Requirements
HW: 2 nic device
OS: Ubuntu server 17.10
apt install bash debootstrap schroot syslinux nfs-kernel-server tftpd-hpa xorriso pigz zfsutils-linux
Optional config
apt install isc-dhcp-server
network config nano /etc/netplan/01-netcfg.yaml
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
version: 2
renderer: networkd
ethernets:
ens3:
dhcp4: no
addresses: [10.1.22.2/24]
gateway4: 192.168.122.1
nameservers:
addresses: [8.8.8.8,8.8.4.4]
ens4:
dhcp4: yes
netplan apply
Build livenet environment
Preparazione dell'ambiente zfs
zpool create livenet /dev/sdb
zfs create livenet/images
zfs create livenet/boot
Download package git clone https://github.com/scipioni/livenet-server.git edit /etc/default/livenet like this
# folder that contains livenet system
BASE=/livenet
IMAGES=${BASE}/images
BOOT=${BASE}/boot
Trivial FTP
edit /etc/default/tftp-hpa
TFTP_USERNAME="tftp"
TFTP_DIRECTORY="/zfsp_livenet/boot"
TFTP_ADDRESS="0.0.0.0:69"
TFTP_OPTIONS="--secure"
mkdir /livenet/boot/pxelinux.cfg cp -a /usr/lib/syslinux/* /livenet/boot cp /livenet/boot/modules/efi64/* /livenet/boot
edit /livenet/boot/pxelinux.cfg/default
default menu.c32 prompt 0 #timeout 100 menu title PXE Special Boot Menu MENU AUTOBOOT Starting Livenet in # seconds label bootlocal menu label ^Boot local disk menu default localboot 0 label nfs menu label Ubuntu 18.04 - diskless kernel /bionic/kernel append initrd=/bionic/initrd ro livenet_root=10.1.22.2:/zfsp_livenet/images/bionic livenet_profile=default label nfs menu label Ubuntu 14.04 - install kernel /trusty/kernel append initrd=/trusty/initrd ro livenet_root=10.0.254.240:/images/trusty livenet_profile=default livenet_action=install livenet_action_end=reboot
BUILD IMAGE CLIENT
zfs create livenet/images/bionic debootstrap –arch amd64 bionic /zfsp_livenet/images/bionic/ http://archive.ubuntu.com/ubuntu
cd /livenet/images run ….
R=bionic
cat > ${R}/etc/hosts <<QWK
127.0.0.1 localhost livenet-host
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
QWK
chroot ${R} lsb_release -c | awk '{print $2}' > ${R}/etc/debian_chroot
chroot bionic/
chroot ${R} apt-get -y -q install locales dialog
chroot ${R} locale-gen en_GB.UTF-8
chroot ${R} locale-gen it_IT.UTF-8
chroot ${R} update-locale LANG=it_IT.UTF-8 LANGUAGE=it:en_US:en
echo Europe/Rome > ${R}/etc/timezone
cp ${R}/usr/share/zoneinfo/Europe/Rome ${R}/etc/localtime
cat > ${R}/usr/sbin/policy-rc.d <<QWE
#!/bin/sh
# dpkg/apt not start any daemons when things are installed in the chroot
if [ ! "\\\`cat /etc/hostname\\\`" = "\\\`hostname\\\`" ]; then
exit 101
fi
QWE
chmod +x ${R}/usr/sbin/policy-rc.d
mount --bind /zfsp_livenet/images/bionic/boot/ /zfsp_livenet/boot/bionic
DISTR=bionic
cat > /etc/apt/sources.list <<QWE
#############################################################
################### OFFICIAL UBUNTU REPOS ###################
#############################################################
###### Ubuntu Main Repos
deb http://archive.ubuntu.com/ubuntu/ ${DISTR} main restricted universe multiverse
###### Ubuntu Update Repos
deb http://archive.ubuntu.com/ubuntu/ ${DISTR}-security main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ ${DISTR}-updates main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ ${DISTR}-proposed main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ ${DISTR}-backports main restricted universe multiverse
###### Ubuntu Partner Repo
deb http://archive.canonical.com/ubuntu ${DISTR} partner
QWE
apt update apt -y upgrade apt -y install initramfs-tools python-passlib pv screen byobu lsof pigz rsync nfs-common libpam-script xloadimage conntrack
install livenet client package
# copiare /home/scipio/.netrv e /home/scipio/.gitconfig in <chroot>/root/ cd /root git clone https://github.com/scipioni/livenet-client.git cd livenet-client git checkout bionic mv .git / git status find / -maxdepth 1 > .gitignore
inside git directory
rsync -avb etc/ /etc/ rsync -avb usr/ /usr/ rsync -avb debian / rsync -avb README.md / apt-get -y install linux-generic
