI using the steps outlined below, by using the Webhook resource from the Pulumi provider or by using the API directly.

import * as pulumi from "@pulumi/pulumi";
import * as pulumiservice from "@pulumi/pulumiservice";
const webhook = new pulumiservice.Webhook("example-webhook", {
    active: true,
    displayName: "webhook example",
    organizationName: "example",
    payloadUrl: "https://example.com/webhook",
});

import pulumi
import pulumi_service
webhook = pulumi_service.Webhook("example-webhook",
    active: True,
    display_name: "webhook example",
    organization_name: "example",
    payload_url: "https://example.com/webhook",
)

import (
	"fmt"
	"github.com/pulumi/pulumi-pulumiservice/sdk/go/pulumiservice"
	"github.com/pulumi/pulumi/sdk/v3/go/pulumi"
)
func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		webhook, err := pulumiservice.NewWebhook(ctx, "example-webhook", &pulumiservice.WebhookArgs{
			Active:           pulumi.Bool(true),
			DisplayName:      pulumi.String("example webhook"),
			OrganizationName: pulumi.String("example"),
			PayloadURL:       pulumi.String("https://example.com/webhook"),
		}, nil)
		if err != nil {
			return fmt.Errorf("error creating webhook: %v", err)
		}
		return nil
	})
}

using Pulumi;
using Pulumi.PulumiService;
class PulumiServiceWebhook: Stack
{
    public PulumiServiceWebhook()
    {
        var webhook = new Webhook("example-webhook", new WebhookArgs{
            Active = true,
            DisplayName = "example webhook",
            OrganizationName = "example",
            PayloadUrl = "https://example.com/webhook"
        })
    }
}

Create an Organization Webhook

1. Navigate to Settings > Webhooks.
2. Select Create webhook.
3. Under Destination, choose Webhook, Slack, Microsoft Teams."
   1. For generic JSON webhooks, provide a display name, payload URL, and optionally a secret.
   2. For Slack webhooks, provide a Slack webhook URL and a display name.
   3. For Microsoft Teams webhooks, provide a Microsoft Teams webhook URL and a display name.
4. Choose between receiving all events or only receiving specific events using the filters menu.

Create a Stack Webhook

1. Navigate to the stack.
2. Navigate to Settings > Webhooks
3. Select Create webhook.
4. Under Destination, choose Webhook, Slack, Microsoft Teams, or Deployment."
   1. For generic JSON webhooks, provide a display name, payload URL, and optionally a secret.
   2. For Slack webhooks, provide a Slack webhook URL and a display name.
   3. For Microsoft Teams webhooks, provide a Microsoft Teams webhook URL and a display name.
   4. For Deployment webhooks, provide the stack to deploy in the format project/stack.
5. Choose between receiving all events or only specific events using the filters menu.

Event Filtering

Event filtering allows you to choose which events should be delivered to each webhook. You may choose to receive all events, or filter to specific events (only failures, only deployment events, etc.). The following table describes the various event filters available and the context in which they are relevant.

Webhook Formats

When creating a webhook, you can choose between the generic JSON webhook payload or slack formatted events.

Slack Webhooks

Slack Webhooks allow you to seamlessly integrate notifications about your Pulumi stacks and organizations into your Slack workspace by simply providing a Slack incoming webhook URL and optionally choosing which events you want delivered using event filters.

You can either create your own Slack app (or use an existing one you may already have installed in your workspace), or follow the link below to quickly get started with a pre-defined Slack app manifest.

Microsoft Teams Webhooks

Microsoft Teams Webhooks allow you to seamlessly integrate notifications about your Pulumi stacks and organizations into your Microsoft Teams workspace by simply providing a Microsoft Teams incoming webhook URL and optionally choosing which events you want delivered using event filters.

Deployment Webhooks

The Deployment webhook destination lets you trigger updates on other stacks via Pulumi Deployments, usually in response to update_succeeded events. This enables you to keep dependent stacks up to date automatically which is often necessary when using stack references.

Deployment webhooks require that your stacks are configured with Deployment Settings.

Generic JSON Webhooks

When using generic JSON webhooks, Pulumi will send an HTTP POST request to all registered webhooks. The webhook can then be used to emit a notification, start running integration tests, or even update additional stacks.

