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# ask-ai
l

Le Yang

02/29/2024, 11:02 PM
How to configure delta lake in dragster with s3 or minio? What root_uri to use?
s

Scout

02/29/2024, 11:02 PM
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:
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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:
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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:
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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_
uri` should be the URI to the root of your Delta Lake in the S3 or MinIO bucket. For MinIO, the
endpoint
in
storage_options
should point to your MinIO instance. Please note that the code examples provided are based on the documentation and should be adapted to your specific use case and environment.
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