feat(otel): add support for opentelemetry logs

[rachelyangdog]

Description

Adds OpenTelemetry logs support to dd-trace-php, gated behind a new DD_LOGS_OTEL_ENABLED configuration flag.

New config flag: DD_LOGS_OTEL_ENABLED (default: false) enables OTel log collection and OTLP export. When enabled, Datadog's own log injection is suppressed so the two pipelines don't conflict.

• CompositeResolver now handles logs signal endpoints and protocols alongside the existing metrics support. Endpoint/protocol resolution is refactored from metrics-specific to signal-agnostic

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.78%. Comparing base (fd1ba67) to head (5e7dc32).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3748      +/-   ##
==========================================
- Coverage   68.85%   68.78%   -0.08%     
==========================================
  Files         166      166              
  Lines       19015    19015              
  Branches     1792     1792              
==========================================
- Hits        13093    13079      -14     
- Misses       5111     5124      +13     
- Partials      811      812       +1     

Flag	Coverage Δ
helper-rust-integration	78.82% <ø> (ø)
helper-rust-unit	49.36% <ø> (ø)

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see 3 files with indirect coverage changes

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[datadog-prod-us1-5]

✨ Fix all issues with BitsAI or with Cursor

⚠️ Warnings

🧪 31 Tests failed

tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking.test_login_event_blocking_auto_id[apache-mod-8.0] from system_tests_suite     (Fix with Cursor)

AssertionError: assert 500 == 200
 +  where 500 = HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:52:27 GMT', 'Server': 'Apache/2.4.66 (Debian)', 'X...ed-By': 'PHP/8.0.18', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:).status_code
 +    where HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:52:27 GMT', 'Server': 'Apache/2.4.66 (Debian)', 'X...ed-By': 'PHP/8.0.18', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:) = <tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking object at 0x7f1cd818eae0>.r_login

self = <tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking object at 0x7f1cd818eae0>

    def test_login_event_blocking_auto_id(self):
>       assert self.r_login.status_code == 200
E       AssertionError: assert 500 == 200
E        +  where 500 = HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:52:27 GMT', 'Server': 'Apache/2.4.66 (Debian)', 'X...ed-By': 'PHP/8.0.18', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:).status_code
...

tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking.test_login_event_blocking_auto_id[php-fpm-8.5] from system_tests_suite     (Fix with Cursor)

AssertionError: assert 500 == 200
 +  where 500 = HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:51:58 GMT', 'Server': 'Apache/2.4.67 (Ubuntu)', 'X...red-By': 'PHP/8.5.5', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:).status_code
 +    where HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:51:58 GMT', 'Server': 'Apache/2.4.67 (Ubuntu)', 'X...red-By': 'PHP/8.5.5', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:) = <tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking object at 0x7f76502d62d0>.r_login

self = <tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking object at 0x7f76502d62d0>

    def test_login_event_blocking_auto_id(self):
>       assert self.r_login.status_code == 200
E       AssertionError: assert 500 == 200
E        +  where 500 = HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:51:58 GMT', 'Server': 'Apache/2.4.67 (Ubuntu)', 'X...red-By': 'PHP/8.5.5', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:).status_code
...

tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking.test_login_event_blocking_auto_login[apache-mod-8.0] from system_tests_suite     (Fix with Cursor)

AssertionError: assert 500 == 200
 +  where 500 = HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:52:55 GMT', 'Server': 'Apache/2.4.66 (Debian)', 'X...ed-By': 'PHP/8.0.18', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:).status_code
 +    where HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:52:55 GMT', 'Server': 'Apache/2.4.66 (Debian)', 'X...ed-By': 'PHP/8.0.18', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:) = <tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking object at 0x7f1cd818f380>.r_login

self = <tests.appsec.test_automated_login_events.Test_V3_Login_Events_Blocking object at 0x7f1cd818f380>

    def test_login_event_blocking_auto_login(self):
>       assert self.r_login.status_code == 200
E       AssertionError: assert 500 == 200
E        +  where 500 = HttpResponse(status_code:500, headers:{'Date': 'Thu, 07 May 2026 19:52:55 GMT', 'Server': 'Apache/2.4.66 (Debian)', 'X...ed-By': 'PHP/8.0.18', 'Content-Length': '0', 'Connection': 'close', 'Content-Type': 'text/html; charset=UTF-8'}, text:).status_code
...

View all

ℹ️ Info

No other issues found (see more)

❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 60.71% (-0.00%)

Useful? React with 👍 / 👎

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: d0b32bc | Docs | Datadog PR Page | Give us feedback!}

[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2026-05-07 20:37:08

Comparing candidate commit d0b32bc in PR branch rachel.yang/otel-logs with baseline commit 9fe0330 in branch master.

Found 3 performance improvements and 2 performance regressions! Performance is the same for 187 metrics, 2 unstable metrics.

scenario:EmptyFileBench/benchEmptyFileBaseline

• 🟩 execution_time [-296.522µs; -89.518µs] or [-9.083%; -2.742%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization

• 🟩 execution_time [-8.746µs; -7.654µs] or [-7.765%; -6.796%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

• 🟩 execution_time [-7.537µs; -5.683µs] or [-6.886%; -5.192%]

scenario:PDOBench/benchPDOOverheadWithDBM

• 🟥 execution_time [+5.312µs; +7.758µs] or [+2.142%; +3.128%]

scenario:PHPRedisBench/benchRedisOverhead-opcache

• 🟥 execution_time [+34.198µs; +47.533µs] or [+3.399%; +4.725%]

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Prevent logs mode from enabling all OTel signals

When only DD_LOGS_OTEL_ENABLED=true is set, this makes OTEL_PHP_AUTOLOAD_ENABLED resolve to true, and the OpenTelemetry PHP autoloader initializes tracer, meter, and logger providers together. Because this resolver does not also force OTEL_TRACES_EXPORTER and OTEL_METRICS_EXPORTER to none, their SDK defaults remain otlp, so enabling Datadog's OTel logs mode can also start exporting traces and metrics for applications that did not opt into those signals.

Useful? React with 👍 / 👎.