Cloud Composer 1 | Cloud Composer 2 | Cloud Composer 3
Cette page explique comment gérer la base de données Airflow dans votre environnement.
Au fil du temps, la base de données Airflow de votre environnement stocke de plus en plus plus de données. Ces données incluent des informations et des journaux liés aux exécutions DAG, aux tâches et aux autres opérations Airflow passées.
Avant de commencer
Si la taille de la base de données Airflow est supérieure à 16 Go, vous ne pouvez pas mettre à niveau votre environnement vers une version ultérieure.
Si la taille de la base de données Airflow est supérieure à 20 Go, il est impossible de créer des instantanés.
Si vous utilisez le mécanisme XCom pour transférer des fichiers, assurez-vous l'utiliser conformément aux instructions d'Airflow. Transfert de fichiers volumineux ou en grand nombre via XCom les performances de la base de données Airflow et peuvent entraîner des défaillances lors du chargement. ni mettre à niveau votre environnement. Envisagez d'utiliser des alternatives telles que que Cloud Storage pour transférer d'importants volumes de données.
Exécuter le DAG de maintenance de la base de données selon un calendrier
Vous pouvez utiliser le DAG de maintenance suivant pour nettoyer le contenu de votre base de données.
Veillez à exécuter régulièrement le DAG de maintenance pour conserver la taille de la base de données inférieures à 16 Go. Nous vous recommandons d'exécuter ce DAG quotidiennement pour la plupart des environnements. Si vous constatez que la métrique de taille de la base de données augmente considérablement entre les exécutions, envisagez d'exécuter ce DAG plus souvent.
Choisissez une période de conservation (DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS) qui permet de limiter la taille de la base de données à 16 Go. Nous vous recommandons de définir une période de
comme point de départ pour la plupart des environnements.
Ce DAG supprime les anciennes entrées de job, dag_run,
task_instance, log, xcom, sla_miss, dags, task_reschedule
dans les tables task_fail et import_error par défaut. Dans le DAG, examinez la liste
de tables et décider si les anciennes entrées doivent être supprimées de celles-ci. En général, la plupart des économies d'espace sont obtenues en nettoyant les tables log, task_instance, dag_run et xcom. Pour exclure une table de la suppression, modifiez le DAG et commentez les éléments correspondants dans la liste DATABASE_OBJECTS.
Airflow 2
"""
A maintenance workflow that you can deploy into Airflow to periodically clean
out the DagRun, TaskInstance, Log, XCom, Job DB and SlaMiss entries to avoid
having too much data in your Airflow MetaStore.
## Authors
The DAG is a fork of [teamclairvoyant repository.](
https://github.com/teamclairvoyant/airflow-maintenance-dags/tree/master/db-cleanup
)
## Usage
1. Update the global variables (SCHEDULE_INTERVAL, DAG_OWNER_NAME,
ALERT_EMAIL_ADDRESSES and ENABLE_DELETE) in the DAG with the desired values
2. Modify the DATABASE_OBJECTS list to add/remove objects as needed. Each
dictionary in the list features the following parameters:
- airflow_db_model: Model imported from airflow.models corresponding to
a table in the airflow metadata database
- age_check_column: Column in the model/table to use for calculating max
date of data deletion
- keep_last: Boolean to specify whether to preserve last run instance
- keep_last_filters: List of filters to preserve data from deleting
during clean-up, such as DAG runs where the external trigger is set
to 0.
- keep_last_group_by: Option to specify column by which to group the
database entries and perform aggregate functions.
3. Create and Set the following Variables in the Airflow Web Server
(Admin -> Variables)
- airflow_db_cleanup__max_db_entry_age_in_days - integer - Length to
retain the log files if not already provided in the conf. If this is set
to 30, the job will remove those files that are 30 days old or older.
