DEPRECATED, Neutron integration with OVN
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#!/bin/bash
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
# devstack/plugin.sh
# Functions to control the configuration and operation of the OVN service
# Dependencies:
#
# ``functions`` file
# ``DEST`` must be defined
# ``STACK_USER`` must be defined
# ``stack.sh`` calls the entry points in this order:
#
# - install_ovn
# - configure_ovn
# - configure_ovn_plugin
# - init_ovn
# - start_ovn
# - stop_ovn
# - cleanup_ovn
# Save trace setting
XTRACE=$(set +o | grep xtrace)
set +o xtrace
# Libraries that could be installed from source
GITREPO["ovsdbapp"]=${OVSDBAPP_REPO:-${GIT_BASE}/openstack/ovsdbapp.git}
GITBRANCH["ovsdbapp"]=${OVSDBAPP_BRANCH:-master}
GITDIR["ovsdbapp"]=$DEST/ovsdbapp
# Defaults
# --------
# The git repo to use
OVN_REPO=${OVN_REPO:-https://github.com/openvswitch/ovs.git}
OVN_REPO_NAME=$(basename ${OVN_REPO} | cut -f1 -d'.')
# The project directory
NETWORKING_OVN_DIR=$DEST/networking-ovn
# The branch to use from $OVN_REPO
OVN_BRANCH=${OVN_BRANCH:-master}
# How to connect to ovsdb-server hosting the OVN SB database.
OVN_SB_REMOTE=${OVN_SB_REMOTE:-tcp:$SERVICE_HOST:6642}
# How to connect to ovsdb-server hosting the OVN NB database
OVN_NB_REMOTE=${OVN_NB_REMOTE:-tcp:$SERVICE_HOST:6641}
# A UUID to uniquely identify this system. If one is not specified, a random
# one will be generated. A randomly generated UUID will be saved in a file
# 'ovn-uuid' so that the same one will be re-used if you re-run DevStack.
OVN_UUID=${OVN_UUID:-}
# Whether or not to build the openvswitch kernel module from ovs. This is required
# unless the distro kernel includes ovs+conntrack support.
OVN_BUILD_MODULES=$(trueorfalse True OVN_BUILD_MODULES)
# Whether or not to install the ovs python module from ovs source. This can be
# used to test and validate new ovs python features. This should only be used
# for development purposes since the ovs python version is controlled by OpenStack
# requirements.
OVN_INSTALL_OVS_PYTHON_MODULE=$(trueorfalse False OVN_INSTALL_OVS_PYTHON_MODULE)
# GENEVE overlay protocol overhead. Defaults to 38 bytes plus the IP version
# overhead (20 bytes for IPv4 (default) or 40 bytes for IPv6) which is determined
# based on the ML2 overlay_ip_version option. The ML2 framework will use this to
# configure the MTU DHCP option.
OVN_GENEVE_OVERHEAD=${OVN_GENEVE_OVERHEAD:-38}
# This sets whether to create a public network and bridge.
# If set to True, a public network and subnet(s) will be created, and a router
# will be created to route the default private network to the public one.
OVN_L3_CREATE_PUBLIC_NETWORK=$(trueorfalse False OVN_L3_CREATE_PUBLIC_NETWORK)
# ml2/config for neutron_sync_mode
OVN_NEUTRON_SYNC_MODE=${OVN_NEUTRON_SYNC_MODE:-log}
# The type of OVN L3 Scheduler to use. The OVN L3 Scheduler determines the
# hypervisor/chassis where a routers gateway should be hosted in OVN. The
# default OVN L3 scheduler is leastloaded
OVN_L3_SCHEDULER=${OVN_L3_SCHEDULER:-leastloaded}
# Neutron directory
NEUTRON_DIR=$DEST/neutron
OVN_META_CONF=$NEUTRON_CONF_DIR/networking_ovn_metadata_agent.ini
# Set variables for building OVS from source
OVS_REPO=$OVN_REPO
OVS_REPO_NAME=$OVN_REPO_NAME
OVS_BRANCH=$OVN_BRANCH
NETWORKING_OVN_BIN_DIR=$(get_python_exec_prefix)
NETWORKING_OVN_METADATA_BINARY="networking-ovn-metadata-agent"
