apache/airflow

Support Serialized DAGs on CLI Commands

Open

#15,306 opened on Apr 9, 2021

View on GitHub
 (8 comments) (0 reactions) (0 assignees)Python (16,781 forks)batch import
area:CLIgood first issuekind:featurepriority:low

Repository metrics

Stars
 (44,809 stars)
PR merge metrics
 (Avg merge 7d 18h) (834 merged PRs in 30d)

Description

Description

CLI commands such as backfill and list_dags currently parse dags before executing. This introduces 2 primary issues. 1) That parse process can be time consuming, and 2) It will not work if running on a web server that does not have access to DAGs and/or their respective Python libraries or Airflow plugins.

Use case / motivation

By providing users an option to use serialized DAGs with the Airflow CLI, users can opt for the more efficient method of executing commands based on the information available in the metadatabase rather than relying solely on parsing the source DAGs.

Are you willing to submit a PR?

Yes

Related Issues

No

Contributor guide

Research direction
Study how serialized DAGs are used in the Airflow web UI (e.g., in the REST API and UI views). Identify the metadatabase queries and serialization/deserialization logic. Then, in the CLI code (e.g., backfill, list dags commands), add an option to use serialized DAGs by calling the appropriate services instead of parsing source DAG files.
Tech stack
python
Domain
backendcli
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
AirflowCLISerialized DAGs
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55