Install Xen 4.5 with Remus and DRBD on Ubuntu 12.10
[ This install Xen part needs to be updated, The install DRBD part is compatible with Xen 4.5 ]
This example uses two servers, "left" (server #1), and "right" (server #2).
Contents
Install a new Ubuntu 12.10 system
Both Servers
Choose 'Use entire disk with LVM', but only use like 15GB for the system to leave the rest for VMs
Network setup
apt-get install bridge-utils vi /etc/network/interfaces # auto xenbr0 iface xenbr0 inet static address 10.0.1.50 netmask 255.255.255.0 gateway 10.0.1.1 dns-nameservers 10.0.1.1 bridge_ports eth0 auto eth0 iface eth0 inet manual # /etc/init.d/networking restart
vi /etc/hosts # 10.0.1.50 left 10.0.1.51 right #
Install Xen
Install Xen Prerequisites
Server #1
Short-cut install for dependencies
apt-get build-dep xen apt-get install libc6-dev libglib2.0-dev libyajl-dev yajl-tools libbz2-dev bison flex zlib1g-dev git-core texinfo debhelper debconf-utils debootstrap fakeroot
If you're missing something, here's the full list
apt-get install libjpeg-turbo8-dev apt-get install libvncserver-dev apt-get install git-core mercurial screen tcpdump minicom ntp ntpdate tree debootstrap bcc bin86 gawk bridge-utils apt-get install iproute libcurl3 libcurl4-openssl-dev bzip2 module-init-tools transfig tgif texinfo pciutils-dev build-essential make gcc apt-get install libc6-dev zlib1g-dev python python-dev python-twisted libncurses5-dev patch libvncserver-dev iasl libbz2-dev apt-get install e2fslibs-dev uuid-dev libtext-template-perl autoconf debhelper debconf-utils docbook-xml docbook-xsl dpatch xsltproc rcconf bison flex apt-get install gcc-multilib ocaml-findlib libyajl-dev yajl-tools libglib2.0-dev libsdl-ttf2.0-0 libsdl-ttf2.0-dev
Install Xen 4.2.1
Server #1
apt-get install transfig libpixman-1-dev #latest apt-get install git-core git clone git://xenbits.xen.org/xen.git #release wget http://bits.xensource.com/oss-xen/release/4.2.1/xen-4.2.1.tar.gz tar zxvf xen-4.2.1.tar.gz cd xen-4.2.1 wget http://download.locatrix.com/xen/remus-qdisc-py.patch patch -p1 < remus-qdisc-py.patch ./configure vi ./.config # PYTHON_PREFIX_ARG=--install-layout=deb # make world make deb tar zcvf xen-dist.tgz ./xen-4.2.1/dist scp ./xen-dist.tgz eross@10.0.1.50:.
Server #2
tar zxvf xen-dist.tgz
Both servers
cd /home/eross/xen-4.2.1/dist ./install.sh update-grub ls -al /boot/xen* -rw-r--r-- 1 root root 802303 Jan 30 20:57 /boot/xen-4.2.1.gz lrwxrwxrwx 1 root root 12 Jan 30 20:57 /boot/xen-4.2.gz -> xen-4.2.1.gz lrwxrwxrwx 1 root root 12 Jan 30 20:57 /boot/xen-4.gz -> xen-4.2.1.gz lrwxrwxrwx 1 root root 12 Jan 30 20:57 /boot/xen.gz -> xen-4.2.1.gz -rw-r--r-- 1 root root 15388780 Jan 30 20:57 /boot/xen-syms-4.2.1 update-rc.d xencommons defaults 19 18 update-rc.d xendomains defaults 21 20 update-rc.d xen-watchdog defaults 22 23 grep Xen /boot/grub/grub.cfg # You should see "Ubuntu GNU\/Linux, with Xen hypervisor" in there, that's where I got the below from sed -i 's/GRUB_DEFAULT=.*\+/GRUB_DEFAULT="Ubuntu GNU\/Linux, with Xen hypervisor"/' /etc/default/grub update-grub # xen-tools gives you some handy scripts for creating guests # http://packages.ubuntu.com/quantal/all/xen-tools/filelist apt-get install libtext-template-perl libconfig-inifiles-perl libfile-slurp-perl liblist-moreutils-perl wget http://mirror.pnl.gov/ubuntu/pool/universe/x/xen-tools/xen-tools_4.3.1-1_all.deb dpkg -i xen-tools_4.3.1-1_all.deb reboot
Optional: Test Xen
Either server
xen-create-image --hostname=ubuntu \ --memory=512mb \ --vcpus=2 \ --lvm=right \ --dhcp \ --pygrub \ --dist=precise # This may take a few minutes, it's running things and downloading in the background # See what's going on here in another window: tail -f /etc/xen/ubuntu.cfg # Hint: Press Ctrl+] to exit the console view xl create /etc/xen/ubuntu.cfg -c # see it running xl list # reconnect xl console ubuntu
Hint: Tapping escape while booting should display grub menu if needed for debugging
Install DRBD
Note: Installs /etc/xen/scripts/block-drbd for xen drbd block support as well
Server #1
apt-get install autoconf build-essential ######################Updated to work with Xen 4.5 git clone https://github.com/macrosheep/remus-drbd cd ./remus-drbd ./autogen.sh ./configure --prefix=/usr --localstatedir=/var --sysconfdir=/etc --with-km make make install cd drbd make clean all make install vi /etc/modules # add drbd # tar zcvf drbd.tgz ./remus-drbd scp ./drbd.tgz user@10.0.1.51:.
