Procédure d'installation d'un OVH-STOR-2 en serveur de backup
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#!/bin/bash
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# Script vérifié le 2021-03-29 par jlecour
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# Le script suppose que :
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# * il y a 1 disque NVMe
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# * il y a 4 disques SATA en RAID soft
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# * le serveur boot en EFI
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# * on va reconstruire toute la table de partitionnement (GPT) du serveur
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# * le volume "rootfs" actuel est /dev/md127
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# Enfin un fstab est généré, le raid est configuré, lvm2 est installé,
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# grub et le kernel sont réinstallés.
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# Avant de commencer, consulter les disques pour vérifier les noms
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lsblk
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################################################################################
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#
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# À partir de là, le script *peut* être copié/collé en un bloc
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# Mais bien vérifier l'état au fur et à mesure
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# utilisez "set -e" si vous copiez/collez des bouts de scripts et souhaitez
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# un arrêt en cas d'erreur. Si vous le faites dans le shell de votre session SSH
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# elle s'interrompra !
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# set -e
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export LC_ALL=C
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swapoff -a
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sleep 1
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cd /mnt
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mkdir root_in_ram rootfs home var usr srv
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mount -t tmpfs none /mnt/root_in_ram -o size=90%
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mount /dev/md127 /mnt/rootfs/
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sleep 1
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rsync -a /mnt/rootfs/ /mnt/root_in_ram/
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sleep 1
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umount /mnt/rootfs
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sleep 1
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# Stop arrays and destroys partitions
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mdadm --stop /dev/md127
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sleep 1
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# Create a GPT label. (Removes all parts).
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parted -s /dev/nvme0n1 mklabel gpt
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sleep 1
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# BOOT EFI *mandatory* 100 Mo
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parted -a minimal -s /dev/nvme0n1 mkpart ESP fat32 0M 100M
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sleep 1
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parted -s /dev/nvme0n1 set 1 esp on
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sleep 1
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parted -s /dev/nvme0n1 set 1 boot on
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sleep 1
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mkfs.vfat -F32 /dev/nvme0n1p1 >/dev/null
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sleep 1
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fatlabel /dev/nvme0n1p1 EFI_SYSPART
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sleep 1
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# /boot
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parted -a minimal -s /dev/nvme0n1 mkpart primary ext4 100M 600M
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sleep 1
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parted -s /dev/nvme0n1 set 2 boot on
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sleep 1
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# /
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parted -a minimal -s /dev/nvme0n1 mkpart primary ext4 600M 1600M
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sleep 1
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# /usr
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parted -a minimal -s /dev/nvme0n1 mkpart primary ext4 1600M 7600M
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sleep 1
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# swap
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parted -a minimal -s /dev/nvme0n1 mkpart primary ext4 7600M 8100M
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sleep 1
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parted -a minimal -s /dev/nvme0n1 mkpart primary ext4 8100M 8600M
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sleep 1
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# LVM
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parted -a minimal -s /dev/nvme0n1 mkpart primary ext4 8600M 100%
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sleep 1
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# Backup
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parted -s /dev/sda mklabel gpt
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parted -a minimal -s /dev/sda mkpart primary ext4 0 100%
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parted -s /dev/sda set 1 raid on
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# Copy partitions to second disk
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sgdisk -R=/dev/sdb /dev/sda
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sleep 1
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sgdisk -G /dev/sdb
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# Copy partitions to third disk
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sgdisk -R=/dev/sdc /dev/sda
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sleep 1
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sgdisk -G /dev/sdc
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sleep 1
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# Copy partitions to fourth disk
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sgdisk -R=/dev/sdd /dev/sda
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sleep 1
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sgdisk -G /dev/sdd
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sleep 1
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# RAID6 for /backup
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mdadm --create /dev/md0 --level=6 --raid-devices=4 /dev/sda1 /dev/sdb1 /dev/sdc1 /dev/sdd1
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sleep 1
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mkfs.ext4 -LROOTFS /dev/nvme0n1p3 >/dev/null
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sleep 1
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mkfs.ext4 -LBOOT /dev/nvme0n1p2 >/dev/null
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sleep 1
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mkfs.ext4 -LUSR /dev/nvme0n1p4 >/dev/null
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sleep 1
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mkswap -f -LSWAP1 /dev/nvme0n1p5
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sleep 1
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mkswap -f -LSWAP2 /dev/nvme0n1p6
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sleep 1
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# Add LVM with a VG for all of the free space.
