- Зачем:
- урок 4 должен показывать не только измерение сирот в DDS, но и остановку Airflow DAG при нарушении связи dds.event -> dds.click.
- Что:
- добавлен assert_dds_integrity в etl_pipeline и документация управляемого красного сценария.
- вынесены общие helper'ы для SQL-split и boolean-параметров Airflow.
- добавлен урок 4 и обновлены навигация курса, план обучения и operations notes.
- Проверка:
- python3 -m py_compile airflow/dags/etl_pipeline_dag.py airflow/dags/ddl_init_dag.py airflow/dags/kafka_load_dag.py airflow/dags/utils/airflow_params.py airflow/dags/utils/sql_helpers.py.
- docker compose exec -T airflow-webserver airflow dags test etl_pipeline 2026-06-05T18:00:00 -c '{"full_refresh": true}'.
- Why:
- keep Airflow artifacts under a single airflow/ directory
- align repository layout with intended project structure
- What:
- move dags/ to airflow/dags/ and update compose mounts
- make SQL root resolution work in container and local runs
- update DAG path references in README, AGENTS, ARCHITECTURE, and plans
- remove tracked Python cache artifacts from old DAG location
- Check:
- airflow dags list
- airflow dags list-import-errors
- e2e success: ddl_init, kafka_load(limit=50), etl_pipeline
Add comprehensive DAG implementation for ClickHouse schema initialization
and ETL pipeline orchestration. The ddl_init_dag manages database schema
creation across stg/ods/dds/dm layers with verification capabilities. The
etl_pipeline_dag implements full ODS to DDS to DM transformation flow with
data quality checks, branching logic for full/incremental loads, and
timeout handling for data availability.
Additional changes:
- Upgrade Airflow from 2.9.3 to 2.10.5
- Fix ClickHouse connection to use native protocol port 9000
- Mount SQL directory in docker-compose for DAG execution
- Update project requirements and documentation comments
- Remove unused pandas dependency
Update Airflow configuration to integrate with ClickHouse DWH instead of
PostgreSQL training database. Changes include:
- Switch Airflow dependencies from PostgreSQL to ClickHouse connector
- Update docker-compose to use ClickHouse connection and correct Dockerfile
- Refactor airflow/requirements.txt to include only essential packages
- Add DAGs directory for ETL pipeline orchestration
- Update documentation to reflect Airflow integration and access credentials
- Adjust service dependencies to wait for ClickHouse startup
Add Apache Airflow infrastructure with webserver, scheduler, and metadata
database to enable DAG-based pipeline orchestration. Includes optimized
requirements file and Docker configuration for Airflow 2.9.3.
ddadmin