#!/bin/bash
#
# lib/neutron
# Install and start **Neutron** network services

# Dependencies:
#
# ``functions`` file
# ``DEST`` must be defined

# ``stack.sh`` calls the entry points in this order:
#
# - is_XXXX_enabled
# - install_XXXX
# - configure_XXXX
# - init_XXXX
# - start_XXXX
# - stop_XXXX
# - cleanup_XXXX

# Save trace setting
XTRACE=$(set +o | grep xtrace)
set +o xtrace

# Defaults
# --------

# Set up default directories
GITDIR["python-neutronclient"]=$DEST/python-neutronclient

# NEUTRON_DEPLOY_MOD_WSGI defines how neutron is deployed, allowed values:
# - False (default) : Run neutron under Eventlet
# - True : Run neutron under uwsgi
# TODO(annp): Switching to uwsgi in next cycle if things turn out to be stable
# enough
NEUTRON_DEPLOY_MOD_WSGI=$(trueorfalse False NEUTRON_DEPLOY_MOD_WSGI)
NEUTRON_AGENT=${NEUTRON_AGENT:-openvswitch}
NEUTRON_DIR=$DEST/neutron

NEUTRON_DISTRIBUTED_ROUTING=$(trueorfalse False NEUTRON_DISTRIBUTED_ROUTING)
# Distributed Virtual Router (DVR) configuration
# Can be:
# - ``legacy``          - No DVR functionality
# - ``dvr_snat``        - Controller or single node DVR
# - ``dvr``             - Compute node in multi-node DVR
# - ``dvr_no_external`` - Compute node in multi-node DVR, no external network
#
# Default is 'dvr_snat' since it can handle both DVR and legacy routers
NEUTRON_DVR_MODE=${NEUTRON_DVR_MODE:-dvr_snat}

NEUTRON_BIN_DIR=$(get_python_exec_prefix)
NEUTRON_DHCP_BINARY="neutron-dhcp-agent"

NEUTRON_CONF_DIR=/etc/neutron
NEUTRON_CONF=$NEUTRON_CONF_DIR/neutron.conf
NEUTRON_META_CONF=$NEUTRON_CONF_DIR/metadata_agent.ini
NEUTRON_META_DATA_HOST=${NEUTRON_META_DATA_HOST:-$(ipv6_unquote $SERVICE_HOST)}

NEUTRON_DHCP_CONF=$NEUTRON_CONF_DIR/dhcp_agent.ini
NEUTRON_L3_CONF=$NEUTRON_CONF_DIR/l3_agent.ini
NEUTRON_AGENT_CONF=$NEUTRON_CONF_DIR/
NEUTRON_CREATE_INITIAL_NETWORKS=${NEUTRON_CREATE_INITIAL_NETWORKS:-True}

NEUTRON_STATE_PATH=${NEUTRON_STATE_PATH:=$DATA_DIR/neutron}

NEUTRON_UWSGI_CONF=$NEUTRON_CONF_DIR/neutron-api-uwsgi.ini

# By default, use the ML2 plugin
NEUTRON_CORE_PLUGIN=${NEUTRON_CORE_PLUGIN:-ml2}
NEUTRON_CORE_PLUGIN_CONF_FILENAME=${NEUTRON_CORE_PLUGIN_CONF_FILENAME:-ml2_conf.ini}
NEUTRON_CORE_PLUGIN_CONF_PATH=$NEUTRON_CONF_DIR/plugins/$NEUTRON_CORE_PLUGIN
NEUTRON_CORE_PLUGIN_CONF=$NEUTRON_CORE_PLUGIN_CONF_PATH/$NEUTRON_CORE_PLUGIN_CONF_FILENAME

NEUTRON_METERING_AGENT_CONF_FILENAME=${NEUTRON_METERING_AGENT_CONF_FILENAME:-metering_agent.ini}
NEUTRON_METERING_AGENT_CONF=$NEUTRON_CONF_DIR/$NEUTRON_METERING_AGENT_CONF_FILENAME

