When using external MinIO as the data storage, the successfully uploaded images fail to display and cannot be annotated.

[chunxueer]

Describe the bug
Holle. When using external MinIO as the data storage, the successfully uploaded images fail to display and cannot be annotated.

To Reproduce
Steps to reproduce the behavior:

1. Configure to use MinIO as the data storage
2. Create a project and upload images
3. The images fail to display

Screenshots
If applicable, add screenshots to help explain your problem.

Console output is as follows:

sti-label-studio-1  | {"timestamp": "19/Nov/2025:09:13:21 +0000", "source": "uwsgi", "levelname": "INFO", "message": "Starting new HTTPS connection (1): pypi.org:443"}
sti-label-studio-1  | {"timestamp": "19/Nov/2025:09:13:21 +0000", "source": "uwsgi", "levelname": "INFO", "message": "https://pypi.org:443 \"GET /pypi/label-studio/json HTTP/1.1\" 200 35580"}
sti-label-studio-1  | {"timestamp": "19/Nov/2025:09:13:23 +0000", "source": "uwsgi", "levelname": "INFO", "message": "https://pypi.org:443 \"GET /pypi/label-studio/json HTTP/1.1\" 200 35580"}
sti-label-studio-1  | {"timestamp": "19/Nov/2025:09:13:24 +0000", "source": "uwsgi", "levelname": "INFO", "message": "WSGI app 0 (mountpoint='') ready in 15 seconds on interpreter 0x7f47406719d0 pid: 696 (default app)"}
sti-label-studio-1  | {"timestamp": "19/Nov/2025:09:13:31 +0000", "source": "uwsgi", "levelname": "INFO", "message": "WSGI app 0 (mountpoint='') ready in 22 seconds on interpreter 0x7f47406719d0 pid: 697 (default app)"}
sti-label-studio-1  | /label-studio/.venv/lib/python3.13/site-packages/rest_framework/pagination.py:207: UnorderedObjectListWarning: Pagination may yield inconsistent results with an unordered object_list: <class 'labels_manager.models.LabelLink'> QuerySet.
sti-label-studio-1  |   paginator = self.django_paginator_class(queryset, page_size)
sti-label-studio-1  | 
sti-label-studio-1  | /label-studio/.venv/lib/python3.13/site-packages/rest_framework/pagination.py:207: UnorderedObjectListWarning: Pagination may yield inconsistent results with an unordered object_list: <class 'labels_manager.models.LabelLink'> QuerySet.
sti-label-studio-1  |   paginator = self.django_paginator_class(queryset, page_size)
sti-label-studio-1  | 

Environment (please complete the following information):

docker-compose.yml

services:
  sti-label-studio:
    stdin_open: true
    tty: true 
    image: heartexlabs/label-studio:latest
    restart: unless-stopped
    expose:
      - "8000"
    ports:
      - "35001:8000" 
    environment:
      - DJANGO_DB=default
      - POSTGRE_NAME=${POSTGRE_NAME}
      - POSTGRE_USER=${POSTGRE_USER}
      - POSTGRE_PASSWORD=${POSTGRE_PASSWORD}
      - POSTGRE_PORT=${POSTGRE_PORT}
      - POSTGRE_HOST=${POSTGRE_HOST}
      - LABEL_STUDIO_HOST=${LABEL_STUDIO_HOST:-}
      
      - AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID}
      - AWS_SECRET_ACCESS_KEY=${AWS_SECRET_ACCESS_KEY}
      - AWS_STORAGE_BUCKET_NAME=${AWS_STORAGE_BUCKET_NAME}
      - AWS_S3_ENDPOINT_URL=${AWS_S3_ENDPOINT_URL}
      - AWS_S3_REGION_NAME=${AWS_S3_REGION_NAME}
      - AWS_DEFAULT_ACL=${AWS_DEFAULT_ACL}
      - USE_S3_STORAGE=${USE_S3_STORAGE}

