gnew.sh

#!/bin/bash

memory=2048
vcpus=1
disksize=40
instancename=""
submit=""
nodes=""

function usage {
    echo 'usage: gnew.sh [-m <memory>] [-c <cpus>] [-d <disk_size>] -i <instance_name>
    -m <memory>         memory in MB to allocate (default 2048)
    -c <cpus>           number of cpus to allocate (default 1)
    -d <disk_size>      size of disk in GB to be created (default 40)
    -n <pri>:<sec>      specify primary and secondary nodes to use
    -s                  submit as a background job (default disabled)
    -i <instance_name>  name of new instance (required)
'
    return 0;
}

while [ "$1" ]; do
    case $1 in
        -m)
            shift
            memory=$1
            ;;
        -c)
            shift
            vcpus=$1
            ;;
        -d)
            shift
            disksize=$1
            ;;
        -s)
            submit="--submit"
            ;;
        -i)
            shift
            instancename=$1
            ;;
        -n)
            shift
            nodes=$1
            ;;
        *)
            usage
            exit 0
            ;;
    esac
    shift
done

if [ "$instancename" == "" ]; then
    echo "New instance name is required"
    usage
    exit 1
fi

if [ "$nodes" == "" ]; then
    allocator="-I hail"
else
    allocator="-n $nodes"
fi

/usr/sbin/gnt-instance add $allocator -o debootstrap+default  -t drbd -s ${disksize}G \
    -B maxmem=${memory}MB,minmem=${memory}MB,vcpus=$vcpus \
    -H kvm:kernel_path="",initrd_path="",kernel_args="",boot_order=network \
    --no-name-check --no-ip-check --no-install --no-start --no-wait-for-sync $submit $instancename