Help about partition layout Proxmox 1.7

[johjoh]

Hi, I need help to modify the partitioning layout that ProxMox create automatically.

I have one controller hardware RAID, with 2 separated RAID volume:
- the first of 145 GB
- the second of 900 GB
when I have installed Proxmox it taken only /dev/sda, is there a way to change the layout from:
/dev/pve/swap on pve on /dev/sda2 16.88 GB
/dev/pve/root on pve on /dev/sda2 33.75 GB
/dev/pve/data on pve on /dev/sda2 80.56 GB

to:
/dev/pve/swap on pve on /dev/sda2 16.88 GB
/dev/pve/root on pve all remaining on /dev/sda2
and
/dev/pve/data on pve2 on /dev/sdb1 all space

Someone can explane me how to change?
Thank you

 

[udo]

Hi, I need help to modify the partitioning layout that ProxMox create automatically.

I have one controller hardware RAID, with 2 separated RAID volume:
- the first of 145 GB
- the second of 900 GB
when I have installed Proxmox it taken only /dev/sda, is there a way to change the layout from:
/dev/pve/swap on pve on /dev/sda2 16.88 GB
/dev/pve/root on pve on /dev/sda2 33.75 GB
/dev/pve/data on pve on /dev/sda2 80.56 GB

to:
/dev/pve/swap on pve on /dev/sda2 16.88 GB
/dev/pve/root on pve all remaining on /dev/sda2
and
/dev/pve/data on pve2 on /dev/sdb1 all space

Someone can explane me how to change?
Thank you

Hi,
with a little trick it's easy. But you should know a little bit about lvm (man lvm).
I assume, that you don't have much things on /var/lib/vz

# first shutdown all VMs
# then backup /var/lib/vz/
cd /var/lib/vz
tar cvf /root/var_lib_vz.tar .
cd
umount /var/lib/vz
#
# look on your lvm:
pvdisplay
vgdisplay
lvdisplay
 # now remove data
lvchange -a n /dev/pve/data
lvremove /dev/pve/data
#
# create an dummy lv which occupied the whole space. Look for free extents:
vgdisplay
lvcreate -l 28596 -n dummy pve               # in this case the vg has 28596 free extends
#
# control:
vgdisplay

# if there no free extends, simply add sdb1
# create partitiontable on sdb with partition 1 type 8e
pvcreate /dev/sdb1
vgextend pve /dev/sdb1

# control:
vgdisplay

# now create new data:
lvcreate -l XXXXXX -n data pve
mkfs.ext3 /dev/pve/data
mount /var/lib/vz
cd /var/lib/vz
tar xvf /root/var_lib_vz. tar

# remove dummy-lv
lvremove /dev/pve/dummy

After that, you can use the space in the vg pve, but leave min. 4G free for backup (snapshot).

Udo

 

[johjoh]

Thank you UDO, thank you UDO, thank you UDO, thank you UDO, thank you UDO, thank you UDO, thank you UDO, thank you UDO!
You're simply the best!

Only a last question how to extend /dev/pve/root to use the remaining space, instead of creating /dev/pve/dummy and after remove /dev/pve/dummy?
The final result would be:
/dev/pve/swap 16.88 GB of /dev/sda2
/dev/pve/root 33.75+80.56 GB of /dev/sda2

/dev/pve/data 100% of /dev/sdb1

Thank you again

 

[udo]

...
Only a last question how to extend /dev/pve/root to use the remaining space, instead of creating /dev/pve/dummy and after remove /dev/pve/dummy?
...

Hi,
you can expand a logical volume. Look with vgdisplay how much free space you have and then expand like this (in this case add 20GB to root):

df -k /dev/pve/root
vgdisplay pve
lvextend -L +20G /dev/pve/root
resize2fs /dev/pve/root
df -k /dev/pve/root

But be sure, that you leave min. 4GB free (a little bit more is not bad) or you run in trouble with backup.
To expand (online) is very easy - shrinking not (without data-loss).

Udo