scripts to build a ubuntu qcow2 root image for kvm
This commit is contained in:
Jeffrey Paul
parent
937ac1d09f
commit
3c9e5fe87c
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default: gen
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gen:
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vagrant destroy -f
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vagrant up
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sync:
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rsync -avP ./make.sh root@nue1d0.datavibe.net:/storage/buildimage/make.sh
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# -*- mode: ruby -*-
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# vi: set ft=ruby :
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# Vagrantfile API/syntax version. Don't touch unless you know what you're doing!
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VAGRANTFILE_API_VERSION = "2"
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SETUP_BASE = <<-EOF
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echo "UseDNS no" >> /etc/ssh/sshd_config
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service ssh restart
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function detect_local_mirror () {
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AL="$(avahi-browse -p -t -r _ubuntumirror._tcp | grep '^=' | head -1)"
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if [ -n "$AL" ]; then
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NAME="$(echo \"$AL\" | cut -d';' -f 8)"
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PORT="$(echo \"$AL\" | cut -d';' -f 9)"
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UM="http://${NAME}:${PORT}/ubuntu/"
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MOK="$(curl --head \"${UM}ls-lR.gz\" 2>&1 | grep '200 OK' | wc -l)"
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if [ $MOK -gt 0 ]; then
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echo "$UM"
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fi
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fi
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}
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function set_apt_mirror () {
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CN="$(lsb_release -c -s)"
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RPS="main restricted multiverse universe"
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echo "deb $1 $CN $RPS" > /etc/apt/sources.list.new
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for P in updates backports security ; do
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echo "deb $1 $CN-$P $RPS" >> /etc/apt/sources.list.new
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done
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mv /etc/apt/sources.list.new /etc/apt/sources.list
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}
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set_apt_mirror "mirror://mirrors.ubuntu.com/mirrors.txt"
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apt-get update
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apt-get -y install avahi-utils jq curl
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UM="$(detect_local_mirror)"
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if [ -n "$UM" ]; then
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echo "Detected LAN ubuntu mirror at $UM - configuring!"
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set_apt_mirror "$UM"
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fi
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echo "**********************************************************"
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echo "**********************************************************"
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cat /etc/apt/sources.list
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echo "**********************************************************"
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echo "**********************************************************"
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apt-get update
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apt-get -y install kpartx debootstrap lvm2 qemu-utils
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EOF
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Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
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config.vm.box = "ubuntu-12.04"
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config.vm.box_url = "http://cloud-images.ubuntu.com/vagrant/precise/" + \
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"current/precise-server-cloudimg-amd64-vagrant-disk1.box"
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config.vm.network "public_network", :bridge => "en4: Display Ethernet"
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config.vm.provision "shell", inline: SETUP_BASE
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config.vm.provision "shell", path: "buildimage.sh"
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config.vm.provider :virtualbox do |vb|
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vb.customize ["modifyvm", :id, "--memory", "2048"]
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end
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end
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#!/bin/bash
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R="saucy" # release
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MR="./roottemp" # mounted root
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RI="./raw.img" # raw image
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VGN="vmvg0" # volume group name
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DSIZE="8G" # disk size
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DATE="$(date +%Y%m%d)"
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LOOPDEV="/dev/loop5"
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LDBASE="$(basename $LOOPDEV)"
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ROOTPW="7c493cc530734f4c11e00bcecadb7b73"
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function detect_local_mirror () {
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AL="$(avahi-browse -p -t -r _ubuntumirror._tcp | grep '^=' | head -1)"
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UM=""
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if [ -n "$AL" ]; then
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NAME="$(echo \"$AL\" | cut -d\; -f 8)"
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PORT="$(echo \"$AL\" | cut -d\; -f 9)"
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UM="http://${NAME}:${PORT}/ubuntu/"
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fi
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if [ -z "$UM" ]; then
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echo "http://archive.ubuntu.com/ubuntu/"
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else
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echo "$UM"
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fi
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}
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UM="$(detect_local_mirror)"
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set -e
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dd if=/dev/zero of=$RI bs=1 count=0 seek=$DSIZE
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parted -s $RI mklabel msdos
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parted -a optimal $RI mkpart primary 0% 200MiB
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parted -a optimal $RI mkpart primary 200MiB 100%
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parted $RI set 1 boot on
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losetup $LOOPDEV $RI
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kpartx -av $LOOPDEV
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mkfs.ext4 -L BOOT /dev/mapper/${LDBASE}p1
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tune2fs -c -1 /dev/mapper/${LDBASE}p1
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pvcreate /dev/mapper/${LDBASE}p2
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vgcreate $VGN /dev/mapper/${LDBASE}p2
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lvcreate -l 100%FREE -n root $VGN
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mkfs.ext4 -L ROOT /dev/$VGN/root
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mkdir -p $MR
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mount /dev/$VGN/root $MR
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mkdir $MR/boot
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mount /dev/mapper/${LDBASE}p1 $MR/boot
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# install base:
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debootstrap --arch amd64 $R $MR $UM
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# temporary config for install:
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RPS="main restricted multiverse universe"
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echo "deb $UM $R $RPS" > $MR/etc/apt/sources.list
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for P in updates backports security ; do
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echo "deb $UM $R-$P $RPS" >> $MR/etc/apt/sources.list
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done
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cp /etc/resolv.conf $MR/etc/resolv.conf
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cat > $MR/etc/environment <<EOF
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PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
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LANGUAGE="en_US:en"
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LANG="en_US.UTF-8"
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ROOT_IMAGE_BUILD_DATE="$DATE"
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EOF
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chroot $MR locale-gen en_US.UTF-8
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chroot $MR dpkg-reconfigure locales
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echo 'cd /dev && MAKEDEV generic 2>/dev/null' | chroot $MR
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BUUID="$(blkid -s UUID -o value /dev/mapper/${LDBASE}p1)"
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RUUID="$(blkid -s UUID -o value /dev/${VGN}/root)"
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# this has to come before packages:
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cat > $MR/etc/fstab <<EOF
