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About Collectors

Collectors are extractors that are developed and managed by you (A customer of K).

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1. Deploying and orchestrating the extract code

2. Managing a high water mark so the extract only pull the latest metadata

3. Storing and pushing the extracts to your K instance.

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Pre-requisites

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Collector Server Minimum Requirements

SSIS Requirements

MSDB database / SQLServer DB access

• We currently only support SSIS package deployments to the MSDB database and not project deployments which deploy to SSISDB database, please advise KADA if you use project deployments against SSISDB

  if using SSISDB to store package you will need to download each project via SQL Server Management Studio. See https://kadaai.atlassian.net/wiki/spaces/KSL/pages/1960706049/SSIS+Collector+method+-+v3.1.0#Downloading-SSISDB-packages

  • The collector will need access to the underlying SQLServer Database with permissions to read the following tables is the SSIS main databases:

    • MSDB.DBO.SYSSSISPACKAGES

    • <SSIS Logging Database>.DBO.SYSSSISLOG where <SSIS Logging Database> is the database configured for SSIS logging

• Access to K landing directory

• Access to the KADA Collector repository that contains the SSIS whl

• The repository is currently hosted in KADA’s Azure Blob Storage. You will be given a SAS token to access the repository. Reach out to KADA Support (support@kada.ai) if you do not have access.

Download the SSIS whl (e.g. kada_collectors_extractors_ssis-#.#.#-py3-none-any.whl)

Check your SSIS instance port

• Run the following query and note the local tcp port.

  Code Block
  SELECT local_tcp_port FROM sys.dm_exec_connections WHERE session_id = @@SPID GO

Downloading SSISDB packages

1. In SQL Server Studio Manager Go to Integration Services Catalog > Projects.

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2. Right click on a Project > Export…
   

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3. Save project file

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4. Change the file extraction from .ispac to .zip

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5. Repeat for each project.

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Step 1: Create the Source in K

Create a SSIS source in K

• Go to Settings, Select Sources and click Add Source

• Select “Load from file system” option
  

  

• Give the source a Name - e.g. SSIS Production

• Add the Host name for the SSIS Server

• Click Finish Setup

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Step 2: Getting Access to the Source Landing Directory

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Step 3: Install the Collector

It is recommended to use a python environment such as pyenv or pipenv if you are not intending to install this package at the system level.

Some python packages also have dependencies on the OS level packages, so you may be required to install additional OS packages if the below fails to install.install.

You can download the latest Core Library and whl via Platform Settings → Sources → Download Collectors

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Run the following command to install the collector

pip install kada_collectors_extractors_ssis-3.1.0-py3<version>-none-any.whl

You will also need to install the common library kada_collectors_lib -1.0.0 for this collector to function properly.

pip install kada_collectors_lib-1.0.0-py3<version>-none-any.whl

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Step 4: Configure the Collector

The collector requires a set of parameters to connect to and extract metadata from SSIS.

{
        "myDSN": {
            "host": "myhost",
            "database": "mydatabase"
        }
    }

These parameters can be added directly into the run or you can use pass the parameters in via a JSON file. The following is an example you can use that is included in the example run code below.

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{
    "server": "",
    "username": "",
    "password": "",
    "logging_database": "ssis_logging",
    "mapping": {},
    "driver": "ODBC Driver 17 for SQL Server",
    "output_path": "/tmp/output",
    "input_path": "/tmp/input",
    "mask": true,
    "compress": true,
    "uses_ssisdb": false,
    "meta_only": false
}

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Step 5: Run the Collector

The following code is an example of how to run the extractor. You may need to uplift this code to meet any code standards at your organisation.

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import os
import argparse
from kada_collectors.extractors.utils import load_config, get_hwm, publish_hwm, get_generic_logger
from kada_collectors.extractors.ssis import Extractor

get_generic_logger('root') # Set to use the root logger, you can change the context accordingly or define your own logger

_type = 'ssis'
dirname = os.path.dirname(__file__)
filename = os.path.join(dirname, 'kada_{}_extractor_config.json'.format(_type))

parser = argparse.ArgumentParser(description='KADA SSIS Extractor.')
parser.add_argument('--config', '-c', dest='config', default=filename, help='Location of the configuration json, default is the config json in the same directory as the script json in the same directory as the script.')
parser.add_argument('--name', '-n', dest='name', default=_type, help='Name of the collector instance.')
args = parser.parse_args()

start_hwm, end_hwm = get_hwm(_typeargs.name)

ext = Extractor(**load_config(args.config))
ext.test_connection()
ext.run(**{"start_hwm": start_hwm, "end_hwm": end_hwm})

publish_hwm(_type, end_hwm)

