Paul Herzog
02/22/2024, 2:29 PMScout
02/22/2024, 2:29 PMGCSResource
and GCSPickleIOManager
for interacting with GCS. These abstractions help you manage connections and interactions with GCS in a clean and reusable way. 2. Configuration: Configure your GCS resources and IO managers with the necessary parameters such as project
, gcs_bucket
, and gcs_prefix
. This ensures that your assets and operations know where to store and retrieve data. 3. Client Management: When defining an asset that interacts with GCS, use the GCSResource
to obtain a client. This client is a google.cloud.storage.Client
object that you can use to interact with GCS. For example: python @asset def my_asset(gcs: GCSResource): with gcs.get_client() as client: # client is a google.cloud.storage.Client ...
4. Serialization: The GCSPickleIOManager
serializes objects via pickling, which is suitable for object storage for distributed executors. Ensure that your data types are pickleable. 5. File Path Management: The IO manager assigns each op output to a unique filepath containing run ID, step key, and output name. It also assigns each asset to a single filesystem path. Be mindful of how your file paths are constructed to avoid conflicts and ensure data is stored and retrieved correctly. 6. Credentials Management: If you cannot upload a file to your Dagster deployment or authenticate with GCP via a standard method, you can provide a service account key as the gcp_credentials
configuration. This key must be base64 encoded to avoid issues with newlines in the keys. 7. Cold Storage: If you are dealing with infrequently accessed data, consider using cold storage options like Google Cloud Storage Nearline for cost savings. 8. Data Archiving: For long-term data retention, use cloud providers like GCP to transfer and store data securely in their cloud infrastructure. 9. Security: Always ensure that your GCP credentials are handled securely and follow best practices for managing sensitive information. 10. Testing: Test your GCS interactions in a development environment before deploying to production to ensure that everything works as expected. By following these best practices, you can effectively use Google Cloud Storage within your Dagster pipelines to manage data storage and retrieval.Paul Herzog
02/22/2024, 2:32 PMScout
02/22/2024, 2:32 PMGCSPickleIOManager
as a resource in a Dagster job, based on the documentation: First, you need to define the resource configuration for GCSPickleIOManager
. This includes specifying the GCS bucket and optional prefix where the data will be stored: python from dagster import job from dagster_gcp.gcs import GCSPickleIOManager, GCSResource @job( resource_defs={ "io_manager": GCSPickleIOManager( gcs=GCSResource(project="my-cool-project"), gcs_bucket="my-cool-bucket", gcs_prefix="my-cool-prefix" ), } ) def my_job(): ...
In this example, GCSPickleIOManager
is used as the io_manager
resource for the job my_job
. It is configured with a GCSResource
that specifies the GCP project name, and the GCSPickleIOManager
itself is configured with the GCS bucket and prefix. When you run my_job
, any outputs from the operations within that job will be automatically managed by the GCSPickleIOManager
, which will serialize the outputs using pickle and store them in the specified GCS bucket with the given prefix. Remember to replace "my-cool-project"
, "my-cool-bucket"
, and "my-cool-prefix"
with your actual GCP project ID, GCS bucket name, and desired prefix for your use case.Paul Herzog
02/22/2024, 2:42 PMScout
02/22/2024, 2:42 PM@asset
decorator or by passing them as arguments to the decorated function, but not both. The @asset
decorator in your code snippet is attempting to define an io_manager
resource, while the function upload_by_url_data_to_gcs
is also expecting a google_cloud_storage
resource as an argument. This is what's causing the conflict. To resolve this issue, you should define the resources in one place. If you want to use the io_manager
within the asset, you should not pass it as an argument to the function. Instead, you can access it via the context
object that is automatically passed to the asset function. Here's how you can modify your asset definition to avoid the error: python from dagster import asset, AssetIn, AssetExecutionContext from dagster_gcp.gcs import GCSPickleIOManager, GCSResource @asset(ins={"by_url_data": AssetIn(key=AssetKey("by_url_data"))}) def upload_by_url_data_to_gcs(context: AssetExecutionContext, by_url_data): # Access the GCSResource from the context google_cloud_storage = context.resources.gcs # Use the GCS client without the context manager, based on the issue you mentioned client = google_cloud_storage.get_client() print(client) # ... rest of your code to upload data to GCS
And then, when you define your job or repository, you can specify the resource definitions there: python from dagster import job, repository @job(resource_defs={ "gcs": GCSResource(project=f"{project_id}"), "io_manager": GCSPickleIOManager( gcs_bucket=f"{project_id}-accuranker-orchestration-test", gcs_prefix="first_time_test_prefix_gcs_resource" ), }) def my_job(): upload_by_url_data_to_gcs() @repository def my_repo(): return [my_job]
In this revised code, the GCSResource
is defined as a resource with the key "gcs"
in the job's resource_defs
. The asset function upload_by_url_data_to_gcs
can then access this resource via context.resources.gcs
. Please ensure that you replace project_id
with your actual GCP project ID and adjust the bucket name and prefix as needed. Also, make sure that the GCSPickleIOManager
is correctly configured in the job's resource definitions.Paul Herzog
02/22/2024, 2:47 PMScout
02/22/2024, 2:47 PMio_manager
in the Definitions
in your __init__.py
file. However, when you want to pass individual variables to the GCS prefix or any other configuration, you would typically use the Dagster configuration system to inject these values at runtime.
Here's an example of how you might set up your Definitions
with a GCSPickleIOManager
and how to pass a dynamic GCS prefix using the configuration system:
python
# __init__.py
from dagster import Definitions, asset, Field, String
from dagster_gcp.gcs import GCSPickleIOManager, GCSResource
# Define your GCS IO Manager with configuration for the GCS prefix
gcs_io_manager = GCSPickleIOManager.configured({
"gcs_bucket": "my-cool-bucket",
"gcs_prefix": Field(String, is_required=False, default_value="default_prefix"),
})
# Define your Definitions with the GCS IO Manager
defs = Definitions(
resources={
"io_manager": gcs_io_manager,
"gcs": GCSResource(project="my-cool-project"),
},
)
# Define your asset
@asset(required_resource_keys={"io_manager", "gcs"})
def my_asset(context):
# Access the GCS client from the context
gcs_client = context.resources.gcs.get_client()
bucket = gcs_client.bucket("my-cool-bucket")
# Prepare your data to upload
data_to_upload = "my data"
# Create a blob in the bucket
blob = bucket.blob(f"{context.resources.io_manager.gcs_prefix}/my_file.txt")
# Upload the data to the blob
blob.upload_from_string(data_to_upload)
# Return something or perform other operations as needed
return "Data uploaded"
When you run your job, you can provide a configuration for the gcs_prefix
like so:
yaml
# config.yaml
resources:
io_manager:
config:
gcs_prefix: "dynamic_prefix_for_this_run"
And then execute your job with the configuration file:
bash
dagster job execute -f __init__.py -c config.yaml
This will use the dynamic_prefix_for_this_run
as the GCS prefix for this particular execution.
Please note that the GCSPickleIOManager
is a resource that needs to be configured with the GCS bucket and optional prefix. The GCSResource
is a separate resource that provides a GCS client and needs to be configured with your GCP project ID. Both resources should be included in your Definitions
if they are required by your assets or operations. Passing arbitrary Python objects to `Con... button I/O managers | Dagster button Tutorial, part six: Using Dagster to sav... button Pushing REST-API data to Google Sheets w... button Thank you for your feedback!Paul Herzog
02/22/2024, 3:25 PMScout
02/22/2024, 3:25 PMgoogle.cloud.bigquery
library, which provides a method load_table_from_dataframe
that allows you to load data from a pandas DataFrame into a BigQuery table. Here's an example of how you might do this within a Dagster asset: python import pandas as pd from dagster import asset from dagster_gcp import BigQueryResource from google.cloud import bigquery # Define your asset @asset(required_resource_keys={"bigquery"}) def my_asset(context, df: pd.DataFrame): # Access the BigQuery client from the context bigquery_client = context.resources.bigquery.get_client() # Define your BigQuery table and dataset dataset_name = 'my_dataset' table_name = 'my_table' table_id = f'{bigquery_client.project}.{dataset_name}.{table_name}' # Configure the job to append data to the destination table if it already exists job_config = bigquery.LoadJobConfig( schema=[ # Define your schema here if needed, or set to None to autodetect # bigquery.SchemaField("name", "STRING"), # bigquery.SchemaField("age", "INTEGER"), ], write_disposition=bigquery.WriteDisposition.WRITE_APPEND, ) # Load the DataFrame into BigQuery job = bigquery_client.load_table_from_dataframe( dataframe=df, destination=table_id, job_config=job_config ) # Wait for the load job to complete job.result() <http://context.log.info|context.log.info>(f"Loaded {job.output_rows} rows into {table_id}") return "Data appended to BigQuery table"
In this example, the my_asset
asset function takes a pandas DataFrame df
as input and appends it to a BigQuery table specified by dataset_name
and table_name
. The BigQueryResource
is used to get the BigQuery client, which is then used to load the DataFrame into BigQuery. The job_config
is set up with write_disposition=bigquery.WriteDisposition.WRITE_APPEND
, which specifies that the data should be appended to the table if it already exists. If the table does not exist, BigQuery will attempt to create it based on the schema defined in the DataFrame. To use this asset, you would define a job that includes it and provide the necessary configuration for the bigquery
resource, including credentials and project information. Remember to replace 'my_dataset'
and 'my_table'
with your actual dataset and table names, and define the schema if you do not want BigQuery to autodetect it. Please note that this example assumes you have already installed the google-cloud-bigquery
package and have the necessary permissions to access the BigQuery dataset and table.Paul Herzog
02/22/2024, 3:53 PMScout
02/22/2024, 3:53 PMAttributeError: '_GeneratorContextManager' object has no attribute 'load_table_from_dataframe'
, suggests that the client_bq
object you're trying to call load_table_from_dataframe
on is not an instance of google.cloud.bigquery.Client
but rather a context manager that wraps around the client.
