Script to automate spawning of VNF instance

spawnvnf.sh

#!/bin/bash

# This is a sample script that automates the creation of necessary neutron resources
# and spawning of a VNF as shown in proposal-1.
# Usage:
# To simply create the necessary Neutron resources run the following command
# ./spawnvnf.sh
# To create resources and also to Spawn the VNF, run the command
# ./spawnvnf.sh vnf
# For cleanup, run the command
# ./spawnvnf.sh d

SITE=2

if [ $SITE == 1 ] 
then
  TENANT_SUBNET_CIDR=30.0.0.0/24
  REMOTE_SUBNET_CIDR=40.0.0.0/24
  VNF_INT_PORT_IPADDRESS=30.0.0.100
else
  TENANT_SUBNET_CIDR=40.0.0.0/24
  REMOTE_SUBNET_CIDR=30.0.0.0/24
  VNF_INT_PORT_IPADDRESS=40.0.0.100
fi



if [ $# -gt 0 ]  && [ $1 == 'd' ]; then
  echo "Deleting the resources, please wait..."
  VNF_VM=$(openstack server list | grep vnf-vpn | awk '{print $2}')
  if [ ! -z $VNF_VM ]
  then
    echo "Deleting the VNF"
    nova delete vnf-vpn
  fi  
  openstack router set --no-route router1
  openstack router unset --external-gateway router1
  openstack router remove subnet router1 tenant_subnet
  VNF_EXT_PORT_UUID=$(openstack port list | grep vnf-ext-port | awk '{print $2}')
  VNF_INT_PORT_UUID=$(openstack port list | grep vnf-int-port | awk '{print $2}')
  openstack port delete $VNF_EXT_PORT_UUID
  openstack port delete $VNF_INT_PORT_UUID
  openstack router delete router1
  openstack subnet delete tenant_subnet
  openstack network delete tenant_net
  exit 0
fi

EXT_NET=$(openstack network list | grep ext-net | awk '{print $2}')
if [ -z $EXT_NET ]
then
  echo "External network is missing, please create the external network"
  exit 1
fi

IMGLIST=$(openstack flavor list | grep m1.extra_tiny | awk '{print $2}')
if [ -z $IMGLIST ]
then
  echo "Creating a tiny flavor"
  nova flavor-create --is-public true m1.extra_tiny auto 100 0 1 --rxtx-factor 1
else
  echo "Skipping flavor creation as its already present"
fi

TENANT_NETWORK=$(openstack network list | grep tenant_net | awk '{print $2}')
if [ -z $TENANT_NETWORK ]
then
  echo "Creating the necessary resources for VPN Orchestration"
  openstack network create tenant_net
  neutron subnet-create --name tenant_subnet --ip-version 4 tenant_net $TENANT_SUBNET_CIDR
  TENANT_SUBNET_UUID=$(openstack subnet list | grep tenant_subnet | awk '{print $2}')
  openstack router create router1
  openstack router add subnet router1 tenant_subnet
  echo "Associating the router to the ext-net"
  openstack router set --external-gateway ext-net router1
  neutron port-create --name vnf-ext-port ext-net
  neutron port-create --name vnf-int-port --fixed-ip subnet_id=$TENANT_SUBNET_UUID,ip_address=$VNF_INT_PORT_IPADDRESS tenant_net
  VNF_EXT_PORT_UUID=$(openstack port list | grep vnf-ext-port | awk '{print $2}')
  VNF_INT_PORT_UUID=$(openstack port list | grep vnf-int-port | awk '{print $2}')
  neutron subnet-update tenant_subnet --host-routes type=dict list=true destination=$REMOTE_SUBNET_CIDR,nexthop=$VNF_INT_PORT_IPADDRESS
  openstack router set --route destination=$REMOTE_SUBNET_CIDR,gateway=$VNF_INT_PORT_IPADDRESS router1
else
  echo "Skipping creation of resources as they are already present"
fi

if [ $# -gt 0 ]  && [ $1 == 'vnf' ]; then
  VNF_VM=$(openstack server list | grep vnf-vpn | awk '{print $2}')
  if [ -z $VNF_VM ]
  then
    echo "Creating a VNF in the tenant network..."
    VNF_IMAGE=$(openstack image list | grep cirros | awk '{print $2}')
    VNF_EXT_PORT_UUID=$(openstack port list | grep vnf-ext-port | awk '{print $2}')
    VNF_INT_PORT_UUID=$(openstack port list | grep vnf-int-port | awk '{print $2}')
    nova boot --image $VNF_IMAGE --flavor m1.extra_tiny --nic port-id=$VNF_INT_PORT_UUID --nic port-id=$VNF_EXT_PORT_UUID vnf-vpn
  else
    echo "Skipping VNF creation as the VM is already running."
  fi
fi