NEUTRON_AGENT_BINARY=${NEUTRON_AGENT_BINARY:-neutron-$NEUTRON_AGENT-agent}
NEUTRON_L3_BINARY=${NEUTRON_L3_BINARY:-neutron-l3-agent}
NEUTRON_META_BINARY=${NEUTRON_META_BINARY:-neutron-metadata-agent}
NEUTRON_METERING_BINARY=${NEUTRON_METERING_BINARY:-neutron-metering-agent}

# Public facing bits
if is_service_enabled tls-proxy; then
    NEUTRON_SERVICE_PROTOCOL="https"
fi
NEUTRON_SERVICE_HOST=${NEUTRON_SERVICE_HOST:-$SERVICE_HOST}
NEUTRON_SERVICE_PORT=${NEUTRON_SERVICE_PORT:-9696}
NEUTRON_SERVICE_PORT_INT=${NEUTRON_SERVICE_PORT_INT:-19696}
NEUTRON_SERVICE_PROTOCOL=${NEUTRON_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}

NEUTRON_AUTH_STRATEGY=${NEUTRON_AUTH_STRATEGY:-keystone}
NEUTRON_ROOTWRAP=$(get_rootwrap_location neutron)
NEUTRON_ROOTWRAP_CONF_FILE=$NEUTRON_CONF_DIR/rootwrap.conf
NEUTRON_ROOTWRAP_CMD="$NEUTRON_ROOTWRAP $NEUTRON_ROOTWRAP_CONF_FILE"
NEUTRON_ROOTWRAP_DAEMON_CMD="$NEUTRON_ROOTWRAP-daemon $NEUTRON_ROOTWRAP_CONF_FILE"

# This is needed because _neutron_ovs_base_configure_l3_agent uses it to create
# an external network bridge
PUBLIC_BRIDGE=${PUBLIC_BRIDGE:-br-ex}
PUBLIC_BRIDGE_MTU=${PUBLIC_BRIDGE_MTU:-1500}

# Network type - default vxlan, however enables vlan based jobs to override
# using the legacy environment variable as well as a new variable in greater
# alignment with the naming scheme of this plugin.
NEUTRON_TENANT_NETWORK_TYPE=${NEUTRON_TENANT_NETWORK_TYPE:-vxlan}

NEUTRON_TENANT_VLAN_RANGE=${NEUTRON_TENANT_VLAN_RANGE:-${TENANT_VLAN_RANGE:-100:150}}

# Physical network for VLAN network usage.
NEUTRON_PHYSICAL_NETWORK=${NEUTRON_PHYSICAL_NETWORK:-}


# Additional neutron api config files
declare -a -g _NEUTRON_SERVER_EXTRA_CONF_FILES_ABS

# Functions
# ---------

# Test if any Neutron services are enabled
# is_neutron_enabled
function is_neutron_enabled {
    [[ ,${DISABLED_SERVICES} =~ ,"neutron" ]] && return 1
    [[ ,${ENABLED_SERVICES} =~ ,"neutron-" || ,${ENABLED_SERVICES} =~ ,"q-" ]] && return 0
    return 1
}

# Test if any Neutron services are enabled
# is_neutron_enabled
function is_neutron_legacy_enabled {
    # first we need to remove all "neutron-" from DISABLED_SERVICES list
    disabled_services_copy=$(echo $DISABLED_SERVICES | sed 's/neutron-//g')
    [[ ,${disabled_services_copy} =~ ,"neutron" ]] && return 1
    [[ ,${ENABLED_SERVICES} =~ ,"q-" ]] && return 0
    return 1
}

if is_neutron_legacy_enabled; then
    source $TOP_DIR/lib/neutron-legacy
fi

# cleanup_neutron() - Remove residual data files, anything left over from previous
# runs that a clean run would need to clean up
function cleanup_neutron_new {
    source $TOP_DIR/lib/neutron_plugins/${NEUTRON_AGENT}_agent
    if is_neutron_ovs_base_plugin; then
        neutron_ovs_base_cleanup
    fi

    if [[ $NEUTRON_AGENT == "linuxbridge" ]]; then
        neutron_lb_cleanup
    fi
    # delete all namespaces created by neutron
    for ns in $(sudo ip netns list | grep -o -E '(qdhcp|qrouter|qlbaas|fip|snat)-[0-9a-f-]*'); do
        sudo ip netns delete ${ns}
    done
}

