#!/bin/bash
##############################################################################
# Copyright (c) 2015 Tim Rozet (Red Hat), Dan Radez (Red Hat) and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################

# Deploy script to install provisioning server for OPNFV Apex
# author: Dan Radez (dradez@redhat.com)
# author: Tim Rozet (trozet@redhat.com)
#
# Based on RDO Manager http://www.rdoproject.org

set -e

##VARIABLES
reset=$(tput sgr0 || echo "")
blue=$(tput setaf 4 || echo "")
red=$(tput setaf 1 || echo "")
green=$(tput setaf 2 || echo "")

interactive="FALSE"
ping_site="8.8.8.8"
ntp_server="pool.ntp.org"
net_isolation_enabled="TRUE"
post_config="TRUE"
debug="FALSE"

declare -i CNT
declare UNDERCLOUD
declare -A deploy_options_array
declare -a performance_options
declare -A NET_MAP

SSH_OPTIONS=(-o StrictHostKeyChecking=no -o GlobalKnownHostsFile=/dev/null -o UserKnownHostsFile=/dev/null -o LogLevel=error)
DEPLOY_OPTIONS=""
CONFIG=${CONFIG:-'/var/opt/opnfv'}
RESOURCES=${RESOURCES:-"$CONFIG/images"}
LIB=${LIB:-"$CONFIG/lib"}
OPNFV_NETWORK_TYPES="admin_network private_network public_network storage_network api_network"

VM_CPUS=4
VM_RAM=8
VM_COMPUTES=2

# Netmap used to map networks to OVS bridge names
NET_MAP['admin_network']="br-admin"
NET_MAP['private_network']="br-private"
NET_MAP['public_network']="br-public"
NET_MAP['storage_network']="br-storage"
NET_MAP['api_network']="br-api"
ext_net_type="interface"
ip_address_family=4

# Libraries
lib_files=(
$LIB/common-functions.sh
$LIB/configure-deps-functions.sh
$LIB/parse-functions.sh
$LIB/virtual-setup-functions.sh
$LIB/undercloud-functions.sh
$LIB/utility-functions.sh
$LIB/installer/onos/onos_gw_mac_update.sh
)
for lib_file in ${lib_files[@]}; do
  if ! source $lib_file; then
    echo -e "${red}ERROR: Failed to source $lib_file${reset}"
    exit 1
  fi
done

##FUNCTIONS
##checks if prefix exists in string
##params: string, prefix
##usage: contains_prefix "deploy_setting_launcher=1" "deploy_setting"
contains_prefix() {
  local mystr=$1
  local prefix=$2
  if echo $mystr | grep -E "^$prefix.*$" > /dev/null; then
    return 0
  else
    return 1
  fi
}

##verify internet connectivity
#params: none
function verify_internet {
  if ping -c 2 $ping_site > /dev/null; then
    if ping -c 2 www.google.com > /dev/null; then
      echo "${blue}Internet connectivity detected${reset}"
      return 0
    else
      echo "${red}Internet connectivity detected, but DNS lookup failed${reset}"
      return 1
    fi
  else
    echo "${red}No internet connectivity detected${reset}"
    return 1
  fi
}