4. Put the DAG in your gcs bucket.
"""
from datetime import timedelta
import logging
import os
import airflow
from airflow import settings
from airflow.models import (
DAG,
DagModel,
DagRun,
Log,
SlaMiss,
TaskInstance,
Variable,
XCom,
)
from airflow.operators.python import PythonOperator
from airflow.utils import timezone
from airflow.version import version as airflow_version
import dateutil.parser
from sqlalchemy import and_, func, text
from sqlalchemy.exc import ProgrammingError
now = timezone.utcnow
# airflow-db-cleanup
DAG_ID = os.path.basename(__file__).replace(".pyc", "").replace(".py", "")
START_DATE = airflow.utils.dates.days_ago(1)
# How often to Run. @daily - Once a day at Midnight (UTC)
SCHEDULE_INTERVAL = "@daily"
# Who is listed as the owner of this DAG in the Airflow Web Server
DAG_OWNER_NAME = "operations"
# List of email address to send email alerts to if this job fails
ALERT_EMAIL_ADDRESSES = []
# Airflow version used by the environment in list form, value stored in
# airflow_version is in format e.g "2.3.4+composer"
AIRFLOW_VERSION = airflow_version[: -len("+composer")].split(".")
# Length to retain the log files if not already provided in the conf. If this
# is set to 30, the job will remove those files that arE 30 days old or older.
DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS = int(
Variable.get("airflow_db_cleanup__max_db_entry_age_in_days", 30)
)
# Prints the database entries which will be getting deleted; set to False
# to avoid printing large lists and slowdown process
PRINT_DELETES = False
# Whether the job should delete the db entries or not. Included if you want to
# temporarily avoid deleting the db entries.
ENABLE_DELETE = True
# List of all the objects that will be deleted. Comment out the DB objects you
# want to skip.
DATABASE_OBJECTS = [
{
"airflow_db_model": DagRun,
"age_check_column": DagRun.execution_date,
"keep_last": True,
"keep_last_filters": [DagRun.external_trigger.is_(False)],
"keep_last_group_by": DagRun.dag_id,
},
{
"airflow_db_model": TaskInstance,
"age_check_column": TaskInstance.start_date
if AIRFLOW_VERSION < ["2", "2", "0"]
else TaskInstance.start_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": Log,
"age_check_column": Log.dttm,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": XCom,
"age_check_column": XCom.execution_date
if AIRFLOW_VERSION < ["2", "2", "5"]
else XCom.timestamp,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": SlaMiss,
"age_check_column": SlaMiss.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": DagModel,
"age_check_column": DagModel.last_parsed_time,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
]
# Check for TaskReschedule model
try:
from airflow.models import TaskReschedule
DATABASE_OBJECTS.append(
{
"airflow_db_model": TaskReschedule,
"age_check_column": TaskReschedule.execution_date
if AIRFLOW_VERSION < ["2", "2", "0"]
else TaskReschedule.start_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
# Check for TaskFail model
try:
from airflow.models import TaskFail
DATABASE_OBJECTS.append(
{
"airflow_db_model": TaskFail,
"age_check_column": TaskFail.start_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
# Check for RenderedTaskInstanceFields model
if AIRFLOW_VERSION < ["2", "4", "0"]:
try:
from airflow.models import RenderedTaskInstanceFields
DATABASE_OBJECTS.append(
{
"airflow_db_model": RenderedTaskInstanceFields,
"age_check_column": RenderedTaskInstanceFields.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
# Check for ImportError model
try:
from airflow.models import ImportError
DATABASE_OBJECTS.append(
{
"airflow_db_model": ImportError,
"age_check_column": ImportError.timestamp,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
"do_not_delete_by_dag_id": True,
}
)
except Exception as e:
logging.error(e)
if AIRFLOW_VERSION < ["2", "6", "0"]:
try:
from airflow.jobs.base_job import BaseJob
DATABASE_OBJECTS.append(
{
"airflow_db_model": BaseJob,
"age_check_column": BaseJob.latest_heartbeat,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
else:
try:
from airflow.jobs.job import Job
DATABASE_OBJECTS.append(
{
"airflow_db_model": Job,
"age_check_column": Job.latest_heartbeat,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
default_args = {
"owner": DAG_OWNER_NAME,
"depends_on_past": False,
"email": ALERT_EMAIL_ADDRESSES,
"email_on_failure": True,
"email_on_retry": False,
"start_date": START_DATE,
"retries": 1,
"retry_delay": timedelta(minutes=1),
}
dag = DAG(
DAG_ID,
default_args=default_args,
schedule_interval=SCHEDULE_INTERVAL,
start_date=START_DATE,
)
if hasattr(dag, "doc_md"):
dag.doc_md = __doc__
if hasattr(dag, "catchup"):
dag.catchup = False
def print_configuration_function(**context):
logging.info("Loading Configurations...")
