initial commit

README

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+4.1. a) and 4.2 a)
+
+In this setup we will create four virtual machines. Two servers for redundant
+data storage and two clients, each running a dom0.
+
+Network configuration is done using static IPs:
+
+	server1:   10.0.2.172
+	server2:   10.0.2.173
+	virt_serv: 10.0.2.174
+	client1:   10.0.2.83
+	client2:   10.0.2.84
+
+All of the following is executed by several factors faster after installation
+of kvm for qemu:
+
+	apt-get install qemu-kvm
+
+The tutorial assumes a 64 bit host. For a 32 bit host, change
+qemu-system-x86_64 to qemu-system-i386 and change amd64 in the installer url to
+i386.
+
+The tutorial also assumes a Debian host (any release of lenny or newer should
+work) and a working apt-cacher setup. To setup apt-cacher, do:
+
+	apt-get install apt-cacher
+
+If you dont want to use apt-cacher, you have to adapt the package sources in
+the scripts.
+
+Get the debian wheezy installer:
+
+wget http://cdimage.debian.org/cdimage/daily-builds/daily/arch-latest/kfreebsd-amd64/iso-cd/debian-testing-kfreebsd-amd64-businesscard.iso
+
+Install vde for a userspace switched network between all connected qemu
+instances:
+
+	apt-get install vde2
+
+And start it (sending it to the background) together with slirp which provides
+connection to the outside using slirp networking (just as qemu user mode
+networking):
+
+	vde_switch -daemon
+	slirpvde -dhcp -daemon
+
+Starting slirp with dhcp enabled is necessary for the debian-installer to
+acquire an initial IP (giving all settings as isolinux arguments is tedious and
+errorprone) and for the domus to get an IP.
+
+Create two disk images for the two server machines and two for the client
+machines:
+
+	dd if=/dev/zero of=server1.img bs=1 count=1 seek=3000MiB
+	dd if=/dev/zero of=server2.img bs=1 count=1 seek=3000MiB
+	dd if=/dev/zero of=client1.img bs=1 count=1 seek=3000MiB
+	dd if=/dev/zero of=client2.img bs=1 count=1 seek=3000MiB
+
+Start the machines with these images, giving them all the debian installer
+cdrom and connecting them to the vde network.
+
+	qemu-system-x86_64 -m 256 -hda server1.img -net nic,macaddr=DE:AD:BE:EF:BE:9D -net vde,sock=/tmp/vde.ctl -cdrom debian-testing-amd64-businesscard.iso
+	qemu-system-x86_64 -m 256 -hda server2.img -net nic,macaddr=DE:AD:BE:EF:74:E9 -net vde,sock=/tmp/vde.ctl -cdrom debian-testing-amd64-businesscard.iso
+	qemu-system-x86_64 -m 256 -hda client1.img -net nic,macaddr=DE:AD:BE:EF:D4:4A -net vde,sock=/tmp/vde.ctl -cdrom debian-testing-amd64-businesscard.iso
+	qemu-system-x86_64 -m 256 -hda client2.img -net nic,macaddr=DE:AD:BE:EF:78:01 -net vde,sock=/tmp/vde.ctl -cdrom debian-testing-amd64-businesscard.iso
+
+The isolinux boot menu will pop up. Choose "Advanced options" and then select
+"Automated install" and press [TAB] to edit the boot commandline. Append the
+preseed url for debconf like this to the end of each of the installers
+respectively:
+
+	preseed/url=http://mister-muffin.de/debian/server1.txt
+	preseed/url=http://mister-muffin.de/debian/server2.txt
+	preseed/url=http://mister-muffin.de/debian/client1.txt
+	preseed/url=http://mister-muffin.de/debian/client2.txt
+
+Press enter and get yourself a coffee. After everything is finished the
+machines will automatically shut down.
