Adds automatic (daily) backups

[bravo-kernel]

This PR adds a provisioning script that installs multibackup and configures it to automatically create daily backups of useful files (stored on your local machine for safe keeping).

Enabling

To enable the automatic backups:

1. cd to the cakebox folder on your local machine
2. git pull
3. vagrant reload --provision

If things went well you should see vagrant provisioning feedback similar to:

==> default: ---------------------------------------------------------------
==> default: Checking automated backups
==> default: ---------------------------------------------------------------
==> default: * Installing multibackup
==> default: Cloning into 'tar-multibackup'...
==> default: * Placing default configuration file
==> default: * Setting configuration file permissions
==> default: * Creating daily cron job
==> default: Installation completed successfully!

Configuration

Only folders specified in ~/.multibackup.conf will be included in the backups. The default configuration file will backup:

• all app.php and .env configuration files found in /home/vagrant (recursively)
• the full database server with all databases (using Percona Xtrabackup)
• /etc/nginx
• /home/vagrant/.cakebox

Good to know:

• backups can be found on your local machine in the /.cakebox/backups folder
• backup retention: 90 days
• to manually start the backup run sudo multibackup inside your box
• backups are created daily at 5:00 AM. To change:
  • edit /etc/cron.d/backup-liveconfig (visit crontab guru for help)
  • reload cron by running sudo service cron reload

Refs #16 and frdmn/tar-multibackup#4.