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plugin-barman-cloud/web/docs/observability.md
Gabriele Bartolini ffb4ffb7a6
docs: clarify observability metrics and migration to plugin-based ones (#621) 
Improved the "Observability" section to better describe the Prometheus
metrics exposed by the Barman Cloud Plugin via the instance manager.
Added a mapping table in the "Verify your metrics" step to show the
transition from in-core metrics (`cnpg_collector_*`) to the new
plugin-based metrics (`barman_cloud_cloudnative_pg_io_*`).

Closes #473
Closes cloudnative-pg/cloudnative-pg#8902

Signed-off-by: Gabriele Bartolini <gabriele.bartolini@enterprisedb.com>
2025-10-27 16:39:14 +01:00

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Observability

The Barman Cloud Plugin exposes the following metrics through the native Prometheus exporter of the instance manager:

  • barman_cloud_cloudnative_pg_io_last_failed_backup_timestamp: the UNIX timestamp of the most recent failed backup.

  • barman_cloud_cloudnative_pg_io_last_available_backup_timestamp: the UNIX timestamp of the most recent successfully available backup.

  • barman_cloud_cloudnative_pg_io_first_recoverability_point: the UNIX timestamp representing the earliest point in time from which the cluster can be recovered.

These metrics supersede the previously available in-core metrics that used the cnpg_collector prefix. The new metrics are exposed under the barman_cloud_cloudnative_pg_io prefix instead.