##preping it for deployment and launch the deploy
##params: none
function undercloud_prep_overcloud_deploy {
  if [[ "${#deploy_options_array[@]}" -eq 0 || "${deploy_options_array['sdn_controller']}" == 'opendaylight' ]]; then
    if [ "${deploy_options_array['sdn_l3']}" == 'True' ]; then
      DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/opendaylight_l3.yaml"
    elif [ "${deploy_options_array['sfc']}" == 'True' ]; then
      DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/opendaylight_sfc.yaml"
    elif [ "${deploy_options_array['vpn']}" == 'True' ]; then
      DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/opendaylight_sdnvpn.yaml"
    elif [ "${deploy_options_array['vpp']}" == 'True' ]; then
      DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/opendaylight_fdio.yaml"
    else
      DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/opendaylight.yaml"
    fi
    SDN_IMAGE=opendaylight
    if [ "${deploy_options_array['sfc']}" == 'True' ]; then
      SDN_IMAGE+=-sfc
      if [ ! -f $RESOURCES/overcloud-full-${SDN_IMAGE}.qcow2 ]; then
          echo "${red} $RESOURCES/overcloud-full-${SDN_IMAGE}.qcow2 is required to execute an SFC deployment."
          echo "Please install the opnfv-apex-opendaylight-sfc package to provide this overcloud image for deployment.${reset}"
          exit 1
      fi
    fi
  elif [ "${deploy_options_array['sdn_controller']}" == 'opendaylight-external' ]; then
    DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/opendaylight-external.yaml"
    SDN_IMAGE=opendaylight
  elif [ "${deploy_options_array['sdn_controller']}" == 'onos' ]; then
    DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/onos.yaml"
    SDN_IMAGE=onos
  elif [ "${deploy_options_array['sdn_controller']}" == 'opencontrail' ]; then
    echo -e "${red}ERROR: OpenContrail is currently unsupported...exiting${reset}"
    exit 1
  elif [[ -z "${deploy_options_array['sdn_controller']}" || "${deploy_options_array['sdn_controller']}" == 'False' ]]; then
    echo -e "${blue}INFO: SDN Controller disabled...will deploy nosdn scenario${reset}"
    SDN_IMAGE=opendaylight
  else
    echo "${red}Invalid sdn_controller: ${deploy_options_array['sdn_controller']}${reset}"
    echo "${red}Valid choices are opendaylight, opendaylight-external, onos, opencontrail, False, or null${reset}"
    exit 1
  fi



  # Make sure the correct overcloud image is available
  if [ ! -f $RESOURCES/overcloud-full-${SDN_IMAGE}.qcow2 ]; then
      echo "${red} $RESOURCES/overcloud-full-${SDN_IMAGE}.qcow2 is required to execute your deployment."
      echo "Both ONOS and OpenDaylight are currently deployed from this image."
      echo "Please install the opnfv-apex package to provide this overcloud image for deployment.${reset}"
      exit 1
  fi

  echo "Copying overcloud image to Undercloud"
  ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" "rm -f overcloud-full.qcow2"
  scp ${SSH_OPTIONS[@]} $RESOURCES/overcloud-full-${SDN_IMAGE}.qcow2 "stack@$UNDERCLOUD":overcloud-full.qcow2

  # Install ovs-dpdk inside the overcloud image if it is enabled.
  if [ "${deploy_options_array['dataplane']}" == 'ovs_dpdk' ]; then
    # install dpdk packages before ovs
    echo -e "${blue}INFO: Enabling kernel modules for dpdk inside overcloud image${reset}"

    ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
      cat << EOF > vfio_pci.modules
#!/bin/bash
exec /sbin/modprobe vfio_pci >/dev/null 2>&1
EOF

      cat << EOF > uio_pci_generic.modules
#!/bin/bash
exec /sbin/modprobe uio_pci_generic >/dev/null 2>&1
EOF

      LIBGUESTFS_BACKEND=direct virt-customize --upload vfio_pci.modules:/etc/sysconfig/modules/ \
                                               --upload uio_pci_generic.modules:/etc/sysconfig/modules/ \
                                               --run-command "chmod 0755 /etc/sysconfig/modules/vfio_pci.modules" \
                                               --run-command "chmod 0755 /etc/sysconfig/modules/uio_pci_generic.modules" \
                                               --run-command "yum install -y /root/dpdk_rpms/*" \
                                               -a overcloud-full.qcow2
EOI
  elif [ "${deploy_options_array['dataplane']}" != 'ovs' ]; then
    echo "${red}${deploy_options_array['dataplane']} not supported${reset}"
    exit 1
  fi

  # Set ODL version accordingly
  if [[ "${deploy_options_array['sdn_controller']}" == 'opendaylight' && "${deploy_options_array['odl_version']}" == 'boron' ]]; then
    ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
      LIBGUESTFS_BACKEND=direct virt-customize --run-command "yum -y remove opendaylight" \
                                               --run-command "yum -y install /root/boron/*" \
                                               -a overcloud-full.qcow2
EOI
  fi

  # Add performance deploy options if they have been set
  if [ ! -z "${deploy_options_array['performance']}" ]; then

    # Remove previous kernel args files per role
    ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" "rm -f Compute-kernel_params.txt"
    ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" "rm -f Controller-kernel_params.txt"

