about 7 years ago

Archlinux Installation with Raid

I will show Archlinux installation with the following environment.

  • GPT is a standard for the layout of the partition table on a physical hard disk. And you can find the introduction in wiki
    CPU: 2
    RAM: 2G
    Harddisk: 20G*2
    GPT
    /boot - 128M, ext2
    swap - 1G
    /root - rest, ext4
    
  1. The first, you must download the live CD, and you can find it in official website. I choose nctu mirror in Taiwan. [download link 2014.08.01] And then let computer or VM select CD as its first boot-device.
  2. Set up the sshd to make it easy to install
    Network setup

    • Here, I use static and private IP.
    • If there is not static IP, you just use DHCP, and need to get its IP for ssh.
    • Or, you can go next step, and type command line in front of PC(VM).
      # dhcpcd -k                                        //stop the DHCP
      # ip link                                          //find network interface(NI) name
      # ip link set ens32 up                             //en32 is NI's name
      # ip addr add 192.168.10.50/24 dev ens32
      # ip route add default via 192.168.10.1
      # echo "nameserver 8.8.8.8" >> /etc/resolv.conf
      # passwd                                           //set up temporary password
      # systemctl start sshd
      # ping www.google.com                              //testing network
      
    • Then, you can use shell on linux workstation or use putty on windows to remotely login PC.
  3. Hard disk partition

    • You can use 'cgdisk' to create GPT partitions with description.
    • But I use 'gdisk' here
      # gdisk /dev/sda
      //Type '?', if you need to help. 
      // 'n' can add a new partition.
      // 'w' write table to disk and exit.
      // 'p' see your partition table.
      //And then, you need to partition it to like to below.
      Number  Start (sector)    End (sector)  Size       Code  Name
      1            6144          210943   100.0 MiB   FD00  Linux RAID
      2          210944         2308095   1024.0 MiB  8200  Linux swap
      3         2308096        41943006   18.9 GiB    FD00  Linux RAID
      128            2048            6143   2.0 MiB     EF02  BIOS boot partition
      
    • Then,copy partition table to /dev/sdb
      # sgdisk /dev/sda  -R=/dev/sdb
      # sgdisk -G /dev/sdb
      
  4. Raid

    • refer Archlinux wiki Raid page.
    • use mdadm to do software RAID. And I will make / and /boot do RAID1(mirror) in order to backup data.
      # mdadm --create --verbose /dev/md1 --level=mirror --raid-devices=2 /dev/sd{a,b}1
      # mdadm --create --verbose /dev/md3 --level=mirror --raid-devices=2 /dev/sd{a,b}3
      # mdadm --detail --scan | tee -a /etc/mdadm.conf  //save the profile
      
    • use 'cat /proc/mdstat' to check out progress of mdadm.
  5. Create filesystems and install base system

    • You can add mirror location or change the order in '/etc/pacman.d/mirrorlist', if you need.
    • Here, I set 'Server = http://linux.cs.nctu.edu.tw/archlinux/$repo/os/$arch' (NCTU mirror) to first.
      # mkswap /dev/sda2
      # mkswap /dev/sdb2
      # swapon /dev/sd{a,b}2
      # mkfs.ext2 /dev/md1
      # mkfs.ext4 /dev/md3
      # mount /dev/md3 /mnt && mkdir /mnt/boot && mount /dev/md1 /mnt/boot
      # pacstrap /mnt base base-devel  // install base and base-devel on /mnt
      
