- Why:
- align interview demo with recruiter requirement for 10-15 minutes
- What:
- add timed walkthrough with code, architecture and verification points
- include fallback steps for UI issues and final speaking script
- Check:
- verify paths/commands against repository files and DAG ids
- Why:
- Superset bootstrap used outdated ClickHouse URI format and did not fail fast on init errors.
- docs and exported dashboard metadata diverged from runtime connection settings.
- What:
- build ClickHouse URI from env vars and use clickhousedb:// in init script.
- refresh dataset metadata on existing datasets and surface import errors.
- run create_dashboard during superset-init startup and align docs/exported URI references.
- ignore node_modules in git.
- Check:
- python3 -m py_compile superset/init_superset.py
- manual dashboard smoke check in UI (charts render)
- Why:
- dashboard tiles failed with "Item with key 'echarts_bar' is not registered".
- existing slice query_context stayed stale after config updates.
- What:
- switch Top Pages and Data Quality Summary from \'echarts_bar\' to \'dist_bar\'.
- use \'groupby\' for categorical bar charts and sync this into query_context.
- keep dashboard export config aligned with runtime chart definitions.
- Check:
- python3 -m py_compile superset/create_dashboard.py
- docker compose exec -T superset python /app/superset_init/create_dashboard.py
- DB check for slices 9/10: viz_type=form_data=query_context set to dist_bar
- Добавлена автоматическая инициализация Superset (подключение ClickHouse, 6 датасетов, 10 чартов, дашборд)
- Переведено хранение метаданных с SQLite на PostgreSQL (shared с Airflow)
- Добавлен superset_config.py для конфигурации PostgreSQL
- Обновлен Dockerfile.superset: postgresql-client, psycopg2-binary
- Обновлен docker-compose.yml: volume mount конфига, SUPERSET_CONFIG_PATH
- Исправлены скрипты init_superset.py и create_dashboard.py для работы с shell
- Обновлена документация в README.md: раздел Superset с инструкциями
Тестирование:
- Проверена работа после перезапуска (данные сохраняются)
- Проверен чистый запуск с нуля
- API и UI доступны
- Исправлен путь Kafka volume с /tmp/kraft-combined-logs на /var/lib/kafka/data
(решена проблема с правами доступа при старте Kafka)
- Обновлен superset/init_superset.py: улучшена обработка ошибок SQLite
- Обновлен superset/create_dashboard.py: оптимизирован импорт модулей
- Why:
- give a student a short, repeatable interview demo script
- What:
- add 5-minute timeline with speaking prompts
- add SQL/CLI commands and fallback plan for UI issues
- Check:
- review markdown content in docs/DEMO_CHEATSHEET_5MIN.md
- Why:
- formalize complete end-to-end verification for the demo DWH stack
- provide fast regression checks and full validation before demo/release
- What:
- add new TEST_PLAN.md with two execution contours: Smoke and Full
- include checks for infra bootstrap, Airflow DAG flow, STG/ODS/DDS/DM data quality, monitoring and alert provisioning
- add dedicated scenario proving dirty records are captured in ods.*_errors without breaking ETL
- Check:
- aligned steps with current DAG parameters/tasks and SQL transformation flow
- validated expected alert names against Grafana provisioning files
- Why:
- intensive development needs quick cluster stop/cleanup commands
- current Makefile had only up and pipeline/monitoring targets
- What:
- add make target down for standard docker compose shutdown
- add make target clean for full cleanup with volumes and orphans
- update OPERATIONS runbook with new make commands
- Check:
- make -n down clean
- Why:
- during intensive development monitoring can get stuck (No data, out of bounds)
- regular reload is not always enough to recover Prometheus + StatsD pipeline
- What:
- add make target recover-monitoring for hard recovery path
- recreate prometheus and statsd-exporter, restart airflow scheduler/webserver
- keep Grafana provisioning reload and target checks in one command
- document when to use recover-monitoring in OPERATIONS runbook
- Check:
- run make recover-monitoring
- verify Prometheus targets for airflow/clickhouse/kafka are up
- Add port 9126 mapping for ClickHouse Prometheus metrics endpoint
(was configured in prometheus_ch.xml but not exposed in docker-compose.yml)
- Fix CPU Usage panel: use delta() instead of rate() for gauge metric
ClickHouseProfileEvents_OSCPUVirtualTimeMicroseconds is a gauge, not counter
- Add explicit datasource blocks to dashboard queries for consistency
ClickHouse ProfileEvents metrics correctly use rate() — they are counters.
