prometheus remote read handling of http redirects

[Johny]

We use a custom remote read adapter for reading time series data from our storage backend. In process of transitioning to different backend, I want to temporarily redirect selected remote read requests (filter on date) to the new remote read adapter. Does Prometheus remote read support redirects as detailed in HTTP specification? I want to avoid adding another hop in forwarding time series responses via the old adapter.

current flow:

<prometheus>  

       ---grpc/http-->  <legacy_remote_read_adapter> 

                                             -----custom_protocol---> legacy_backend

new flow:

<prometheus>

       ---grpc/http-->  <legacy_remote_read_adapter> 

                                       (now <= T)  -----custom_protocol---> legacy_backend

                                       (now > T)    ----http/redirect to new adapter

                                                                    ---> new_remote_read_adapter  ---> new_backend

                                                                                   ---> ts directly to prometheus 

In the highlighted section of flow, I want to use redirect so the response is forwarded directly to prometheus from the new remote read adapter.

[Julien Pivotto]

If follow_redirect is true, it should work. This is the default value.

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[Johny]

thanks!