OSインストーラーの自作方法

1. LINE DEVELOPER MEETUP #45 IN KYOTO2018-09-27 TOMOHIRO KIMURA @ LINE CORPORATION OS

2. • Tomohiro Kimura • LINE • IT Service Center – System dept – System Engineering Team • Engineer • LINE • • OS

3. Agenda • LINE OS • pxeboot • • OS

4. LINE OS

5. • LINE 90% • • ( ) • VM / Container • • LINE OS

6. Hypervisor / VM / Container OS OS

7. OS LINE OS old new RAID OS pxeboot webui DHCP, TFTP Installer kickstart pkg yum tar other config Profile & Debuggable • RAID • Kickstart yum pkg •

8. LINE OS Frontend (WebUI,API,DB) Backend (dhcp,tftp,pxe,os image) http pxeboot • Fronend • Hostname,macaddr,ipaddr,RAID ,OS • Backend: dhcp,tftp • pxeboot • • RAID • Partition, FileSystem • OS Image http • • reboot

9. PXEBOOT

10. dhcpd.conf PXEBOOT dhcpd.conf host host01 { hardware ethernet 64:5e:be:ab:cd:ef; # host01 Macaddr fixed-address 192.168.123.11; # host01 IPaddr option host-name ”host01"; next-server 192.168.123.10; # tftp IPaddr filename "pxelinux.0”; }

11. pxelinux.cfg PXEBOOT pxelinux.cfg/c0a87b08 DEFAULT menu.c32 PROMPT 0 TIMEOUT 50 MENU TITLE Support PXE LABEL Installer (ttyS0,115200n8) MENU LABEL Installer CentOS 6.9 x86_64 (ttyS0,115200n8) kernel boot/centos/6/vmlinuz append initrd=boot/centos/6/initrd.img root= rw console=tty1 console=ttyS0,115200n8 • c0a87b08 192.168.123.11 hex • join('', map {sprintf "¥U%02x", $_} split(/¥./, $ip)); • vmlinuz Distribution Kernel • initrd.img initram image • root= rootfs kernel panic

12. • pxelinux.cfg linux kernel initrd.img tftp • Kernel • Initrd.img • Kernel /sbin/init # see linux/init/main.c • sysvinit upstart /sbin/init • systemd /lib/systemd/systemd • /sbin/init • bash python perl init #!/bin/bash reboot

13. • Daemon systemd systemd • Systemd /sbin/init systemd service • sysvinit /etc/rc.*/ systemd

14. • initramfs nfs rootfs / • initramfs • Storage Network kernel module • ( busybox) • /etc (udev, passwd ) • initramfs • • daemon • /sbin/init initramfs

15. • pure initramfs • initramfs (gz cpio) • /sbin/init • • • initramfs initramfs

16. INITRAMFS # dracut –c dracut.conf initrd_base.img 2.6.32 # zcat initrd_base.img | cpio –i -c $ cat dracut.conf dracutmodules+="base dash network kernel-modules terminfo nfs udev- rules” add_drivers+="hpsa e1000 igb megaraid_sas"

17. INITRAMFS # yum -y --installroot=`pwd` install `cat install_rpm_list` # rm –rf `cat neet_not_list` • rpm initramfs • busybox • dracut.conf • man

18. INITRAMFS # find . -print0 | cpio --null -ov --format=newc | gzip -9 > ../initrd.img

19. • /dev • kernel module • • • daemon • pkg • LINE pkg /SBIN/INIT

20. RAID RAID # MegaCli64 CfgLdDel -LALL -a0 -NoLog; MegaCli64 -AdpSetProp -EnableJBOD -0 -a0 # MegaCli64 -CfgLdAdd -r0[32:0] CachedBadBBU -a0 -NoLog

21. Partition # dd if=/dev/zero of=/dev/sda bs=65536 count=1 # /usr/sbin/sgdisk -Z /dev/sda # parted -s /dev/sda mklabel gpt # parted -s /dev/sda unit B mkpart primary ext3 1048576 1074790400 # parted -s /dev/sda set 1 boot on # parted -s /dev/sda unit B mkpart primary linux-swap 1074790912 3222274560 # parted -s /dev/sda unit B mkpart primary xfs 3222275072 100% Number Start End Size File system Name Flags 17.4kB 1049kB 1031kB Free Space 1 1049kB 1075MB 1074MB primary boot 2 1075MB 3222MB 2147MB linux-swap(v1) primary 3 3222MB 479GB 476GB xfs primary

22. filesystem # mkfs.xfs -b size=1024 -f /dev/sda3 # mount -t xfs /dev/sda3 /mnt/ # mkfs.ext3 -F /dev/sda1 # tune2fs -O +dir_index /dev/sda1 # mount -t ext3 /dev/sda1 /mnt/boot # mkswap -f -c /dev/sda2 # mount -o bind /dev /mnt/dev # mount -t proc none /mnt/proc # mount -o bind /sys /mnt/sys

23. OS # wget -q -O - http://192.168.123.10/images/centos_6.9_x86_64.tgz | tar -- numeric-owner -xzf - -C /mnt # chroot /mnt /sbin/grub-install /dev/sda # /mnt Network # /mnt hostname # (chef ansible )

24. reboot # reboot -f

25. OS

26. OS # mkdir -p ${BUILDROOT} # yum -y --installroot=${BUILDROOT} install `cat packages/10_base.list` # tar cvzf artifact/centos_6.9.tgz -C ${BUILDROOT} . Packer

27. • Webui,api • pxeboot pxeboot • initramfs • raid • os yum • os • Distribution

28. Anaconda

29. THANK YOU

OSインストーラーの自作方法

LINE Corporation

OSインストーラーの自作方法