Payload Examples

Each webhook payload has a format specific to the payload being emitted. Every payload will contain a sender, organization, and stack reference as appropriate. For examples of specific payloads, see Payload Reference below.

Each webhook will contain a user field, which is the user who requested the action, an organization which is the organization name, and a URL for the event. It will also contain the stackName for the stack which was modified when applicable.

Stack Creation

{
	"user": {
		"name": "Morty Smith",
		"githubLogin": "morty",
		"avatarUrl": "https://crazy-adventures.net/morty.png"
	},
	"organization": {
		"name": "Crazy Adventures",
		"githubLogin": "crazy-adventures",
		"avatarUrl": "https://crazy-adventures.net/logo.png"
	},
	"action": "created",
	"projectName": "website",
	"stackName": "website-prod"
}

Stack Update

{
	"user": {
		"name": "Morty Smith",
		"githubLogin": "morty",
		"avatarUrl": "https://crazy-adventures.net/morty.png"
	},
	"organization": {
		"name": "Crazy Adventures",
		"githubLogin": "crazy-adventures",
		"avatarUrl": "https://crazy-adventures.net/logo.png"
	},
	"projectName": "website",
	"stackName": "website-prod",
	"updateUrl": "https://app.pulumi.com/crazy-adventures/website/website-prod/updates/42",
	"kind": "refresh",
	"result": "succeeded",
	"resourceChanges": {
		"update": 3,
		"delete": 1,
		"update-replace": 2
	},
    "isPreview": false
}

Stack Preview

{
	"user": {
		"name": "Morty Smith",
		"githubLogin": "morty",
		"avatarUrl": "https://crazy-adventures.net/morty.png"
	},
	"organization": {
		"name": "Crazy Adventures",
		"githubLogin": "crazy-adventures",
		"avatarUrl": "https://crazy-adventures.net/logo.png"
	},
	"projectName": "website",
	"stackName": "website-prod",
	"updateUrl": "https://app.pulumi.com/crazy-adventures/website/website-prod/previews/11bf162b-d9d5-4715-8f88-20dcd0e0b167",
	"kind": "update",
	"result": "failed",
	"resourceChanges": {
		"update": 3,
		"delete": 1,
		"update-replace": 2
	},
    "isPreview": true
}

Deployment

{
	"user": {
		"name": "Morty Smith",
		"githubLogin": "morty",
		"avatarUrl": "https://crazy-adventures.net/morty.png"
	},
	"organization": {
		"name": "Crazy Adventures",
		"githubLogin": "crazy-adventures",
		"avatarUrl": "https://crazy-adventures.net/logo.png"
	},
	"projectName": "website",
	"stackName": "website-prod",
	"deploymentUrl": "https://app.pulumi.com/crazy-adventures/website/website-prod/deployments/127",
    "version": 127,
	"operation": "update",
	"status": "running"
}

Headers

Payloads contain several headers.

The following snippets show how to compute and verify the webhook signature. For examples in other languages, see danharper/hmac-examples.

var crypto = require('crypto');

const sharedSecret = ...
const payload = req.body.toString();

var hmacAlg = crypto.createHmac('sha256', sharedSecret);
var expectedSignature = hmac.update(payloadBody).digest('hex');

import * as crypto from "crypto";

const sharedSecret = ...
const payload = req.body.toString();

const hmacAlg = crypto.createHmac("sha256", stackConfig.sharedSecret);
const hmac = hmacAlg.update(payload).digest("hex");

const result = crypto.timingSafeEqual(Buffer.from(webhookSig), Buffer.from(hmac));

import hashlib
import hmac
import base64

message = bytes('...', 'utf-8')
secret = bytes('...', 'utf-8')

hash = hmac.new(secret, message, hashlib.sha256)
hash.hexdigest()

expected_signature = base64.b64encode(hash.digest())

func computeSignature(payload []byte, secret string) string {
	mac := hmac.New(sha256.New, []byte(secret))
	_, err := mac.Write(payload)
	contract.AssertNoErrorf(err, "computing HMAC digest")
	return fmt.Sprintf("%x", mac.Sum(nil))
}

Additional Resources

• Managing Github Webhooks with Pulumi
• Pulumi Cloud REST API