# Utility Functions
# -----------------
# There are some ovs functions OVN depends on that must be sourced from
# the ovs neutron plugins. After doing this, the OVN overrides must be
# re-sourced.
source $TOP_DIR/lib/neutron_plugins/ovs_base
source $TOP_DIR/lib/neutron_plugins/openvswitch_agent
source $NETWORKING_OVN_DIR/devstack/override-defaults
source $NETWORKING_OVN_DIR/devstack/network_utils.sh
function is_ovn_service_enabled {
ovn_service=$1
is_service_enabled ovn && return 0
is_service_enabled $ovn_service && return 0
return 1
}
# NOTE(rtheis): Function copied from DevStack _neutron_ovs_base_setup_bridge
# and _neutron_ovs_base_add_bridge with the call to neutron-ovs-cleanup
# removed. The call is not relevant for OVN, as it is specific to the use
# of Neutron's OVS agent and hangs when running stack.sh because
# neutron-ovs-cleanup uses the OVSDB native interface.
function ovn_base_setup_bridge {
local bridge=$1
local addbr_cmd="sudo ovs-vsctl --no-wait -- --may-exist add-br $bridge"
if [ "$OVS_DATAPATH_TYPE" != "system" ] ; then
addbr_cmd="$addbr_cmd -- set Bridge $bridge datapath_type=${OVS_DATAPATH_TYPE}"
fi
$addbr_cmd
sudo ovs-vsctl --no-wait br-set-external-id $bridge bridge-id $bridge
}
# Entry Points
# ------------
# cleanup_ovn() - Remove residual data files, anything left over from previous
# runs that a clean run would need to clean up
function cleanup_ovn {
local _pwd=$(pwd)
cd $DEST/$OVN_REPO_NAME
sudo make uninstall
sudo make distclean
cd $_pwd
}
# configure_ovn() - Set config files, create data dirs, etc
function configure_ovn {
echo "Configuring OVN"
if [ -z "$OVN_UUID" ] ; then
if [ -f ./ovn-uuid ] ; then
OVN_UUID=$(cat ovn-uuid)
else
OVN_UUID=$(uuidgen)
echo $OVN_UUID > ovn-uuid
fi
fi
# Metadata
if is_service_enabled networking-ovn-metadata-agent; then
sudo install -d -o $STACK_USER $NEUTRON_CONF_DIR
configure_neutron_rootwrap
mkdir -p $NETWORKING_OVN_DIR/etc/neutron/plugins/ml2
(cd $NETWORKING_OVN_DIR && exec ./tools/generate_config_file_samples.sh)
cp $NETWORKING_OVN_DIR/etc/networking_ovn_metadata_agent.ini.sample $OVN_META_CONF
iniset $OVN_META_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL
iniset $OVN_META_CONF DEFAULT nova_metadata_ip $SERVICE_HOST
iniset $OVN_META_CONF DEFAULT metadata_workers $API_WORKERS
iniset $OVN_META_CONF DEFAULT state_path $NEUTRON_STATE_PATH
iniset $OVN_META_CONF agent root_helper_daemon "$NEUTRON_ROOTWRAP_DAEMON_CMD"
iniset $OVN_META_CONF ovs ovsdb_connection unix:/usr/local/var/run/openvswitch/db.sock
iniset $OVN_META_CONF ovn ovn_sb_connection $OVN_SB_REMOTE
fi
}
function configure_ovn_plugin {
echo "Configuring Neutron for OVN"
if is_service_enabled q-svc ; then
# NOTE(arosen) needed for tempest
export NETWORK_API_EXTENSIONS=$(python -c \
'from networking_ovn.common import extensions ;\
print ",".join(extensions.ML2_SUPPORTED_API_EXTENSIONS)')
export NETWORK_API_EXTENSIONS=$NETWORK_API_EXTENSIONS,$(python -c \
'from networking_ovn.common import extensions ;\
print ",".join(extensions.ML2_SUPPORTED_API_EXTENSIONS_OVN_L3)')
populate_ml2_config /$Q_PLUGIN_CONF_FILE ml2_type_geneve max_header_size=$OVN_GENEVE_OVERHEAD
populate_ml2_config /$Q_PLUGIN_CONF_FILE ovn ovn_nb_connection="$OVN_NB_REMOTE"
populate_ml2_config /$Q_PLUGIN_CONF_FILE ovn ovn_sb_connection="$OVN_SB_REMOTE"
populate_ml2_config /$Q_PLUGIN_CONF_FILE ovn neutron_sync_mode="$OVN_NEUTRON_SYNC_MODE"
populate_ml2_config /$Q_PLUGIN_CONF_FILE ovn ovn_l3_scheduler="$OVN_L3_SCHEDULER"
populate_ml2_config /$Q_PLUGIN_CONF_FILE securitygroup enable_security_group="$Q_USE_SECGROUP"
inicomment /$Q_PLUGIN_CONF_FILE securitygroup firewall_driver
if is_service_enabled networking-ovn-metadata-agent; then
populate_ml2_config /$Q_PLUGIN_CONF_FILE ovn ovn_metadata_enabled=True
else
populate_ml2_config /$Q_PLUGIN_CONF_FILE ovn ovn_metadata_enabled=False
fi
fi
if is_service_enabled q-dhcp ; then
die $LINENO "The q-dhcp service must be disabled with OVN."
