Configure Load-Balancer Version 2¶

Phase 1: Create DevStack + 2 nova instances¶

First, set up a vm of your choice with at least 8 GB RAM and 16 GB disk space, make sure it is updated. Install git and any other developer tools you find useful.

Install devstack

git clone https://git.openstack.org/openstack-dev/devstack
cd devstack

Edit your local.conf to look like

[[local|localrc]]
# Load the external LBaaS plugin.
enable_plugin neutron-lbaas https://git.openstack.org/openstack/neutron-lbaas
enable_plugin octavia https://git.openstack.org/openstack/octavia

# ===== BEGIN localrc =====
DATABASE_PASSWORD=password
ADMIN_PASSWORD=password
SERVICE_PASSWORD=password
RABBIT_PASSWORD=password
# Enable Logging
LOGFILE=$DEST/logs/stack.sh.log
VERBOSE=True
LOG_COLOR=True
# Pre-requisite
ENABLED_SERVICES=rabbit,mysql,key
# Horizon
ENABLED_SERVICES+=,horizon
# Nova
ENABLED_SERVICES+=,n-api,n-cpu,n-cond,n-sch
# Glance
ENABLED_SERVICES+=,g-api,g-reg
# Neutron
ENABLED_SERVICES+=,q-svc,q-agt,q-dhcp,q-l3,q-meta
# Enable LBaaS v2
ENABLED_SERVICES+=,q-lbaasv2
ENABLED_SERVICES+=,octavia,o-cw,o-hk,o-hm,o-api
# Cinder
ENABLED_SERVICES+=,c-api,c-vol,c-sch
# Tempest
ENABLED_SERVICES+=,tempest
# ===== END localrc =====

Run stack.sh and do some sanity checks

./stack.sh
. ./openrc

openstack network list  # should show public and private networks

Create two nova instances that we can use as test http servers:

#create nova instances on private network
nova boot --image $(nova image-list | awk '/ cirros-.*-x86_64-uec / {print $2}') --flavor 1 --nic net-id=$(openstack network list | awk '/ private / {print $2}') node1
nova boot --image $(nova image-list | awk '/ cirros-.*-x86_64-uec / {print $2}') --flavor 1 --nic net-id=$(openstack network list | awk '/ private / {print $2}') node2
nova list # should show the nova instances just created

#add secgroup rules to allow ssh etc..
openstack security group rule create default --protocol icmp
openstack security group rule create default --protocol tcp --dst-port 22:22
openstack security group rule create default --protocol tcp --dst-port 80:80

Set up a simple web server on each of these instances. ssh into each instance (username ‘cirros’, password ‘cubswin:)’) and run

MYIP=$(ifconfig eth0|grep 'inet addr'|awk -F: '{print $2}'| awk '{print $1}')
while true; do echo -e "HTTP/1.0 200 OK\r\n\r\nWelcome to $MYIP" | sudo nc -l -p 80 ; done&

Phase 2: Create your load balancers¶

neutron lbaas-loadbalancer-create --name lb1 private-subnet
neutron lbaas-loadbalancer-show lb1  # Wait for the provisioning_status to be ACTIVE.
neutron lbaas-listener-create --loadbalancer lb1 --protocol HTTP --protocol-port 80 --name listener1
sleep 10  # Sleep since LBaaS actions can take a few seconds depending on the environment.
neutron lbaas-pool-create --lb-algorithm ROUND_ROBIN --listener listener1 --protocol HTTP --name pool1
sleep 10
neutron lbaas-member-create  --subnet private-subnet --address 10.0.0.3 --protocol-port 80 pool1
sleep 10
neutron lbaas-member-create  --subnet private-subnet --address 10.0.0.5 --protocol-port 80 pool1

Please note here that the “10.0.0.3” and “10.0.0.5” in the above commands are the IPs of the nodes (in my test run-thru, they were actually 10.2 and 10.4), and the address of the created LB will be reported as “vip_address” from the lbaas-loadbalancer-create, and a quick test of that LB is “curl that-lb-ip”, which should alternate between showing the IPs of the two nodes.