Devstack with Octavia Load Balancing
This guide will show you how to create a devstack with Octavia API enabled.
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://opendev.org/openstack/devstack
cd devstack/tools
sudo ./create-stack-user.sh
cd ../..
sudo mv devstack /opt/stack
sudo chown -R stack.stack /opt/stack/devstack
This will clone the current devstack code locally, then setup the “stack” account that devstack services will run under. Finally, it will move devstack into its default location in /opt/stack/devstack.
Edit your /opt/stack/devstack/local.conf to look like:
[[local|localrc]]
enable_plugin octavia https://opendev.org/openstack/octavia
# If you are enabling horizon, include the octavia dashboard
# enable_plugin octavia-dashboard https://opendev.org/openstack/octavia-dashboard.git
# If you are enabling barbican for TLS offload in Octavia, include it here.
# enable_plugin barbican https://opendev.org/openstack/barbican
# ===== BEGIN localrc =====
DATABASE_PASSWORD=password
ADMIN_PASSWORD=password
SERVICE_PASSWORD=password
SERVICE_TOKEN=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 - enable for the OpenStack web GUI
# ENABLED_SERVICES+=,horizon
# Nova
ENABLED_SERVICES+=,n-api,n-crt,n-cpu,n-cond,n-sch,n-api-meta,n-sproxy
ENABLED_SERVICES+=,placement-api,placement-client
# Glance
ENABLED_SERVICES+=,g-api
# Neutron
ENABLED_SERVICES+=,q-svc,q-agt,q-dhcp,q-l3,q-meta,neutron
ENABLED_SERVICES+=,octavia,o-cw,o-hk,o-hm,o-api
# Cinder
ENABLED_SERVICES+=,c-api,c-vol,c-sch
# Tempest
ENABLED_SERVICES+=,tempest
# Barbican - Optionally used for TLS offload in Octavia
# ENABLED_SERVICES+=,barbican
# ===== END localrc =====
Run stack.sh and do some sanity checks
sudo su - stack
cd /opt/stack/devstack
./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
openstack server create --image $(openstack image list | awk '/ cirros-.*-x86_64-.* / {print $2}') --flavor 1 --nic net-id=$(openstack network list | awk '/ private / {print $2}') node1
openstack server create --image $(openstack image list | awk '/ cirros-.*-x86_64-.* / {print $2}') --flavor 1 --nic net-id=$(openstack network list | awk '/ private / {print $2}') node2
openstack server list # should show the nova instances just created
#add secgroup rules to allow ssh etc..
openstack security group rule create default --protocol icmp
openstack security group rule create default --protocol tcp --dst-port 22:22
openstack security group rule create default --protocol tcp --dst-port 80:80
Set up a simple web server on each of these instances. Ssh into each instance (username ‘cirros’, password ‘cubswin:)’ or ‘gocubsgo’) and run:
MYIP=$(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 balancer
Make sure you have the ‘openstack loadbalancer’ commands:
Create your load balancer:
openstack loadbalancer create --name lb1 --vip-subnet-id private-subnet
openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
openstack loadbalancer listener create --protocol HTTP --protocol-port 80 --name listener1 lb1
openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
openstack loadbalancer pool create --lb-algorithm ROUND_ROBIN --listener listener1 --protocol HTTP --name pool1
openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
openstack loadbalancer healthmonitor create --delay 5 --timeout 2 --max-retries 1 --type HTTP pool1
openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
openstack loadbalancer member create --subnet-id private-subnet --address <web server 1 address> --protocol-port 80 pool1
openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
openstack loadbalancer member create --subnet-id private-subnet --address <web server 2 address> --protocol-port 80 pool1
Please note: The \
Phase 3: Test your load balancer
openstack loadbalancer show lb1 # Note the vip_address
curl http://<vip_address>
curl http://<vip_address>
This should show the “Welcome to \