fi
if is_service_enabled q-l3 ; then
die $LINENO "The q-l3 service must be disabled with OVN."
fi
# NOTE(rtheis): OVN currently lacks support for metadata so enabling
# config drive is required to provide metadata to instances.
if is_service_enabled n-api-meta ; then
if is_service_enabled networking-ovn-metadata-agent ; then
iniset $NOVA_CONF neutron service_metadata_proxy True
else
iniset $NOVA_CONF DEFAULT force_config_drive True
fi
fi
}
# init_ovn() - Initialize databases, etc.
function init_ovn {
# clean up from previous (possibly aborted) runs
# create required data files
# Assumption: this is a dedicated test system and there is nothing important
# in the ovn, ovn-nb, or ovs databases. We're going to trash them and
# create new ones on each devstack run.
base_dir=$DATA_DIR/ovs
mkdir -p $base_dir
for db in conf.db ovnsb.db ovnnb.db vtep.db ; do
if [ -f $base_dir/$db ] ; then
rm -f $base_dir/$db
fi
done
rm -f $base_dir/.*.db.~lock~
echo "Creating OVS, OVN-Southbound and OVN-Northbound Databases"
ovsdb-tool create $base_dir/conf.db $DEST/$OVN_REPO_NAME/vswitchd/vswitch.ovsschema
if is_ovn_service_enabled ovn-northd ; then
ovsdb-tool create $base_dir/ovnsb.db $DEST/$OVN_REPO_NAME/ovn/ovn-sb.ovsschema
ovsdb-tool create $base_dir/ovnnb.db $DEST/$OVN_REPO_NAME/ovn/ovn-nb.ovsschema
fi
if is_ovn_service_enabled ovn-controller-vtep ; then
ovsdb-tool create $base_dir/vtep.db $DEST/$OVN_REPO_NAME/vtep/vtep.ovsschema
fi
}
# install_ovn() - Collect source and prepare
function install_ovn {
echo "Installing OVN and dependent packages"
# If OVS is already installed, remove it, because we're about to re-install
# it from source.
for package in openvswitch openvswitch-switch openvswitch-common; do
if is_package_installed $package ; then
uninstall_package $package
fi
done
if ! is_neutron_enabled ; then
# NOTE(rtheis): networking-ovn depends on neutron, so ensure it at
# least gets installed and its configuration directory exists (which
# is needed by the multinode job).
install_neutron
sudo install -d -o $STACK_USER $NEUTRON_CONF_DIR
fi
# Install tox, used to generate the config (see devstack/override-defaults)
pip_install tox
source $NEUTRON_DIR/devstack/lib/ovs
compile_ovs $OVN_BUILD_MODULES
sudo mkdir -p /usr/local/var/run/openvswitch
sudo mkdir -p /usr/local/var/log/openvswitch
sudo chown $(whoami) /usr/local/var/run/openvswitch
sudo chown $(whoami) /usr/local/var/log/openvswitch
# Install ovsdbapp from source if requested
if use_library_from_git "ovsdbapp"; then
git_clone_by_name "ovsdbapp"
setup_dev_lib "ovsdbapp"
