See also Command reference.
> ubos-admin restore <arguments>
supports a number of different use cases:
- Restore all sites and all apps contained in the backup to the same configuration as at the time of the backup. This includes hostnames, context paths, other customization, and even TLS keys and certificates (assuming the backup file contains all of those)
- Restore only some sites or apps contained in the backup.
- Restore sites or apps to different hostnames and/or context paths than they had been deployed to at the time the backup was created.
- Restore an app and its data, installed at one site, to a different site.
To see the supported options, invoke ubos-admin restore --help.
Generally, UBOS performs the following actions:
- It examines the meta-data contained in the backup file, to determine which apps and accessories are required to use the to-be-restored data.
- It installs those apps and accessories. Depending on the command-line options, this may involve creating an entirely new site, or modifying an existing site.
- While a new site is created or an existing site is modified, UBOS suspends the site and replaces it with a placeholder page.
- UBOS walks through the UBOS Manifest of the involved apps and accessories, and restores each of the AppConfigurationItems whose retention fields have been set. (See also ubos-admin backup.)
- The actual restore performed depends on the type of AppConfigurationItem. For example, a MySQL database will be created and imported, while files and directories are simply copied into the right place.
- The app’s and accessories’ upgraders are run (see Roles section), so the imported data can be migrated to the structure needed by the current versions of the apps and accessories. This supports the situation where the backup was created with an older version of an app than it currently installed on the device.
- The site is resumed, and the placeholder is removed.
This command internally uses a plug-in architecture, which allows the support of alternate backup formats without changing the invocation by the user.
See also: ubos-admin backup.