S3Error: Invalid Request (invalid hostname) occurs when a Docker container has a valid hostname that includes an _ underscore.

[Trucker9]

Hi,

I tried to connect to the MinIO container that I deployed locally using the following configuration:

  minio_pishrun:
    image: minio/minio:latest
    container_name: minio_pishrun
    ports:
      - "9000:9000"
      - "9001:9001" 
    environment:
      MINIO_ROOT_USER: "something"
      MINIO_ROOT_PASSWORD: "something"
    command: server /data --console-address ":9001"
    volumes:
      - minio_pishrun_data:/data

I created a client instance as:

export const minioClient = new Minio.Client({
  // ...
  endPoint: 'minio_pishrun',
  // ...
});

However, I encountered the error S3Error: Invalid Request (invalid hostname) every time I tried to perform an operation.

After some research, I came across a similar issue in the Python package.) Following the solution mentioned there, I removed the underscore from the name and used minoPishrun instead, which resolved the issue.