fi
setup_develop $DEST/networking-ovn
# Install ovs python module from ovs source.
if [[ "$OVN_INSTALL_OVS_PYTHON_MODULE" == "True" ]]; then
sudo pip uninstall -y ovs
sudo pip install -e $DEST/$OVS_REPO_NAME/python
fi
}
function start_ovs {
echo "Starting OVS"
local _pwd=$(pwd)
local ovsdb_logfile="ovsdb-server.log.${CURRENT_LOG_TIME}"
bash -c "cd '$LOGDIR' && touch '$ovsdb_logfile' && ln -sf '$ovsdb_logfile' ovsdb-server.log"
local ovsdb_nb_logfile="ovsdb-server-nb.log.${CURRENT_LOG_TIME}"
bash -c "cd '$LOGDIR' && touch '$ovsdb_nb_logfile' && ln -sf '$ovsdb_nb_logfile' ovsdb-server-nb.log"
local ovsdb_sb_logfile="ovsdb-server-sb.log.${CURRENT_LOG_TIME}"
bash -c "cd '$LOGDIR' && touch '$ovsdb_sb_logfile' && ln -sf '$ovsdb_sb_logfile' ovsdb-server-sb.log"
cd $DATA_DIR/ovs
EXTRA_DBS=""
OVSDB_SB_REMOTE=""
if is_ovn_service_enabled ovn-northd ; then
# TODO (regXboi): change ovn-ctl so that we can use something
# other than --db-nb-port for port and ip address
DB_NB_PORT="6641"
DB_NB_INSECURE_REMOTE="yes"
DB_NB_FILE="$DATA_DIR/ovs/ovnnb.db"
OVN_NB_LOGFILE="$LOGDIR/ovsdb-server-nb.log"
# TODO (regXboi): change ovn-ctl so that we can use something
# other than --db-sb-port for port and ip address
DB_SB_PORT="6642"
DB_SB_INSECURE_REMOTE="yes"
DB_SB_FILE="$DATA_DIR/ovs/ovnsb.db"
OVN_SB_LOGFILE="$LOGDIR/ovsdb-server-sb.log"
/usr/local/share/openvswitch/scripts/ovn-ctl start_ovsdb \
--db-nb-create-insecure-remote=$DB_NB_INSECURE_REMOTE \
--db-sb-create-insecure-remote=$DB_SB_INSECURE_REMOTE \
--db-nb-port=$DB_NB_PORT --db-sb-port=$DB_SB_PORT \
--db-nb-file=$DB_NB_FILE --ovn-nb-logfile=$OVN_NB_LOGFILE \
--db-sb-file=$DB_SB_FILE --ovn-sb-logfile=$OVN_SB_LOGFILE
echo "Waiting for ovn ovsdb servers to start ... "
DB_NB_SOCK="/usr/local/var/run/openvswitch/ovnnb_db.sock"
DB_SB_SOCK="/usr/local/var/run/openvswitch/ovnsb_db.sock"
local testcmd="test -e $DB_NB_SOCK -a -e $DB_SB_SOCK"
test_with_retry "$testcmd" "nb ovsdb-server did not start" $SERVICE_TIMEOUT 1
echo "done."
fi
# TODO (regXboi): it would be nice to run the following with run_process
# and have it end up under the control of screen. However, at the point
# this is called, screen isn't running, so we'd have to overload
# USE_SCREEN to get the process to start, but testing shows that the
# resulting process doesn't want to create br-int, which leaves things
# rather broken. So, stay with this for now and somebody more tenacious
# than I can figure out how to make it work...
if is_ovn_service_enabled ovn-controller || is_ovn_service_enabled ovn-controller-vtep ; then
local _OVSREMOTE="--remote=db:Open_vSwitch,Open_vSwitch,manager_options"
local _VTEPREMOTE=""
local _OVSDB=conf.db
local _VTEPDB=""
if is_ovn_service_enabled ovn-controller-vtep ; then
_VTEPREMOTE="--remote=db:hardware_vtep,Global,managers"
_VTEPDB=vtep.db
fi
ovsdb-server --remote=punix:/usr/local/var/run/openvswitch/db.sock \
$_OVSREMOTE $_VTEPREMOTE \
--pidfile --detach -vconsole:off \
--log-file=$LOGDIR/ovsdb-server.log \
$_OVSDB $_VTEPDB
echo -n "Waiting for ovsdb-server to start ... "
local testcmd="test -e /usr/local/var/run/openvswitch/db.sock"
test_with_retry "$testcmd" "ovsdb-server did not start" $SERVICE_TIMEOUT 1
echo "done."