    # Push performance options to subscript to modify per-role images as needed
    for option in "${performance_options[@]}" ; do
      echo -e "${blue}Setting performance option $option${reset}"
      ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" "bash build_perf_image.sh $option"
    done

    # Build IPA kernel option ramdisks
    ssh -T ${SSH_OPTIONS[@]} "root@$UNDERCLOUD" <<EOI
/bin/cp -f /home/stack/ironic-python-agent.initramfs /root/
mkdir -p ipa/
pushd ipa
gunzip -c ../ironic-python-agent.initramfs | cpio -i
if [ ! -f /home/stack/Compute-kernel_params.txt ]; then
  touch /home/stack/Compute-kernel_params.txt
  chown stack /home/stack/Compute-kernel_params.txt
fi
/bin/cp -f /home/stack/Compute-kernel_params.txt tmp/kernel_params.txt
echo "Compute params set: "
cat tmp/kernel_params.txt
/bin/cp -f /root/image.py usr/lib/python2.7/site-packages/ironic_python_agent/extensions/image.py
/bin/cp -f /root/image.pyc usr/lib/python2.7/site-packages/ironic_python_agent/extensions/image.pyc
find . | cpio -o -H newc | gzip > /home/stack/Compute-ironic-python-agent.initramfs
chown stack /home/stack/Compute-ironic-python-agent.initramfs
if [ ! -f /home/stack/Controller-kernel_params.txt ]; then
  touch /home/stack/Controller-kernel_params.txt
  chown stack /home/stack/Controller-kernel_params.txt
fi
/bin/cp -f /home/stack/Controller-kernel_params.txt tmp/kernel_params.txt
echo "Controller params set: "
cat tmp/kernel_params.txt
find . | cpio -o -H newc | gzip > /home/stack/Controller-ironic-python-agent.initramfs
chown stack /home/stack/Controller-ironic-python-agent.initramfs
popd
/bin/rm -rf ipa/
EOI

    DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/numa.yaml"
  fi

  # make sure ceph is installed
  DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/storage-environment.yaml"

  # scale compute nodes according to inventory
  total_nodes=$(ssh -T ${SSH_OPTIONS[@]} "root@$UNDERCLOUD" "cat /home/stack/instackenv.json | grep -c memory")

  # check if HA is enabled
  if [[ "$ha_enabled" == "True" ]]; then
     DEPLOY_OPTIONS+=" --control-scale 3"
     compute_nodes=$((total_nodes - 3))
     DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/puppet-pacemaker.yaml"
  else
     compute_nodes=$((total_nodes - 1))
  fi

  if [ "$compute_nodes" -le 0 ]; then
    echo -e "${red}ERROR: Invalid number of compute nodes: ${compute_nodes}. Check your inventory file.${reset}"
    exit 1
  else
    echo -e "${blue}INFO: Number of compute nodes set for deployment: ${compute_nodes}${reset}"
    DEPLOY_OPTIONS+=" --compute-scale ${compute_nodes}"
  fi

  if [[ "$net_isolation_enabled" == "TRUE" ]]; then
     #DEPLOY_OPTIONS+=" -e /usr/share/openstack-tripleo-heat-templates/environments/network-isolation.yaml"
     DEPLOY_OPTIONS+=" -e network-environment.yaml"
  fi

  if [[ "$ha_enabled" == "True" ]] || [[ "$net_isolation_enabled" == "TRUE" ]]; then
     DEPLOY_OPTIONS+=" --ntp-server $ntp_server"
  fi

  if [[ ! "$virtual" == "TRUE" ]]; then
     DEPLOY_OPTIONS+=" --control-flavor control --compute-flavor compute"
  else
     DEPLOY_OPTIONS+=" -e virtual-environment.yaml"
  fi

  DEPLOY_OPTIONS+=" -e opnfv-environment.yaml"

  echo -e "${blue}INFO: Deploy options set:\n${DEPLOY_OPTIONS}${reset}"

  ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
if [ "$debug" == 'TRUE' ]; then
    LIBGUESTFS_BACKEND=direct virt-customize -a overcloud-full.qcow2 --root-password password:opnfvapex
fi

source stackrc
set -o errexit
echo "Uploading overcloud glance images"
openstack overcloud image upload

echo "Configuring undercloud and discovering nodes"
openstack baremetal import --json instackenv.json
openstack baremetal configure boot
bash -x set_perf_images.sh ${performance_roles[@]}
#if [[ -z "$virtual" ]]; then
#  openstack baremetal introspection bulk start
#fi
echo "Configuring flavors"
for flavor in baremetal control compute; do
  echo -e "${blue}INFO: Updating flavor: \${flavor}${reset}"
  if openstack flavor list | grep \${flavor}; then
    openstack flavor delete \${flavor}
  fi
  openstack flavor create --id auto --ram 4096 --disk 39 --vcpus 1 \${flavor}
  if ! openstack flavor list | grep \${flavor}; then
    echo -e "${red}ERROR: Unable to create flavor \${flavor}${reset}"
  fi
done
openstack flavor set --property "cpu_arch"="x86_64" --property "capabilities:boot_option"="local" baremetal
openstack flavor set --property "cpu_arch"="x86_64" --property "capabilities:boot_option"="local" --property "capabilities:profile"="control" control
openstack flavor set --property "cpu_arch"="x86_64" --property "capabilities:boot_option"="local" --property "capabilities:profile"="compute" compute
echo "Configuring nameserver on ctlplane network"
dns_server_ext=''
for dns_server in ${dns_servers}; do
  dns_server_ext="\${dns_server_ext} --dns-nameserver \${dns_server}"
done
neutron subnet-update \$(neutron subnet-list | grep -Ev "id|tenant|external|storage" | grep -v \\\\-\\\\- | awk {'print \$2'}) \${dns_server_ext}
echo "Executing overcloud deployment, this should run for an extended period without output."
sleep 60 #wait for Hypervisor stats to check-in to nova
# save deploy command so it can be used for debugging
cat > deploy_command << EOF
openstack overcloud deploy --templates $DEPLOY_OPTIONS --timeout 90
EOF
EOI

  if [ "$interactive" == "TRUE" ]; then
    if ! prompt_user "Overcloud Deployment"; then
      echo -e "${blue}INFO: User requests exit${reset}"
      exit 0
    fi
  fi

  ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
source stackrc
openstack overcloud deploy --templates $DEPLOY_OPTIONS --timeout 90
if ! heat stack-list | grep CREATE_COMPLETE 1>/dev/null; then
  $(typeset -f debug_stack)
  debug_stack
  exit 1
fi
EOI

  # Configure DPDK
  if [ "${deploy_options_array['dataplane']}" == 'ovs_dpdk' ]; then
    ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI || (echo "DPDK config failed, exiting..."; exit 1)
source stackrc
set -o errexit
for node in \$(nova list | grep novacompute | grep -Eo "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+"); do
echo "Running DPDK test app on \$node"
ssh -T ${SSH_OPTIONS[@]} "heat-admin@\$node" <<EOF
set -o errexit
sudo dpdk_helloworld --no-pci
sudo dpdk_nic_bind -s
EOF
done
EOI
  fi

  if [ "$debug" == 'TRUE' ]; then
      ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
source overcloudrc
echo "Keystone Endpoint List:"
openstack endpoint list
echo "Keystone Service List"
openstack service list
cinder quota-show \$(openstack project list | grep admin | awk {'print \$2'})
EOI
  fi
}

##Post configuration after install
##params: none
function configure_post_install {
  local opnfv_attach_networks ovs_ip ip_range net_cidr tmp_ip
  opnfv_attach_networks="admin_network public_network"

  echo -e "${blue}INFO: Post Install Configuration Running...${reset}"

  echo -e "${blue}INFO: Configuring ssh for root to overcloud nodes...${reset}"
  # copy host key to instack
  scp ${SSH_OPTIONS[@]} /root/.ssh/id_rsa.pub "stack@$UNDERCLOUD":jumphost_id_rsa.pub