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proc /proc proc defaults 0 0
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/dev/mapper/$VGN-root / ext4 noatime,errors=remount-ro 0 1
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UUID=$BUUID /boot ext4 noatime 0 2
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EOF
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cat > $MR/etc/network/interfaces <<EOF
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auto lo
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iface lo inet loopback
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auto eth0
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iface eth0 inet dhcp
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EOF
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HOSTNAME="${R}64-$DATE"
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echo "$HOSTNAME" > $MR/etc/hostname
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cat > $MR/etc/hosts <<EOF
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127.0.0.1 localhost
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127.0.1.1 $HOSTNAME
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::1 localhost ip6-localhost ip6-loopback
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fe00::0 ip6-localnet
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ff00::0 ip6-mcastprefix
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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ff02::3 ip6-allhosts
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EOF
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#### install and update packages
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mount --bind /proc $MR/proc
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mount --bind /dev $MR/dev
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mount --bind /sys $MR/sys
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chroot $MR <<EOF
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export DEBIAN_FRONTEND=noninteractive
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export RUNLEVEL=1 apt-get -y update
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PACKAGES="
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linux-image-server
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lvm2
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acpid
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avahi-utils
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"
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apt-get -y install \$PACKAGES
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EOF
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echo "GRUB_CMDLINE_LINUX_DEFAULT=\"text serial=tty0 console=ttyS0\"" \
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>> $MR/etc/default/grub
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echo "GRUB_SERIAL_COMMAND=\"serial --unit=0 --speed=9600 --stop=1\"" \
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>> $MR/etc/default/grub
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echo "GRUB_TERMINAL=\"serial\"" >> $MR/etc/default/grub
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echo "GRUB_GFXPAYLOAD=\"text\"" >> $MR/etc/default/grub
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chroot $MR /bin/bash -c "echo \"root:$ROOTPW\" | chpasswd"
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chroot $MR update-grub 2> /dev/null
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chroot $MR grub-mkconfig -o /boot/grub/grub.cfg 2> /dev/null
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cat > $MR/boot/grub/device.map <<EOF
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(hd0) ${LOOPDEV}
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EOF
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chroot $MR grub-install ${LOOPDEV} 2> /dev/null
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# get rid of device.map after grub is installed...
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rm $MR/boot/grub/device.map
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chroot $MR update-initramfs -d -k all
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# for some stupid reason, -k all doesn't work after removing:
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KERN="$(cd $MR/boot && ls vmlinuz*)"
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VER="${KERN#vmlinuz-}"
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chroot $MR update-initramfs -c -k $VER
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cat > $MR/etc/init/ttyS0.conf <<EOF
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# ttyS0 - getty
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# run a getty on the serial console
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start on stopped rc or RUNLEVEL=[12345]
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stop on runlevel [!12345]
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respawn
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exec /sbin/getty -L 115200 ttyS0 vt102
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EOF
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# update all packages on the system
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chroot $MR /bin/bash -c \
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"DEBIAN_FRONTEND=noninteractive RUNLEVEL=1 apt-get -y upgrade"
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#####################################################
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### Local Modifications
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#####################################################
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# install ssh key
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mkdir -p $MR/root/.ssh
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cp /root/.ssh/authorized_keys $MR/root/.ssh/
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# clean apt cache
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rm $MR/var/cache/apt/archives/*.deb
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# set dist apt source:
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RPS="main restricted multiverse universe"
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MURL="mirror://mirrors.ubuntu.com/mirrors.txt"
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echo "deb $MURL $R $RPS" > $MR/etc/apt/sources.list
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for P in updates backports security ; do
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echo "deb $MURL $R-$P $RPS" >> $MR/etc/apt/sources.list
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done
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# clear issue
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echo "clear > /etc/issue" | chroot $MR
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# run firstboot on boot if exists
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echo "if test -x /firstboot.sh ; then /firstboot.sh ; fi" \
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>> $MR/etc/rc.local
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# write firstboot file
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cat > $MR/firstboot.sh <<EOF
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#!/bin/bash
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apt-get update
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apt-get -y install openssh-server
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rm /firstboot.sh
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EOF
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chmod +x $MR/firstboot.sh
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#####################################################
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### Clean Up and Write Image
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#####################################################
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echo "******************************************************"
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echo "*** Almost done. Cleaning up..."
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echo "******************************************************"
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set +e
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while grep roottemp /proc/mounts ; do
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for MP in $(cat /proc/mounts | grep roottemp | awk '{print $2}') ; do
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umount -l $MP
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done
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sleep 1
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done
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set -e
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rmdir $MR
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vgchange -a n $VGN
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kpartx -dv $LOOPDEV
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losetup -d $LOOPDEV
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qemu-img convert -f raw -O qcow2 $RI ${R}64.qcow2 && rm $RI
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sync
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echo "******************************************************"
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echo "*** Image generation completed successfully."
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echo "*** output: ${R}64.qcow2"
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echo "******************************************************"
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#!/bin/bash
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MR="./mr"
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L="/dev/loop5"
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losetup -d /dev/loop6
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umount $MR/sys
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umount $MR/proc
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umount $MR/dev
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umount $MR/boot
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umount $MR
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vgchange -a n vmvg0
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kpartx -dv $L
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losetup -d $L
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rm -rf mr raw.img
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