+
+Now start all machines by using:
+
+	qemu-system-x86_64 -m 256 -hda server1.img -net nic,macaddr=DE:AD:BE:EF:BE:9D -net vde,sock=/tmp/vde.ctl -nographic
+	qemu-system-x86_64 -m 256 -hda server2.img -net nic,macaddr=DE:AD:BE:EF:74:E9 -net vde,sock=/tmp/vde.ctl -nographic
+	qemu-system-x86_64 -m 1000 -hda client1.img -net nic,macaddr=DE:AD:BE:EF:D4:4A -net vde,sock=/tmp/vde.ctl -nographic
+	qemu-system-x86_64 -m 1000 -hda client2.img -net nic,macaddr=DE:AD:BE:EF:78:01 -net vde,sock=/tmp/vde.ctl -nographic
+
+The two clients get more ram now because they have to host domus.
+
+A firstboot sysv-init script will initialize drbd on the meta partition for
+both servers and start the synchronization by setting server1 as the primary
+host.
+
+When this is done, extract a root filesystem of your choice into
+/data/export/vm01 on server1.
+
+Creating a root filesystem to share via nfs can be done by using debootstrap
+and then manually configuring it [1] or by running xen-create-image, then
+editing /etc/fstab and then putting the result on server1.
+
+xen-create-image --hostname=vm01 --dir=/root --dhcp --noswap --size=400Mb
+
+For convenience I did the above and put a tarball with debian wheezy online. On
+server1, do:
+
+	mkdir /data/export/vm01
+	wget -O - http://mister-muffin.de/debian/nfs-root-wheezy-amd64.tar | tar -x -C /data/export/vm01
+
+	Username: root
+	Password: root
+
+After the rootfilesystem is in place you can start the domu on client1:
+
+	xm create /etc/xen/vm01.cfg
+
+And migrate it to client2:
+
+	xm migrate --live vm01 client2
+
+tadaa! :)
+
+1/2:
+
+drbdadm create-md res
+#drbdadm up all
+
+1:
+#drbdadm -- --do-what-I-say primary all
+drbdadm -- --overwrite-data-of-peer primary all
+#drbdadm -- connect all
+#drbdadm primary
+
+
+
+[1] http://blog.mister-muffin.de/2011/11/21/xen-hypervisor-on-qemu-kvm-and-domu-nfs-boot-with-vde/

client1.txt

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+# preseed options use dhcp for installation
+# temporary hostname during installation will be "install"
+
+d-i debian-installer/locale string en_US
+d-i console-keymaps-at/keymap select us
+d-i keyboard-configuration/xkb-keymap select us
+d-i netcfg/choose_interface select auto
+d-i netcfg/get_hostname string install
+d-i netcfg/get_domain string foobar.org
+d-i mirror/country string manual
+d-i mirror/http/hostname string 10.0.2.2:3142
+d-i mirror/http/directory string /ftp.de.debian.org/debian
+d-i mirror/suite string wheezy
+d-i mirror/udeb/suite string wheezy
+d-i passwd/root-login boolean true
+d-i passwd/make-user boolean false
+d-i passwd/root-password password root
+d-i passwd/root-password-again password root
+d-i clock-setup/utc boolean true
+d-i time/zone string UTC
+d-i clock-setup/ntp boolean true
+d-i partman-auto/method string regular
+d-i partman-auto/choose_recipe select atomic
+d-i partman-partitioning/confirm_write_new_label boolean true
+d-i partman/choose_partition select finish
+d-i partman/confirm boolean true
+d-i partman/confirm_nooverwrite boolean true
+d-i base-installer/install-recommends boolean false
+d-i base-installer/kernel/image select none
+tasksel tasksel/first multiselect 
+d-i pkgsel/include string xen-linux-system-amd64 xen-tools xen-utils bridge-utils nfs-common
+d-i finish-install/reboot_in_progress note
+popularity-contest popularity-contest/participate boolean true
+d-i debian-installer/exit/poweroff boolean true
+
+# differences in the late_command string are only the static ip in
+# /etc/network/interfaces and the hostname in /etc/hostname and
+# localhost in /etc/hosts
+
+d-i preseed/late_command string \
+echo 'T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100' >> /target/etc/inittab; \
