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proxy: Switch proxy to JSON logging (#9857)

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## Problem

We want to switch proxy and ideally all Rust services to structured JSON
logging to support better filtering and cross-referencing with tracing.

## Summary of changes

* Introduce a custom tracing-subscriber to write the JSON. In a first
attempt a customized tracing::fmt::FmtSubscriber was used, but it's very
inefficient and can still generate invalid JSON. It's also doesn't allow
us to add important fields to the root object.
* Make this opt in: the `LOGFMT` env var can be set to `"json"` to
enable to new logger at startup.
This commit is contained in:
Folke Behrens
2025-02-04 15:50:53 +01:00
committed by GitHub
parent b6e9daea9a
commit dcf335a251
6 changed files with 964 additions and 8 deletions
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workspace_hack/Cargo.toml
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@@ -92,6 +92,7 @@ tonic = { version = "0.12", default-features = false, features = ["codegen", "pr
tower = { version = "0.4", default-features = false, features = ["balance", "buffer", "limit", "util"] }
tracing = { version = "0.1", features = ["log"] }
tracing-core = { version = "0.1" }
tracing-log = { version = "0.2" }
url = { version = "2", features = ["serde"] }
zerocopy = { version = "0.7", features = ["derive", "simd"] }
zeroize = { version = "1", features = ["derive", "serde"] }