Graylog: Configure Slack and Mattermost notifications

This documentation is part of the Alerting guide. View the full guide here: How to send Graylog alerts by email, Slack, or Mattermost.

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To set up a Slack or Mattermost Cloud notification, you will first need an "incoming webhook" from Slack or Mattermost Cloud.

Obtain an incoming webhook URL from Slack

For Slack users, visit https://api.slack.com/apps and click Create New App. Complete the form, validate it, then select Incoming Webhooks and enable them. Click Add New Webhook to Workspace and copy the Webhook URL for use in the next steps.

Obtain an incoming webhook URL from Mattermost

If you prefer Mattermost Cloud, the open-source alternative to Slack, navigate to your Mattermost interface. From the main menu, select Integrations, then Incoming Webhooks, click Add Incoming Webhook, and complete the form. You will be given a URL in the format https://<domain>/hooks/<token> to copy for future use.

Configure the notification

Before configuring Slack and Mattermost Cloud notifications, ensure the Integrations plugin is activated in the Stackhero dashboard. To do this, choose your Graylog service, click Configure, activate the Integrations plugin, and confirm the configuration.

Once configured, proceed to your Graylog instance under Alerts, Notifications, and click Get started! or Create notification.

Assign a title and select Slack Notification in Notification type. Paste the incoming webhook URL you obtained from Slack or Mattermost into Webhook URL.

Example of a Slack/Mattermost configuration

Click the Execute Test Notification button to ensure functionality, then finalize by clicking Create.

Congratulations, your Slack/Mattermost notification is now set up and ready for action!