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diff --git a/docs/upgrade.md b/docs/upgrade.md index c4db19e23d..002ef70059 100644 --- a/docs/upgrade.md +++ b/docs/upgrade.md @@ -100,6 +100,34 @@ vice versa. Once all workers are upgraded to v1.69 (or downgraded to v1.68), receipts replication will resume as normal. + +## Deprecation of legacy Prometheus metric names + +In current versions of Synapse, some Prometheus metrics are emitted under two different names, +with one of the names being older but non-compliant with OpenMetrics and Prometheus conventions +and one of the names being newer but compliant. + +Synapse v1.71.0 will turn the old metric names off *by default*. +For administrators that still rely on them and have not had chance to update their +uses of the metrics, it's possible to specify `enable_legacy_metrics: true` in +the configuration to re-enable them temporarily. + +Synapse v1.73.0 will **remove legacy metric names altogether** and it will no longer +be possible to re-enable them. + +The Grafana dashboard, Prometheus recording rules and Prometheus Consoles included +in the `contrib` directory in the Synapse repository have been updated to no longer +rely on the legacy names. These can be used on a current version of Synapse +because current versions of Synapse emit both old and new names. + +You may need to update your alerting rules or any other rules that depend on +the names of Prometheus metrics. +If you want to test your changes before legacy names are disabled by default, +you may specify `enable_legacy_metrics: false` in your homeserver configuration. + +A list of affected metrics is available on the [Metrics How-to page](https://matrix-org.github.io/synapse/v1.69/metrics-howto.html?highlight=metrics%20deprecated#renaming-of-metrics--deprecation-of-old-names-in-12). + + # Upgrading to v1.68.0 Two changes announced in the upgrade notes for v1.67.0 have now landed in v1.68.0. |