dag_run_conf = context.get("dag_run").conf
logging.info("dag_run.conf: " + str(dag_run_conf))
max_db_entry_age_in_days = None
if dag_run_conf:
max_db_entry_age_in_days = dag_run_conf.get("maxDBEntryAgeInDays", None)
logging.info("maxDBEntryAgeInDays from dag_run.conf: " + str(dag_run_conf))
if max_db_entry_age_in_days is None or max_db_entry_age_in_days < 1:
logging.info(
"maxDBEntryAgeInDays conf variable isn't included or Variable "
+ "value is less than 1. Using Default '"
+ str(DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS)
+ "'"
)
max_db_entry_age_in_days = DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS
max_date = now() + timedelta(-max_db_entry_age_in_days)
logging.info("Finished Loading Configurations")
logging.info("")
logging.info("Configurations:")
logging.info("max_db_entry_age_in_days: " + str(max_db_entry_age_in_days))
logging.info("max_date: " + str(max_date))
logging.info("enable_delete: " + str(ENABLE_DELETE))
logging.info("")
logging.info("Setting max_execution_date to XCom for Downstream Processes")
context["ti"].xcom_push(key="max_date", value=max_date.isoformat())
print_configuration = PythonOperator(
task_id="print_configuration",
python_callable=print_configuration_function,
provide_context=True,
dag=dag,
)
def build_query(
session,
airflow_db_model,
age_check_column,
max_date,
keep_last,
keep_last_filters=None,
keep_last_group_by=None,
):
query = session.query(airflow_db_model)
logging.info("INITIAL QUERY : " + str(query))
if not keep_last:
query = query.filter(
age_check_column <= max_date,
)
else:
subquery = session.query(func.max(DagRun.execution_date))
# workaround for MySQL "table specified twice" issue
# https://github.com/teamclairvoyant/airflow-maintenance-dags/issues/41
if keep_last_filters is not None:
for entry in keep_last_filters:
subquery = subquery.filter(entry)
logging.info("SUB QUERY [keep_last_filters]: " + str(subquery))
if keep_last_group_by is not None:
subquery = subquery.group_by(keep_last_group_by)
logging.info("SUB QUERY [keep_last_group_by]: " + str(subquery))
subquery = subquery.from_self()
query = query.filter(
and_(age_check_column.notin_(subquery)), and_(age_check_column <= max_date)
)
return query
def print_query(query, airflow_db_model, age_check_column):
entries_to_delete = query.all()
logging.info("Query: " + str(query))
logging.info(
"Process will be Deleting the following "
+ str(airflow_db_model.__name__)
+ "(s):"
)
for entry in entries_to_delete:
date = str(entry.__dict__[str(age_check_column).split(".")[1]])
logging.info("\tEntry: " + str(entry) + ", Date: " + date)
logging.info(
"Process will be Deleting "
+ str(len(entries_to_delete))
+ " "
+ str(airflow_db_model.__name__)
+ "(s)"
)
def cleanup_function(**context):
session = settings.Session()
logging.info("Retrieving max_execution_date from XCom")
max_date = context["ti"].xcom_pull(
task_ids=print_configuration.task_id, key="max_date"
)
max_date = dateutil.parser.parse(max_date) # stored as iso8601 str in xcom
airflow_db_model = context["params"].get("airflow_db_model")
state = context["params"].get("state")
age_check_column = context["params"].get("age_check_column")
keep_last = context["params"].get("keep_last")
keep_last_filters = context["params"].get("keep_last_filters")
keep_last_group_by = context["params"].get("keep_last_group_by")
logging.info("Configurations:")
logging.info("max_date: " + str(max_date))
logging.info("enable_delete: " + str(ENABLE_DELETE))
logging.info("session: " + str(session))
logging.info("airflow_db_model: " + str(airflow_db_model))
logging.info("state: " + str(state))
logging.info("age_check_column: " + str(age_check_column))
logging.info("keep_last: " + str(keep_last))
logging.info("keep_last_filters: " + str(keep_last_filters))
logging.info("keep_last_group_by: " + str(keep_last_group_by))
logging.info("")
logging.info("Running Cleanup Process...")