  # add host key to overcloud nodes authorized keys
  ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" << EOI
source stackrc
nodes=\$(nova list | grep -Eo "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+")
for node in \$nodes; do
cat ~/jumphost_id_rsa.pub | ssh -T ${SSH_OPTIONS[@]} "heat-admin@\$node" 'cat >> ~/.ssh/authorized_keys'
done
EOI

  if [ "${deploy_options_array['dataplane']}" == 'ovs_dpdk' ]; then
    echo -e "${blue}INFO: Bringing up br-phy and ovs-agent for dpdk compute nodes...${reset}"
    compute_nodes=$(undercloud_connect stack "source stackrc; nova list | grep compute | wc -l")
    i=0
    while [ "$i" -lt "$compute_nodes" ]; do
      overcloud_connect compute${i} "sudo ifup br-phy; sudo systemctl restart neutron-openvswitch-agent"
      i=$((i + 1))
    done
  fi

  ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
source overcloudrc
set -o errexit
echo "Configuring Neutron external network"
neutron net-create external --router:external=True --tenant-id \$(openstack project show service | grep id | awk '{ print \$4 }')
neutron subnet-create --name external-net --tenant-id \$(openstack project show service | grep id | awk '{ print \$4 }') --disable-dhcp external --gateway ${public_network_gateway} --allocation-pool start=${public_network_floating_ip_range%%,*},end=${public_network_floating_ip_range##*,} ${public_network_cidr}

echo "Removing sahara endpoint and service"
sahara_service_id=\$(openstack service list | grep sahara | cut -d ' ' -f 2)
sahara_endpoint_id=\$(openstack endpoint list | grep sahara | cut -d ' ' -f 2)
openstack endpoint delete \$sahara_endpoint_id
openstack service delete \$sahara_service_id

echo "Removing swift endpoint and service"
swift_service_id=\$(openstack service list | grep swift | cut -d ' ' -f 2)
swift_endpoint_id=\$(openstack endpoint list | grep swift | cut -d ' ' -f 2)
openstack endpoint delete \$swift_endpoint_id
openstack service delete \$swift_service_id

if [ "${deploy_options_array['congress']}" == 'True' ]; then
    for s in nova neutronv2 ceilometer cinder glancev2 keystone; do
        openstack congress datasource create \$s "\$s" \\
            --config username=\$OS_USERNAME \\
            --config tenant_name=\$OS_TENANT_NAME \\
            --config password=\$OS_PASSWORD \\
            --config auth_url=\$OS_AUTH_URL
    done
fi
EOI

  echo -e "${blue}INFO: Checking if OVS bridges have IP addresses...${reset}"
  for network in ${opnfv_attach_networks}; do
    ovs_ip=$(find_ip ${NET_MAP[$network]})
    tmp_ip=''
    if [ -n "$ovs_ip" ]; then
      echo -e "${blue}INFO: OVS Bridge ${NET_MAP[$network]} has IP address ${ovs_ip}${reset}"
    else
      echo -e "${blue}INFO: OVS Bridge ${NET_MAP[$network]} missing IP, will configure${reset}"
      # use last IP of allocation pool
      eval "ip_range=\${${network}_usable_ip_range}"
      ovs_ip=${ip_range##*,}
      eval "net_cidr=\${${network}_cidr}"
      sudo ip addr add ${ovs_ip}/${net_cidr##*/} dev ${NET_MAP[$network]}
      sudo ip link set up ${NET_MAP[$network]}
      tmp_ip=$(find_ip ${NET_MAP[$network]})
      if [ -n "$tmp_ip" ]; then
        echo -e "${blue}INFO: OVS Bridge ${NET_MAP[$network]} IP set: ${tmp_ip}${reset}"
        continue
      else
        echo -e "${red}ERROR: Unable to set OVS Bridge ${NET_MAP[$network]} with IP: ${ovs_ip}${reset}"
        return 1
      fi
    fi
  done

  # for virtual, we NAT public network through Undercloud
  if [ "$virtual" == "TRUE" ]; then
    if ! configure_undercloud_nat ${public_network_cidr}; then
      echo -e "${red}ERROR: Unable to NAT undercloud with external net: ${public_network_cidr}${reset}"
      exit 1
    else
      echo -e "${blue}INFO: Undercloud VM has been setup to NAT Overcloud public network${reset}"
    fi
  fi

