{"record":{"id":"106fb4967d9b37c3","repo":"kubernetes/kops","slug":"error-connecting-to-s3-s","errorCode":null,"errorMessage":"error connecting to S3: %s","messagePattern":"error connecting to S3: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"util/pkg/vfs/s3context.go","lineNumber":197,"sourceCode":"\t\t\tif err != nil {\n\t\t\t\tklog.V(2).Infof(\"unable to get region from metadata:%v\", err)\n\t\t\t} else {\n\t\t\t\tawsRegion = region\n\t\t\t\tklog.V(2).Infof(\"got region from metadata: %q\", awsRegion)\n\t\t\t}\n\t\t}\n\t}\n\n\tif awsRegion == \"\" {\n\t\tawsRegion = \"us-east-1\"\n\t\tklog.V(2).Infof(\"defaulting region to %q\", awsRegion)\n\t}\n\n\ts3Client, err := s.getClient(ctx, awsRegion, func(o *s3.Options) {\n\t\to.EndpointResolverV2 = &ResolverV2{}\n\t})\n\tif err != nil {\n\t\treturn bucketDetails, fmt.Errorf(\"error connecting to S3: %s\", err)\n\t}\n\t// Attempt one GetBucketLocation call the \"normal\" way (i.e. as the bucket owner)\n\tresponse, err := s3Client.GetBucketLocation(ctx, &s3.GetBucketLocationInput{\n\t\tBucket: &bucket,\n\t})\n\n\tif err != nil {\n\t\t// GetBucketLocation only works for the bucket owner from any region, or from the bucket's\n\t\t// region. Fall back to HeadBucket, which works cross-account and cross-region.\n\t\tklog.V(2).Infof(\"unable to get bucket location from region %q; falling back to HeadBucket: %v\", awsRegion, err)\n\t\tbucketDetails.region, err = bucketLocationViaHead(ctx, s3Client, bucket)\n\t\tif err != nil {\n\t\t\treturn bucketDetails, err\n\t\t}\n\t} else if len(response.LocationConstraint) == 0 {\n\t\t// US Classic does not return a region\n\t\tbucketDetails.region = \"us-east-1\"\n\t} else {","sourceCodeStart":179,"sourceCodeEnd":215,"githubUrl":"https://github.com/kubernetes/kops/blob/4c8573c808a73d578c5eadc86d410646ea0b0d73/util/pkg/vfs/s3context.go#L179-L215","documentation":"Returned by getDetailsForBucket when getClient fails to build an S3 client for the resolved region (defaults to us-east-1 when region detection finds nothing). The client construction failure — bad credentials, no region, or a broken custom endpoint config — is wrapped with this bucket-discovery context, so bucket region detection cannot proceed.","triggerScenarios":"Thrown at util/pkg/vfs/s3context.go:197 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Verify AWS credentials are obtainable (env, profile, or instance metadata)","Set AWS_REGION/AWS_DEFAULT_REGION explicitly when metadata-service region detection fails or is blocked","If using S3_ENDPOINT, ensure S3_ACCESS_KEY_ID and S3_SECRET_ACCESS_KEY are both set"],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"4c8573c808a73d578c5eadc86d410646ea0b0d73","analyzedAt":"2026-09-05T04:13:19.212Z","contentChangedAt":"2026-09-05T04:13:19.212Z","schemaVersion":2},"datasetVersion":"2026-09-12T12:17:11.808Z"}