1 == Setup a new kvm domain fast ==
3 Define a shell function
8 echo -n "New hostname: " &&
12 mirror=`cat /etc/apt/sources.list /etc/apt/sources.list.d/debian.list 2>/dev/null | awk '/^deb.*debian/ {print $2; exit}'` &&
13 vg=`vgdisplay -c | awk -F: '{print $1;exit}' | sed 's/ *//g'` &&
14 echo "Chosen vg is $vg" &&
15 echo "Chosen mirror is $mirror"
31 apt-get install debootstrap kpartx &&
32 lvcreate -L 128m -n "$host"-boot /dev/"$vg" &&
33 lvcreate -L 4g -n "$host"-root /dev/"$vg" &&
34 lvcreate -L 4g -n "$host"-swap /dev/"$vg" &&
36 ( echo ',,L,*' | sfdisk /dev/"$vg"/"$host"-boot ) &&
37 kpartx -v -a /dev/"$vg"/"$host"-boot &&
38 mkfs.ext3 /dev/mapper/"$vg"-"$host"--boot1 &&
39 mkfs.ext3 /dev/"$vg"/"$host"-root &&
40 mkswap /dev/"$vg"/"$host"-swap &&
43 mount /dev/"$vg"/"$host"-root "$target" &&
44 mkdir -p "$target/boot" &&
45 mount /dev/mapper/"$vg"-"$host"--boot1 "$target/boot" &&
48 debootstrap --variant=minbase lenny . "$mirror"
51 And finalize the setup:
56 echo "$host" > etc/hostname &&
57 cat > etc/hosts << EOF &&
60 # The following lines are desirable for IPv6 capable hosts
61 ::1 localhost ip6-localhost ip6-loopback
63 ff00::0 ip6-mcastprefix
65 ff02::2 ip6-allrouters
68 rm -fv etc/apt/sources.list &&
69 ( ! [ -e /etc/apt/sources.list ] || cp /etc/apt/sources.list etc/apt/sources.list)
70 (cp -v /etc/apt/sources.list.d/* etc/apt/sources.list.d/ || true ) &&
71 cp -v /etc/apt/preferences etc/apt/ &&
72 apt-key exportall | chroot . apt-key add - &&
73 chroot . apt-get update &&
74 echo "Apt::Install-Recommends 0;" > etc/apt/apt.conf.d/local-recommends &&
75 chroot . apt-get install net-tools iproute ifupdown dialog vim netbase &&
76 #chroot . apt-get remove --purge cpp dpkg-dev g++ gcc gcc-4.2-base libatm1 libdevmapper1.02.1 libgpm2 libc6-dev linux-libc-dev libstdc++6-4.3-dev binutils cpp-4.3 gcc-4.3 gettext-base libgmp3c2 libgomp1 libmpfr1ldbl libtimedate-perl
77 # don't - it may start daemons
78 #chroot . apt-get dist-upgrade
79 chroot . apt-get install grub &&
80 cp -av usr/lib/grub/x86_64-pc boot/grub &&
82 device (hd0) /dev/mapper/$vg-$host--boot
87 # install a kernel image
88 echo -e "do_symlinks = yes\nlink_in_boot = yes\ndo_initrd = yes" > etc/kernel-img.conf &&
89 chroot . apt-get install linux-image-2.6-amd64
93 And a fstab and a boot loader config
96 # doesn't work: chroot . update-grub
97 rootuuid=`vol_id /dev/"$vg"/"$host"-root "$target" | awk -F= '$1=="ID_FS_UUID" {print $2}'` &&
98 swapuuid=`vol_id /dev/"$vg"/"$host"-swap "$target" | awk -F= '$1=="ID_FS_UUID" {print $2}'` &&
99 bootuuid=`vol_id /dev/mapper/"$vg"-"$host"--boot1 | awk -F= '$1=="ID_FS_UUID" {print $2}'` &&
100 cat > boot/grub/menu.lst << EOF &&
103 color cyan/blue white/blue
105 ### BEGIN AUTOMAGIC KERNELS LIST
106 # kopt=root=UUID=$rootuuid ro
108 ## ## End Default Options ##
111 kernel /vmlinuz root=UUID=$rootuuid ro
114 ### END DEBIAN AUTOMAGIC KERNELS LIST
116 cat > etc/fstab << EOF &&
117 UUID=$rootuuid / ext3 errors=remount-ro 0 1
118 UUID=$bootuuid /boot ext3 defaults 0 2
119 UUID=$swapuuid none swap sw 0 0
121 cat > etc/network/interfaces << EOF
123 iface lo inet loopback
126 iface eth0 inet manual
127 pre-up ip link set up dev \$IFACE
128 post-down ip link set down dev \$IFACE
132 Maybe fix/setup networking properly:
135 vi etc/network/interfaces
142 umount "$target"/boot &&
144 kpartx -v -d /dev/"$vg"/"$host"-boot &&
148 Setup a new kvm domain by creating a new file in /etc/dm-virt/`hostname/$host.xml.
150 * Properly configure hostname
151 * Pick a new uuid ({{{uuidgen}}})
152 * Setup block devices properly
153 * pick a new and unique mac address (on d.o every kvm host has their own mac address space and the last block is changed for the guests, as in {{{..:..:..:..:<host byte>:<guest byte>}}}. )
155 ** {{{virsh define foo.xml}}}
156 ** {{{virsh start foo}}}
157 ** {{{virsh destroy foo}}}
158 ** {{{virsh vncdisplay foo}}} (and ssh -L 5900:localhost:<5900+x> $host and vnc localhost)