feat(otlp): add reqwest-native-tls feature flag for HTTP transport #3330
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Add optional `reqwest-native-tls` feature flag to opentelemetry-http and opentelemetry-otlp crates, enabling the use of system native TLS instead of bundled rustls. This is particularly beneficial for Linux distribution packagers who need to link against system libraries (OpenSSL) rather than bundling TLS implementations. Using system TLS allows: - Leveraging system-managed security updates for TLS/OpenSSL - Reducing binary size by avoiding bundled crypto libraries - Ensuring consistency with system certificate stores - Complying with distribution packaging policies that prefer system libs On other platforms, this uses Schannel (Windows) and Secure Transport (macOS). Usage: cargo build --no-default-features --features "http-proto,reqwest-native-tls,trace,metrics,logs"
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #3330 +/- ##
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- Coverage 81.0% 81.0% -0.1%
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Files 129 129
Lines 23697 23697
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- Hits 19217 19216 -1
- Misses 4480 4481 +1 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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lalitb
reviewed
Feb 3, 2026
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| - `reqwest`'s crypto backend has changed from `ring` to `aws-lc-sys`. | ||
| - Add `reqwest-native-tls` feature flag to enable system native TLS (OpenSSL on Linux, Schannel on Windows, Secure Transport on macOS). | ||
| - Update `reqwest-rustls` and `reqwest-rustls-webpki-roots` features to use explicit `rustls-tls` instead of `default-tls` for clarity. |
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@r0x0d - Can you check this changelog - as I don't see rustls-tls anywhere in the code
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Changes
Add optional
reqwest-native-tlsfeature flag to opentelemetry-http and opentelemetry-otlp crates, enabling the use of system native TLS instead of bundled rustls.This is particularly beneficial for Linux distribution packagers who need to link against system libraries (OpenSSL) rather than bundling TLS implementations. Using system TLS allows:
On other platforms, this uses Schannel (Windows) and Secure Transport (macOS).
Merge requirement checklist
CHANGELOG.mdfiles updated for non-trivial, user-facing changes