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Avoid copying shim and grub on alpine rpi ()

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Itxaka 2024-07-15 09:32:00 +02:00 committed by GitHub
parent cf10aaa506
commit 773c29e5c0
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1 changed files with 43 additions and 37 deletions

80
pkg/utils/grub.go
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@ -169,6 +169,11 @@ func (g Grub) Install(target, rootDir, bootDir, grubConf, tty string, efi bool,
return err
}
flavor, err := utils.OSRelease("FLAVOR", filepath.Join(cnst.ActiveDir, "etc/os-release"))
if err != nil {
g.config.Logger.Warnf("Failed reading os-release from %s: %v", filepath.Join(cnst.ActiveDir, "etc/os-release"), err)
}
g.config.Logger.Debugf("Detected Flavor: %s", flavor)
// Copy needed files for efi boot
// This seems like a chore while we could provide a package for those bundled files as they are just a shim and a grub efi
// BUT this is needed for secureboot
@ -178,44 +183,45 @@ func (g Grub) Install(target, rootDir, bootDir, grubConf, tty string, efi bool,
// the kernel signature would be from fedora while the shim signature would be from ubuntu
// This is why if we want to support secureboot we need to copy the shim+grub from the rootfs default paths instead of
// providing a generic package
err = g.copyShim()
if err != nil {
return err
}
err = g.copyGrub()
if err != nil {
return err
}
// Add grub.cfg in EFI that chainloads the grub.cfg in recovery
// Notice that we set the config to /grub2/grub.cfg which means the above we need to copy the file from
// the installation source into that dir
grubCfgContent := []byte(fmt.Sprintf("search --no-floppy --label --set=root %s\nset prefix=($root)/%s\nconfigfile ($root)/%s/grub.cfg", stateLabel, systemgrub, systemgrub))
err = g.config.Fs.WriteFile(filepath.Join(cnst.EfiDir, "EFI/boot/grub.cfg"), grubCfgContent, cnst.FilePerm)
if err != nil {
return fmt.Errorf("error writing %s: %s", filepath.Join(cnst.EfiDir, "EFI/boot/grub.cfg"), err)
}
// Ubuntu efi searches for the grub.cfg file under /EFI/ubuntu/grub.cfg while we store it under /boot/grub2/grub.cfg
// workaround this by copying it there as well
// read the os-release from the rootfs to know if we are creating a ubuntu based iso
flavor, err := utils.OSRelease("FLAVOR", filepath.Join(cnst.ActiveDir, "etc/os-release"))
if err != nil {
g.config.Logger.Warnf("Failed reading os-release from %s: %v", filepath.Join(cnst.ActiveDir, "etc/os-release"), err)
}
g.config.Logger.Infof("Detected Flavor: %s", flavor)
if err == nil && strings.Contains(strings.ToLower(flavor), "ubuntu") {
g.config.Logger.Infof("Ubuntu based ISO detected, copying grub.cfg to /EFI/ubuntu/grub.cfg")
err = fsutils.MkdirAll(g.config.Fs, filepath.Join(cnst.EfiDir, "EFI/ubuntu/"), constants.DirPerm)
if err != nil {
g.config.Logger.Errorf("Failed writing grub.cfg: %v", err)
return err
}
err = g.config.Fs.WriteFile(filepath.Join(cnst.EfiDir, "EFI/ubuntu/grub.cfg"), grubCfgContent, constants.FilePerm)
if err != nil {
g.config.Logger.Errorf("Failed writing grub.cfg: %v", err)
return err
}
}
// Shim is not available in Alpine + rpi
model, err := utils.OSRelease("KAIROS_MODEL", filepath.Join(cnst.ActiveDir, "etc/os-release"))
if strings.Contains(strings.ToLower(flavor), "alpine") && strings.Contains(strings.ToLower(model), "rpi") {
g.config.Logger.Debug("Running on Alpine+RPI, not copying shim or grub.")
} else {
err = g.copyShim()
if err != nil {
return err
}
err = g.copyGrub()
if err != nil {
return err
}
// Add grub.cfg in EFI that chainloads the grub.cfg in state
// Notice that we set the config to /grub2/grub.cfg which means the above we need to copy the file from
// the installation source into that dir
grubCfgContent := []byte(fmt.Sprintf("search --no-floppy --label --set=root %s\nset prefix=($root)/%s\nconfigfile ($root)/%s/grub.cfg", stateLabel, systemgrub, systemgrub))
err = g.config.Fs.WriteFile(filepath.Join(cnst.EfiDir, "EFI/boot/grub.cfg"), grubCfgContent, cnst.FilePerm)
if err != nil {
return fmt.Errorf("error writing %s: %s", filepath.Join(cnst.EfiDir, "EFI/boot/grub.cfg"), err)
}
// Ubuntu efi searches for the grub.cfg file under /EFI/ubuntu/grub.cfg while we store it under /boot/grub2/grub.cfg
// workaround this by copying it there as well
// read the os-release from the rootfs to know if we are creating a ubuntu based iso
if strings.Contains(strings.ToLower(flavor), "ubuntu") {
g.config.Logger.Infof("Ubuntu based ISO detected, copying grub.cfg to /EFI/ubuntu/grub.cfg")
err = fsutils.MkdirAll(g.config.Fs, filepath.Join(cnst.EfiDir, "EFI/ubuntu/"), constants.DirPerm)
if err != nil {
g.config.Logger.Errorf("Failed writing grub.cfg: %v", err)
return err
}
err = g.config.Fs.WriteFile(filepath.Join(cnst.EfiDir, "EFI/ubuntu/grub.cfg"), grubCfgContent, constants.FilePerm)
if err != nil {
g.config.Logger.Errorf("Failed writing grub.cfg: %v", err)
return err
}
}
}
}
return nil