Warning about missing _total suffix is expected (ClickHouse naming convention).
- Why:
- Airflow task metrics were mapped to non-emitted StatsD keys
- reload-monitoring did not restart statsd-exporter after mapping changes
- What:
- update StatsD mapping for Airflow 2.10.5 metric names
- remove problematic catch-all mapping that produced inconsistent series
- restart statsd-exporter in reload-monitoring flow
- sync operations runbook and airflow monitoring plan with actual metrics
- Check:
- make reload-monitoring
- Prometheus targets: airflow/clickhouse/kafka are UP
- trigger ddl_init and verify airflow_task_duration_seconds_count
- verify airflow_task_success_total and airflow_task_failures_total in Prometheus
Fix Grafana warning about using rate() on gauge metric:
- ClickHouseProfileEvents_OSCPUVirtualTimeMicroseconds is a gauge, not counter
- rate() should only be used with counters; using delta() instead
- Add explicit datasource block for consistency
API verified via Context7:
- /prometheus/docs: rate() should never be used on gauges
Add missing entries for monitoring infrastructure:
- prometheus.yml, statsd_mapping.yml configs
- ClickHouse user configs (default_user.xml, prometheus_ch.xml)
- Grafana alerting rules for Kafka and Airflow
- Grafana dashboards for all services
- Monitoring plans (airflow, kafka)
This completes the documentation for the monitoring stack added
in the previous commits.
- Add statsd-exporter service to docker-compose.yml (prom/statsd-exporter:v0.27.1)
- Add StatsD env vars to airflow-default-env for metrics export
- Add airflow job to prometheus.yml scrape configs
- Add Airflow Overview dashboard (Grafana provisioning)
- Add Airflow alert rules: scheduler down, queue backlog, failures, parse time
- Add configs/statsd_mapping.yml for StatsD → Prometheus conversion
- Use Prometheus naming convention (_total for counters, _seconds for timers)
- Add monitoring plan at plans/monitoring_airflow_plan.md
- Update OPERATIONS.md and Makefile for airflow monitoring
Tested: all 3 jobs (airflow, clickhouse, kafka) showing UP in Prometheus,
metrics flowing (dagbag_size=3, executor slots, heartbeats with _total suffix),
all 4 alert rules loaded in Grafana
- Why:
- dashboard showed offset as throughput and produced misleading values
- kafka-exporter metric/label naming was inconsistent across alerts/docs
- consumer-group-missing alert was noisy for demo runs
- What:
- switch throughput panel to rate(kafka_topic_partition_current_offset[5m]) aggregated by topic and exclude __* topics
- align lag metric/labels to kafka_consumergroup_lag + consumergroup
- remove Kafka Consumer Group Missing alert from provisioning
- pin kafka-exporter image to v1.9.0 and update OPERATIONS.md checks
- Check:
- airflow dags list-import-errors -> No data found
- Prometheus targets: clickhouse up, kafka up
- PromQL kafka_consumergroup_lag returns series
- Grafana dashboards provisioning reload returns success
- Why:
- students hit permission denied after pull and grafana restart-loop with readonly db
- What:
- run grafana as default non-root user
- mount provisioning directory as read-only
- add troubleshooting for git permission issues and grafana volume reset
- normalize file modes for data jsonl and docs/DE-task.md to 100644
- Check:
- docker compose config
- docker compose up -d grafana
- curl -u admin:admin http://localhost:3000/api/health
- Add kafka-exporter service to docker-compose.yml
- Add kafka job to prometheus.yml scrape configs
- Add Kafka Overview dashboard (Grafana provisioning)
- Add Kafka alert rules (broker down, consumer lag, etc.)
