[et-mgmt-tools] Kernel Parameter Space Limits...

[Michael DeHaan]

Ken Robson wrote:
> Hi Folks,
>
> When evaluating Cobbler I noticed that it seems to be unaware of the maximum
> space limit for kernel parameters.  

Do you know what the actual limit is?  I'll admit I don't, and I haven't 
seen this before...   Could this be syslinux causing trouble and not the 
actual kernel?

The "append" stuff can certainly be removed.

> Cobbler seems to generate a very large
> but highly meaningful parameters.  This instantly caused me issues with my
> ks= directive being truncated and my install failing.  My distributions file
> looks like:
>
> ---
> -
>     arch: x86
>     breed: redhat
>     initrd:
> /var/www/cobbler/ks_mirror/redhat.fedora.6.core/cdrom/images/pxeboot/initrd.
> img
>     kernel:
> /var/www/cobbler/ks_mirror/redhat.fedora.6.core/cdrom/images/pxeboot/vmlinuz
>     kernel_options: {}
>     ks_meta: {}
>     name:
> var_www_cobbler_ks_mirror_redhat.fedora.6.core_cdrom_images_pxeboot
> -
>     arch: x86
>     breed: redhat
>     initrd:
> /var/www/cobbler/ks_mirror/redhat.fedora.6.core/cdrom/images/xen/initrd.img
>     kernel:
> /var/www/cobbler/ks_mirror/redhat.fedora.6.core/cdrom/images/xen/vmlinuz
>     kernel_options: {}
>     ks_meta: {}
>     name: var_www_cobbler_ks_mirror_redhat.fedora.6.core_cdrom_images_xen
>
> The errant /tftpboot/pxelinux.cfg/default files looks like:
>
>     default linux
>     prompt 0
>     timeout 1
>     label linux
>         kernel
> /images/var_www_cobbler_ks_mirror_redhat.fedora.6.core_cdrom_images_pxeboot/
> vmlinuz
>         append ksdevice=eth0 lang=en_US text syslog=192.168.1.133:25150
> devfs=nomount ramdisk_size=16438 append
>  
> initrd=/images/var_www_cobbler_ks_mirror_redhat.fedora.6.core_cdrom_images_p
> xeboot/initrd.img
>         ks=http://192.168.1.133/cobbler_track/kickstarts_sys/default/ks.cfg
>
> And the settings file created by the import looks like:
>
> ---
>     bootloaders:
>         ia64: /var/lib/cobbler/elilo-3.6-ia64.efi
>         standard: /usr/lib/syslinux/pxelinux.0
>     default_kickstart: /etc/cobbler/default.ks
>     dhcpd_bin: /usr/sbin/dhcpd
>     dhcpd_conf: /etc/dhcpd.conf
>     httpd_bin: /usr/sbin/httpd
>     kernel_options:
>         append: ~
>         devfs: nomount
>         ksdevice: eth0
>         lang: en_US
>         ramdisk_size: 16438
>         text: ~
>     koan_path: /usr/bin/koan
>     manage_dhcp: 1
>     minimize_syncs: 1
>     next_server: '192.168.1.133'
>     server: '192.168.1.133'
>     syslog_port: 25150
>     tftpboot: /tftpboot
>     tftpd_bin: /usr/sbin/in.tftpd
>     tftpd_conf: /etc/xinetd.d/tftp
>     webdir: /var/www/cobbler
>
> When I try to kickstart using this set-up the append line get truncated and
> the install fails.  If I alter the settings file to the following it works
> fine:
>
>     ---
>     bootloaders:
>         ia64: /var/lib/cobbler/elilo-3.6-ia64.efi
>         standard: /usr/lib/syslinux/pxelinux.0
>     default_kickstart: /etc/cobbler/default.ks
>     dhcpd_bin: /usr/sbin/dhcpd
>     dhcpd_conf: /etc/dhcpd.conf
>     httpd_bin: /usr/sbin/httpd
>     kernel_options:
>         devfs: nomount
>         ksdevice: eth0
>         lang: en_GB
>         ramdisk_size: 16438
>         text: ~
>      koan_path: /usr/bin/koan
>      manage_dhcp: 1
>      minimize_syncs: 1
>      next_server: '192.168.1.133'
>      server: '192.168.1.133'
>      syslog_port: 25150
>      tftpboot: /tftpboot
>      tftpd_bin: /usr/sbin/in.tftpd
>      tftpd_conf: /etc/xinetd.d/tftp
>      webdir: /var/www/cobbler
>
> Thanks for your help.
>
> Kind regards,
>
> Ken.
>   
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