schubi2 / zypp-boot-plugin

Zypper plugin for setting boot options after package installation

zypp-boot-plugin

This Zypp plugin will be called after each package installation/update with will be done by applications which uses libzypp. If needed the plugin creates the file /run/reboot-needed which indicates for other applications, that a reboot is needed.

There are different boot levels which will be stored in the /run/reboot-needed as an normal ASCII string:

• reboot Hard reboot
• kexec Booting a new kernel without initializing hardware and without using any bootloader like Grub2.
• soft-reboot Soft reboot done by E.G. systemctl soft-reboot

Evaluating the needed Boot-Level

The plugin is getting a list of fresh installed/updated packages. The plugin checks for each package if a reboot is needed:

1. The plugin checks if the installed/updated package is in the package list defined in /usr/etc/zypp/zypp-boot-plugin.conf:

   ## Configuration file for zypp-boot-plugin plugin.
   ## /usr/etc/zypp/zypp-boot-plugin.conf
   ##
   ## This configuration file defines packages for which a reboot
   ## is needed after they have been installed/updated.
   
   [main]
   
   ##
   ## Packages for which a hard reboot is needed after they have been
   ## installed or updated.
   ##
   ## Packages are selected either by name, or by provides. In the later case
   ## the string must start with "provides:" immediately followed by the capability.
   ##
   ## Example:
   ##	foo				- just packages whith name 'foo'
   ##	provides:bar                    - all packages providing 'bar'
   ##
   ## Valid values:
   ##	Comma separated list of packages.
   ##
   ## Default value:
   ##	empty
   ##
   reboot = grub2, glibc
   
   ##
   ## Packages for which a kexec call is needed at least after they have been
   ## installed or updated.
   ##
   ## Packages are selected either by name, or by provides. In the later case
   ## the string must start with "provides:" immediately followed by the capability.
   ##
   ## Example:
   ##	foo				- just packages whith name 'foo'
   ##	provides:bar                    - all packages providing 'bar'
   ##
   ## Valid values:
   ##	Comma separated list of packages.
   ##
   ## Default value:
   ##	empty
   ##
   kexec = multiversion(kernel)
   
   ##
   ## Packages for which a soft reboot is needed at least after they have been
   ## installed or updated.
   ##
   ## Packages are selected either by name, or by provides. In the later case
   ## the string must start with "provides:" immediately followed by the capability.
   ##
   ## Example:
   ##	foo				- just packages whith name 'foo'
   ##	provides:bar                    - all packages providing 'bar'
   ##
   ## Valid values:
   ##	Comma separated list of packages.
   ##
   ## Default value:
   ##	empty
   ##
   soft-reboot = libopenssl  
   
   

2.If an fresh installed/updated package is not defined in /usr/etc/zypp/zypp-boot-plugin.conf the provides dependency of this package will be checked for the tag installhint(reboot-needed). If this dependency has been defined, a hard reboot will be done.

Additional, the kind of reboot can also be set by E.G. installhint(reboot-needed) = kexec which is "weaker" than a hard reboot.

The result will be a list of packages together with the kind of needed boot-level. This list is the base of evaluating the correct entry in /run/reboot-needed where the "strongest" boot process in the list will be taken:

1. reboot
2. kexec
3. soft-boot