try:
if context["params"].get("do_not_delete_by_dag_id"):
query = build_query(
session,
airflow_db_model,
age_check_column,
max_date,
keep_last,
keep_last_filters,
keep_last_group_by,
)
if PRINT_DELETES:
print_query(query, airflow_db_model, age_check_column)
if ENABLE_DELETE:
logging.info("Performing Delete...")
query.delete(synchronize_session=False)
session.commit()
else:
dags = session.query(airflow_db_model.dag_id).distinct()
session.commit()
list_dags = [str(list(dag)[0]) for dag in dags] + [None]
for dag in list_dags:
query = build_query(
session,
airflow_db_model,
age_check_column,
max_date,
keep_last,
keep_last_filters,
keep_last_group_by,
)
query = query.filter(airflow_db_model.dag_id == dag)
if PRINT_DELETES:
print_query(query, airflow_db_model, age_check_column)
if ENABLE_DELETE:
logging.info("Performing Delete...")
query.delete(synchronize_session=False)
session.commit()
if not ENABLE_DELETE:
logging.warn(
"You've opted to skip deleting the db entries. "
"Set ENABLE_DELETE to True to delete entries!!!"
)
logging.info("Finished Running Cleanup Process")
except ProgrammingError as e:
logging.error(e)
logging.error(
str(airflow_db_model) + " is not present in the metadata." + "Skipping..."
)
finally:
session.close()
def cleanup_sessions():
session = settings.Session()
try:
logging.info("Deleting sessions...")
count_statement = (
"SELECT COUNT(*) AS cnt FROM session WHERE expiry < now()::timestamp(0);"
)
before = session.execute(text(count_statement)).one_or_none()["cnt"]
session.execute(text("DELETE FROM session WHERE expiry < now()::timestamp(0);"))
after = session.execute(text(count_statement)).one_or_none()["cnt"]
logging.info("Deleted %s expired sessions.", (before - after))
except Exception as err:
logging.exception(err)
session.commit()
session.close()
def analyze_db():
session = settings.Session()
session.execute("ANALYZE")
session.commit()
session.close()
analyze_op = PythonOperator(
task_id="analyze_query", python_callable=analyze_db, provide_context=True, dag=dag
)
cleanup_session_op = PythonOperator(
task_id="cleanup_sessions",
python_callable=cleanup_sessions,
provide_context=True,
dag=dag,
)
cleanup_session_op.set_downstream(analyze_op)
for db_object in DATABASE_OBJECTS:
cleanup_op = PythonOperator(
task_id="cleanup_" + str(db_object["airflow_db_model"].__name__),
python_callable=cleanup_function,
params=db_object,
provide_context=True,
dag=dag,
)
print_configuration.set_downstream(cleanup_op)
cleanup_op.set_downstream(analyze_op)
Airflow 1
"""
A maintenance workflow that you can deploy into Airflow to periodically clean
out the DagRun, TaskInstance, Log, XCom, Job DB and SlaMiss entries to avoid
having too much data in your Airflow MetaStore.
