ERPNext S3 Integration

ERPNext S3 Integration is a Frappe app by Solufy that stores ERPNext attachments and backups in S3-compatible object storage.

It supports AWS S3 and compatible providers such as MinIO, keeps existing S3-backed files accessible inside ERPNext, and provides a settings-driven workflow for file migration and backup sync.

Features

• Store new ERPNext File attachments in S3 instead of the local filesystem.

• Open S3-backed files inside ERPNext through a secure application route.

• Support both direct streaming and pre-signed URL redirects for file delivery.

• Migrate existing local attachments to S3 in the background.

• Sync database and file backups to S3.

• Schedule backup sync using a CRON expression from the settings doctype.

• Optionally delete S3 objects when the related ERPNext File record is deleted.

• Optionally remove local backup files after successful S3 upload.

• Support custom bucket prefixes for both attachments and backups.

• Support S3-compatible endpoints with path-style addressing for MinIO and similar providers.

Requirements

• Frappe / ERPNext v16 bench

• Python 3.14+

• An S3-compatible bucket

• Valid access credentials for the target bucket

Setup

1. Open S3 Integration Settings in ERPNext.

2. Enter the S3 connection details:

   • AWS Access Key ID

   • AWS Secret Access Key

   • Region Name

   • Bucket Name

   • Endpoint URL if you are using MinIO or another S3-compatible service

   • Use Path Style if required by your storage provider

3. Optionally set Folder Prefix to keep all objects under a dedicated root path.

4. Save the document.

5. Click Test Connection.

Attachment Storage Setup

To store new attachments in S3:

1. Enable Enable Attachments S3.

2. Choose whether files should be streamed through ERPNext or served with pre-signed URLs using Stream From S3.

3. Optionally enable Delete From S3 On File Delete.

4. Save the settings.

From that point onward, newly uploaded ERPNext attachments are stored in S3.

Existing File Migration

To migrate existing files already stored on disk:

1. Open S3 Integration Settings.

2. Ensure Enable Attachments S3 is enabled.

3. Enable Migrate Only Unmigrated if you want to skip rows already pointing to S3.

4. Click Migrate Existing Files.

The migration runs as a background job. It uploads local files to S3 and updates the corresponding File.file_url to the /s3/... route used by the app.

Backup Sync Setup

To send ERPNext backups to S3:

1. Enable Enable Backups S3.

2. Choose whether to upload database backups, file backups, or both.

3. Set Backup Folder Prefix if you want backups stored separately from attachments.

4. Set Backup CRON Expression.

5. Choose whether to create a fresh backup before sync.

6. Choose whether to keep local backups after upload.

7. Save the settings.

The scheduler checks the CRON expression and uploads backup files to S3 when the next run time is due.

You can also trigger an immediate manual sync from the settings form with Take Backup and Sync.

Behavior Notes

• Disabling Enable Attachments S3 stops new uploads from being redirected to S3.

• Existing files that already point to /s3/... remain accessible as long as the S3 credentials are still configured.

• External file URLs such as http:// and https:// are skipped by the migration tool.

• The app uses a File override so ERPNext can read S3-backed files without expecting them on local disk.

Verification Checklist

• Test Connection succeeds.

• A newly uploaded attachment gets a /s3/... URL in the File record.

• Opening an existing S3-backed file works from ERPNext.

• Manual backup sync uploads the expected backup artifacts.

• Scheduled backup sync runs with the configured CRON expression.

Support

• Company: Solufy Pvt. Ltd.

• Email: sahil@solufy.in