etc/initramfs-tools/hooks/livenet
#!/bin/sh -e
# initramfs hook for livenet
#set -x
PREREQ=""
# Output pre-requisites
prereqs()
{
echo "$PREREQ"
}
case "$1" in
prereqs)
prereqs
exit 0
;;
esac
. /usr/share/initramfs-tools/hook-functions
rm ${DESTDIR}/bin/cpio # importante! altrimenti rimane un cpio troppo semplificato
copy_exec /bin/cpio /bin
mkdir -p ${DESTDIR}/conf
cp /etc/livenet/livenet.conf ${DESTDIR}/conf
[ -f /etc/livenet/livenet.conf.override ] && cp /etc/livenet/livenet.conf.override ${DESTDIR}/conf
cp /etc/initramfs-tools/scripts/functions-livenet ${DESTDIR}/conf
manual_add_modules aufs
manual_add_modules overlayfs
auto_add_modules net
auto_add_modules nfsv4
# pulizia di firmware non necessario e pesante
set +e
rm -f ${DESTDIR}/lib/firmware/* >/dev/null 2>&1
set -e
### qui sotto andrebbe commentato in produzione ###
# tastiera italiana in initram
# attivata da do_debug_shell (loadkeys /etc/boottime.kmap.gz)
#cp -au /etc/console-setup/cached.kmap.gz ${DESTDIR}/etc/boottime.kmap.gz
# nfs4
#copy_exec /usr/sbin/rpc.idmapd /bin
#copy_exec /sbin/mount.nfs /bin
#cp -au /etc/netconfig ${DESTDIR}/etc/netconfig
#cat > ${DESTDIR}/etc/passwd <<EOF
#nobody::65534:65534:nobody:/nonexistent:/bin/sh
#EOF
#cat > ${DESTDIR}/etc/group <<EOF
#nogroup:x:65534:
#EOF
# debug purpose ################
# ricordati di mettere FRAMEBUFFER=n in /etc/initramfs-tools/conf.d/splash
#copy_exec /sbin/ifconfig
#copy_exec /sbin/lsmod /bin
#copy_exec /usr/bin/lspci /bin
#################################
# wireless #####################
#copy_exec /sbin/iwconfig
#copy_exec /sbin/iwlist
#copy_exec /sbin/iwpriv
#copy_exec /sbin/iwevent
#copy_exec /sbin/iwgetid
#copy_exec /sbin/iwspy
#copy_exec /usr/sbin/rfkill
#cp -au /lib/firmware/iwl*-[13].ucode ${DESTDIR}/lib/firmware
#################################
Rebuild initramfs image
ln-mng –kernel
DHCP
Abilitare dhcpd su specifica scheda
Editare la riga in
/etc/default/isc-dhcp-server
INTERFACESv4="ens3"
Configurazione dhcpd
editare il file /etc/dhcp/dhcpd.conf al termine service isc-dhcp-service restart
ddns-update-style none;
authoritative;
option domain-name "livenet";
option domain-name-servers 8.8.8.8;
allow bootp;
allow booting;
option space PXE;
# Code 1: Multicast IP address of bootfile
option PXE.mtftp-ip code 1 = ip-address;
# Code 2: UDP port that client should monitor for MTFTP responses
option PXE.mtftp-cport code 2 = unsigned integer 16;
# Code 3: UDP port that MTFTP servers are using to listen for MTFTP requests
option PXE.mtftp-sport code 3 = unsigned integer 16;
# Code 4: Number of secondes a client must listen for activity before trying
# to start a new MTFTP transfer
option PXE.mtftp-tmout code 4 = unsigned integer 8;
option PXE.mtftp-delay code 5 = unsigned integer 8;
# Code 5: Number of secondes a client must listen before trying to restart
# a MTFTP transfer
option PXE.discovery-control code 6 = unsigned integer 8;
option PXE.discovery-mcast-addr code 7 = ip-address;
set vendor-string = option vendor-class-identifier;
class "PXE" {
match if substring(option vendor-class-identifier, 0, 9) = "PXEClient";
option vendor-class-identifier "PXEClient";
vendor-option-space PXE;
option PXE.mtftp-ip 0.0.0.0;
}
class "Etherboot" {
match if substring(option vendor-class-identifier, 0, 9) = "Etherboot";
option vendor-class-identifier "Etherboot";
vendor-option-space PXE;
option PXE.mtftp-ip 0.0.0.0;
}
class "LIVENET" {
match if (substring(option vendor-class-identifier,0,7) = "LIVENET") or (substring(option vendor-class-identifier,0,9) = "PXEClient") or (substring(option vendor-class-identifier,0,9) = "Etherboot");
log ( info, "Packet from PXE or LIVENET client");
}
shared-network "clients" {
subnet 10.1.22.0 netmask 255.255.255.0 {
option subnet-mask 255.255.255.0;
option routers 10.1.22.2;
#default-lease-time 28800;
#max-lease-time 86400;
pool {
# restringe il lease solo alla classe LIVENET
allow members of "LIVENET";
range 10.1.22.10 10.1.22.100;
filename "/pxelinux.0";
next-server 10.1.22.2;
}
}
}