ovs-vsctl --no-wait init
ovs-vsctl --no-wait set open_vswitch . system-type="devstack"
ovs-vsctl --no-wait set open_vswitch . external-ids:system-id="$OVN_UUID"
fi
if is_ovn_service_enabled ovn-controller || is_ovn_service_enabled ovn-controller-vtep ; then
ovs-vsctl --no-wait set open_vswitch . external-ids:ovn-remote="$OVN_SB_REMOTE"
ovs-vsctl --no-wait set open_vswitch . external-ids:ovn-bridge="br-int"
ovs-vsctl --no-wait set open_vswitch . external-ids:ovn-encap-type="geneve,vxlan"
ovs-vsctl --no-wait set open_vswitch . external-ids:ovn-encap-ip="$HOST_IP"
ovn_base_setup_bridge br-int
ovs-vsctl --no-wait set bridge br-int fail-mode=secure other-config:disable-in-band=true
local ovswd_logfile="ovs-switchd.log.${CURRENT_LOG_TIME}"
bash -c "cd '$LOGDIR' && touch '$ovswd_logfile' && ln -sf '$ovswd_logfile' ovs-vswitchd.log"
# Bump up the max number of open files ovs-vswitchd can have
sudo sh -c "ulimit -n 32000 && exec ovs-vswitchd --pidfile --detach -vconsole:off --log-file=$LOGDIR/ovs-vswitchd.log"
if is_provider_network || [[ $Q_USE_PROVIDERNET_FOR_PUBLIC == "True" ]]; then
ovn_base_setup_bridge $OVS_PHYSICAL_BRIDGE
ovs-vsctl set open . external-ids:ovn-bridge-mappings=${PHYSICAL_NETWORK}:${OVS_PHYSICAL_BRIDGE}
fi
fi
if is_ovn_service_enabled ovn-controller-vtep ; then
ovn_base_setup_bridge br-vtep
vtep-ctl add-ps br-vtep
vtep-ctl set Physical_Switch br-vtep tunnel_ips=$HOST_IP
sudo /usr/local/share/openvswitch/scripts/ovs-vtep --log-file=$LOGDIR/ovs-vtep.log --pidfile --detach br-vtep
vtep-ctl set-manager tcp:$HOST_IP:6640
fi
cd $_pwd
}
# start_ovn() - Start running processes, including screen
function start_ovn {
echo "Starting OVN"
if is_ovn_service_enabled ovn-controller ; then
# (regXboi) pulling out --log-file to avoid double logging
# appears to break devstack, so let's not do that
run_process ovn-controller "/usr/local/bin/ovn-controller --pidfile --log-file unix:/usr/local/var/run/openvswitch/db.sock" root root
# This makes sure that the console logs have time stamps to
# the millisecond, but we need to make sure ovs-appctl has
# a pid file to work with, so ...
echo -n "Waiting for ovn-controller to start ... "
local testcmd="test -e /usr/local/var/run/openvswitch/ovn-controller.pid"
test_with_retry "$testcmd" "ovn-controller did not start" $SERVICE_TIMEOUT 1
echo "done."
sudo ovs-appctl -t ovn-controller vlog/set "PATTERN:CONSOLE:%D{%Y-%m-%dT%H:%M:%S.###Z}|%05N|%c%T|%p|%m"
fi
if is_ovn_service_enabled ovn-controller-vtep ; then
# (regXboi) pulling out --log-file to avoid double logging
# appears to break devstack, so let's not do that
run_process ovn-controller-vtep "/usr/local/bin/ovn-controller-vtep --pidfile --log-file --vtep-db=unix:/usr/local/var/run/openvswitch/db.sock --ovnsb-db=$OVN_SB_REMOTE" root root
# This makes sure that the console logs have time stamps to
# the millisecond, but we need to make sure ovs-appctl has
# a pid file to work with, so ...
echo -n "Waiting for ovn-controller-vtep to start ... "
local testcmd="test -e /usr/local/var/run/openvswitch/ovn-controller-vtep.pid"
test_with_retry "$testcmd" "ovn-controller-vtep did not start" $SERVICE_TIMEOUT 1
echo "done."
