Arch linux setup for Qemu/kvm instalation

arch-linux-qemu-kvm-install.md

Arch Linux Qemu/KVM installation guide

1) Partitioning

a) create partitions using a tool like gdisk, cfdisk .... (more about partitioning )

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       create a partition 1M code ef02 (BIOS Boot Partition) 
       create a partition for luks 8e00 (LVM partition)
   

b) after partifioning we must build the filesystems on the devices (format partitions) using mkfs

   
       mkfs.ext2 /dev/sdX1  // format bios-boot partition as ext2  
       mkfs.ext4 /dev/sdX2  
       mkfs.ext4 /dev/sdX3
       mkswap /dev/sdX4
   

b.1) format encrypted partition

   
       cryptsetup luksFormat -v -s 512 -sha512 /dev/sdX2
       cryptsetup luksOpen /dev/sdX2 luks // luks is the device name
       
       /** sudo dmsetup remove /dev/mapper/disk */
   

b.2) create logical volumes

   
       pvcreate /dev/mapper/luks
       vgcreate rootvg /dev/mapper/luks  // rootvg is the volume name 
       
       lvcreate -n swap -L 5G -C y rootvg
       lvcreate -n root -L 20G rootvg
       lvcreate -n home -l 100%FREE rootvg
       
   

b.3) format the logical volumes

   
       mkfs.ext4 /dev/mapper/rootvg-root 
       mkfs.ext4 /dev/mapper/rootvg-home
       mkswap /dev/mapper/rootvg-swap
   

gdisk /dev/sdx

1M at the start of partition table

1M bios boot partition

1M at the end of partition table

don't mount boot partition

cryptsetup luksOpen /dev/sdxY luksdisk

   
       vi /etc/mkinitcpio.conf 
   
   
    
       MODULES="virtio virtio_blk virtio_pci virtio_net"
       HOOKS="... block encrypt lvm2 filesystem ..."  // encrypt lvm2
   
   
   rebuild the linux-img
    
       mkinitcpio -p linux
   
   

configure Grub

   
       pacman -S grub
       vi /etc/default/grub
   
   
        
      GRUB_CMDLINE_LINUX_DEFAULT="crtyptdevice=/dev/sda2:mainvg root=/dev/mapper/mainvg-root quiet"
      GRUB_ENABLE_CRYPTODISK="y"
   
   
   install grub 
   
      grub-install --target=i386-pc --recheck /dev/sda
      grub-mkconfig -o /boot/grub/grub.cfg
   

    exit 
    umount -R /mnt 
    shutdown now