dynamic partition size in a kickstart file

[Oguz Yilmaz]

Firas,
Bypassing anaconda is a very good idea. Thank you for this important clue.
--
Oguz YILMAZ


On Wed, Jul 23, 2014 at 7:44 PM, Firas Alshafei
<Firas.Alshafei at ventyx.abb.com> wrote:
> Oguz,
>
> I was doing something similar in my RHEL 5.8 kickstart.
>
> In the pre-script I have a function that calculates swap space based on RAM available:
> function func_dynamic_swap(){
> # Determine the ammount of RAM available
> mem_size_kb=`cat /proc/meminfo | grep MemTotal | awk '{print $2}'`
>
> # Determing the amount of GB RAM - AWK is used to round up since meminfo doesn't provide accurate info
> mem_size_gb=`awk -v MSZKB=$mem_size_kb 'BEGIN{printf("%.2f\n",(MSZKB/1024/1024))}' | awk '{printf("%d\n",$1+0.5)}'`
>
> # Set swap value depending on RAM. If RAM is 16GB or
> if [ $mem_size_gb -ge 16 ]; then
>         dyn_swap=$(( ( $mem_size_gb + 2 ) * 1024 ))
> else
>         dyn_swap=$(( 16 * 1024 ))
> fi
>
> echo $dyn_swap
> }
>
> That should return the value I want. I then use it in another function to create the partitioning
>     # Set disk sizing values
>     sizeOverhead=200
>     sizeSwap=$(func_dynamic_swap)
>     sizeRoot=20480
>     sizeVar=5120
>     sizeUsers=39936
>
>     # Create boot partition
>     echo "part /boot --fstype ext4 --size $sizeBoot --asprimary --ondisk $disk1"                   >> /tmp/disk-config.ks
>     # Partition Disk1
>     echo "part pv.1 --size=1 --grow --ondisk $disk1"                                               >> /tmp/disk-config.ks
>     # Create Volume Group
>     echo "volgroup VG1 --pesize $sizePeKB pv.1"                                                    >> /tmp/disk-config.ks
>     # Create logical volumes
>     echo "logvol   swap       --fstype swap --name lv_swap  --vgname VG1 --size=$sizeSwap"         >> /tmp/disk-config.ks
>     echo "logvol   /          --fstype ext4 --name lv_root  --vgname VG1 --size=$sizeRoot "        >> /tmp/disk-config.ks
>     echo "logvol   /var       --fstype ext4 --name lv_var   --vgname VG1 --size=$sizeVar "         >> /tmp/disk-config.ks
>     echo "logvol   /usr/users --fstype ext4 --name lv_users --vgname VG1 --size=$sizeUsers "       >> /tmp/disk-config.ks
>
> and call that disk-config.ks file in your kickstart file
> ################################################################################
> # DISK CONFIGURATION
> ################################################################################
> #System bootloader configuration
> bootloader --location=mbr
> # Clear the Master Boot Record
> zerombr
> %include /tmp/abb-disk-config
>
> Hope that helps :)
>
> FIRAS ALSHAFEI
> Lead Engineer
> Email: firas.alshafei at ventyx.abb.com
> (O) +1-281-274-5023
> (M) +1-330-647-6477
> VENTYX
> An ABB Company
> www.ventyx.com
> 1601 Industrial Blvd. | Sugar Land TX 77478 | U.S.A.
>
> -----Original Message-----
> From: kickstart-list-bounces at redhat.com [mailto:kickstart-list-bounces at redhat.com] On Behalf Of Oguz Yilmaz
> Sent: Wednesday, July 23, 2014 6:13 AM
> To: Discussion list about Kickstart
> Subject: dynamic partition size in a kickstart file
>
> Hello
>
> I want to dynamically set tmpfs size acc.to the ram the server has in my kickstart. Is there a way for such dynamic value setting?
>
> Best Regards,
>
> --
> Oguz YILMAZ
>
> _______________________________________________
> Kickstart-list mailing list
> Kickstart-list at redhat.com
> https://www.redhat.com/mailman/listinfo/kickstart-list
>
> _______________________________________________
> Kickstart-list mailing list
> Kickstart-list at redhat.com
> https://www.redhat.com/mailman/listinfo/kickstart-list