Kickstart - Partitioning....possible to use whole disk for LVM without creating a LVM partition

[Jerry Billing]

Hi

My main question was if it is possible to use a whole disk using LVM 
without creating a seperate LVM partition in kickstart?  If you create a 
partition on the disk you can´t easily extend the disk by increasing the 
disk size in VMware. Then you have to add another disk and extend your 
volume group.
If you use the whole disk by initialize the disk using "pvcreate 
/dev/disk", it can easily be resized. I am not an expert on LVM so please 
correct me if I am wrong :)
Is it possible to use standard LVM commands in kickstart? As I understand 
you can just use part and logvol? By reading the manuls for theese 
commands I cannot find a solution for this.

I use the following commands in my kickstart file, and the partitioning 
script I presented in my first mail is included in the kickstart using the 
%include statement below.

zerombr
clearpart --all
bootloader --location=mbr --boot-drive=sda
%include /tmp/partitioning.cfg

By the way we are running Satellite 5.7.

Regards Jerry



From:   James Harrison <jamesaharrisonuk at yahoo.co.uk>
To:     Discussion list about Kickstart <kickstart-list at redhat.com>, 
Cc:     Anette Hagelin <anme06 at handelsbanken.se>
Date:   2015-03-09 16:29
Subject:        Re: Kickstart - Partitioning....possible to use whole disk 
for LVM without creating a LVM partition
Sent by:        kickstart-list-bounces at redhat.com



Hi,
>From what I remember,it depends on the use of the disk. If its a boot 
disk, you have to have one DOS boot partition to start the system. 
However, if the disk is a second disk, then the whole disk can be folded 
into LVM.

Thanks
James


On Monday, 9 March 2015, 14:18, Jerry Billing <jebi01 at handelsbanken.se> 
wrote:


Hi 

For virtual servers it is nice to use the whole disk for LVM instead of 
creating a LVM partition on the disk. Then you can just increase the size 
of the disk in VMware and later extend the file system instead of having 
to add another disk and extend. 
Is it possible to use this setup in the kickstart? What syntax do one use 
if it is possible? 

If I have done it manually it whould have been like this: 
pvcreate /dev/sdb (instead of using a LVM partition called /dev/sdb1) 
vgcreate DataVG /dev/sdb 
lvcreate -n DataLV -l 100%FREE DataVG DataLV 

At the moment I have the following partitioning script in my kickstart 
file for RHEL6/7 as a pre script: 

DISK_TYPE=$(parted -s /dev/sda print |grep Model | awk '{print $2}') 
echo "Disk type = $DISK_TYPE" 

if [ "$DISK_TYPE" = "VMware" ] 

then 
echo "This is a VMware server, disk type=$DISK_TYPE" 
cat > /tmp/partitioning.cfg <<EOF 
part /boot --fstype="xfs" --size=1024 --ondisk=sda 
part pv.01 --size=10240 --grow --ondisk=sda 
volgroup VGos pv.01 
logvol / --vgname=VGos --name=LVroot --size=10240 --grow 
logvol swap --vgname=VGos --name=LVswap --recommended 
part pv.02 --size=1000 --grow --ondisk=sdb 
volgroup VGdata pv.02 
logvol /usr/users --vgname=VGdata --name=LVhome --size=20480 
logvol /app --vgname=VGdata --name=LVapp --size=1000 --grow 
EOF 

else 
echo "This is a Physical server, disk type=$DISK_TYPE" 
cat > /tmp/partitioning.cfg <<EOF 
part /boot --fstype="xfs" --size=1024 --ondisk=sda 
part pv.01 --size=10240 --grow --ondisk=sda 
volgroup VGos pv.01 
logvol / --vgname=VGos --name=LVroot --size=10240 --grow 
logvol swap --vgname=VGos --name=LVswap --recommended 
logvol /var --vgname=VGos --name=LVvar --size=20480 
EOF 

fi 


Regards Jerry

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