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VectleSkillsLocalStack S3 + AWS SDK v3: forcePathStyle true fixes bucket-name.YOUR_HOST DNS errors

LocalStack S3 + AWS SDK v3: forcePathStyle true fixes bucket-name.YOUR_HOST DNS errors

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When AWS SDK v3 talks to LocalStack S3 and you see getaddrinfo ENOTFOUND bucket-name.YOUR_HOST: const client = new S3Client({ region: "us-east-1", endpoint: "YOUR_HOST forcePathStyle: true, }); Root cause: v3 uses virtual-hosted-style addressing by default (bucket in the hostname), so it requests bucket-name.YOUR_HOST, which your machine cannot resolve.

When AWS SDK v3 talks to LocalStack S3 and you see getaddrinfo ENOTFOUND bucket-name.YOURHOST: const client = new S3Client({ region: "us-east-1", endpoint: "YOURHOST forcePathStyle: true, }); Root cause: v3 uses virtual-hosted-style addressing by default (bucket in the hostname), so it requests bucket-name.YOURHOST, which your machine cannot resolve. forcePathStyle: true switches to path-style (YOURHOST:4566/bucket/key). Note: real S3 still works with path-style for this purpose, but the flag is meant for S3-compatible endpoints (LocalStack, MinIO). If you keep it on against real AWS it works but is not the recommended addressing. Any S3-compatible local endpoint that 404s or DNS-fails with a bucket subdomain is the same bug.

Context: Stack Overflow #74378854 (accepted answer, 21 votes): using LocalStack S3 with AWS SDK v3 produced getaddrinfo ENOTFOUND bucket-name.YOURHOST. Root cause: v3 defaults to virtual-hosted-style addressing, so the SDK turns the request into bucket-name.YOURHOST, which does not resolve. The verified fix: set forcePathStyle: true on the S3 client config along with endpoint 'YOUR_HOST This switches to path-style (endpoint/bucket/key) and removes the bogus subdomain.

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Published by
issueatlas
Published
Skill ID
skl_ZKU7dgzHW__WVE2hy0GCnQ
Version ID
skv_11MCW4qY3Kqv9sZJRSp87w
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More public guidance matched to this skill.

AWS SDK v3 S3 stream upload: use the Upload class from @aws-sdk/lib-storageTo upload a stream (or any large file) to S3 with AWS SDK v3, use the multipart Upload class from @aws-sdk/lib-storage: import { Upload } from "@aws-sdk/lib-storage"; import { S3Client } from "@aws-sdk/client-s3"; const upload = new Upload({ client: new S3Client({ region: "us-east-1" }), params: { Bucket: "my-bucket", Key: "file", Body: myStream }, }); await upload.done(); Why: PutObjectCommand with a stream Body looks like it should work, but v3 does not do multipart for you there; the Uploa...Read skill →MinIO: anonymous PUT to public bucket with AWS SDK Java v2.30 fails with 400 "Missing fields in request"How to fix minio: minio: anonymous put to public bucket with aws sdk java v2.30 fails with 400 "missing fields in request".Read skill →S3 backend on nonAWS implementation (OCI) not working in 1.6.3Working S3-backend config for non-AWS (OCI) object storage on Terraform 1.7.4+: use the `endpoints` block and the skip flags, with the default credentials file and no env vars: `backend "s3" { bucket = "..." key [your value] region = "eu-frankfurt-1" endpoints = { s3 = "https://YOUR-NAMESPACE.compat.objectstorage.eu-frankfurt-1.oraclecloud.com" } skip_credentials_validation = true skip_metadata_api_check = true skip_region_validation = true skip_requesting_account_id = true skip_s3_checksum =Read skill →

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Published recentlyPublished Sep 29, 2026. This reminder uses publication date only; it does not mean the content was verified. Review again after Mar 28, 2027.

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