So, I've got a server running Scientific Linux 6.9 that I want to install 7 on. Upgrades are apparently not supported, so I need to do a clean install, which is fine.
I installed the SL6 server using Kickstart, with these options:
...
zerombr
bootloader --location=mbr --driveorder=sda --append="crashkernel=auto rhgb vga=788"
clearpart --all --drives=sda
part /boot --fstype=ext4 --size=500
part pv.008002 --grow --size=1
volgroup vg_main --pesize=4096 pv.008002
logvol / --fstype=ext4 --name=lv_root --vgname=vg_main --size=8192
logvol /home --fstype=ext4 --name=lv_home --vgname=vg_main --fsoptions="usrquota" --size=8192 --grow
logvol swap --name=lv_swap --vgname=vg_main --size=1024
...
I only want to preserve only the /home LV during the new install. I've read about the --noformat option in the documentation, but it can be applied to the partition, volume group, and logical volume configurations. I'm not clear on which level I should use it and, more importantly, how it will identify the structures in question.
Thankfully this is a VM, so I have snapshots to fall back on, but I'd rather not waste too much time on that. So, what options should I use for the SL7 install to ensure that /home is untouched?
Output of fdisk -l if it's helpful:
Disk /dev/sda: 268.4 GB, 268435456000 bytes
255 heads, 63 sectors/track, 32635 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000852f6
Device Boot Start End Blocks Id System
/dev/sda1 * 1 64 512000 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 64 32636 261630976 8e Linux LVM
Disk /dev/mapper/vg_main-lv_root: 8589 MB, 8589934592 bytes
255 heads, 63 sectors/track, 1044 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_main-lv_swap: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/vg_main-lv_home: 258.2 GB, 258243297280 bytes
255 heads, 63 sectors/track, 31396 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
And output of vgdisplay -v:
Using volume group(s) on command line.
--- Volume group ---
VG Name vg_main
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 3
Open LV 3
Max PV 0
Cur PV 1
Act PV 1
VG Size 249.51 GiB
PE Size 4.00 MiB
Total PE 63874
Alloc PE / Size 63874 / 249.51 GiB
Free PE / Size 0 / 0
VG UUID T03S3I-cgaj-A2OY-1e9d-FBiQ-8xpJ-NN3hUo
--- Logical volume ---
LV Path /dev/vg_main/lv_root
LV Name lv_root
VG Name vg_main
LV UUID FPXNoA-pqjg-Krbx-O5Sn-jFzg-GGsb-Ual7ww
LV Write Access read/write
LV Creation host, time rainicorn.domain.internal, 2014-06-05 14:12:41 -0400
LV Status available
# open 1
LV Size 8.00 GiB
Current LE 2048
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg_main/lv_home
LV Name lv_home
VG Name vg_main
LV UUID E38kVe-nxYm-rKop-Gwka-80Lh-T2VF-vGUkHE
LV Write Access read/write
LV Creation host, time rainicorn.domain.internal, 2014-06-05 14:12:44 -0400
LV Status available
# open 1
LV Size 240.51 GiB
Current LE 61570
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/vg_main/lv_swap
LV Name lv_swap
VG Name vg_main
LV UUID HoZ84h-eXye-lgNw-ggTN-YIEc-X0fZ-ZLcRCo
LV Write Access read/write
LV Creation host, time rainicorn.domain.internal, 2014-06-05 14:13:07 -0400
LV Status available
# open 1
LV Size 1.00 GiB
Current LE 256
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Physical volumes ---
PV Name /dev/sda2
PV UUID shdyY0-fhMC-c7kB-LoKG-Jlk8-qN81-14toG3
PV Status allocatable
Total PE / Free PE 63874 / 0
This is what ended up working for me in my SL7 kickstart file. The
partdirective has an--onpartoption to specify what drive to look for the partition on, and the rest seem to figure it out from there. Some judicious use of--useexistingand--noformatensured my data was waiting for me after install.