+mv /target/etc/grub.d/10_linux /target/etc/grub.d/21_linux; \
+echo 'GRUB_CMDLINE_LINUX="console=ttyS0"' >> /target/etc/default/grub; \
+echo 'GRUB_TERMINAL=serial'               >> /target/etc/default/grub; \
+in-target update-grub; \
+echo '127.0.0.1 localhost' > /target/etc/hosts; \
+echo '127.0.1.1 client1'  >> /target/etc/hosts; \
+echo '10.0.2.174 server' >> /target/etc/hosts; \
+echo '10.0.2.83 client1' >> /target/etc/hosts; \
+echo '10.0.2.84 client2' >> /target/etc/hosts; \
+echo 'client1' > /target/etc/hostname; \
+echo 'nameserver 10.0.2.3' > /target/etc/resolv.conf; \
+echo 'auto lo'                 > /target/etc/network/interfaces; \
+echo 'iface lo inet loopback' >> /target/etc/network/interfaces; \
+echo 'auto eth0'              >> /target/etc/network/interfaces; \
+echo 'iface eth0 inet static' >> /target/etc/network/interfaces; \
+echo ' address 10.0.2.83'     >> /target/etc/network/interfaces; \
+echo ' netmask 255.255.255.0' >> /target/etc/network/interfaces; \
+echo ' gateway 10.0.2.2'      >> /target/etc/network/interfaces; \
+echo '(network-script network-bridge)'      >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-server yes)'         >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-port 8002)'          >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-address '')'         >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-hosts-allow '"''"')' >> /target/etc/xen/xend-config.sxp; \
+echo 'kernel      = "/boot/vmlinuz-3.1.0-1-amd64"'     > /target/etc/xen/vm01.cfg; \
+echo 'ramdisk     = "/boot/initrd.img-3.1.0-1-amd64"' >> /target/etc/xen/vm01.cfg; \
+echo 'vcpus       = "1"'                              >> /target/etc/xen/vm01.cfg; \
+echo 'memory      = "128"'                            >> /target/etc/xen/vm01.cfg; \
+echo 'name        = "vm01"'                           >> /target/etc/xen/vm01.cfg; \
+echo 'hostname    = "vm01"'                           >> /target/etc/xen/vm01.cfg; \
+echo 'dhcp        = "dhcp"'                           >> /target/etc/xen/vm01.cfg; \
+echo 'vif         = [ "mac=00:16:3E:C7:09:32" ]'      >> /target/etc/xen/vm01.cfg; \
+echo 'nfs_server  = "10.0.2.174"'                     >> /target/etc/xen/vm01.cfg; \
+echo 'nfs_root    = "/data/export/vm01"'              >> /target/etc/xen/vm01.cfg; \
+echo 'root        = "/dev/nfs"'                       >> /target/etc/xen/vm01.cfg; \
+echo 'extra       = "boot=nfs root=/dev/nfs"'         >> /target/etc/xen/vm01.cfg; \
+echo 'on_poweroff = "destroy"'                        >> /target/etc/xen/vm01.cfg; \
+echo 'on_reboot   = "restart"'                        >> /target/etc/xen/vm01.cfg; \
+echo 'on_crash    = "restart"'                        >> /target/etc/xen/vm01.cfg;

client2.txt

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+# preseed options use dhcp for installation
+# temporary hostname during installation will be "install"
+
+d-i debian-installer/locale string en_US
+d-i console-keymaps-at/keymap select us
+d-i keyboard-configuration/xkb-keymap select us
+d-i netcfg/choose_interface select auto
+d-i netcfg/get_hostname string install
+d-i netcfg/get_domain string foobar.org
+d-i mirror/country string manual
+d-i mirror/http/hostname string 10.0.2.2:3142
+d-i mirror/http/directory string /ftp.de.debian.org/debian
+d-i mirror/suite string wheezy
+d-i mirror/udeb/suite string wheezy
+d-i passwd/root-login boolean true
+d-i passwd/make-user boolean false
+d-i passwd/root-password password root
+d-i passwd/root-password-again password root
+d-i clock-setup/utc boolean true
+d-i time/zone string UTC
+d-i clock-setup/ntp boolean true
