8b279a3b77
There is a lot of tables where we should add unique constraints on upgrade and drop on downgrade, to avoid race conditions. But there is a problem with SQLite. SQLite does not allow to drop unique constraints. There is only one way to drop UC in SQLite: 1) create new table, with same columns and UC (but without UC that we want to drop) 2) copy data from old table 3) drop old table 4) create indexes in new table from old 5) rename new table to old table name For other DB backends is used 'alter table'. This patch add generic method for dropping UC. blueprint db-unique-keys Change-Id: I3e60578d3902559996943868abeb17b41153769b
OpenStack Nova README
OpenStack Nova provides a cloud computing fabric controller, supporting a wide variety of virtualization technologies, including KVM, Xen, LXC, VMWare, and more. In addition to its native API, it includes compatibility with the commonly encountered Amazon EC2 and S3 APIs.
OpenStack Nova is distributed under the terms of the Apache License, Version 2.0. The full terms and conditions of this license are detailed in the LICENSE file.
Nova primarily consists of a set of Python daemons, though it requires and integrates with a number of native system components for databases, messaging and virtualization capabilities.
To keep updated with new developments in the OpenStack project follow @openstack on Twitter.
To learn how to deploy OpenStack Nova, consult the documentation available online at:
In the unfortunate event that bugs are discovered, they should be reported to the appropriate bug tracker. If you obtained the software from a 3rd party operating system vendor, it is often wise to use their own bug tracker for reporting problems. In all other cases use the master OpenStack bug tracker, available at:
Developers wishing to work on the OpenStack Nova project should always base their work on the latest Nova code, available from the master GIT repository at:
Developers should also join the discussion on the mailing list, at:
Any new code must follow the development guidelines detailed in the HACKING.rst file, and pass all unit tests. Further developer focused documentation is available at:
For information on how to contribute to Nova, please see the contents of the CONTRIBUTING.rst file.
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