## Authors
The DAG is a fork of [teamclairvoyant repository.](https://github.com/teamclairvoyant/airflow-maintenance-dags/tree/master/db-cleanup)
## Usage
1. Update the global variables (SCHEDULE_INTERVAL, DAG_OWNER_NAME,
ALERT_EMAIL_ADDRESSES and ENABLE_DELETE) in the DAG with the desired values
2. Modify the DATABASE_OBJECTS list to add/remove objects as needed. Each
dictionary in the list features the following parameters:
- airflow_db_model: Model imported from airflow.models corresponding to
a table in the airflow metadata database
- age_check_column: Column in the model/table to use for calculating max
date of data deletion
- keep_last: Boolean to specify whether to preserve last run instance
- keep_last_filters: List of filters to preserve data from deleting
during clean-up, such as DAG runs where the external trigger is set to 0.
- keep_last_group_by: Option to specify column by which to group the
database entries and perform aggregate functions.
3. Create and Set the following Variables in the Airflow Web Server
(Admin -> Variables)
- airflow_db_cleanup__max_db_entry_age_in_days - integer - Length to retain
the log files if not already provided in the conf. If this is set to 30,
the job will remove those files that are 30 days old or older.
4. Put the DAG in your gcs bucket.
"""
from datetime import datetime, timedelta
import logging
import os
import airflow
from airflow import settings
from airflow.jobs import BaseJob
from airflow.models import (
DAG,
DagModel,
DagRun,
Log,
SlaMiss,
TaskInstance,
Variable,
XCom,
)
from airflow.operators.python_operator import PythonOperator
from airflow.version import version as airflow_version
import dateutil.parser
from sqlalchemy import and_, func
from sqlalchemy.exc import ProgrammingError
from sqlalchemy.orm import load_only
try:
# airflow.utils.timezone is available from v1.10 onwards
from airflow.utils import timezone
now = timezone.utcnow
except ImportError:
now = datetime.utcnow
# airflow-db-cleanup
DAG_ID = os.path.basename(__file__).replace(".pyc", "").replace(".py", "")
START_DATE = airflow.utils.dates.days_ago(1)
# How often to Run. @daily - Once a day at Midnight (UTC)
SCHEDULE_INTERVAL = "@daily"
# Who is listed as the owner of this DAG in the Airflow Web Server
DAG_OWNER_NAME = "operations"
# List of email address to send email alerts to if this job fails
ALERT_EMAIL_ADDRESSES = []
# Airflow version used by the environment in list form, value stored in
# airflow_version is in format e.g "1.10.15+composer"
AIRFLOW_VERSION = airflow_version[: -len("+composer")].split(".")
# Length to retain the log files if not already provided in the conf. If this
# is set to 30, the job will remove those files that arE 30 days old or older.
DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS = int(
Variable.get("airflow_db_cleanup__max_db_entry_age_in_days", 30)
)
