a80bbf8b6e
The patch adds an extension which implements the procedure of upgrading clusters from one major release to another. As a first step of the procedure the extension provides an ability to create a seed cluster with the same settings as the original. Implements blueprint: nailgun-api-env-upgrade-extensions Change-Id: I22d51a3ffd51a7c88bdcbde0eef6f47b65def1c8
91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
# Copyright 2015 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from __future__ import with_statement
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from alembic import context
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from logging.config import fileConfig
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from sqlalchemy import engine_from_config
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from sqlalchemy import pool
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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fileConfig(config.config_file_name)
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# add your model's MetaData object here
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# for 'autogenerate' support
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# from myapp import mymodel
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# target_metadata = mymodel.Base.metadata
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target_metadata = None
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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def run_migrations_offline():
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"""Run migrations in 'offline' mode.
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This configures the context with just a URL
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and not an Engine, though an Engine is acceptable
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here as well. By skipping the Engine creation
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we don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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context.configure(
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url=config.get_main_option('sqlalchemy.url'),
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version_table=config.get_main_option('version_table'))
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with context.begin_transaction():
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context.run_migrations()
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def run_migrations_online():
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"""Run migrations in 'online' mode.
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In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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engine = engine_from_config(
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config.get_section(config.config_ini_section),
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prefix='sqlalchemy.',
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poolclass=pool.NullPool)
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connection = engine.connect()
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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version_table=config.get_main_option('version_table'))
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try:
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with context.begin_transaction():
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context.run_migrations()
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finally:
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connection.close()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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