Server #2
# NOTE: Server #2 must have exactly the same kernel version for you to use the binaries from server #1 # Double-check uname -a on both servers to confirm tar zxvf ./drbd.tgz cd ./drbd-8.3.11 make install vi /etc/modules # add drbd #
Both Servers
cp /home/user/drbd-8.3.11/scripts/global_common.conf.protoD /etc/drbd.d/global_common.conf cp /home/user/drbd-8.3.11/scripts/testvms_protoD.res /etc/drbd.d/SystemHA_protoD.res uname -a # right lvcreate -n test -L 10G right vi /etc/drbd.d/SystemHA_protoD.res # resource drbd-vm { device /dev/drbd1; disk /dev/right/test; meta-disk internal; on left { address 10.0.1.50:7791; } on right{ address 10.0.1.51:7791; } } # #Create the meta-data for the SystemHA-disk and then bring up the resource. Do this on both machines drbdadm create-md drbd-vm ###answer y or yes for all questions, in the above command drbdadm up drbd-vm ###Sanity check. You should see something like this in the output root@null:~$ cat /proc/drbd version: 8.3.9 (api:88/proto:86-95) GIT-hash: 3ba4fc581d6215744597b3d4c525db276ce000ee build by root@null, 2011-05-14 19:33:56 1: cs:Connected ro:Secondary/Secondary ds:Inconsistent/Inconsistent D r-----
Server #1 - this will override all of the DRBD data on server #2
drbdadm -- --overwrite-data-of-peer primary drbd-vm
Watch the progress of the transfer (either server)
cat /proc/drbd
Once completed you can continue on.
Notes:
- You don't need to set the secondary to primary manually. This will be done by the /etc/xen/scripts/block-drbd script. When Remus is running you can do 'cat /proc/drbd' and you'll notice the status will be Primary/Primary
- When configuring your VM, use drbd:drbd-vm for the disk. not phy:/… or any other format
- It's one VM per DRBD disk like this, so you have to create a new one for each VM
- You should do some research on DRBD and dual primary setups. They're potentially hard to manage, so forewarning you now.
Setup Remus
Both servers
vi /etc/xen/xend-config.sxp # Ensure the following are uncommented (xend-relocation-server yes) (xend-relocation-port 8002) (xend-relocation-address '') (xend-relocation-hosts-allow '') # vi /etc/modules # sch_plug sch_prio sch_ingress cls_basic cls_tcindex cls_u32 act_mirred ifb #
Test VM with Remus
Server #1
pvcreate /dev/drbd1 vgcreate drbdtest /dev/drbd1 xen-create-image --hostname=ubuntu \ --memory=512mb \ --vcpus=2 \ --lvm=drbdtest \ --dhcp \ --pygrub \ --dist=precise vi /etc/xen/rt.cfg # name = "rt" memory = 256 ####################Updated to work with Xen 4.5 disk = [ '/dev/drbd1,raw,xvda,rw,script=block-drbd' ] vif = [' '] kernel = "/var/lib/xen/images/ubuntu-netboot/vmlinuz" ramdisk = "/var/lib/xen/images/ubuntu-netboot/initrd.gz" extra = "debian-installer/exit/always_halt=true -- console=hvc0" # xm create /etc/xen/rt.cfg -c # run the install sudo ln -s /usr/lib/xen-4.1/bin/pygrub /usr/bin/pygrub vi /etc/xen/rt.cfg # bootloader = "pygrub" # comment out 'kernel' 'ramdisk' and 'extra' # # Press Ctrl+] to exit the console view xl create /etc/xen/rt.cfg -c # see it running xl list # test live migration, if you can't live migrate, then Remus isn't going to work either xl migrate --live rt right # try remus ("rt" is the domU, and "right" is the other server, assuming we're running from "left" here) remus -i 40 rt right # You should get a whole bunch of these messages: # PROF: flushed memory at 1361239602.516625 PROF: suspending at 1361239602.554033 #
Now if you kill the server in some way, the VM will come up automatically on the secondary.