The KustoTrender JavaScript SDK is a JavaScript library for Microsoft Azure Data Explorer, featuring components for data visualization and analytics, utilities for making calls directly to the KQL Cluster, and more. KustoTrender also ships with an associated CSS file (which you must include using your preferred css linking method), which makes the components look great out of the box.
If you use npm, npm install azure-kusto-trender.
To import all of KustoTrender into an ES2015 application, import everything into a namespace, like so:
import KustoTrender from "azure-kusto-trender";
// later, when you want a line chart
let kustoTrender = new KustoTrender();
let lineChart = new kustoTrender.ux.LineChart(document.getElementById('chart'));You can also import components individually. If you only need the LineChart, you can import it like so...
import LineChart from 'azure-kusto-trender/LineChart'
// later when you want a line chart
let lineChart = new LineChart(document.getElementById('chart'));Importing individual components can help significantly reduce your bundle size as they work better with tree shaking. This is the recommended approach if your app only consumes specific components.
To import the kustotrender stylesheet into an ES2015 application, import either kustotrender.css or kustotrender.min.css, like so...
import 'azure-kusto-trender/kustotrender.css' // Standard styles
import 'azure-kusto-trender/kustotrender.min.css' // Minified stylesA Kusto-Trender experience (Example 1, Example 2) relies on the following fundamental items:
- An Azure Active Directory App
- A Kusto cluster
- Schema & stored functions deployed on the cluster
- Optional: Sample data / data pipeline
This section covers the steps you need to take in order to run the Kusto-Trender on your Kusto environment.
- Create an Azure Application
- Create a Kusto environment
- Create the schema
- Optional: Deploy sample data
- Optional: Adapt to your data
If your Trender needs to access Kusto using the credentials of the calling user, configure delegated permissions for your application registration. Please follow the following documentation:
- Create an Azure Active Directory application. It's not needed to create any certificate or secret.
- Configure delegated permissions for the application registration.
- Optional: grant admin consent for the permissions of the app you created.
Kusto is available in many incarnations nowadays:
All of them are compatible with Kusto Trender. The one that does not come with any cost is MyFreeCluster. You'll be able to create a new cluster for you in seconds.
Once you have a working Kusto, you want to deploy the schema. You can find the schema that fuels the examples here. It's a small script which creates a couple of tables and functions. Just execute it in the scope of the database you like to use.
The following tables are created by the script.
The raw timeseries data. The TimeseriesId column represents an unique identifier for a timeseries (some call it "tag").
Timeseries
| take 3| TimeseriesId | Timestamp | Value |
|---|---|---|
| 939d52f1-cba7-48bb-87cb-d8e5d9050a73 | 2017-05-01 00:00:00.0000000 | 0,321766886722178 |
| 011523e8-5ab6-46ec-9a50-4ac3a6488f8c | 2017-05-01 00:00:00.0000000 | 0,00480370965876755 |
| bddbab16-fab5-4d59-8353-f35b58866e53 | 2017-05-01 00:00:00.0000000 | 0,84581159990962 |
The metadata for the timeseries including name, description and other columns.
TimeseriesMetadata
| take 3| TimeseriesId | TimeseriesName | Description | EngUnits | DataStreamTags |
|---|---|---|---|---|
| 9fe3d2cc-6395-4f01-943a-64bcfafc2f90 | vibration-1 | A vibration sensor | Hz | [] |
| e8f32758-ad81-4471-8e4d-62eefa74f314 | vibration-2 | A vibration sensor | Hz | [] |
| 34994e72-205e-4288-a0e4-5b0a615f2c0d | vibration-3 | A vibration sensor | Hz | [] |
The hierarchy of the timeseries. In many scenarios the timeseries (aka tags) are organized in a hierarchy. The functions created in the last step allow browsing of that hierarchy. The Path is created as an array of path elements. The top level element is considered to be the name of the hierarchy. The remaining elements are considered to be the structural vertices of the hierarchy.
TimeseriesHierarchy
| take 3| TimeseriesId | DisplayName | Path |
|---|---|---|
| 687f97ef-268e-4daf-932c-181f793d0e59 | vibration-10 | [ "Contoso Plant 1", "Factory1", "Line1", "Station3" ] |
| e1168559-15d5-4fc7-bf2c-4b773e4f8d1b | temp control rate-42 | [ "Contoso Plant 1", "Factory1", "Line1", "Station3" ] |
| 283eebcb-d267-4a76-8179-a9b33fb87cf2 | temperature-16 | [ "Contoso Plant 1", "Factory1", "Line1", "Station3" ] |
In order to deploy the sample data you need to execute the script.
This section is relevant if you collect data and store it in a different schema then they one supported by the sample scenarios. There are multiple ways on how to proceed.
- You can create a lightweight ETL pipeline inside of Kusto using Update Policies.
- A full blown ETL process before you ingest data into Kusto. There are tons of tools available.
- Instead of rolling out the schema in the samples you could create views (stored functions without parameters) in Kusto which mimic the schema. The functions of the schema ddl file would still work.
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