fix(observability): read the standard OTEL_* variables above stored endpoints - #56
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…ndpoints An exported variable is what the operator asked for now, and a stored one is what somebody asked for once, so the standard names belong directly under T3 Code's own rather than under a file. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
PR SummaryMedium Risk Overview Per signal, order is now Server config drops global
WSL forwards the full OTEL/T3CODE observability variable set via Reviewed by Cursor Bugbot for commit 7f38f2f. Bugbot is set up for automated code reviews on this repo. Configure here. |
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📝 WalkthroughWalkthroughThe change centralizes OTLP source precedence and per-signal export settings. Server and desktop configuration now resolve T3 Code, standard OpenTelemetry, and persisted endpoints consistently. Shared parsing, WSL forwarding, tests, and documentation cover the updated behavior. ChangesOTLP signal resolution
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Bug fix Suggested reviewers: Sequence Diagram(s)sequenceDiagram
participant EnvironmentVariables
participant OtelEnvironment
participant ServerConfig
participant DesktopOtlpExport
participant WSLBackend
EnvironmentVariables->>OtelEnvironment: provide T3CODE_OTLP_* and OTEL_* values
OtelEnvironment->>ServerConfig: return resolved server signals and export settings
OtelEnvironment->>DesktopOtlpExport: return resolved desktop signals and export settings
WSLBackend->>OtelEnvironment: receive forwarded observability variables
ServerConfig->>ServerConfig: configure per-signal exporters
DesktopOtlpExport->>DesktopOtlpExport: create desktop signal exporters
Merge Risk: 🔵 Low · up to Observability export remains functional, but configuration guidance and diagnostics can mislead operators about malformed headers and exporter lists. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@apps/server/src/cli/config.ts`:
- Around line 403-413: Normalize blank or whitespace-only bootstrap OTLP
endpoints before the nullish coalescing in the metrics and logs resolution flow,
using the existing equivalent handling for traces as a guide. Ensure valid
persistedObservabilitySettings values remain selected when bootstrap endpoints
are blank, and add a regression test covering a blank bootstrap endpoint with a
valid Settings endpoint.
In `@packages/shared/src/otelEnvironment.ts`:
- Around line 612-618: Update OtlpSignal and
OtelEnvironment.load/resolveSignalSource to preserve an explicit disabled state
for OTEL_{SIGNAL}_EXPORTER=none, distinguish it from an absent standard
endpoint, and block persistedUrl fallback when disabled. Continue honoring
higher-precedence T3CODE_OTLP_* settings, and add a regression test covering
OTEL_LOGS_EXPORTER=none with a persisted endpoint.
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📒 Files selected for processing (8)
apps/desktop/src/app/DesktopObservability.tsapps/desktop/src/app/DesktopOtlpExport.test.tsapps/desktop/src/app/DesktopOtlpExport.tsapps/server/src/cli/config.test.tsapps/server/src/cli/config.tsdocs/fork/0018-the-standard-otel-variables-are-honored.mddocs/operations/observability.mdpackages/shared/src/otelEnvironment.ts
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A delta-only OTLP intake accepts cumulative histograms and discards them without an error, so falling lowmemory back to the default inverted the only part of the request that is about the data, and inverted it toward silent loss. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
…rce's endpoint A signal's endpoint and the settings around it have to come from the same place. Reading the wire format, headers, batching, or aggregation from whichever variable happened to be set sends a credential to a collector that never asked for one, and paces an export the setting knows nothing about. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
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…turned off An exported variable is the more recent answer about a signal, so a URL somebody saved once must not export a signal an operator just switched off. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
…d one in WSL The bootstrap envelope cannot say which variable put a URL in it, so a name that only travels that way loses the precedence it has on every other platform. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
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Actionable comments posted: 3
- 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
minimal, and validate.
Inline comments:
In `@docs/operations/observability.md`:
- Around line 372-374: Clarify the exporter-list behavior in the documentation
around the statement that unrecognized exporter names are ignored: distinguish
known foreign exporters such as console, which disable the signal, from unknown
or misspelled names, which are ignored while other valid variables continue
exporting. Ensure the wording is consistent with the behavior described near the
known-exporter handling.
- Around line 391-395: Update the malformed-header example in the observability
documentation so it does not claim that authorization=token,x-tenant reaches the
collector or routes to a tenant when the entire invalid value is discarded.
Describe this as a prevented partial-parse risk, or accurately state the current
discard behavior while preserving the surrounding explanation of malformed OTLP
variables.
In `@packages/shared/src/otelEnvironment.ts`:
- Around line 349-350: Update the exporter-entry validation flow around the otlp
check so every entry is classified and invalid entries emit warnings before
determining the result. Preserve returning true when the list contains otlp, but
do not return early; ensure mixed values such as otlp with an unknown exporter
are reported, and add a regression test covering that case.
