envoyproxy/envoy

admin: making a streaming version of /config_dump

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#32.054 aperta il 25 gen 2024

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area/adminarea/perfenhancementhelp wanted

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Descrizione

/config_dump can produce a remarkably huge response. This will need to be fully buffered both as a protobuf message and an in-memory continuous string. For large configs, this will be slow and may exert memory pressure as well.

See also #31755 as well as prior work streaming admin stats in https://github.com/envoyproxy/envoy/pull/19693. This work is not trivial and has risks. See also the difficult attempt to make /stats/prometheus stream as well: https://github.com/envoyproxy/envoy/pull/24998 which needed to be rolled back due to complexities in the Prom format that made streaming difficult. See also https://github.com/envoyproxy/envoy/pull/28988 which adds a streaming json serializer, which probably should be used for this, rather than creating a protobuf structure and then serializing that.

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