108 lines
3.3 KiB
Plaintext
108 lines
3.3 KiB
Plaintext
=head1 NAME
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B<geninitrd> - Generate an initrd (initial ramfs) which to be used for statefull install or stateless netboot.
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=head1 SYNOPSIS
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B<geninitrd> I<imagename> [B<--ignorekernelchk>]
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B<geninitrd> [B<-h> | B<--help>]
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=head1 DESCRIPTION
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Generate the initrd for the osimage: B<imagename> which is an xCAT object of I<osimage> type.
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B<Diskfull Osimage>
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=over 2
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If the B<imagename> is a statefull one (The provmethod attribute for the osimage is 'install'),
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this command is used to rebuild the initrd to inject the new drivers from driver rpms or
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'update distro' and copy the rebuilt initrd and new kernel (If there's new kernel in 'update
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distro') to the directory I</tftpboot/xcat/<imagename>>.
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If the initrd has been rebuilt by geninitrd, when run nodeset, the I<--noupdateinitrd> option
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should be used to skip the rebuilding of initrd to improve the performance.
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Three attributes of osimage object can be used to specify the Driver RPM location and Driver names
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for injecting new drviers to initrd.
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B<netdrivers> - comma separated driver names that need to be injected to the initrd.
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The postfix '.ko' can be ignored. The netdrivers attribute must be set to specify the new driver list.
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If you want to load all the drivers from the driver rpms, using the keyword allupdate.
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B<driverupdatesrc> - comma separated driver rpm packages (full path should be specified)
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B<osupdatename> - comma separated 'osdistroupdate' object. Each 'osdistroupdate' object specifies a
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Linux distro update. When run geninitrd, 'kernel-*.rpm' will be searched from osdistroupdate.dirpath
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to get all the rpm packages and then search the drivers from the rpm packages.
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Refer to the doc: Using_Linux_Driver_Update_Disk
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=back
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B<Stateless Osimage>
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=over 2
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If the B<imagename> is a stateless one (The provmethod attribute for the osimage is 'netboot'),
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this command is used to generate the initrd from the rootimg which generated by 'genimage' command.
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So the 'genimage' must be run once before running the geninitrd command.
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Two attributes of osimage object can be used to specify the Driver RPM location and Driver names
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for injecting new drviers to initrd.
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B<netdrivers> - comma separated driver names that need to be injected to the initrd.
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The postfix '.ko' can be ignored. The netdrivers attribute must be set to specify the new driver list.
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If you want to load all the drivers from the driver rpms, using the keyword allupdate.
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B<driverupdatesrc> - comma separated driver rpm packages (full path should be specified)
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=back
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=head1 Parameters
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I<imagename> specifies the name of an os image definition to be used. The specification for the image is storted in the I<osimage> table and I<linuximage> table.
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=over 12
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=item B<--ignorekernelchk>
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Skip the kernel version checking when injecting drivers from osimage.driverupdatesrc. That means all drivers from osimage.driverupdatesrc will be injected to initrd for the specific target kernel.
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=back
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=head1 RETURN VALUE
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0 The command completed successfully.
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1 An error has occurred.
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=head1 EXAMPLES
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=over 3
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=item 1
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To generate initrd for the osimage B<myimagename>:
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geninitrd myimagename
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=back
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=head1 FILES
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/opt/xcat/bin/geninitrd
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/opt/xcat/bin/genimage
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/opt/xcat/share/xcat/netboot/<OS>/genimage
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=head1 SEE ALSO
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L<geninitrd(1)|geninitrd.1>, L<genimage(1)|genimage.1>
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