Monitoring Slack

About

Monitoring Slack sends Monitoring sensor status change notifications to a Slack channel via an incoming webhook.

Drop-in replacement / companion for the monitoring_mail submodule for teams that live in Slack rather than email.

Features

• Posts a notification whenever a sensor transitions between runs (for example OK → WARNING). Cached results are skipped.
• Per-severity filtering — choose which status changes are worth notifying about (OK, INFO, WARNING, CRITICAL, UNKNOWN).
• Messages are sent as Slack attachments with a color derived from the new status (good / warning / danger) and a status emoji prepended to the title for visual prominence.
• Each attachment includes the sensor label, the sensor message, the old → new status transition, the sensor value and a link back to the sensor details page in Drupal.
• Optional payload overrides for channel, bot display name and icon emoji (legacy webhooks only — modern Slack app webhooks ignore these).
• "Send test notification" button on the settings form to verify a webhook URL before saving.
• Drupal 10.6 and 11 compatible — uses OOP #[Hook] attributes on Drupal 11, with #[LegacyHook] stubs for Drupal 10.6.

Requirements

• Drupal 10.6 or 11.
• Monitoring module.
• A Slack incoming webhook URL. Create one at https://api.slack.com/messaging/webhooks.

Configuration

1. Install and enable the module.
2. Go to Configuration → System → Monitoring settings (/admin/config/system/monitoring).
3. In the Slack notifications section, paste your webhook URL and tick the severities that should trigger a notification.
4. Optionally set a channel override, bot display name and icon emoji.
5. Click Send test notification to verify the webhook works.
6. Save.

Notes

• If Monitoring's call logging is disabled (Monitoring settings → Log calls: none) no notifications are triggered, because transitions cannot be detected.
• Channel / username / icon overrides are only honored by legacy incoming webhooks. Webhooks created through a modern Slack App always post as the app and to the channel configured in Slack — leave those fields empty in that case, and configure the app's display name and icon in Slack instead.