- Add make reload-monitoring command for easy updates
- Update OPERATIONS.md with TL;DR and troubleshooting
API verified via Context7:
- /danielqsj/kafka_exporter for exporter config
- /prometheus/docs for scrape_configs format
- Why:
- student needs a simple way to apply Grafana/monitoring config updates after git pull
- What:
- add TL;DR block with minimal commands in monitoring section
- add detailed post-pull runbook for datasource/dashboard/alerting reload
- include clickhouse restart note for prometheus_ch.xml changes
- Check:
- reviewed commands and paths in docs/OPERATIONS.md
- Why:
- dashboard panels could resolve to stale datasource uid and show No data
- monitoring required proactive alerts for ClickHouse health signals
- What:
- pin dashboard panels to prometheus_uid and remove datasource templating variable
- fix PromQL metrics for CPU, inserted rows, and parts panels
- add provisioning alert rules for failed queries, memory resident, and active parts
- pin Prometheus datasource uid and update monitoring documentation
- Check:
- POST /api/admin/provisioning/datasources/reload
- POST /api/admin/provisioning/dashboards/reload
- POST /api/admin/provisioning/alerting/reload
- GET /api/v1/provisioning/alert-rules
- Why:
- commit messages with literal \n are hard to read in UI
- What:
- add explicit rule for multiline body formatting in CLI
- add correct examples with git commit -m and -F heredoc
- Check:
- reviewed new section in docs/COMMIT_RULES.md
- Why:\n - AGENTS.md became too large and mixed policy with operational details\n - context7 requirement was easy to miss in long text\n- What:\n - reduce AGENTS.md to a compact contributor contract\n - add explicit mandatory MCP Context7 workflow block\n - move runbook details to docs/OPERATIONS.md\n - move artifact map to docs/REPO_MAP.md\n- Check:\n - reviewed links and content after split\n - ensured only documentation files are included in commit
- 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
Слияние ветки с реализацией автоматизированной загрузки JSONL-файлов в Kafka
через Airflow DAG с валидацией, мониторингом и документацией.
- Что добавлено:
- dags/kafka_load_dag.py: TaskGroup-пайплайн загрузки 4 потоков данных
- dags/utils/kafka_helpers.py: хелперы для работы с Kafka (проверка,
создание топиков, загрузка с лимитом)
- airflow/requirements.txt: зависимость kafka-python==2.0.6
- .gitignore: полноценный шаблон для ETL-проекта
- Параметры DAG:
- limit: ограничение строк (0 = все)
- reset_topics: пересоздание топиков перед загрузкой
- load_browser/device/geo/location_events: выбор потоков
- Обновлена документация:
- README.md, AGENTS.md, docs/ARCHITECTURE.md
- plans/runbook.md, plans/airflow_dags_plan.md
- Why:\n - User-facing docs mixed Airflow and legacy CLI ingest paths and caused confusion\n- What:\n - Rework README quick start and status to use DAG chain ddl_init -> kafka_load -> etl_pipeline\n - Rewrite runbook as canonical Airflow-first execution flow\n - Sync architecture diagrams/sequence and DQ wording with current SQL and DAG behavior\n- Check:\n - Verified updated sections and removed stale markers with rg in README.md, docs/ARCHITECTURE.md, plans/runbook.md
- Why:
- For DE task we only need full ingest or limit-based sample.
- load_* and full_load params were redundant and unclear in current flow.
- What:
- Remove full_load and load_* params from kafka_load DAG contract.
- Simplify kafka helpers (validate/check files) to fixed 4-stream ingest.
- Sync AGENTS, README, runbook, architecture and airflow plan docs.
- Check:
- python3 -m py_compile dags/kafka_load_dag.py dags/utils/kafka_helpers.py
- Airflow smoke/full runs: ddl_init -> kafka_load -> etl_pipeline (all success).
- Legacy path: make data && make transform (success).
- Why:
- Align with Conventional Commits specification for consistency
- English is standard for open-source and team collaboration
- What:
- Change primary language to English (Russian still allowed)
- Add type and scope reference tables
- Add both English and Russian body templates
- Add good/bad examples section
- Add quick reference for common commit types
- Check:
- File renders correctly in markdown viewer
- Examples follow the new format rules
- Зачем:
- унифицировать стиль коммитов для всех участников проекта
- Что сделано:
- добавлен документ docs/COMMIT_RULES.md с форматом и примерами
- добавлена ссылка на правила в AGENTS.md
- Проверка:
- проверен staged diff перед коммитом
- Изменен путь volume с /tmp/kraft-combined-logs на /var/lib/kafka/data
- Решена проблема с правами доступа при старте Kafka в KRaft mode
- Kafka теперь корректно инициализирует метаданные при первом запуске
Add persistent volume for ClickHouse to preserve data across container
restarts. The volume `clickhouse-data` is mounted to `/var/lib/clickhouse`,
ensuring data remains when containers are recreated.
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
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