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username: username to sign into sqlserver
password: password to sign into sqlserver
server: sqlserver host
driver: sqlserver driver name
logging_database: Logging Database name for SSIS
mapping: Dict of DNS to database and hostnames
output_path: full or relative path to where the outputs should go
input_path: full or relative path to where the dstx files should be
mask: To mask the META/DATABASE_LOG files or not
compress: To gzip output files or not
uses_ssisdb: Are packages published to ssisdb or msdb?
meta_only: Option to extract metadata only

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Step 6: Check the Collector Outputs

K Extracts

A set of files (eg metadata, databaselog, linkages, events etc) will be generated. These files will appear in the output_path directory you set in the configuration details

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A high water mark file is created in the same directory as the execution called ssis_hwm.txt and produce files according to the configuration JSON. This file is only produced if you call the publish_hwm method. https://kadaai.atlassian.net/wiki/spaces/KSL/pages/1902411777/Additional+Notes#Storing-the-HWM-using-the-K-Landing-Area

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Step 7: Push the Extracts to K

Once the files have been validated, you can push the files to the K landing directory.

You can use Azure Storage Explorer if you want to initially do this manually. You can push the files using python as well (see Airflow example below)

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Example: Using Airflow to orchestrate the Extract and Push to K

# built-in
import os

# Installed
from airflow.operators.python_operator import PythonOperator
from airflow.models.dag import DAG
from airflow.operators.dummy import DummyOperator
from airflow.utils.dates import days_ago
from airflow.utils.task_group import TaskGroup

from plugins.utils.azure_blob_storage import AzureBlobStorage

from kada_collectors.extractors.utils import load_config, get_hwm, publish_hwm, get_generic_logger
from kada_collectors.extractors.tableau import Extractor

# To be configed by the customer.
# Note variables may change if using a different object store.
KADA_SAS_TOKEN = os.getenv("KADA_SAS_TOKEN")
KADA_CONTAINER = ""
KADA_STORAGE_ACCOUNT = ""
KADA_LANDING_PATH = "lz/tableau/landing"
KADA_EXTRACTOR_CONFIG = {
    "server_address": "http://tabserver",
    "username": "user",
    "password": "password",
    "sites": [],
    "db_host": "tabserver",
    "db_username": "repo_user",
    "db_password": "repo_password",
    "db_port": 8060,
    "db_name": "workgroup",
    "meta_only": False,
    "retries": 5,
    "dry_run": False,
    "output_path": "/set/to/output/path",
    "mask": True,
    "mapping": {}
}

# To be implemented by the customer. 
# Upload to your landing zone storage.
def upload():
  output = KADA_EXTRACTOR_CONFIG['output_path']
  for filename in os.listdir(output):
      if filename.endswith('.csv'):
        file_to_upload_path = os.path.join(output, filename)

        AzureBlobStorage.upload_file_sas_token(
            client=KADA_SAS_TOKEN,
            storage_account=KADA_STORAGE_ACCOUNT,
            container=KADA_CONTAINER, 
            blob=f'{KADA_LANDING_PATH}/{filename}', 
            local_path=file_to_upload_path
        )

with DAG(dag_id="taskgroup_example", start_date=days_ago(1)) as dag:
  
    # To be implemented by the customer.
    # Retrieve the timestamp from the prior run
    start_hwm = 'YYYY-MM-DD HH:mm:SS'
    end_hwm = 'YYYY-MM-DD HH:mm:SS' # timestamp now
    
    ext = Extractor(**KADA_EXTRACTOR_CONFIG)
    
    start = DummyOperator(task_id="start")

    with TaskGroup("taskgroup_1", tooltip="extract tableau and upload") as extract_upload:
        task_1 = PythonOperator(
            task_id="extract_tableau",
            python_callable=ext.run, 
            op_kwargs={"start_hwm": start_hwm, "end_hwm": end_hwm},
            provide_context=True,
        )
        
        task_2 = PythonOperator(
            task_id="upload_extracts",
            python_callable=upload, 
            op_kwargs={},
            provide_context=True,
        )

        # To be implemented by the customer. 
        # Timestamp needs to be saved for next run
        task_3 = DummyOperator(task_id='save_hwm') 

    end = DummyOperator(task_id='end')

    start >> extract_upload >> end

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