      - STORAGE_TYPE=${STORAGE_TYPE}
      - STORAGE_AWS_ACCESS_KEY_ID=${STORAGE_AWS_ACCESS_KEY_ID}
      - STORAGE_AWS_SECRET_ACCESS_KEY=${STORAGE_AWS_SECRET_ACCESS_KEY}
      - STORAGE_AWS_BUCKET_NAME=${STORAGE_AWS_BUCKET_NAME}
      - STORAGE_AWS_FOLDER=${STORAGE_AWS_FOLDER}
      - STORAGE_AWS_REGION_NAME=${STORAGE_AWS_REGION_NAME}
      - STORAGE_AWS_ENDPOINT_URL=${STORAGE_AWS_ENDPOINT_URL} 
      - STORAGE_AWS_OBJECT_PARAMETERS=${STORAGE_AWS_OBJECT_PARAMETERS}
      
      - JSON_LOG=1
    #      - LOG_LEVEL=DEBUG
    volumes:
      - /data/sti/label-studio/data:/label-studio/data:rw
    command: label-studio-uwsgi

Additional context
Add any other context about the problem here.

[heidi-humansignal]

Hello,

Thank you for contacting Label Studio,
Could you please check the following configuration and let me know if it resolves the outcome.

• Current STORAGE_AWS_ENDPOINT_URL
• MinIO CORS config ( it is essential to enable CORS from MiniO side )
• check Whether Source Storage “Sync” with “Use pre-signed URLs” ON loads the same image successfully

Best Regards!

Comment by Oussama Assili
Workflow Run

[chunxueer]

1. STORAGE_AWS_ENDPOINT_URL=http://10.20.16.125:9000

2. MinIO supports cross-origin access but requires a username and password. (Source Cloud Storage, Target Cloud Storage, and STORAGE_AWS_ENDPOINT_URL all point to the same MinIO instance—only the buckets or directories differ.)

3. Image URLs in imported tasks that reference the same MinIO instance display normally, e.g. s3://sti-mlflow/datasets/1214243d1dcc47959000ecbbe6dc2395/artifacts/test/images/fish1005_jpg.rf.2d11fcb83b85cc9e091781222d714baa.jpg

After import via Source Cloud Storage (MinIO), the URL is converted to the following format and remains accessible:

http://10.20.16.125:9000/sti-mlflow/datasets/1214243d1dcc47959000ecbbe6dc2395/artifacts/test/images/fish1007_jpg.rf.6cbe169810d099474f3f1a98c1062f29.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=minioadmin%2F20251121%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20251121T140735Z&X-Amz-Expires=1800&X-Amz-SignedHeaders=host&X-Amz-Signature=0c388009f90f964ea220eeb292b199579d07640788f0fd71fe114976bd8445c0

4. For images imported by selecting or uploading files directly, the image URL is /storage-data/uploaded/?filepath=upload/30/eb3560c6-下载.png , and the images fail to display

cat .env

# PostgreSQL  

POSTGRE_HOST=10.20.16.6
POSTGRE_PORT=15434
POSTGRE_NAME=sti_labels
POSTGRE_USER=postgres
POSTGRE_PASSWORD=Wxxxxxxjzq  

# Label Studio 
LABEL_STUDIO_HOST= 
FUTURE_SAVE_TASK_TO_STORAGE=1

# MinIO/S3  
STORAGE_TYPE=s3
STORAGE_AWS_ACCESS_KEY_ID=minioadmin
STORAGE_AWS_SECRET_ACCESS_KEY=3Qxxxxxxx7iEJ
STORAGE_AWS_BUCKET_NAME=sti-label
STORAGE_AWS_FOLDER=artifacts
STORAGE_AWS_REGION_NAME=tdy-sti
STORAGE_AWS_ENDPOINT_URL=http://10.20.16.125:9000
STORAGE_AWS_OBJECT_PARAMETERS=

AWS_ACCESS_KEY_ID=minioadmin            
AWS_SECRET_ACCESS_KEY=3Qxxxxxxx7iEJ
AWS_STORAGE_BUCKET_NAME=sti-label-studio-artifacts  
AWS_S3_ENDPOINT_URL=http://10.20.16.125:9000  
AWS_S3_REGION_NAME=tdy-sti    
AWS_DEFAULT_ACL=private     
USE_S3_STORAGE=1