feat(lambda): write cloud.account.id symlink from extension#2127
Merged
wpessers merged 4 commits intoopen-telemetry:mainfrom Feb 18, 2026
Merged
feat(lambda): write cloud.account.id symlink from extension#2127wpessers merged 4 commits intoopen-telemetry:mainfrom
wpessers merged 4 commits intoopen-telemetry:mainfrom
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Request the accountId feature from the Lambda Extensions API via the Lambda-Extension-Accept-Feature header. After Register() returns, write a symlink at /tmp/.otel-account-id whose target is the raw AWS account ID string. This allows Lambda SDK resource detectors to read the account ID without an additional API call. The symlink is removed before creation to handle Lambda execution environment reuse where /tmp persists. Failures are logged at debug level and silently skipped.
This was referenced Feb 9, 2026
serkan-ozal
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Feb 12, 2026
herin049
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Feb 12, 2026
wpessers
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Feb 13, 2026
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Thank you for the contribution. Will merge as soon as the open remarks have been addressed.
Address review feedback: - Rename symlink path from /tmp/.otel-account-id to /tmp/.otel-aws-account-id - Change symlink creation failure log from Debug to Warn
wpessers
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Thanks @RaphaelManke 🚀 This will be included in the next release, should be either tomorrow or friday!
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Summary
Register()call, the extension now creates a symlink at/tmp/.otel-aws-account-idwith the AWS account ID as the targetaccountIdfeature via theLambda-Extension-Accept-Feature: accountIdheaderThis enables all OTel SDK Lambda resource detectors to read
cloud.account.idviareadlink()without needing IAM calls.Changes
collector/internal/extensionapi/client.go— ParseaccountIdfrom Register response, send Accept-Feature headercollector/internal/lifecycle/manager.go— Create symlink after registrationRelated PRs
SDK-side implementations that read this symlink (will be linked once created).
Test plan