# configure_root_helper_options() - Configure agent rootwrap helper options
function configure_root_helper_options {
    local conffile=$1
    iniset $conffile agent root_helper "sudo $NEUTRON_ROOTWRAP_CMD"
    iniset $conffile agent root_helper_daemon "sudo $NEUTRON_ROOTWRAP_DAEMON_CMD"
}

# configure_neutron() - Set config files, create data dirs, etc
function configure_neutron_new {
    sudo install -d -o $STACK_USER $NEUTRON_CONF_DIR

    (cd $NEUTRON_DIR && exec ./tools/generate_config_file_samples.sh)

    cp $NEUTRON_DIR/etc/neutron.conf.sample $NEUTRON_CONF

    configure_neutron_rootwrap

    mkdir -p $NEUTRON_CORE_PLUGIN_CONF_PATH

    # NOTE(yamamoto): A decomposed plugin should prepare the config file in
    # its devstack plugin.
    if [ -f $NEUTRON_DIR/etc/neutron/plugins/$NEUTRON_CORE_PLUGIN/$NEUTRON_CORE_PLUGIN_CONF_FILENAME.sample ]; then
        cp $NEUTRON_DIR/etc/neutron/plugins/$NEUTRON_CORE_PLUGIN/$NEUTRON_CORE_PLUGIN_CONF_FILENAME.sample $NEUTRON_CORE_PLUGIN_CONF
    fi

    iniset $NEUTRON_CONF database connection `database_connection_url neutron`
    iniset $NEUTRON_CONF DEFAULT state_path $NEUTRON_STATE_PATH
    iniset $NEUTRON_CONF oslo_concurrency lock_path $NEUTRON_STATE_PATH/lock
    iniset $NEUTRON_CONF DEFAULT use_syslog $SYSLOG

    iniset $NEUTRON_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL

    iniset_rpc_backend neutron $NEUTRON_CONF

    # Neutron API server & Neutron plugin
    if is_service_enabled neutron-api; then
        local policy_file=$NEUTRON_CONF_DIR/policy.json
        # Allow neutron user to administer neutron to match neutron account
        # NOTE(amotoki): This is required for nova works correctly with neutron.
        if [ -f $NEUTRON_DIR/etc/policy.json ]; then
            cp $NEUTRON_DIR/etc/policy.json $policy_file
            sed -i 's/"context_is_admin":  "role:admin"/"context_is_admin":  "role:admin or user_name:neutron"/g' $policy_file
        else
            echo '{"context_is_admin":  "role:admin or user_name:neutron"}' > $policy_file
        fi

        cp $NEUTRON_DIR/etc/api-paste.ini $NEUTRON_CONF_DIR/api-paste.ini

        iniset $NEUTRON_CONF DEFAULT core_plugin $NEUTRON_CORE_PLUGIN

        iniset $NEUTRON_CONF DEFAULT policy_file $policy_file
        iniset $NEUTRON_CONF DEFAULT allow_overlapping_ips True
        iniset $NEUTRON_CONF DEFAULT router_distributed $NEUTRON_DISTRIBUTED_ROUTING

        iniset $NEUTRON_CONF DEFAULT auth_strategy $NEUTRON_AUTH_STRATEGY
        configure_keystone_authtoken_middleware $NEUTRON_CONF neutron
        configure_keystone_authtoken_middleware $NEUTRON_CONF nova nova

        # Configure tenant network type
        iniset $NEUTRON_CORE_PLUGIN_CONF ml2 tenant_network_types $NEUTRON_TENANT_NETWORK_TYPE

        local mech_drivers="openvswitch"
        if [[ "$NEUTRON_DISTRIBUTED_ROUTING" = "True" ]]; then
            mech_drivers+=",l2population"
        else
            mech_drivers+=",linuxbridge"
        fi
        iniset $NEUTRON_CORE_PLUGIN_CONF ml2 mechanism_drivers $mech_drivers