+d-i partman-auto/method string regular
+d-i partman-auto/choose_recipe select atomic
+d-i partman-partitioning/confirm_write_new_label boolean true
+d-i partman/choose_partition select finish
+d-i partman/confirm boolean true
+d-i partman/confirm_nooverwrite boolean true
+d-i base-installer/install-recommends boolean false
+d-i base-installer/kernel/image select none
+tasksel tasksel/first multiselect 
+d-i pkgsel/include string xen-linux-system-amd64 xen-tools xen-utils bridge-utils nfs-common
+d-i finish-install/reboot_in_progress note
+popularity-contest popularity-contest/participate boolean true
+d-i debian-installer/exit/poweroff boolean true
+
+# differences in the late_command string are only the static ip in
+# /etc/network/interfaces and the hostname in /etc/hostname and
+# localhost in /etc/hosts
+
+d-i preseed/late_command string \
+echo 'T0:23:respawn:/sbin/getty -L ttyS0 9600 vt100' >> /target/etc/inittab; \
+mv /target/etc/grub.d/10_linux /target/etc/grub.d/21_linux; \
+echo 'GRUB_CMDLINE_LINUX="console=ttyS0"' >> /target/etc/default/grub; \
+echo 'GRUB_TERMINAL=serial'               >> /target/etc/default/grub; \
+in-target update-grub; \
+echo '127.0.0.1 localhost' > /target/etc/hosts; \
+echo '127.0.1.1 client2'  >> /target/etc/hosts; \
+echo '10.0.2.174 server' >> /target/etc/hosts; \
+echo '10.0.2.83 client1' >> /target/etc/hosts; \
+echo '10.0.2.84 client2' >> /target/etc/hosts; \
+echo 'client2' > /target/etc/hostname; \
+echo 'nameserver 10.0.2.3' > /target/etc/resolv.conf; \
+echo 'auto lo'                 > /target/etc/network/interfaces; \
+echo 'iface lo inet loopback' >> /target/etc/network/interfaces; \
+echo 'auto eth0'              >> /target/etc/network/interfaces; \
+echo 'iface eth0 inet static' >> /target/etc/network/interfaces; \
+echo ' address 10.0.2.84'     >> /target/etc/network/interfaces; \
+echo ' netmask 255.255.255.0' >> /target/etc/network/interfaces; \
+echo ' gateway 10.0.2.2'      >> /target/etc/network/interfaces; \
+echo '(network-script network-bridge)'      >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-server yes)'         >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-port 8002)'          >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-address '')'         >> /target/etc/xen/xend-config.sxp; \
+echo '(xend-relocation-hosts-allow '"''"')' >> /target/etc/xen/xend-config.sxp; \
+echo 'kernel      = "/boot/vmlinuz-3.1.0-1-amd64"'     > /target/etc/xen/vm01.cfg; \
+echo 'ramdisk     = "/boot/initrd.img-3.1.0-1-amd64"' >> /target/etc/xen/vm01.cfg; \
+echo 'vcpus       = "1"'                              >> /target/etc/xen/vm01.cfg; \
+echo 'memory      = "128"'                            >> /target/etc/xen/vm01.cfg; \
+echo 'name        = "vm01"'                           >> /target/etc/xen/vm01.cfg; \
+echo 'hostname    = "vm01"'                           >> /target/etc/xen/vm01.cfg; \
+echo 'dhcp        = "dhcp"'                           >> /target/etc/xen/vm01.cfg; \
+echo 'vif         = [ "mac=00:16:3E:C7:09:32" ]'      >> /target/etc/xen/vm01.cfg; \
+echo 'nfs_server  = "10.0.2.174"'                     >> /target/etc/xen/vm01.cfg; \
+echo 'nfs_root    = "/data/export/vm01"'              >> /target/etc/xen/vm01.cfg; \
+echo 'root        = "/dev/nfs"'                       >> /target/etc/xen/vm01.cfg; \
+echo 'extra       = "boot=nfs root=/dev/nfs"'         >> /target/etc/xen/vm01.cfg; \
+echo 'on_poweroff = "destroy"'                        >> /target/etc/xen/vm01.cfg; \
+echo 'on_reboot   = "restart"'                        >> /target/etc/xen/vm01.cfg; \
+echo 'on_crash    = "restart"'                        >> /target/etc/xen/vm01.cfg;