The Dagster UI is a web-based interface for viewing and interacting with Dagster objects.
You can inspect Dagster objects (ex: assets, jobs, schedules), launch runs, view launched runs, and view assets produced by those runs.
The easiest way to launch the UI from the command line during local development is to run:
This command launches both the Dagster webserver (which serves the UI) and the Dagster daemon, allowing you to start a full local deployment of Dagster from the command line.
The command will print out the URL you can access the UI from in the browser, usually on port 3000.
When invoked, the UI will fetch definitions - such as assets, jobs, schedules, sensors, and resources - from a
Definitions object in a Python module or package or the code locations configured in an open source deployment's workspace files. Refer to the Code location documentation for more info.
You can also launch the webserver by itself from the command line by running:
Note that several Dagster features, like schedules and sensors, require the Dagster daemon to be running in order to function.
Description: This page, also known as the "factory floor", provides a high-level look at the activity in your Dagster deployment, across all code locations. This includes information about runs, jobs, schedules, sensors, resources, and backfills, all of which can be accessed using the tabs on this page.
Accessed by: Clicking Overview in the top navigation bar
Description: The Asset catalog page lists all assets in your Dagster deployment, which can be filtered by asset key and/or asset group. Clicking an asset opens the Asset details page for that asset. You can also navigate to the Global asset lineage page, reload definitions, and materialize assets.
Accessed by: Clicking Assets in the top navigation bar
Description: The Sensors page lists all sensors defined in your Dagster deployment, as well as information about the sensor's frequency and its last tick. Click a sensor to view details about the sensor, including its recent tick history and recent runs.
Accessed by: Clicking Overview (top nav) > Sensors tab
Description: The Backfills tab contains information about the backfills in your Dagster deployment, across all code locations. It includes information about when the partition was created, its target, status, run status, and more.
Accessed by: Clicking Overview (top nav) > Backfills tab
Description: The Jobs page lists all jobs defined in your Dagster deployment across all code locations. It includes information about the job's schedule or sensor, its latest run time, and its history. Click a job to open the Job details page.
Accessed by: Clicking Overview (top nav) > Jobs tab
The Deployment page includes information about the status of the code locations in your Dagster deployment, daemon (Open Source) or agent (Cloud) health, schedules, sensors, and configuration details.
Description: The Code locations tab contains information about the code locations in your Dagster deployment, including their current status, when they were last updated, and high-level details about the definitions they contain. You can reload Dagster definitions by: