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import uuid
from sqlalchemy import Column, Boolean, true as sqltrue, String
from airflow.models.base import Base
from airflow.utils.db import provide_session
[docs]class KubeResourceVersion(Base):
[docs] __tablename__ = "kube_resource_version"
[docs] one_row_id = Column(Boolean, server_default=sqltrue(), primary_key=True)
[docs] resource_version = Column(String(255))
@staticmethod
@provide_session
[docs] def get_current_resource_version(session=None):
(resource_version,) = session.query(KubeResourceVersion.resource_version).one()
return resource_version
@staticmethod
@provide_session
[docs] def checkpoint_resource_version(resource_version, session=None):
if resource_version:
session.query(KubeResourceVersion).update({
KubeResourceVersion.resource_version: resource_version
})
session.commit()
@staticmethod
@provide_session
[docs] def reset_resource_version(session=None):
session.query(KubeResourceVersion).update({
KubeResourceVersion.resource_version: '0'
})
session.commit()
return '0'
[docs]class KubeWorkerIdentifier(Base):
[docs] __tablename__ = "kube_worker_uuid"
[docs] one_row_id = Column(Boolean, server_default=sqltrue(), primary_key=True)
[docs] worker_uuid = Column(String(255))
@staticmethod
@provide_session
[docs] def get_or_create_current_kube_worker_uuid(session=None):
(worker_uuid,) = session.query(KubeWorkerIdentifier.worker_uuid).one()
if worker_uuid == '':
worker_uuid = str(uuid.uuid4())
KubeWorkerIdentifier.checkpoint_kube_worker_uuid(worker_uuid, session)
return worker_uuid
@staticmethod
@provide_session
[docs] def checkpoint_kube_worker_uuid(worker_uuid, session=None):
if worker_uuid:
session.query(KubeWorkerIdentifier).update({
KubeWorkerIdentifier.worker_uuid: worker_uuid
})
session.commit()