How to configure delta lake in dragster with s3 or minio? What root_uri to use?

To configure Delta Lake in Dagster with S3 or MinIO, you need to set up an I/O manager that specifies the storage options for your Delta tables. The

root_uri

is a critical part of this configuration, as it defines the root path where your Delta tables will be created and managed. Here's a step-by-step guide based on the documentation: 1. Install the necessary libraries: Make sure you have installed the

dagster-deltalake

and

dagster-deltalake-pandas

libraries. You can install them using pip:

pip install dagster-deltalake dagster-deltalake-pandas

2. Configure the Delta Lake I/O manager: You need to provide a

root_uri

and

storage_options

to configure the Delta Lake I/O manager. The

root_uri

should point to the location where you want to store your Delta tables. For S3 or MinIO, this will be the S3 bucket path or the MinIO bucket path. Here's an example configuration for S3:

python
   from dagster_deltalake import DeltaLakePandasIOManager
   from dagster import Definitions

   defs = Definitions(
       assets=[...],  # your assets go here
       resources={
           "io_manager": DeltaLakePandasIOManager(
               root_uri="<s3://path/to/deltalake>",  # required
               storage_options=...,  # required, S3 storage options
               schema="...",  # optional, defaults to "public"
           )
       },
   )

And for MinIO, you would configure the

storage_options

to include your MinIO connection details:

python
   from dagster_deltalake import DeltaLakePandasIOManager
   from dagster import Definitions

   defs = Definitions(
       assets=[...],  # your assets go here
       resources={
           "io_manager": DeltaLakePandasIOManager(
               root_uri="<http://minio:9000/dagster>",  # required, MinIO URI
               storage_options={
                   "provider": "s3",
                   "access_key_id": "<access_key_here>",
                   "secret_access_key": "<secret_key_here>",
                   "endpoint": "<http://minio:9000>",  # MinIO endpoint
                   "bucket": "dagster",
                   "region": "us-west-1",
               },
               schema="...",  # optional, defaults to "public"
           )
       },
   )

In the

storage_options

, you would specify the connection details for S3 or MinIO, such as

access_key_id

,

secret_access_key

,

endpoint

, and other relevant options. 3. Use the configured I/O manager: Once you have defined your

Definitions

object with the Delta Lake I/O manager, Dagster will handle storing and loading your assets in Delta Lake using the specified

root_uri

and

storage_options

. Remember to replace the placeholder values with your actual S3 or MinIO configuration details. The `root_