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📒 Files selected for processing (19)
apps/desktop/src/app/DesktopOtlpExport.test.tsapps/desktop/src/app/DesktopOtlpExport.tsapps/desktop/src/backend/DesktopBackendConfiguration.test.tsapps/desktop/src/backend/DesktopBackendConfiguration.tsapps/server/src/bin.test.tsapps/server/src/cli/config.test.tsapps/server/src/cli/config.tsapps/server/src/cli/pair.tsapps/server/src/config.tsapps/server/src/environment/ServerEnvironment.test.tsapps/server/src/http.tsapps/server/src/observability/Layers/Observability.tsapps/server/src/server.test.tsapps/server/src/serverLogger.test.tsapps/server/src/serverLogger.tsdocs/fork/0018-the-standard-otel-variables-are-honored.mddocs/operations/observability.mdpackages/shared/src/otelEnvironment.test.tspackages/shared/src/otelEnvironment.ts
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- docs/fork/0018-the-standard-otel-variables-are-honored.md
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A transposed letter beside a working name looked like it took. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
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…cs it did not place Startup said delta was in use on machines whose metrics endpoint came from elsewhere. Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>
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An exported variable is what the operator asked for now, and a stored one is what somebody asked
for once.
OTEL_*was sitting under the desktop bootstrap envelope and Settings, so an endpointsaved in a file outranked one exported in the shell, which is backwards from how every other
setting is read here.
It is also the order
T3CODE_OTEL_SDK_DISABLEDandOTEL_SDK_DISABLEDalready follow. Two namesfor the same setting should not sit at opposite ends of the chain depending on which setting it is.
The tradeoff this buys: an ambient
OTEL_EXPORTER_OTLP_ENDPOINTnow overrides an endpoint set inSettings.
T3CODE_OTLP_*is the answer for a stored endpoint nothing on the machine can redirect,and it still outranks everything.
The order now lives in one exported function instead of being spelled out separately in the server
and the desktop main process. Those two reading the same machine differently is the failure this
module exists to prevent, and it was one edit away the whole time.
OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE=lowmemorywas falling back to the default,which was the wrong half of it to keep. A receiver that accepts delta histograms only, which is
how Datadog's OTLP intake behaves, discards cumulative histograms without reporting an error, so
every
_durationtimer disappeared while the_totalcounters kept arriving.lowmemoryasksfor delta on synchronous counters and histograms and every metric recorded here is one of those,
so it now resolves to
delta, which is exact rather than near enough. Unset still meanscumulative, and that value is now named and applied here instead of left to the exporterlibrary's own fallback.
Only an
OTEL_*metrics endpoint can choose its aggregation, which follows from the whole-signalrule and is now written down as a known gap. A Datadog-style backend behind
T3CODE_OTLP_METRICS_URLor Settings has no way to ask for delta.The whole-signal rule was implemented for the URL and not for the settings around it. A signal
whose endpoint came from
OTEL_EXPORTER_OTLP_ENDPOINTwas still being handedT3CODE_OTLP_HEADERS, so a credential written for one collector was posted to another one, andT3CODE_OTLP_EXPORT_INTERVAL_MSwas pacing an export it had not configured while discarding theper-signal number standing next to that endpoint.
settings?.x ?? t3xis what caused it:optional chaining collapses "the standard variables named nothing here" with "they own this
signal and are silent about this knob", and the second is an answer of its own.
The resolved answer is now the only thing the exporters read, so a URL cannot be paired by hand
with settings from a different source. That also removes the last duplicate of this logic between
the server and the desktop main process.
OTEL_{TRACES,METRICS,LOGS}_EXPORTERwas reading any value that was nototlpas "not OTLP", soone transposed letter turned a signal off with nothing in the log connecting the two. A name T3
Code recognizes and has no implementation of is a deliberate request and still stops that signal;
a name it recognizes as nothing at all is a typo and is reported and ignored.
A malformed header list was being kept in part, and a batch size of zero was being accepted.
authorization=token,x-tenantwould authenticate and then route to the wrong tenant, which readsas a collector problem rather than the typo it is, and a threshold of zero is met on every record,
so the exporter stops batching and posts one HTTP request per span. Neither value is unreadable;
both would do damage while looking honored.
A blank endpoint in the desktop bootstrap envelope was standing in front of the Settings endpoint
underneath it. The desktop sends the envelope whether or not it resolved anything, so an empty
string means "I found nothing", not "export nowhere".
On Windows the standard variables reached the WSL backend as endpoints only. The envelope carries
the URLs but nothing else those variables say, and it is the lowest-priority source, so an
operator's
OTEL_*setup silently degraded to T3 Code's defaults on one platform: the collectorinside the distro got an unauthenticated stream in the wrong wire format.
Nothing covered the old order, which is how it survived review. Both processes now have a test
that an exported endpoint wins, that T3 Code's own name still wins over both, and that a stored
endpoint still answers for the signals nothing exported.
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Bug Fixes
Documentation