--- title: Sentry eleventyNavigation: key: • Sentry parent: 🚨 Monitoring --- New in version 1.9.7 [Sentry](https://sentry.io/) is an application monitoring service that includes cron-style monitoring (either cloud-hosted or [self-hosted](https://develop.sentry.dev/self-hosted/)). To get started, create a [Sentry cron monitor](https://docs.sentry.io/product/crons/) in the Sentry UI. Under "Instrument your monitor," select "Sentry CLI" and copy the URL value for the displayed [`SENTRY_DSN`](https://docs.sentry.io/concepts/key-terms/dsn-explainer/) environment variable into borgmatic's Sentry `data_source_name_url` configuration option. For example: ```yaml sentry: data_source_name_url: https://5f80ec@o294220.ingest.us.sentry.io/203069 monitor_slug: mymonitor ``` The `monitor_slug` value comes from the "Monitor Slug" under "Cron Details" on the same Sentry monitor page. With this configuration, borgmatic pings Sentry whenever borgmatic starts, finishes, or fails, but only when any of the `create`, `prune`, `compact`, or `check` actions are run. You can optionally override the start/finish/fail behavior with the `states` configuration option. For instance, to only ping Sentry on failure: ```yaml sentry: data_source_name_url: https://5f80ec@o294220.ingest.us.sentry.io/203069 monitor_slug: mymonitor states: - fail ```