  6. Initially set system profile

    • you can refer to Fstab, Locale, Console font and keymap,and Time zone.
      # genfstab -p /mnt | tee /mnt/etc/fstab
      following table is my finally fstab,and you can modify it in /mnt/etc/fstab.
      /dev/md3                /               ext4            defaults,relatime       0 1
      /dev/md1                /boot           ext2            rw,relatime     0 2
      /dev/sda2               none            swap            defaults        0 0
      /dev/sdb2               none            swap            defaults,pri=-2 0 0
      # cp /etc/mdadm.conf /mnt/etc/ # arch-chroot /mnt # hostnamectl set-hostname [your hostname] # echo "KEYMAP=us" > /etc/vconsole.conf # ln -s /usr/share/zoneinfo/Asia/Taipei /etc/localtime # hwclock --systohc --utc --adjfile /etc/adjtime # vi /etc/locale.gen //To uncomment a line remove the '#' in the front, if your system needs it to support the locale(language). Following options are selected for my system.
      en_US.UTF-8 UTF-8 en_US ISO-8859-1 zh_TW.UTF-8 UTF-8 zh_TW BIG5
      # locale-gen # echo "LANG=en_US.UTF-8" > /etc/locale.conf
    • set up network
      # systemctl disable network
      # cd /etc/netctl
      # cp examples/ethernet-static ethernet
      # vi ethernet
      //Like to below. Here, using static IP to set my profile, if you use DHCP, you can refer to Network.
      Interface=ens32 Connection=ethernet IP=static Address=('192.168.10.51/24') Gateway='192.168.10.1' DNS=('140.113.235.1') IP6=stateless
      # netctl enable ethernet
    • Install ssh and create an initial ramdisk environment
      # pacman -S openssh
      # systemctl enable sshd.service
      # vi /etc/mkinitcpio.conf
      //add 'mdadm_udev' option to HOOKS. Look like to HOOKS="base udev autodetect modconf block filesystems keyboard fsck mdadm_udev"
      # mkinitcpio -p linux
      
  7. Install and configure a bootloader

    • Install 'Grub' to system, and seting boot option.
      # pacman -S grub
      # grub-install --target=i386-pc --recheck /dev/sda
      # grub-install --target=i386-pc --recheck /dev/sdb
      # cp /usr/share/locale/en\@quot/LC_MESSAGES/grub.mo /boot/grub/locale/en.mo
      # vi /etc/default/grub
      //add 'nomodeset' option to GRUB_CMDLINE_LINUX_DEFAULT. Look like to GRUB_CMDLINE_LINUX_DEFAULT="quiet nomodeset".
      # grub-mkconfig -o /boot/grub/grub.cfg
      # passwd                     // Setting root's password.
      # exit
      # reboot
      
  8. Success and reboot system

    • You can 'ssh' immediate, if no any problem.
    • May be, you need to delete 'know_hosts' in your ssh profile, if you install with 'ssh'.
    • May be, your system have some problem such as network profile wrong, sshd not running, or /etc/fstab not correct, etc.
  9. My common pogram list
    -Just, for reference.

    pacman -Sy sudo vim screen bash-completion dnsutils net-tools git mercurial wget zip unzip zsh
    pacman -Sy vim
    pacman -Sy screen
    pacman -Sy bash-completion
    pacman -Sy dnsutils
    pacman -Sy net-tools
    pacman -Sy git
    pacman -Sy mercurial
    pacman -Sy wget
    pacman -Sy zip
    pacman -Sy unzip
    
  10. Notice: need to set up NTP

    # pacman -Sy ntp
    # vim /etc/ntp.conf
    # systemctl enable ntpd
    # systemctl start ntpd
    //Testing
    # date
    ==>Sun Apr 17 11:18:31 CST 2016
    

    Example ntp.conf

    server tock.stdtime.gov.tw prefer¬                                                  
    server tick.stdtime.gov.tw¬                                                         
    server time.stdtime.gov.tw
    restrict default kod limited nomodify nopeer noquery notrap¬                        
    restrict 127.0.0.1¬                                                                 
    restrict ::1
    driftfile /var/lib/ntp/ntp.drift
    
  11. Reference

  12. Article update information

    • 2014/8/21 finish process of installation
    • 2014/8/15 update
    • 2014/8/15 Begin writing this Article.
    • 2016/4/17 Add ntp set up
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