        iniset $NEUTRON_CORE_PLUGIN_CONF ml2_type_vxlan vni_ranges 1001:2000
        iniset $NEUTRON_CORE_PLUGIN_CONF ml2_type_flat flat_networks $PUBLIC_NETWORK_NAME
        if [[ "$NEUTRON_TENANT_NETWORK_TYPE" =~ "vlan" ]] && [[ "$NEUTRON_PHYSICAL_NETWORK" != "" ]]; then
            iniset $NEUTRON_CORE_PLUGIN_CONF ml2_type_vlan network_vlan_ranges ${NEUTRON_PHYSICAL_NETWORK}:${NEUTRON_TENANT_VLAN_RANGE}
        fi
        if [[ "$NEUTRON_PORT_SECURITY" = "True" ]]; then
            neutron_ml2_extension_driver_add port_security
        fi
    fi

    # Neutron OVS or LB agent
    if is_service_enabled neutron-agent; then
        iniset $NEUTRON_CORE_PLUGIN_CONF agent tunnel_types vxlan
        iniset $NEUTRON_CORE_PLUGIN_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
        configure_root_helper_options $NEUTRON_CORE_PLUGIN_CONF

        # Configure the neutron agent
        if [[ $NEUTRON_AGENT == "linuxbridge" ]]; then
            iniset $NEUTRON_CORE_PLUGIN_CONF securitygroup firewall_driver iptables
            iniset $NEUTRON_CORE_PLUGIN_CONF vxlan local_ip $HOST_IP
        elif [[ $NEUTRON_AGENT == "openvswitch" ]]; then
            iniset $NEUTRON_CORE_PLUGIN_CONF securitygroup firewall_driver openvswitch
            iniset $NEUTRON_CORE_PLUGIN_CONF ovs local_ip $HOST_IP

            if [[ "$NEUTRON_DISTRIBUTED_ROUTING" = "True" ]]; then
                iniset $NEUTRON_CORE_PLUGIN_CONF agent l2_population True
                iniset $NEUTRON_CORE_PLUGIN_CONF agent enable_distributed_routing True
                iniset $NEUTRON_CORE_PLUGIN_CONF agent arp_responder True
            fi
        fi

        if ! running_in_container; then
            enable_kernel_bridge_firewall
        fi
    fi

    # DHCP Agent
    if is_service_enabled neutron-dhcp; then
        cp $NEUTRON_DIR/etc/dhcp_agent.ini.sample $NEUTRON_DHCP_CONF

        iniset $NEUTRON_DHCP_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
        # make it so we have working DNS from guests
        iniset $NEUTRON_DHCP_CONF DEFAULT dnsmasq_local_resolv True

        configure_root_helper_options $NEUTRON_DHCP_CONF
        iniset $NEUTRON_DHCP_CONF DEFAULT interface_driver $NEUTRON_AGENT
        neutron_plugin_configure_dhcp_agent $NEUTRON_DHCP_CONF
    fi

    if is_service_enabled neutron-l3; then
        cp $NEUTRON_DIR/etc/l3_agent.ini.sample $NEUTRON_L3_CONF
        iniset $NEUTRON_L3_CONF DEFAULT interface_driver $NEUTRON_AGENT
        neutron_service_plugin_class_add router
        configure_root_helper_options $NEUTRON_L3_CONF
        iniset $NEUTRON_L3_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
        neutron_plugin_configure_l3_agent $NEUTRON_L3_CONF

        # Configure the neutron agent to serve external network ports
        if [[ $NEUTRON_AGENT == "linuxbridge" ]]; then
            iniset $NEUTRON_CORE_PLUGIN_CONF linux_bridge bridge_mappings "$PUBLIC_NETWORK_NAME:$PUBLIC_BRIDGE"
        else
            iniset $NEUTRON_CORE_PLUGIN_CONF ovs bridge_mappings "$PUBLIC_NETWORK_NAME:$PUBLIC_BRIDGE"
        fi

        if [[ "$NEUTRON_DISTRIBUTED_ROUTING" = "True" ]]; then
            iniset $NEUTRON_L3_CONF DEFAULT agent_mode $NEUTRON_DVR_MODE
        fi
    fi