In Dagster, when you use bigquery.get_client()
as a context manager with the with
statement, it will manage the lifecycle of the client for you, including closing the client once the block of code is exited. However, if you're using it without the with
statement, you need to explicitly call __enter__()
to enter the context manager and obtain the client.
Here's how you can modify your function to use the BigQuery client correctly:
python
from dagster import asset
from dagster_gcp import BigQueryResource, GCSResource
@asset(required_resource_keys={"bigquery", "gcs"})
def by_url_data_to_bq(context, upload_by_url_data_to_gcs: tuple):
bucket_name, blob_name = upload_by_url_data_to_gcs
bq_data_set = "your_dataset"
bq_table_name = "your_table"
# Get the BigQuery client
client_bq = context.resources.bigquery.get_client()
# Get the GCS client
client_gcs = context.resources.gcs.get_client()
# Assuming you want to load data from GCS to BigQuery
# Create a BigQuery job config
job_config = bigquery.LoadJobConfig(
source_format=bigquery.SourceFormat.NEWLINE_DELIMITED_JSON,
autodetect=True,
write_disposition=bigquery.WriteDisposition.WRITE_APPEND,
)
# Get the URI for the GCS object
uri = f"gs://{bucket_name}/{blob_name}"
# Start the load job
load_job = client_bq.load_table_from_uri(
uri,
f"{bq_data_set}.{bq_table_name}",
job_config=job_config
)
# Wait for the job to complete
load_job.result()
<http://context.log.info|context.log.info>(f"Loaded data from {uri} into {bq_data_set}.{bq_table_name}")
In this revised function, I've made the following changes:
1. Used the @asset
decorator to define the asset and specified the required resource keys.
2. Removed the dataframe
parameter from the load_table_from_dataframe
method since it seems you want to load data from GCS, not a DataFrame. Instead, I used load_table_from_uri
to load data directly from a GCS URI.
3. Added a job_config
to specify the source format and other loading options. You'll need to adjust the source_format
and other configurations based on your actual data format and requirements.
4. Used load_table_from_uri
to start a load job that loads data from the GCS URI into the BigQuery table.
Please ensure that you replace "your_dataset"
and "your_table"
with your actual dataset and table names, and adjust the job_config
as needed based on yoScout
02/22/2024, 3:54 PMgoogle-cloud-bigquery
and dagster-gcp
) and configure your resources with the appropriate credentials and project information.Paul Herzog
02/22/2024, 4:00 PMScout
02/22/2024, 4:00 PMwith
statement, you can follow the best practices outlined in the documentation. Here's an example of how you might do this within a Dagster asset: python from dagster import asset, Field, String, get_dagster_logger from dagster_gcp.bigquery.resources import bigquery_resource from google.cloud import bigquery # Define your asset @asset(required_resource_keys={"bigquery"}) def upload_from_uri_to_bigquery(context, gcs_uri: str, dataset_id: str, table_id: str): logger = get_dagster_logger() # Get the BigQuery client from the context with context.resources.bigquery.get_client() as client_bq: # Define the destination table reference table_ref = f"{client_bq.project}.{dataset_id}.{table_id}" # Create a job configuration job_config = bigquery.LoadJobConfig( source_format=bigquery.SourceFormat.NEWLINE_DELIMITED_JSON, autodetect=True, write_disposition=bigquery.WriteDisposition.WRITE_APPEND, ) # Start the load job load_job = client_bq.load_table_from_uri( source_uris=gcs_uri, destination=table_ref, job_config=job_config ) # Wait for the job to complete load_job.result() <http://logger.info|logger.info>(f"Loaded data from {gcs_uri} into {table_ref}")
In this example, the upload_from_uri_to_bigquery
asset function takes a GCS URI gcs_uri
, a dataset ID dataset_id
, and a table ID table_id
as inputs. It uses the bigquery_resource
to get the BigQuery client and then uploads the data from the GCS URI to the specified BigQuery table. The job_config
is set up with source_format=bigquery.SourceFormat.NEWLINE_DELIMITED_JSON
and write_disposition=bigquery.WriteDisposition.WRITE_APPEND
, which specifies that the data should be appended to the table if it already exists. You should adjust the source_format
based on the format of your data in GCS. To use this asset, you would define a job that includes it and provide the necessary configuration for the bigquery
resource, including credentials and project information. Remember to replace the gcs_uri
, dataset_id
, and table_id
with your actual GCS URI, dataset name, and table name, respectively. Also, ensure that the job_config
is correctly configured based on your data format and requirements. Please note that this example assumes you have already installed the google-cloud-bigquery
package and have the necessary permissions to access the BigQuery dataset and table.