=Install Ganeti=
==Debian 9==
===Install packages===
```
apt-get install drbd-utils ganeti2 ganeti-instance-debootstrap qemu-kvm resolvconf lvm2 bridge-utils lzop
```
===PCI Passthrough===
/etc/modules
```
drbd
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd
```
/etc/modprobe.d/vfio.conf
GTX1080
```
options vfio-pci ids=10de:1b80,10de:10f0
```
===Networking===
```
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet manual
auto br-lan
iface br-lan inet static
address 134.197.X.X
netmask 255.255.255.0
gateway 134.197.X.X
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
# Replication network DRBD
auto eth1
iface eth1 inet manual
auto br-rep
iface br-rep inet static
address 172.X.X.X
netmask 255.255.255.0
bridge_ports eth1
bridge_stp off
bridge_fd 0
bridge_maxwait 0
```
===DRBD Setup===
```
lang=bash
echo "options drbd minor_count=128 usermode_helper=/bin/true" >/etc/modprobe.d/drbd.conf
echo "drbd" >>/etc/modules
rmmod drbd # ignore error if the module isn't already loaded
modprobe drbd
update-initramfs -u
```
===Initialize Master Node===
```
lang=bash
gnt-cluster init \
--master-netdev=br-lan \
--enabled-hypervisors=kvm \
-s 172.20.128.11 \
--vg-name vg-ganeti \
--compression-tools gzip,gzip-fast,gzip-slow,lzop \
$HOSTNAME
gnt-cluster modify -H kvm:kernel_path=,initrd_path=
#Fix DF logjam
openssl dhparam -out dhparams.pem 2048
cat dhparams.pem >> /var/lib/ganeti/server.pem
#Change default link
gnt-cluster modify --nic-parameters link=br-lan
```
===Add Node===
```
gnt-node add -s 172.X.X.X cnode#.cse.unr.edu
```
==Configuration==
===GFX Passthrough===
unbind the PCI devices
```
lang=bash
lspci -nn | grep $YOUR_PCI_DEVICE
echo > 1 /sys/bus/pci/devices/0000:42:00.0/remove
echo > 1 /sys/bus/pci/devices/0000:42:00.1/remove
echo > 1 /sys/bus/pci/devices/0000:04:00.1/remove
echo > 1 /sys/bus/pci/devices/0000:04:00.0/remove
echo 10de 1b80 | tee /sys/bus/pci/drivers/vfio-pci/new_id
echo 10de 10f0 | tee /sys/bus/pci/drivers/vfio-pci/new_id
```
Modify Ganeti after installing Ubuntu\CentOS\RHEL
```
lang=bash
gnt-instance modify -H kvm_extra="\
-drive if=pflash\,format=raw\,readonly\,file=/usr/share/OVMF/OVMF_CODE.fd \
-drive if=pflash\,format=raw\,file=/var/local/ovmf/$HOST \
-device vfio-pci\,host=04:00.0\,addr=0x9 \
-device vfio-pci\,host=04:00.1\,addr=0x10 \
-cpu host\,kvm=off" $HOST
gnt-instance modify -H vga=none $HOST
```
Grub Changes for booting
```
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=20
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT=""
GRUB_CMDLINE_LINUX="console=tty0 console=ttyS0,115200n8"
GRUB_TERMINAL=serial
GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
```
=Clusters=
==g.engr.unr.edu==
===Engineering Cluster===
```
g.engr.unr.edu
g1.engr.unr.edu
```
==Commands==
```
#Add an instance
gnt-instance add -t plain -o debootstrap+stretch --disk 0:size=200G -B vcpus=4,minmem=256M,maxmem=8192M --no-name-check --no-ip-check --no-start $HOSTNAME
#Boot from host kernel
gnt-instance start -H kernel_path=/var/tmp/vmlinuz,initrd_path=/var/tmp/initrd.img,kernel_args="" $HOSTNAME
#Import A Backup
gnt-backup import --src-node=g1.engr.unr.edu --src-dir=$SRC_DIR -t plain --no-name-check --no-ip-check $HOSTNAME
```