    # Metadata
    if is_service_enabled neutron-metadata-agent; then
        cp $NEUTRON_DIR/etc/metadata_agent.ini.sample $NEUTRON_META_CONF

        iniset $NEUTRON_META_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
        iniset $NEUTRON_META_CONF DEFAULT nova_metadata_host $NEUTRON_META_DATA_HOST
        iniset $NEUTRON_META_CONF DEFAULT metadata_workers $API_WORKERS
        # TODO(ihrachys) do we really need to set rootwrap for metadata agent?
        configure_root_helper_options $NEUTRON_META_CONF

        # TODO(dtroyer): remove the v2.0 hard code below
        iniset $NEUTRON_META_CONF DEFAULT auth_url $KEYSTONE_SERVICE_URI
        configure_keystone_authtoken_middleware $NEUTRON_META_CONF neutron DEFAULT
    fi

    # Format logging
    setup_logging $NEUTRON_CONF

    if is_service_enabled tls-proxy && [ "$NEUTRON_DEPLOY_MOD_WSGI" == "False" ]; then
        # Set the service port for a proxy to take the original
        iniset $NEUTRON_CONF DEFAULT bind_port "$NEUTRON_SERVICE_PORT_INT"
        iniset $NEUTRON_CONF oslo_middleware enable_proxy_headers_parsing True
    fi

    # Metering
    if is_service_enabled neutron-metering; then
        cp $NEUTRON_DIR/etc/metering_agent.ini.sample $NEUTRON_METERING_AGENT_CONF
        neutron_service_plugin_class_add metering
    fi
}

# configure_neutron_rootwrap() - configure Neutron's rootwrap
function configure_neutron_rootwrap {
    # Deploy new rootwrap filters files (owned by root).
    # Wipe any existing rootwrap.d files first
    if [[ -d $NEUTRON_CONF_DIR/rootwrap.d ]]; then
        sudo rm -rf $NEUTRON_CONF_DIR/rootwrap.d
    fi

    # Deploy filters to /etc/neutron/rootwrap.d
    sudo install -d -o root -g root -m 755 $NEUTRON_CONF_DIR/rootwrap.d
    sudo install -o root -g root -m 644 $NEUTRON_DIR/etc/neutron/rootwrap.d/*.filters $NEUTRON_CONF_DIR/rootwrap.d

    # Set up ``rootwrap.conf``, pointing to ``$NEUTRON_CONF_DIR/rootwrap.d``
    sudo install -o root -g root -m 644 $NEUTRON_DIR/etc/rootwrap.conf $NEUTRON_CONF_DIR
    sudo sed -e "s:^filters_path=.*$:filters_path=$NEUTRON_CONF_DIR/rootwrap.d:" -i $NEUTRON_CONF_DIR/rootwrap.conf

    # Set up the rootwrap sudoers for Neutron
    tempfile=`mktemp`
    echo "$STACK_USER ALL=(root) NOPASSWD: $NEUTRON_ROOTWRAP_CMD *" >$tempfile
    echo "$STACK_USER ALL=(root) NOPASSWD: $NEUTRON_ROOTWRAP_DAEMON_CMD" >>$tempfile
    chmod 0440 $tempfile
    sudo chown root:root $tempfile
    sudo mv $tempfile /etc/sudoers.d/neutron-rootwrap
}

# Make Neutron-required changes to nova.conf
# Takes a single optional argument which is the config file to update,
# if not passed $NOVA_CONF is used.
function configure_neutron_nova_new {
    local conf=${1:-$NOVA_CONF}
    iniset $conf neutron auth_type "password"
    iniset $conf neutron auth_url "$KEYSTONE_SERVICE_URI"
    iniset $conf neutron username neutron
    iniset $conf neutron password "$SERVICE_PASSWORD"
    iniset $conf neutron user_domain_name "Default"
    iniset $conf neutron project_name "$SERVICE_TENANT_NAME"
    iniset $conf neutron project_domain_name "Default"
    iniset $conf neutron auth_strategy $NEUTRON_AUTH_STRATEGY
    iniset $conf neutron region_name "$REGION_NAME"

