--- upgrade: - Ocata requires that your deployment have created the cell and host mappings in Newton. If you have not done this, Ocata's `db sync` command will fail. Small deployments will want to run `nova-manage cell_v2 simple_cell_setup` on Newton before upgrading. Operators must create a new database for cell0 before running `cell_v2 simple_cell_setup`. The simple cell setup command expects the name of the cell0 database to be `
_cell0` as it will create a cell mapping for cell0 based on the main database connection, sync the cell0 database, and associate existing hosts and instances with the single cell.