Install Xen and Ganeti on a Debian server

Ganet_Xen_install.md

HOW-TO Install Ganeti/Xen/DRBD ?

You need a Volum Group on your server (LVM) named "vgganeti" for store VMs.

apt-get update && apt-get dist-upgrade
apt-get install git vim aptitude sudo htop screen curl openssh-server locales
apt-get -y install xen-linux-system xen-tools
dpkg-divert --divert /etc/grub.d/08_linux_xen --rename /etc/grub.d/20_linux_xen
sed -i '/TOOLSTACK/s/=.*/=xl/' /etc/default/xen
echo 'GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=1024M,max:1024M \
  dom0_max_vcpus=1 dom0_vcpus_pin"' > /etc/default/grub

Give a static IP for eth0 /etc/network/interfaces

auto  eth0
iface eth0 inet manual
auto xenbr0
iface xenbr0 inet static
  address   <IpAddr> 
  broadcast <BroadcastAddr>
  netmask   <NetMaskAddr>
  gateway   <GWAddr>
  bridge_ports eth0
  bridge_stp off       
  bridge_waitport 0   
  bridge_fd 0 ```
###### Check this on /etc/default/xen :
`XENDOMAINS_SAVE=`
###### Let's reboot and install Ganeti :
```shell
update-grub
reboot
mkdir /root/.ssh/
apt-get install ganeti2 ganeti-instance-debootstrap
cd /boot
ln -s vmlinuz-3.16.0-4-amd64 vmlinuz-3-xenU
ln -s initrd.img-3.16.0-4-amd64 initrd-3-xenU
apt-get install drbd8-utils
echo "options drbd minor_count=128 usermode_helper=/bin/true" \
   > /etc/modprobe.d/drbd.conf
echo "drbd" >> /etc/modules
depmod -a
modprobe drbd
service ganeti restart

Edit /etc/hosts and add 2 IP, the server's IP and any cluster's IP (on same range)

127.0.0.1	localhost
192.168.1.5 serv1
192.168.1.50 cluster-ip

Let's Init the Cluster

gnt-cluster init --vg-name=vgganeti --master-netdev=xenbr0 \
  --vg-name vgganeti cluster-name

Change this on /var/lig/ganeti/config.data :

"xen_cmd":"xl"},
"link":"xenbr0",
"initrd_path":"/boot/initrd-3-xenU",
"kernel_args":"ro",
"kernel_path":"/boot/vmlinuz-3-xenU

Let's restart Ganeti

service ganeti restart