    # optionally set options in nova_conf
    neutron_plugin_create_nova_conf $conf

    if is_service_enabled neutron-metadata-agent; then
        iniset $conf neutron service_metadata_proxy "True"
    fi

}

# Tenant               User       Roles
# ------------------------------------------------------------------
# service              neutron    admin        # if enabled

# create_neutron_accounts() - Create required service accounts
function create_neutron_accounts_new {
    local neutron_url

    if [ "$NEUTRON_DEPLOY_MOD_WSGI" == "True" ]; then
        neutron_url=$NEUTRON_SERVICE_PROTOCOL://$NEUTRON_SERVICE_HOST/networking/
    else
        neutron_url=$NEUTRON_SERVICE_PROTOCOL://$NEUTRON_SERVICE_HOST:$NEUTRON_SERVICE_PORT/
    fi


    if [[ "$ENABLED_SERVICES" =~ "neutron-api" ]]; then

        create_service_user "neutron"

        neutron_service=$(get_or_create_service "neutron" \
            "network" "Neutron Service")
        get_or_create_endpoint $neutron_service \
            "$REGION_NAME" "$neutron_url"
    fi
}

# init_neutron() - Initialize databases, etc.
function init_neutron_new {

    recreate_database neutron

    time_start "dbsync"
    # Run Neutron db migrations
    $NEUTRON_BIN_DIR/neutron-db-manage upgrade heads
    time_stop "dbsync"
}

# install_neutron() - Collect source and prepare
function install_neutron_new {
    git_clone $NEUTRON_REPO $NEUTRON_DIR $NEUTRON_BRANCH
    setup_develop $NEUTRON_DIR

    # Install neutron-lib from git so we make sure we're testing
    # the latest code.
    if use_library_from_git "neutron-lib"; then
        git_clone_by_name "neutron-lib"
        setup_dev_lib "neutron-lib"
    fi

    # L3 service requires radvd
    if is_service_enabled neutron-l3; then
        install_package radvd
    fi

    if is_service_enabled neutron-agent neutron-dhcp neutron-l3; then
        #TODO(sc68cal) - kind of ugly
        source $TOP_DIR/lib/neutron_plugins/${NEUTRON_AGENT}_agent
        neutron_plugin_install_agent_packages
    fi

}

# install_neutronclient() - Collect source and prepare
function install_neutronclient {
    if use_library_from_git "python-neutronclient"; then
        git_clone_by_name "python-neutronclient"
        setup_dev_lib "python-neutronclient"
        sudo install -D -m 0644 -o $STACK_USER {${GITDIR["python-neutronclient"]}/tools/,/etc/bash_completion.d/}neutron.bash_completion
    fi
}

# start_neutron_api() - Start the API process ahead of other things
function start_neutron_api {
    local service_port=$NEUTRON_SERVICE_PORT
    local service_protocol=$NEUTRON_SERVICE_PROTOCOL
    local neutron_url
    if is_service_enabled tls-proxy; then
        service_port=$NEUTRON_SERVICE_PORT_INT
        service_protocol="http"
    fi

    local opts=""
    opts+=" --config-file $NEUTRON_CONF"
    opts+=" --config-file $NEUTRON_CORE_PLUGIN_CONF"
    local cfg_file
    for cfg_file in ${_NEUTRON_SERVER_EXTRA_CONF_FILES_ABS[@]}; do
        opts+=" --config-file $cfg_file"
    done

    if [ "$NEUTRON_DEPLOY_MOD_WSGI" == "True" ]; then
        run_process neutron-api "$NEUTRON_BIN_DIR/uwsgi --procname-prefix neutron-api --ini $NEUTRON_UWSGI_CONF"
        neutron_url=$service_protocol://$NEUTRON_SERVICE_HOST/networking/
        enable_service neutron-rpc-server
        run_process neutron-rpc-server "$NEUTRON_BIN_DIR/neutron-rpc-server $opts"
    else
        # Start the Neutron service
        # TODO(sc68cal) Stop hard coding this
        run_process neutron-api "$NEUTRON_BIN_DIR/neutron-server $opts"
        neutron_url=$service_protocol://$NEUTRON_SERVICE_HOST:$service_port
        # Start proxy if enabled
        if is_service_enabled tls-proxy; then
            start_tls_proxy neutron '*' $NEUTRON_SERVICE_PORT $NEUTRON_SERVICE_HOST $NEUTRON_SERVICE_PORT_INT
        fi
    fi

    if ! wait_for_service $SERVICE_TIMEOUT $neutron_url; then
        die $LINENO "neutron-api did not start"
    fi
}

