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Delta-Kusto
Delta-Kusto is a Command-line interface (CLI) enabling Continuous Integration / Continuous Deployment (CI / CD) automation with Kusto objects (e.g. tables, functions, policies, security roles, etc.) in Azure Data Explorer (ADX) databases. It can work on a single database, multiple databases, or an entire cluster. It also supports multi-tenant scenarios.
Delta-Kusto is doing what SQL Database projects do for Microsoft SQL: enabling CI/CD, change management and source control of Kusto databases. It works with and produces Kusto scripts so it doesn't require a new language / serialization format and can therefore be used with other tools of the ADX ecosystem.
Delta-Kusto runs on Linux, Mac OS & Windows as a stand-alone executable. It is meant to be used in headless mode.
Delta-Kusto works on database structure, not data:
- Functions
- Tables / Columns
- Ingestion Mapping
- Policies
- Materialized Views
- Security roles
- External tables
- Continuous Export
Documentations
See the documentation for details and tutorial section for different tutorials on Delta-Kusto.
Overview
The high-level view of delta-kusto is the following:
The green boxes (current and target) represent sources. A source can be:
- ADX Database
- Kusto script
Delta-Kusto computes the delta between the two sources. The delta is a Kusto script containing the kusto commands required to take the current source and bring it to target source. The delta script can be exported as a stand alone file or as a folder hierarchy of scripts for easier readability and git-diff. It can also be applied to the current ADX Database.
Human validation often are required, especially if .drop commands are issued (to prevent unwanted data lost).
Scenarios / Flows
Using different combinations of sources can enable different scenarios:
| Current | Target | Scenario | Description |
|---|---|---|---|
| ADX Database | Kusto scripts | CI / CD scenario | Push the state if a script set to an ADX database. |
| Kusto scripts | ADX Database | Determine gap between a script set and existing DB | Computed Delta script shows what would need to be added to the script set to obtain the state of the target database. |
| Empty | ADX Database | Reverse engineer a database | Special case of the previous scenario. The delta becomes the entire state of the target. |
| Kusto scripts | Kusto scripts | Offline sync | Compute a delta between two script sets. No live databases needed. |
| ADX Database | Kusto scripts | Live Sync | Find gap between two databases. |
Limitations
The current release of Delta-Kusto includes functions, tables, ingestion mappings & the following policies:
- Auto Delete
- Caching
- Ingestion Batching
- Merge
- Retention
- Sharding
- Update
See the list of issues for details on upcoming features and bugs found.
Alternatives
- Sync Kusto - The Sync Kusto tool was built to help create a maintainable development process around Kusto.
- Azure DevOps Task for Azure Data Explorer - Azure Pipelines task that enables you to create release pipelines and deploy your database changes to your Azure Data Explorer databases.