  # for sfc deployments we need the vxlan workaround
  if [ "${deploy_options_array['sfc']}" == 'True' ]; then
      ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
source stackrc
set -o errexit
for node in \$(nova list | grep -Eo "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+"); do
ssh -T ${SSH_OPTIONS[@]} "heat-admin@\$node" <<EOF
sudo ifconfig br-int up
sudo ip route add 123.123.123.0/24 dev br-int
EOF
done
EOI
  fi

  # Collect deployment logs
  ssh -T ${SSH_OPTIONS[@]} "stack@$UNDERCLOUD" <<EOI
mkdir -p ~/deploy_logs
rm -rf deploy_logs/*
source stackrc
set -o errexit
for node in \$(nova list | grep -Eo "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+"); do
 ssh -T ${SSH_OPTIONS[@]} "heat-admin@\$node" <<EOF
 sudo cp /var/log/messages /home/heat-admin/messages.log
 sudo chown heat-admin /home/heat-admin/messages.log
EOF
scp ${SSH_OPTIONS[@]} heat-admin@\$node:/home/heat-admin/messages.log ~/deploy_logs/\$node.messages.log
if [ "$debug" == "TRUE" ]; then
    nova list --ip \$node
    echo "---------------------------"
    echo "-----/var/log/messages-----"
    echo "---------------------------"
    cat ~/deploy_logs/\$node.messages.log
    echo "---------------------------"
    echo "----------END LOG----------"
    echo "---------------------------"
fi
 ssh -T ${SSH_OPTIONS[@]} "heat-admin@\$node" <<EOF
 sudo rm -f /home/heat-admin/messages.log
EOF
done

# Print out the undercloud IP and dashboard URL
source stackrc
echo "Undercloud IP: $UNDERCLOUD, please connect by doing 'opnfv-util undercloud'"
echo "Overcloud dashboard available at http://\$(heat output-show overcloud PublicVip | sed 's/"//g')/dashboard"
EOI

}

display_usage() {
  echo -e "Usage:\n$0 [arguments] \n"
  echo -e "   -d|--deploy-settings : Full path to deploy settings yaml file. Optional.  Defaults to null"
  echo -e "   -i|--inventory : Full path to inventory yaml file. Required only for baremetal"
  echo -e "   -n|--net-settings : Full path to network settings file. Optional."
  echo -e "   -p|--ping-site : site to use to verify IP connectivity. Optional. Defaults to 8.8.8.8"
  echo -e "   -v|--virtual : Virtualize overcloud nodes instead of using baremetal."
  echo -e "   --flat : disable Network Isolation and use a single flat network for the underlay network."
  echo -e "   --no-post-config : disable Post Install configuration."
  echo -e "   --debug : enable debug output."
  echo -e "   --interactive : enable interactive deployment mode which requires user to confirm steps of deployment."
  echo -e "   --virtual-cpus : Number of CPUs to use per Overcloud VM in a virtual deployment (defaults to 4)."
  echo -e "   --virtual-ram : Amount of RAM to use per Overcloud VM in GB (defaults to 8)."
}

##translates the command line parameters into variables
##params: $@ the entire command line is passed
##usage: parse_cmd_line() "$@"
parse_cmdline() {
  echo -e "\n\n${blue}This script is used to deploy the Apex Installer and Provision OPNFV Target System${reset}\n\n"
  echo "Use -h to display help"
  sleep 2

  while [ "${1:0:1}" = "-" ]
  do
    case "$1" in
        -h|--help)
                display_usage
                exit 0
            ;;
        -d|--deploy-settings)
                DEPLOY_SETTINGS_FILE=$2
                echo "Deployment Configuration file: $2"
                shift 2
            ;;
        -i|--inventory)
                INVENTORY_FILE=$2
                shift 2
            ;;
        -n|--net-settings)
                NETSETS=$2
                echo "Network Settings Configuration file: $2"
                shift 2
            ;;
        -p|--ping-site)
                ping_site=$2
                echo "Using $2 as the ping site"
                shift 2
            ;;
        -v|--virtual)
                virtual="TRUE"
                echo "Executing a Virtual Deployment"
                shift 1
            ;;
        --flat )
                net_isolation_enabled="FALSE"
                echo "Underlay Network Isolation Disabled: using flat configuration"
                shift 1
            ;;
        --no-post-config )
                post_config="FALSE"
                echo "Post install configuration disabled"
                shift 1
            ;;
        --debug )
                debug="TRUE"
                echo "Enable debug output"
                shift 1
            ;;
        --interactive )
                interactive="TRUE"
                echo "Interactive mode enabled"
                shift 1
            ;;
        --virtual-cpus )
                VM_CPUS=$2
                echo "Number of CPUs per VM set to $VM_CPUS"
                shift 2
            ;;
        --virtual-ram )
                VM_RAM=$2
                echo "Amount of RAM per VM set to $VM_RAM"
                shift 2
            ;;
        --virtual-computes )
                VM_COMPUTES=$2
                echo "Virtual Compute nodes set to $VM_COMPUTES"
                shift 2
            ;;
        *)
                display_usage
                exit 1
            ;;
    esac
  done