# Prints the database entries which will be getting deleted; set to False
# to avoid printing large lists and slowdown process
PRINT_DELETES = False
# Whether the job should delete the db entries or not. Included if you want to
# temporarily avoid deleting the db entries.
ENABLE_DELETE = True
# List of all the objects that will be deleted. Comment out the DB objects you
# want to skip.
DATABASE_OBJECTS = [
{
"airflow_db_model": BaseJob,
"age_check_column": BaseJob.latest_heartbeat,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": DagRun,
"age_check_column": DagRun.execution_date,
"keep_last": True,
"keep_last_filters": [DagRun.external_trigger.is_(False)],
"keep_last_group_by": DagRun.dag_id,
},
{
"airflow_db_model": TaskInstance,
"age_check_column": TaskInstance.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": Log,
"age_check_column": Log.dttm,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": XCom,
"age_check_column": XCom.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": SlaMiss,
"age_check_column": SlaMiss.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
{
"airflow_db_model": DagModel,
"age_check_column": DagModel.last_scheduler_run,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
},
]
# Check for TaskReschedule model
try:
from airflow.models import TaskReschedule
DATABASE_OBJECTS.append(
{
"airflow_db_model": TaskReschedule,
"age_check_column": TaskReschedule.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
# Check for TaskFail model
try:
from airflow.models import TaskFail
DATABASE_OBJECTS.append(
{
"airflow_db_model": TaskFail,
"age_check_column": TaskFail.execution_date,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
}
)
except Exception as e:
logging.error(e)
# Check for ImportError model
try:
from airflow.models import ImportError
DATABASE_OBJECTS.append(
{
"airflow_db_model": ImportError,
"age_check_column": ImportError.timestamp,
"keep_last": False,
"keep_last_filters": None,
"keep_last_group_by": None,
"do_not_delete_by_dag_id": True,
}
)
except Exception as e:
logging.error(e)
default_args = {
"owner": DAG_OWNER_NAME,
"depends_on_past": False,
"email": ALERT_EMAIL_ADDRESSES,
"email_on_failure": True,
"email_on_retry": False,
"start_date": START_DATE,
"retries": 1,
"retry_delay": timedelta(minutes=1),
}
dag = DAG(
DAG_ID,
default_args=default_args,
schedule_interval=SCHEDULE_INTERVAL,
start_date=START_DATE,
)
if hasattr(dag, "doc_md"):
dag.doc_md = __doc__
if hasattr(dag, "catchup"):
dag.catchup = False
def print_configuration_function(**context):
logging.info("Loading Configurations...")
dag_run_conf = context.get("dag_run").conf
logging.info("dag_run.conf: " + str(dag_run_conf))
max_db_entry_age_in_days = None
if dag_run_conf:
max_db_entry_age_in_days = dag_run_conf.get("maxDBEntryAgeInDays", None)
logging.info("maxDBEntryAgeInDays from dag_run.conf: " + str(dag_run_conf))
if max_db_entry_age_in_days is None or max_db_entry_age_in_days < 1:
logging.info(
"maxDBEntryAgeInDays conf variable isn't included or Variable "
+ "value is less than 1. Using Default '"
+ str(DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS)
+ "'"
)
max_db_entry_age_in_days = DEFAULT_MAX_DB_ENTRY_AGE_IN_DAYS
max_date = now() + timedelta(-max_db_entry_age_in_days)
logging.info("Finished Loading Configurations")
logging.info("")
logging.info("Configurations:")
logging.info("max_db_entry_age_in_days: " + str(max_db_entry_age_in_days))
logging.info("max_date: " + str(max_date))
logging.info("enable_delete: " + str(ENABLE_DELETE))
logging.info("")
logging.info("Setting max_execution_date to XCom for Downstream Processes")
context["ti"].xcom_push(key="max_date", value=max_date.isoformat())
print_configuration = PythonOperator(
task_id="print_configuration",
python_callable=print_configuration_function,
provide_context=True,
dag=dag,
)
def build_query(
session,
airflow_db_model,
age_check_column,
max_date,
keep_last,
keep_last_filters=None,
keep_last_group_by=None,
):
query = session.query(airflow_db_model).options(load_only(age_check_column))
logging.info("INITIAL QUERY : " + str(query))
