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Slack Webhook triggers

Trigger Pipelines Using Slack Events

You can trigger pipelines in response to Slack messages or events that match specific payload conditions you set up in a Harness trigger. For example, when a specific message is posted in a Slack channel or a particular event occurs, and your trigger settings match the payload conditions, a CI or CD pipeline can run.

Triggers enable event-driven CI/CD and support practices like building and/or deploying with every relevant Slack interaction.

note

Currently this feature is behing the Feature Flag CDS_EVENT_BRIDGE_WEBHOOK. Please contact Harness Support to enable this feature.

Add a trigger to a pipeline​

First, let’s configure a Slack webhook to create a trigger.

Configure a webhook​

Steps to Create a Slack Webhook

  1. Go to Account/Project settings and click on Webhook under Resources.
  2. Click on New Webhook.
  3. Enter a Name for the webhook.
  4. Select the type of the webhook. In this case, Slack.
  5. For Auth type, we have two options No Auth if you have authentication to your source. no additional configuration is reqired. HMAC for Hash-Based Message Authentication Code authentication

Now, click on Add to save webhook.

The webhook is now created, click on the webhook you created earlier and copy the Webhook URL provided.

Configure a trigger​

To link this webhook to trigger your pipeline, navigate to the pipeline for which this webhook will be used.

  1. Select Triggers in the top right corner of the page.
  2. Click on New Trigger and select Event Relay.

  1. On the configurations page, provide a Name for the webhook.
  2. Under Listen on New Webhook, Event Relay is selected by default for Payload Type. When selecting Webhooks, a pop-up page will display all the configured Generic and Slack webhooks.

Select the Slack webhook you created earlier.

Click on Continue.

  1. In the Conditions page, give the approproate Header Conditions and Payload Conditions. Click on Continue.

  2. In the Pipeline Input page, you can provide any Pipeline input variables as per your requirement. Click on Create Trigger

Configure Slack with the Webhook​

This section explains how to configure Slack with your webhook to enable real-time notifications. Follow these steps to integrate the webhook and set it up for bot events in your chosen channel

  1. Navigate to your Slack account.
  2. Under Settings, go to Event Subscriptions.
  3. Turn on Enable Events
  4. In the Webhook URL field, paste the webhook URL you configured earlier. The URL will be auto-verified to ensure it's valid.
  5. After the URL is verified, configure the webhook under the Subscribe to Bot Events section.
  6. Add the desired channel.

Now that Slack is configured, any relevant Slack event in the configured channel will trigger the pipeline.