sudo ovs-appctl -t ovn-controller-vtep vlog/set "PATTERN:CONSOLE:%D{%Y-%m-%dT%H:%M:%S.###Z}|%05N|%c%T|%p|%m"
fi
if is_ovn_service_enabled ovn-northd ; then
run_process ovn-northd "/usr/local/bin/ovn-northd --log-file=$LOGDIR/ovn-northd.log --pidfile"
# This makes sure that the console logs have time stamps to
# the millisecond, but we need to make sure ovs-appctl has
# a pid file to work with, so ...
echo -n "Waiting for ovn-northd to start ... "
OVN_NORTHD_PID="/usr/local/var/run/openvswitch/ovn-northd.pid"
local testcmd="test -e $OVN_NORTHD_PID"
test_with_retry "$testcmd" "ovn-northd did not start" $SERVICE_TIMEOUT 1
echo "done."
sudo ovs-appctl -t ovn-northd vlog/set "PATTERN:CONSOLE:%D{%Y-%m-%dT%H:%M:%S.###Z}|%05N|%c%T|%p|%m"
fi
if is_service_enabled networking-ovn-metadata-agent; then
run_process networking-ovn-metadata-agent "$NETWORKING_OVN_BIN_DIR/$NETWORKING_OVN_METADATA_BINARY --config-file $OVN_META_CONF"
fi
}
# stop_ovn() - Stop running processes (non-screen)
function stop_ovn {
if is_ovn_service_enabled ovn-controller ; then
stop_process ovn-controller
sudo killall ovs-vswitchd
fi
if is_ovn_service_enabled ovn-controller-vtep ; then
stop_process ovn-controller-vtep
sudo killall ovs-vtep
sudo killall ovs-vswitchd
fi
if is_ovn_service_enabled ovn-northd ; then
/usr/local/share/openvswitch/scripts/ovn-ctl stop_northd
fi
sudo killall ovsdb-server
if is_service_enabled networking-ovn-metadata-agent; then
sudo pkill -9 -f haproxy || :
stop_process networking-ovn-metadata-agent
fi
}
# stop_ovs_dp() - Stop OVS datapath
function stop_ovs_dp {
sudo ovs-dpctl dump-dps | sudo xargs -n1 ovs-dpctl del-dp
sudo rmmod vport_geneve
sudo rmmod openvswitch
}
function disable_libvirt_apparmor {
if ! sudo aa-status --enabled ; then
return 0
fi
# NOTE(arosen): This is used as a work around to allow newer versions
# of libvirt to work with ovs configured ports. See LP#1466631.
# requires the apparmor-utils
install_package apparmor-utils
# disables apparmor for libvirtd
sudo aa-complain /etc/apparmor.d/usr.sbin.libvirtd
}
function create_public_bridge {
# Create the public bridge that OVN will use
# This logic is based on the devstack neutron-legacy _neutron_configure_router_v4 and _v6
local ext_gw_ifc
ext_gw_ifc=$(get_ext_gw_interface)
sudo ovs-vsctl --may-exist add-br $ext_gw_ifc -- set bridge $ext_gw_ifc protocols=OpenFlow13
sudo ovs-vsctl set open . external-ids:ovn-bridge-mappings=$PHYSICAL_NETWORK:$ext_gw_ifc
if [ -n "$FLOATING_RANGE" ]; then
local cidr_len=${FLOATING_RANGE#*/}
sudo ip addr add $PUBLIC_NETWORK_GATEWAY/$cidr_len dev $ext_gw_ifc
fi
# Ensure IPv6 RAs are accepted on the interface with the default route.
# This is needed for neutron-based devstack clouds to work in
# IPv6-only clouds in the gate. Please do not remove this without
# talking to folks in Infra. This fix is based on a devstack fix for
# neutron L3 agent: https://review.openstack.org/#/c/359490/.
default_route_dev=$(ip route | grep ^default | awk '{print $5}')
sudo sysctl -w net.ipv6.conf.$default_route_dev.accept_ra=2
sudo sysctl -w net.ipv6.conf.all.forwarding=1
if [ -n "$IPV6_PUBLIC_RANGE" ]; then
local ipv6_cidr_len=${IPV6_PUBLIC_RANGE#*/}
sudo ip -6 addr add $IPV6_PUBLIC_NETWORK_GATEWAY/$ipv6_cidr_len dev $ext_gw_ifc
# NOTE(numans): Commenting the below code for now as this is breaking
# the CI after xenial upgrade.
# https://bugs.launchpad.net/networking-ovn/+bug/1648670
# sudo ip -6 route replace $FIXED_RANGE_V6 via $IPV6_PUBLIC_NETWORK_GATEWAY dev $ext_gw_ifc
fi
sudo ip link set $ext_gw_ifc up
}