airflow 0028_1_10_0_add_kubernetes_resource_checkpointing 源码
airflow 0028_1_10_0_add_kubernetes_resource_checkpointing 代码
文件路径：/airflow/migrations/versions/0028_1_10_0_add_kubernetes_resource_checkpointing.py
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# to you under the Apache License, Version 2.0 (the
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"""Add Kubernetes resource check-pointing
Revision ID: 33ae817a1ff4
Revises: 947454bf1dff
Create Date: 2017-09-11 15:26:47.598494
"""
from __future__ import annotations
import sqlalchemy as sa
from alembic import op
from sqlalchemy import inspect
# revision identifiers, used by Alembic.
revision = '33ae817a1ff4'
down_revision = 'd2ae31099d61'
branch_labels = None
depends_on = None
airflow_version = '1.10.0'
RESOURCE_TABLE = "kube_resource_version"
def upgrade():
conn = op.get_bind()
inspector = inspect(conn)
if RESOURCE_TABLE not in inspector.get_table_names():
columns_and_constraints = [
sa.Column("one_row_id", sa.Boolean, server_default=sa.true(), primary_key=True),
sa.Column("resource_version", sa.String(255)),
]
# alembic creates an invalid SQL for mssql and mysql dialects
if conn.dialect.name in {"mysql"}:
columns_and_constraints.append(
sa.CheckConstraint("one_row_id<>0", name="kube_resource_version_one_row_id")
)
elif conn.dialect.name not in {"mssql"}:
columns_and_constraints.append(
sa.CheckConstraint("one_row_id", name="kube_resource_version_one_row_id")
)
table = op.create_table(RESOURCE_TABLE, *columns_and_constraints)
op.bulk_insert(table, [{"resource_version": ""}])
def downgrade():
conn = op.get_bind()
inspector = inspect(conn)
if RESOURCE_TABLE in inspector.get_table_names():
op.drop_table(RESOURCE_TABLE)
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