  if [[ ! -z "$NETSETS" && "$net_isolation_enabled" == "FALSE" ]]; then
    echo -e "${red}INFO: Single flat network requested. Only admin_network settings will be used!${reset}"
  elif [[ -z "$NETSETS" ]]; then
    echo -e "${red}ERROR: You must provide a network_settings file with -n.${reset}"
    exit 1
  fi

  if [[ -n "$virtual" && -n "$INVENTORY_FILE" ]]; then
    echo -e "${red}ERROR: You should not specify an inventory with virtual deployments${reset}"
    exit 1
  fi

  if [[ -z "$DEPLOY_SETTINGS_FILE" || ! -f "$DEPLOY_SETTINGS_FILE" ]]; then
    echo -e "${red}ERROR: Deploy Settings: ${DEPLOY_SETTINGS_FILE} does not exist! Exiting...${reset}"
    exit 1
  fi

  if [[ ! -z "$NETSETS" && ! -f "$NETSETS" ]]; then
    echo -e "${red}ERROR: Network Settings: ${NETSETS} does not exist! Exiting...${reset}"
    exit 1
  fi

  if [[ ! -z "$INVENTORY_FILE" && ! -f "$INVENTORY_FILE" ]]; then
    echo -e "{$red}ERROR: Inventory File: ${INVENTORY_FILE} does not exist! Exiting...${reset}"
    exit 1
  fi

  if [[ -z "$virtual" && -z "$INVENTORY_FILE" ]]; then
    echo -e "${red}ERROR: You must specify an inventory file for baremetal deployments! Exiting...${reset}"
    exit 1
  fi

  if [[ "$net_isolation_enabled" == "FALSE" && "$post_config" == "TRUE" ]]; then
    echo -e "${blue}INFO: Post Install Configuration will be skipped.  It is not supported with --flat${reset}"
    post_config="FALSE"
  fi

}

##END FUNCTIONS

main() {
  parse_cmdline "$@"
  echo -e "${blue}INFO: Parsing network settings file...${reset}"
  parse_network_settings
  if ! configure_deps; then
    echo -e "${red}Dependency Validation Failed, Exiting.${reset}"
    exit 1
  fi
  if [ -n "$DEPLOY_SETTINGS_FILE" ]; then
    echo -e "${blue}INFO: Parsing deploy settings file...${reset}"
    parse_deploy_settings
  fi
  setup_undercloud_vm
  if [ "$virtual" == "TRUE" ]; then
    setup_virtual_baremetal $VM_CPUS $VM_RAM
  elif [ -n "$INVENTORY_FILE" ]; then
    parse_inventory_file
  fi
  configure_undercloud
  undercloud_prep_overcloud_deploy
  if [ "$post_config" == "TRUE" ]; then
    if ! configure_post_install; then
      echo -e "${red}ERROR:Post Install Configuration Failed, Exiting.${reset}"
      exit 1
    else
      echo -e "${blue}INFO: Post Install Configuration Complete${reset}"
    fi
  fi
  if [[ "${deploy_options_array['sdn_controller']}" == 'onos' ]]; then
    if ! onos_update_gw_mac ${public_network_cidr} ${public_network_gateway}; then
      echo -e "${red}ERROR:ONOS Post Install Configuration Failed, Exiting.${reset}"
      exit 1
    else
      echo -e "${blue}INFO: ONOS Post Install Configuration Complete${reset}"
    fi
  fi
}

main "$@"