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Mention missing metrics removal in the migration guide

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Romain 2024-08-07 09:44:03 +02:00 committed by GitHub
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docs/content/migration/v2-to-v3-details.md
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@ -555,6 +555,16 @@ One should use the `ContentType` middleware to enable the `Content-Type` header
### Observability
#### Open Connections Metric
In v3, the open connections metric has been replaced with a global one because it was erroneously at the HTTP level, and providing misleading information.
While previously produced at the entryPoint, router, and service levels, it is now replaced with a global metric.
The equivalent to `traefik_entrypoint_open_connections`, `traefik_router_open_connections` and `traefik_service_open_connections` is now `traefik_open_connections`.
#### Configuration Reload Failures Metrics
In v3, the `traefik_config_reloads_failure_total` and `traefik_config_last_reload_failure` metrics have been suppressed since they could not be implemented.
#### gRPC Metrics
In v3, the reported status code for gRPC requests is now the value of the `Grpc-Status` header.