Backup database

By default, COU plans for and runs a backup step of the cloud database before proceeding to actual upgrade steps.

Find mysql backup file

The file is store under $COU_DATA, which is /home/$USER/.local/share/cou if $USER exists else current directory.

Plan/Upgrade without cloud database backup

To plan/upgrade without backup, this can be turned off with --no-backup flag.

Usage examples

Plan:

~$ cou plan --no-backup

Full execution log: '/home/ubuntu/.local/share/cou/log/cou-20231215211717.log'Connected to 'test-model' ✔Analyzing cloud... ✔Generating upgrade plan... ✔Upgrade cloud from 'ussuri' to 'victoria'    Verify that all OpenStack applications are in idle state    # note that there's no backup step planned    Archive old database data on nova-cloud-controller    Control Plane principal(s) upgrade plan    Upgrade plan for 'rabbitmq-server' to 'victoria'        Upgrade software packages of 'rabbitmq-server' from the current APT repositories            Upgrade software packages on unit 'rabbitmq-server/0'            Upgrade software packages on unit 'rabbitmq-server/1'            Upgrade software packages on unit 'rabbitmq-server/2'    ...

Upgrade:

~$ cou upgrade --no-backup

Full execution log: '/home/ubuntu/.local/share/cou/log/cou-20231215211717.log'Connected to 'test-model' ✔Analyzing cloud... ✔Generating upgrade plan... ✔...Running cloud upgrade...Verify that all OpenStack applications are in idle state ✔# note that there's no backup step being executed Upgrade plan for 'rabbitmq-server' to 'victoria'    Upgrade software packages of 'rabbitmq-server' from the current APT repositories        Upgrade software packages on unit 'rabbitmq-server/0'        Upgrade software packages on unit 'rabbitmq-server/1'        Upgrade software packages on unit 'rabbitmq-server/2'    Upgrade 'rabbitmq-server' to the new channel: '3.9/stable'    Change charm config of 'rabbitmq-server' 'source' to 'cloud:focal-victoria'    Wait for up to 2400s for model 'test-model' to reach the idle state    Verify that the workload of 'rabbitmq-server' has been upgraded Continue (y/n): yUpgrade plan for 'rabbitmq-server' to 'victoria' ✔ ... # apply stepsUpgrade completed.