# start_neutron() - Start running processes
function start_neutron_new {
    # Start up the neutron agents if enabled
    # TODO(sc68cal) Make this pluggable so different DevStack plugins for different Neutron plugins
    # can resolve the $NEUTRON_AGENT_BINARY
    if is_service_enabled neutron-agent; then
        # TODO(ihrachys) stop loading ml2_conf.ini into agents, instead load agent specific files
        run_process neutron-agent "$NEUTRON_BIN_DIR/$NEUTRON_AGENT_BINARY --config-file $NEUTRON_CONF --config-file $NEUTRON_CORE_PLUGIN_CONF"
    fi
    if is_service_enabled neutron-dhcp; then
        neutron_plugin_configure_dhcp_agent $NEUTRON_DHCP_CONF
        run_process neutron-dhcp "$NEUTRON_BIN_DIR/$NEUTRON_DHCP_BINARY --config-file $NEUTRON_CONF --config-file $NEUTRON_DHCP_CONF"
    fi
    if is_service_enabled neutron-l3; then
        run_process neutron-l3 "$NEUTRON_BIN_DIR/$NEUTRON_L3_BINARY --config-file $NEUTRON_CONF --config-file $NEUTRON_L3_CONF"
    fi
    if is_service_enabled neutron-api && [[ "$NEUTRON_CREATE_INITIAL_NETWORKS" == "True" ]]; then
        # XXX(sc68cal) - Here's where plugins can wire up their own networks instead
        # of the code in lib/neutron_plugins/services/l3
        if type -p neutron_plugin_create_initial_networks > /dev/null; then
            neutron_plugin_create_initial_networks
        else
            # XXX(sc68cal) Load up the built in Neutron networking code and build a topology
            source $TOP_DIR/lib/neutron_plugins/services/l3
            # Create the networks using servic
            create_neutron_initial_network
        fi
    fi
    if is_service_enabled neutron-metadata-agent; then
        run_process neutron-metadata-agent "$NEUTRON_BIN_DIR/$NEUTRON_META_BINARY --config-file $NEUTRON_CONF --config-file $NEUTRON_META_CONF"
    fi

    if is_service_enabled neutron-metering; then
        run_process neutron-metering "$NEUTRON_BIN_DIR/$NEUTRON_METERING_BINARY --config-file $NEUTRON_CONF --config-file $NEUTRON_METERING_AGENT_CONF"
    fi
}

# stop_neutron() - Stop running processes
function stop_neutron_new {
    for serv in neutron-api neutron-agent neutron-l3; do
        stop_process $serv
    done

    if is_service_enabled neutron-rpc-server; then
        stop_process neutron-rpc-server
    fi

    if is_service_enabled neutron-dhcp; then
        stop_process neutron-dhcp
        pid=$(ps aux | awk '/[d]nsmasq.+interface=(tap|ns-)/ { print $2 }')
        [ ! -z "$pid" ] && sudo kill -9 $pid
    fi

    if is_service_enabled neutron-metadata-agent; then
        sudo pkill -9 -f neutron-ns-metadata-proxy || :
        stop_process neutron-metadata-agent
    fi
}

# neutron_service_plugin_class_add() - add service plugin class
function neutron_service_plugin_class_add_new {
    local service_plugin_class=$1
    local plugins=""

    plugins=$(iniget $NEUTRON_CONF DEFAULT service_plugins)
    if [ $plugins ]; then
        plugins+=","
    fi
    plugins+="${service_plugin_class}"
    iniset $NEUTRON_CONF DEFAULT service_plugins $plugins
}

function _neutron_ml2_extension_driver_add {
    local driver=$1
    local drivers=""

    drivers=$(iniget $NEUTRON_CORE_PLUGIN_CONF ml2 extension_drivers)
    if [ $drivers ]; then
        drivers+=","
    fi
    drivers+="${driver}"
    iniset $NEUTRON_CORE_PLUGIN_CONF ml2 extension_drivers $drivers
}

function neutron_server_config_add_new {
    _NEUTRON_SERVER_EXTRA_CONF_FILES_ABS+=($1)
}