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pvcreate /dev/nvme0n1p7
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sleep 1
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vgcreate vg0 /dev/nvme0n1p7
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sleep 1
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lvcreate --size 1G --name tmp vg0
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sleep 1
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mkfs.ext4 -LTMP /dev/mapper/vg0-tmp >/dev/null
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sleep 1
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lvcreate --size 10G --name var vg0
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sleep 1
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mkfs.ext4 -LVAR /dev/mapper/vg0-var >/dev/null
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sleep 1
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lvcreate -l 50%FREE --name home vg0
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sleep 1
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mkfs.ext4 -LHOME /dev/mapper/vg0-home >/dev/null
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sleep 1
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# LUKS for /backup
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apt install cryptsetup
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cryptsetup --verbose --verify-passphrase luksFormat /dev/md0
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sleep 1
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cryptsetup luksOpen /dev/md0 backup
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sleep 1
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mkfs.ext4 -LBACKUP /dev/mapper/backup >/dev/null
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sleep 1
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# Copy data from RAM.
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mount -LROOTFS rootfs
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mkdir -p rootfs/home && mount -LHOME rootfs/home
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mkdir -p rootfs/var && mount -LVAR rootfs/var
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mkdir -p rootfs/usr && mount -LUSR rootfs/usr
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sleep 1
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rsync -a root_in_ram/home/ rootfs/home/
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rsync -a root_in_ram/var/ rootfs/var/
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rsync -a root_in_ram/usr/ rootfs/usr/
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rsync -a \
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--exclude="home/**" \
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--exclude="var/**" \
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--exclude="usr/**" \
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root_in_ram/ rootfs/
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sleep 1
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# Generate fstab.
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cat <<EOT > rootfs/etc/fstab
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LABEL=ROOTFS / ext4 errors=remount-ro 0 1
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LABEL=BOOT /boot ext4 defaults 0 2
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LABEL=EFI_SYSPART /boot/efi vfat defaults 0 2
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LABEL=HOME /home ext4 defaults 0 2
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LABEL=TMP /tmp ext4 defaults 0 2
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LABEL=USR /usr ext4 defaults 0 2
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LABEL=VAR /var ext4 defaults 0 2
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LABEL=SWAP1 none swap sw 0 2
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LABEL=SWAP2 none swap sw 0 2
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EOT
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# Chroot and install lvm2 + reconfigure grub-pc
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mount -t proc none /mnt/rootfs/proc
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mount -o bind /dev /mnt/rootfs/dev
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mount -o bind /dev/pts /mnt/rootfs/dev/pts
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mount -t sysfs sys /mnt/rootfs/sys
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mount --bind /run /mnt/rootfs/run
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rm -rf /mnt/rootfs/boot/*
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sleep 1
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chroot /mnt/rootfs/ bash
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sleep 1
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export LC_ALL=C
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mkdir -p /boot && mount /boot
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mkdir -p /boot/efi && mount /dev/nvme0n1p1 /boot/efi
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mount /tmp
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chmod 1777 /tmp
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sleep 1
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# purge des paquets de Grub et du noyau, pour réinitialiser complètement les config
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rm -rf /etc/default/grub.d
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apt purge -y os-prober grub-common grub-efi grub-efi-amd64 grub-efi-amd64-bin grub-pc grub2-common
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sleep 1
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# purge des kernels
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for kernel_pkg in $(dpkg -l | grep linux-image | awk '{ print $2 }'); do apt purge -y $kernel_pkg; done
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sleep 1
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# réinstallation des paquets
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apt install -y lvm2 grub-common grub-efi grub-efi-amd64 grub-efi-amd64-bin grub2-common linux-image-amd64
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sleep 1
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apt purge -y os-prober
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grub-install /dev/nvme0n1
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sleep 1
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apt purge -y os-prober
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# Questions "update-grub":
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# * Linux command line:
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# * Linux default command line: quiet
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# * Force extra installation to the EFI removable media path? Yes
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# * Update NVRAM variables to automatically boot into Debian? Yes
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update-grub
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# dpkg-reconfigure --frontend=noninteractive grub-efi-amd64
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dpkg-reconfigure grub-efi-amd64
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sleep 1
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# paquets utiles pour evolixisation par Ansible
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apt install -y sudo python python-apt
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sleep 1
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exit
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echo "Evolix partitioning done... You can now reboot!"
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