Create a new version of paste:

# Install python pip
sudo apt install python-pip
# Eventually create a virtualenv
sudo apt install python3-virtualenv
virtualenv octavia_disk_image_create
source octavia_disk_image_create/bin/activate
# Install octavia requirements
git clone https://opendev.org/openstack/octavia.git
cd octavia/diskimage-create/
pip install -r requirements.txt

sudo apt install qemu-utils git kpartx debootstrap
sudo chmod 0644 /boot/vmlinuz*

bash diskimage-create.sh -g stable/train
Successfully built the amphora using the stable/train amphora-agent.
Amphora image size: /home/sytel/octavia/diskimage-create/amphora-x64-haproxy.qcow2 395847168


openstack image create --disk-format qcow2 \
   --container-format bare --tag octavia-amphora-image --file /home/sytel/octavia/diskimage-create/amphora-x64-haproxy.qcow2 \
   --public --project admin amphora-x64-haproxy


# create db
mysql -u root -p
CREATE DATABASE octavia;
CREATE USER 'octavia'@'localhost' IDENTIFIED BY 'octavia';
GRANT ALL PRIVILEGES ON *.* TO 'octavia'@'localhost' with grant option;
CREATE USER 'octavia'@'%' IDENTIFIED BY 'octavia';
GRANT ALL PRIVILEGES ON *.* TO 'octavia'@'%' with grant option;
\q

openstack user create --domain default --password-prompt octavia
> octavia
> octavia


openstack role add --user octavia --project admin admin
openstack role add --project service --user octavia admin
openstack service create --name octavia --description "OpenStack Octavia" load-balancer

openstack endpoint create --region RegionOne \
  load-balancer public http://192.168.122.124:9876
openstack endpoint create --region RegionOne \
  load-balancer internal http://192.168.122.124:9876
openstack endpoint create --region RegionOne \
  load-balancer admin http://192.168.122.124:9876 
  
cat << EOF >> $HOME/octavia-openrc
export OS_PROJECT_DOMAIN_NAME=Default
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_NAME=service
export OS_USERNAME=octavia
export OS_PASSWORD=octavia
export OS_AUTH_URL=http://192.168.122.124:5000
export OS_IDENTITY_API_VERSION=3
export OS_IMAGE_API_VERSION=2
export OS_VOLUME_API_VERSION=3
EOF 

. $HOME/octavia-openrc

## build image now


openstack flavor create --id 200 --vcpus 1 --ram 1024 \
  --disk 2 "amphora" --private

sudo apt install octavia-api octavia-health-manager octavia-housekeeping \
  octavia-worker python3-octavia python3-octaviaclient
# If octavia-common and octavia-api packages ask you to configure, choose No.


git clone https://opendev.org/openstack/octavia.git
cd octavia/bin/
source create_dual_intermediate_CA.sh
sudo mkdir -p /etc/octavia/certs/private
sudo chmod 755 /etc/octavia -R
sudo cp -p etc/octavia/certs/server_ca.cert.pem /etc/octavia/certs
sudo cp -p etc/octavia/certs/server_ca-chain.cert.pem /etc/octavia/certs
sudo cp -p etc/octavia/certs/server_ca.key.pem /etc/octavia/certs/private
sudo cp -p etc/octavia/certs/client_ca.cert.pem /etc/octavia/certs
sudo cp -p etc/octavia/certs/client.cert-and-key.pem /etc/octavia/certs/private

cd
. octavia-openrc
openstack security group create lb-mgmt-sec-grp
openstack security group rule create --protocol icmp lb-mgmt-sec-grp
openstack security group rule create --protocol tcp --dst-port 22 lb-mgmt-sec-grp
openstack security group rule create --protocol tcp --dst-port 9443 lb-mgmt-sec-grp
openstack security group create lb-health-mgr-sec-grp
openstack security group rule create --protocol udp --dst-port 5555 lb-health-mgr-sec-grp


cd $HOME
sudo mkdir -m755 -p /etc/dhcp/octavia
sudo cp octavia/etc/dhcp/dhclient.conf /etc/dhcp/octavia

# network setup
OCTAVIA_MGMT_SUBNET=172.16.0.0/12
OCTAVIA_MGMT_SUBNET_START=172.16.0.100
OCTAVIA_MGMT_SUBNET_END=172.16.31.254
OCTAVIA_MGMT_PORT_IP=172.16.0.2

openstack network create lb-mgmt-net
openstack subnet create --subnet-range $OCTAVIA_MGMT_SUBNET --allocation-pool \
  start=$OCTAVIA_MGMT_SUBNET_START,end=$OCTAVIA_MGMT_SUBNET_END \
  --network lb-mgmt-net lb-mgmt-subnet

SUBNET_ID=$(openstack subnet show lb-mgmt-subnet -f value -c id)
PORT_FIXED_IP="--fixed-ip subnet=$SUBNET_ID,ip-address=$OCTAVIA_MGMT_PORT_IP"
MGMT_PORT_ID=$(openstack port create --security-group \
  lb-health-mgr-sec-grp --device-owner Octavia:health-mgr \
  --host=$(hostname) -c id -f value --network lb-mgmt-net \
  $PORT_FIXED_IP octavia-health-manager-listen-port)
MGMT_PORT_MAC=$(openstack port show -c mac_address -f value \
  $MGMT_PORT_ID)

sudo ip link add o-hm0 type veth peer name o-bhm0
NETID=$(openstack network show lb-mgmt-net -c id -f value)
BRNAME=brq$(echo $NETID|cut -c 1-11)
sudo brctl addif $BRNAME o-bhm0
sudo ip link set o-bhm0 up

sudo ip link set dev o-hm0 address $MGMT_PORT_MAC
sudo iptables -I INPUT -i o-hm0 -p udp --dport 5555 -j ACCEPT
sudo dhclient -v o-hm0 -cf /etc/dhcp/octavia

sudo vi /etc/systemd/network/o-hm0.network

[Match]
Name=o-hm0

[Network]
DHCP=yes


sudo vi /etc/systemd/system/octavia-interface.service

[Unit]
Description=Octavia Interface Creator
Requires=neutron-linuxbridge-agent.service
After=neutron-linuxbridge-agent.service

[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/opt/octavia-interface.sh start
ExecStop=/opt/octavia-interface.sh stop

[Install]
WantedBy=multi-user.target


# You need to substitute $MGMT_PORT_MAC and $BRNAME for the values in your environment.
sudo vi /opt/octavia-interface.sh
#!/bin/bash

set -ex

MAC=fa:16:3e:ef:cc:32
BRNAME=brqa90c6329-88

if [ "$1" == "start" ]; then
  ip link add o-hm0 type veth peer name o-bhm0
  brctl addif $BRNAME o-bhm0
  ip link set o-bhm0 up
  ip link set dev o-hm0 address $MAC
  ip link set o-hm0 up
  iptables -I INPUT -i o-hm0 -p udp --dport 5555 -j ACCEPT
elif [ "$1" == "stop" ]; then
  ip link del o-hm0
else
  brctl show $BRNAME
  ip a s dev o-hm0
fi