# neutron_deploy_rootwrap_filters() - deploy rootwrap filters
function neutron_deploy_rootwrap_filters_new {
    local srcdir=$1
    sudo install -d -o root -g root -m 755 $NEUTRON_CONF_DIR/rootwrap.d
    sudo install -o root -g root -m 644 $srcdir/etc/neutron/rootwrap.d/*.filters $NEUTRON_CONF_DIR/rootwrap.d
}

# Dispatch functions
# These are needed for compatibility between the old and new implementations
# where there are function name overlaps.  These will be removed when
# neutron-legacy is removed.
# TODO(sc68cal) Remove when neutron-legacy is no more.
function cleanup_neutron {
    if [ "$NEUTRON_DEPLOY_MOD_WSGI" == "True" ]; then
        stop_process neutron-api
        stop_process neutron-rpc-server
        remove_uwsgi_config "$NEUTRON_UWSGI_CONF" "$NEUTRON_BIN_DIR/neutron-api"
        sudo rm -f $(apache_site_config_for neutron-api)
    fi

    if is_neutron_legacy_enabled; then
        # Call back to old function
        cleanup_mutnauq "$@"
    else
        cleanup_neutron_new "$@"
    fi
}

function configure_neutron {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        configure_mutnauq "$@"
    else
        configure_neutron_new "$@"
    fi

    if [ "$NEUTRON_DEPLOY_MOD_WSGI" == "True" ]; then
        write_uwsgi_config "$NEUTRON_UWSGI_CONF" "$NEUTRON_BIN_DIR/neutron-api" "/networking"
    fi
}

function configure_neutron_nova {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        create_nova_conf_neutron $NOVA_CONF
        if [[ "${CELLSV2_SETUP}" == "superconductor" ]]; then
            for i in $(seq 1 $NOVA_NUM_CELLS); do
                local conf
                conf=$(conductor_conf $i)
                create_nova_conf_neutron $conf
            done
        fi
    else
        configure_neutron_nova_new $NOVA_CONF
        if [[ "${CELLSV2_SETUP}" == "superconductor" ]]; then
            for i in $(seq 1 $NOVA_NUM_CELLS); do
                local conf
                conf=$(conductor_conf $i)
                configure_neutron_nova_new $conf
            done
        fi
    fi
}

function create_neutron_accounts {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        create_mutnauq_accounts "$@"
    else
        create_neutron_accounts_new "$@"
    fi
}

function init_neutron {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        init_mutnauq "$@"
    else
        init_neutron_new "$@"
    fi
}

function install_neutron {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        install_mutnauq "$@"
    else
        install_neutron_new "$@"
    fi
}

function neutron_service_plugin_class_add {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        _neutron_service_plugin_class_add "$@"
    else
        neutron_service_plugin_class_add_new "$@"
    fi
}

function neutron_ml2_extension_driver_add {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        _neutron_ml2_extension_driver_add_old "$@"
    else
        _neutron_ml2_extension_driver_add "$@"
    fi
}

function install_neutron_agent_packages {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        install_neutron_agent_packages_mutnauq "$@"
    else
        :
    fi
}

function neutron_server_config_add {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        mutnauq_server_config_add "$@"
    else
        neutron_server_config_add_new "$@"
    fi
}

function start_neutron {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        start_mutnauq_l2_agent "$@"
        start_mutnauq_other_agents "$@"
    else
        start_neutron_new "$@"
    fi
}

function stop_neutron {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        stop_mutnauq "$@"
    else
        stop_neutron_new "$@"
    fi
}

function neutron_deploy_rootwrap_filters {
    if is_neutron_legacy_enabled; then
        # Call back to old function
        _neutron_deploy_rootwrap_filters "$@"
    else
        neutron_deploy_rootwrap_filters_new "$@"
    fi
}

# Restore xtrace
$XTRACE