if not keep_last:
query = query.filter(
age_check_column <= max_date,
)
else:
subquery = session.query(func.max(DagRun.execution_date))
# workaround for MySQL "table specified twice" issue
# https://github.com/teamclairvoyant/airflow-maintenance-dags/issues/41
if keep_last_filters is not None:
for entry in keep_last_filters:
subquery = subquery.filter(entry)
logging.info("SUB QUERY [keep_last_filters]: " + str(subquery))
if keep_last_group_by is not None:
subquery = subquery.group_by(keep_last_group_by)
logging.info("SUB QUERY [keep_last_group_by]: " + str(subquery))
subquery = subquery.from_self()
query = query.filter(
and_(age_check_column.notin_(subquery)), and_(age_check_column <= max_date)
)
return query
def print_query(query, airflow_db_model, age_check_column):
entries_to_delete = query.all()
logging.info("Query: " + str(query))
logging.info(
"Process will be Deleting the following "
+ str(airflow_db_model.__name__)
+ "(s):"
)
for entry in entries_to_delete:
date = str(entry.__dict__[str(age_check_column).split(".")[1]])
logging.info("\tEntry: " + str(entry) + ", Date: " + date)
logging.info(
"Process will be Deleting "
+ str(len(entries_to_delete))
+ " "
+ str(airflow_db_model.__name__)
+ "(s)"
)
def cleanup_function(**context):
session = settings.Session()
logging.info("Retrieving max_execution_date from XCom")
max_date = context["ti"].xcom_pull(
task_ids=print_configuration.task_id, key="max_date"
)
max_date = dateutil.parser.parse(max_date) # stored as iso8601 str in xcom
airflow_db_model = context["params"].get("airflow_db_model")
state = context["params"].get("state")
age_check_column = context["params"].get("age_check_column")
keep_last = context["params"].get("keep_last")
keep_last_filters = context["params"].get("keep_last_filters")
keep_last_group_by = context["params"].get("keep_last_group_by")
logging.info("Configurations:")
logging.info("max_date: " + str(max_date))
logging.info("enable_delete: " + str(ENABLE_DELETE))
logging.info("session: " + str(session))
logging.info("airflow_db_model: " + str(airflow_db_model))
logging.info("state: " + str(state))
logging.info("age_check_column: " + str(age_check_column))
logging.info("keep_last: " + str(keep_last))
logging.info("keep_last_filters: " + str(keep_last_filters))
logging.info("keep_last_group_by: " + str(keep_last_group_by))
logging.info("")
logging.info("Running Cleanup Process...")
try:
if context["params"].get("do_not_delete_by_dag_id"):
query = build_query(
session,
airflow_db_model,
age_check_column,
max_date,
keep_last,
keep_last_filters,
keep_last_group_by,
)
if PRINT_DELETES:
print_query(query, airflow_db_model, age_check_column)
if ENABLE_DELETE:
logging.info("Performing Delete...")
query.delete(synchronize_session=False)
session.commit()
else:
dags = session.query(airflow_db_model.dag_id).distinct()
session.commit()
list_dags = [str(list(dag)[0]) for dag in dags]
for dag in list_dags:
query = build_query(
session,
airflow_db_model,
age_check_column,
max_date,
keep_last,
keep_last_filters,
keep_last_group_by,
)
query = query.filter(airflow_db_model.dag_id == dag)
if PRINT_DELETES:
print_query(query, airflow_db_model, age_check_column)
if ENABLE_DELETE:
logging.info("Performing Delete...")
query.delete(synchronize_session=False)
session.commit()
if not ENABLE_DELETE:
logging.warn(
"You've opted to skip deleting the db entries. "
"Set ENABLE_DELETE to True to delete entries!!!"
)
logging.info("Finished Running Cleanup Process")
except ProgrammingError as e:
logging.error(e)
logging.error(
str(airflow_db_model) + " is not present in the metadata. " "Skipping..."
)
finally:
session.close()
for db_object in DATABASE_OBJECTS:
cleanup_op = PythonOperator(
task_id="cleanup_" + str(db_object["airflow_db_model"].__name__),
python_callable=cleanup_function,
params=db_object,
provide_context=True,
dag=dag,
)
print_configuration.set_downstream(cleanup_op)
Supprimer les entrées des DAG inutilisés
Vous pouvez supprimer les entrées de base de données des DAG inutilisés en supprimant les DAG de l'interface Web d'Airflow.