Source code for airflow.models.kubernetes

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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()

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