feat: honor NO_GCE_CHECK environment variable#1610
Merged
chalmerlowe merged 10 commits intogoogleapis:mainfrom Jan 9, 2026
Merged
feat: honor NO_GCE_CHECK environment variable#1610chalmerlowe merged 10 commits intogoogleapis:mainfrom
NO_GCE_CHECK environment variable#1610chalmerlowe merged 10 commits intogoogleapis:mainfrom
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Hey folks / maintainers, just to bump this up a bit. Would it be possible to merge / release this? What else do we need to do here - please let us know. |
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PR created by the Librarian CLI to initialize a release. Merging this PR will auto trigger a release. Librarian Version: v1.0.1 Language Image: us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:b8058df4c45e9a6e07f6b4d65b458d0d059241dd34c814f151c8bf6b89211209 <details><summary>google-auth: 2.48.0</summary> ## [2.48.0](v2.47.0...v2.48.0) (2026-01-21) ### Features * honor `NO_GCE_CHECK` environment variable (#1610) ([383c982](383c9827)) * add configurable GCE Metadata Server retries (#1488) ([454b441](454b441b)) * add cryptography as required dependency (#1929) ([52558ae](52558ae2)) * Support the mTLS IAM domain for Certificate based Access (#1938) ([8dcf91a](8dcf91a1)) ### Bug Fixes * resolve circular imports (#1942) ([25c1b06](25c1b064)) * Use `user_verification=preferred` for ReAuth WebAuthn challenge (#1798) ([3f88a24](3f88a240)) * removes `content-header` from AWS IMDS get request (#1934) ([97bfea9](97bfea9e)) * detect correct auth when ADC env var is set but empty (#1374) ([bfc07e1](bfc07e10)) * replace deprecated utcfromtimestamp (#1799) ([e431f20](e431f20c)) </details>
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Currently,
google.auth.default()always attempts to authenticate using the Google Compute Engine (GCE) metadata service as a fallback. There is no easy way to prevent this behavior, leading to unnecessary delays and unhelpful exceptions, particularly in cases where GCE-based authentication is pointless or undesired.This pull request introduces a
NO_GCE_CHECKenvironment variable, allowing users to explicitly skip GCE metadata service authentication. This implementation mirrorsNO_GCE_CHECKin googleapis/google-auth-library-java:Note
Other clouds also provide similar environment variables, such as
AWS_EC2_METADATA_DISABLEDon AWS.This change is also tangentially related to the following pull requests: