/01-preseed-LVM-on-software-RAID.sh
Last active Dec 14, 2015
# This is a preseed partman recipe that will later allow the created on # LVM-on-software-RAID, somethat that wasn't possible directly in the # preseed at the time (~2003)
| # This is a preseed partman recipe that will later allow the created on | |
| # LVM-on-software-RAID, somethat that wasn't possible directly in the | |
| # preseed at the time (~2003) | |
| d-i lvmcfg/activevg boolean false | |
| d-i lvmcfg/vgdelete_names select vg00 | |
| d-i lvmcfg/vgcreate_name string vg00 | |
| d-i lvmcfg/vgdelete_confirm boolean true | |
| d-i partman-auto/method string lvm | |
| d-i partman-lvm/device_remove_lvm boolean true | |
| d-i partman-md/device_remove_md boolean true | |
| d-i partman-lvm/confirm boolean true | |
| d-i partman-md/confirm boolean true | |
| d-i partman-auto/disk string /dev/sda | |
| # the entire drive has to be allocated using a preseed partman recipe, | |
| # so create “/tmp/removeme” at the end to leave some free space in the VG | |
| d-i partman-auto/expert_recipe string host3 :: | |
| 200 200 200 ext3 \ | |
| $primary{ } $bootable{ } \ | |
| method{ format } format{ } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| mountpoint{ /boot } . \ | |
| 512 512 512 \ | |
| linux-swap $primary{ } \ | |
| method{ swap } \ | |
| format{ } . \ | |
| 100 1000000 1000000000 ext3 \ | |
| method{ lvm } \ | |
| use_filesystem{ } \ | |
| format{ } \ | |
| vg_name{ vg00 } . \ | |
| 5120 5120 5120 ext3 \ | |
| $lvmok{ } \ | |
| in_vg{ vg00 } \ | |
| lv_name{ usr } \ | |
| method{ format } \ | |
| format{ } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| mountpoint{ /usr } . \ | |
| 5120 5120 5120 ext3 \ | |
| $lvmok{ } \ | |
| in_vg{ vg00 } \ | |
| lv_name{ slash } \ | |
| method{ format } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| mountpoint{ / } . \ | |
| 5120 5120 5120 ext3 \ | |
| $lvmok{ } \ | |
| in_vg{ vg00 } \ | |
| lv_name{ var } \ | |
| method{ format } \ | |
| format{ } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| format{ } \ | |
| mountpoint{ /var } . \ | |
| 2048 2048 2048 ext3 \ | |
| $lvmok{ } \ | |
| in_vg{ vg00 } \ | |
| lv_name{ tmp } \ | |
| method{ format } \ | |
| format{ } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| mountpoint{ /tmp } . \ | |
| 512 512 512 ext3 \ | |
| $lvmok{ } \ | |
| in_vg{ vg00 } \ | |
| lv_name{ home } \ | |
| method{ format } \ | |
| format{ } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| mountpoint{ /home } . \ | |
| 512 61440 1000000000 ext3 \ | |
| $lvmok{ } \ | |
| in_vg{ vg00 } \ | |
| lv_name{ removeme } \ | |
| method{ format } \ | |
| format{ } \ | |
| use_filesystem{ } \ | |
| filesystem{ ext3 } \ | |
| mountpoint{ /tmp/removeme } . \ | |
| d-i partman/confirm_write_new_label boolean true | |
| d-i partman/choose_partition select finish | |
| d-i partman/choose_partition select Finish partitioning and write changes to disk | |
| d-i partman/confirm boolean true |
| #!/bin/bash | |
| # Once the base OS is installed, the machine reboots; the admin then logs in as root using | |
| # a known password defined in the preseed, changes the password, and then runs partman.sh | |
| # to start the final configuration process. | |
| # | |
| # If there were such a thing as the Hack of the Year award, this config script would have | |
| # been a contender. Since drive SDA is in use, we can’t effectively release it for | |
| # partitioning until we reboot using the other drive. We’ve already created our LVM setup | |
| # using the preseed; this script: | |
| # | |
| # 1. creates broken software RAID mirrors using only the partitions in SDB (creating md0 | |
| # and md1 as RAID devices), | |
| # 2. migrates the data in /boot from sda1 to md0, | |
| # 3. initializes md1 as a physical volume for LVM, | |
| # 4. migrates the physical extents from PV sda2 to PV md1, | |
| # 5. removes PV sda2 from the volume group, | |
| # 6. removes references to sda in fstab, | |
| # 7. runs the bootloader to rebuild the initrd with the software RAID module, and | |
| # 8. reboots to fully release sda. | |
| # | |
| # Remember, this was all to get around the fact that you can’t create LVM-on-software-RAID | |
| # using a preseed. | |
| # | |
| # Also, at the time this was written, booting LVM from GRUB was as bad idea, if it was | |
| # even possible. | |
| # | |
| # enable the boot log | |
| sed -i -e "s/BOOTLOGD_ENABLE=No/BOOTLOGD_ENABLE=Yes/" /etc/default/bootlogd | |
| # deactive all swap partitions so we're not holding any open, then delete | |
| # the swap line on sda to free the disk for repartitioning later | |
| swapoff -a | |
| sed -i -e "/swap/d" /etc/fstab | |
| # remove the dummy LV to speed the PV migration | |
| umount /tmp/removeme | |
| rm -rf /tmp/removeme | |
| sed -i -e "/removeme/d" /etc/fstab | |
| lvchange -a n /dev/vg00/removeme | |
| lvremove /dev/vg00/removeme | |
| # partition SDB | |
| sfdisk /dev/sdb << EOF | |
| ,24,fd,* | |
| ,62,82 | |
| ,,fd | |
| EOF | |
| # SDB needs swap, and RAID partitions | |
| # create md1 first to ensure it's ready when we provision it as a PV mkswap /dev/sdb2 | |
| echo "/dev/sdb2 none swap sw 0 0" >>/etc/fstab | |
| mdadm -C /dev/md1 --run -n 2 -l 1 /dev/sdb3 missing | |
| mdadm -C /dev/md0 --run -n 2 -l 1 /dev/sdb1 missing | |
| # sleep for a bit to ensure arrays created | |
| sleep 10 | |
| # migrate the LVs from SDA to SDB | |
| pvcreate /dev/md1 | |
| vgextend vg00 /dev/md1 | |
| pvmove /dev/sda5 | |
| vgreduce vg00 /dev/sda5 | |
| pvremove /dev/sda5 | |
| # resize /home | |
| lvextend -L 60g /dev/vg00/home | |
| resize2fs /dev/vg00/home | |
| # copy /boot to SDB | |
| mke2fs -j /dev/md0 | |
| mount /dev/md0 /mnt/ | |
| cp -ax /boot/* /mnt/ | |
| umount /boot | |
| umount /mnt | |
| mount /dev/md0 /boot | |
| sed -i -e 's/sda1/md0/' /etc/fstab | |
| # wipe SDA's partition table | |
| dd if=/dev/zero of=/dev/sda count=1 bs=512 | |
| # setup mdadm.conf | |
| echo "DEVICE partitions" >/etc/mdadm/mdadm.conf | |
| echo "CREATE owner=root group=disk mode=0660 auto=yes" >>/etc/mdadm/mdadm.conf | |
| echo "HOMEHOST <system>" >>/etc/mdadm/mdadm.conf | |
| echo "MAILADDR user1@domain.com,user2@domain.com" >>/etc/mdadm/mdadm.conf | |
| mdadm --detail --scan >>/etc/mdadm/mdadm.conf | |
| # fix a known bug in mdadm - "--detail --scan" outputs metadata version 00.90, should be 0.90 | |
| sed -i -e "s/metadata=00.90/metadata=0.90/" /etc/mdadm/mdadm.conf | |
| # rebuild the ramdisk to include the MDADM module update-initramfs -uk all | |
| lilo -H | |
| # reboot | |
| shutdown -r now |
| #!/bin/bash | |
| # This script duplicates the partition table from sdb to sda, then adds the RAID | |
| # components from SDA to the mirror set. LVM metadata is stored on the RAID set, so we | |
| # don’t need to worry about losing any configs in that regard. | |
| # | |
| # This is can be run manually after a reboot, but automated in some other way | |
| # add SDA to the RAID mirrors | |
| sfdisk -d /dev/sdb | sfdisk /dev/sda | |
| echo "/dev/sda2 none swap sw 0 0" >>/etc/fstab | |
| mdadm -a /dev/md0 /dev/sda1 | |
| mdadm -a /dev/md1 /dev/sda3 | |
| sleep 10 | |
| lilo |
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