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Nova DB Purge

What is it?

It's a small tool that purges nova database per date. It creates a file with all instances removed to be used for child cells purge.

How to use it?

To see the available options run:

python nova-db-purge -h

There 5 optional arguments:
--date DATE Remove deleted instances until this date
--file FILE Remove deleted instances defined in the file
--cell CELL Remove instances that belong to cell
--dryrun Don't delete instances
--config CONFIG Configuration file

Examples

Remove all instances deleted before "2015-02-01 00:00:00".
In a cell environment should be used in the parent cell.
python cern-db-purge --date "2015-02-01 00:00:00" --config nova.conf

Remove all instances that belong to cell "child_cell_01" that have a reference in the file "delete_these_instances.txt".
In a cell environment should be used in the child cells.
python cern-db-purge --file "delete_these_instances.txt" --cell 'top_cell!child_cell_01' --config nova.conf

Nova versions supported

We use it in Icehouse.

Bugs and Disclaimer

Bugs? Oh, almost certainly.

This tool was written to be used in the CERN Cloud Infrastructure and it has been tested only in our environment.

Since it updates nova DB use it with extremely caution.

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