Update the devstack LBaaS guide for Octavia
The existing devstack guide for load balancing is out of date. This patch updates the guide to reflect the current way to install devstack with the Octavia plugin(s). Change-Id: Id48b70b50e44ec7b965d969b2d93f77543d7364c
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Michael Johnson
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@ -1,39 +1,54 @@
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Configure Load-Balancer Version 2
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=================================
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Devstack with Octavia Load Balancing
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====================================
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Starting in the OpenStack Liberty release, the
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`neutron LBaaS v2 API <https://developer.openstack.org/api-ref/network/v2/index.html>`_
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is now stable while the LBaaS v1 API has been deprecated. The LBaaS v2 reference
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driver is based on Octavia.
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Starting with the OpenStack Pike release, Octavia is now a standalone service
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providing load balancing services for OpenStack.
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This guide will show you how to create a devstack with `Octavia API`_ enabled.
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.. _Octavia API: https://developer.openstack.org/api-ref/load-balancer/v2/index.html
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Phase 1: Create DevStack + 2 nova instances
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--------------------------------------------
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First, set up a vm of your choice with at least 8 GB RAM and 16 GB disk space,
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make sure it is updated. Install git and any other developer tools you find useful.
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make sure it is updated. Install git and any other developer tools you find
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useful.
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Install devstack
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::
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git clone https://git.openstack.org/openstack-dev/devstack
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cd devstack
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cd devstack/tools
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sudo ./create-stack-user.sh
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cd ../..
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sudo mv devstack /opt/stack
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sudo chown -R stack.stack /opt/stack/devstack
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This will clone the current devstack code locally, then setup the "stack"
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account that devstack services will run under. Finally, it will move devstack
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into its default location in /opt/stack/devstack.
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Edit your ``local.conf`` to look like
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Edit your ``/opt/stack/devstack/local.conf`` to look like
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::
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[[local|localrc]]
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# Load the external LBaaS plugin.
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enable_plugin neutron-lbaas https://git.openstack.org/openstack/neutron-lbaas
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enable_plugin octavia https://git.openstack.org/openstack/octavia
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# If you are enabling horizon, include the octavia dashboard
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# enable_plugin octavia-dashboard https://git.openstack.org/openstack/octavia-dashboard.git
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# If you are enabling barbican for TLS offload in Octavia, include it here.
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# enable_plugin barbican https://github.com/openstack/barbican.git
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# If you have python3 available:
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# USE_PYTHON3=True
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# ===== BEGIN localrc =====
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DATABASE_PASSWORD=password
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ADMIN_PASSWORD=password
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SERVICE_PASSWORD=password
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SERVICE_TOKEN=password
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RABBIT_PASSWORD=password
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# Enable Logging
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LOGFILE=$DEST/logs/stack.sh.log
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@ -41,27 +56,30 @@ Edit your ``local.conf`` to look like
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LOG_COLOR=True
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# Pre-requisite
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ENABLED_SERVICES=rabbit,mysql,key
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# Horizon
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ENABLED_SERVICES+=,horizon
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# Horizon - enable for the OpenStack web GUI
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# ENABLED_SERVICES+=,horizon
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# Nova
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ENABLED_SERVICES+=,n-api,n-cpu,n-cond,n-sch
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ENABLED_SERVICES+=,n-api,n-crt,n-obj,n-cpu,n-cond,n-sch,n-api-meta,n-sproxy
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ENABLED_SERVICES+=,placement-api,placement-client
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# Glance
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ENABLED_SERVICES+=,g-api,g-reg
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# Neutron
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ENABLED_SERVICES+=,q-svc,q-agt,q-dhcp,q-l3,q-meta
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# Enable LBaaS v2
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ENABLED_SERVICES+=,q-lbaasv2
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ENABLED_SERVICES+=,q-svc,q-agt,q-dhcp,q-l3,q-meta,neutron
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ENABLED_SERVICES+=,octavia,o-cw,o-hk,o-hm,o-api
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# Cinder
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ENABLED_SERVICES+=,c-api,c-vol,c-sch
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# Tempest
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ENABLED_SERVICES+=,tempest
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# Barbican - Optionally used for TLS offload in Octavia
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# ENABLED_SERVICES+=,barbican
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# ===== END localrc =====
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Run stack.sh and do some sanity checks
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::
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sudo su - stack
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cd /opt/stack/devstack
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./stack.sh
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. ./openrc
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@ -72,38 +90,59 @@ Create two nova instances that we can use as test http servers:
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::
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#create nova instances on private network
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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
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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
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nova list # should show the nova instances just created
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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
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openstack server creeate --image $(openstack image list | awk '/ cirros-.*-x86_64-.* / {print $2}') --flavor 1 --nic net-id=$(openstack network list | awk '/ private / {print $2}') node2
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openstack server list # should show the nova instances just created
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#add secgroup rules to allow ssh etc..
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openstack security group rule create default --protocol icmp
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openstack security group rule create default --protocol tcp --dst-port 22:22
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openstack security group rule create default --protocol tcp --dst-port 80:80
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Set up a simple web server on each of these instances. ssh into each instance (username 'cirros', password 'cubswin:)') and run
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Set up a simple web server on each of these instances. ssh into each instance (username 'cirros', password 'cubswin:)' or 'gocubsgo') and run
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::
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MYIP=$(ifconfig eth0|grep 'inet addr'|awk -F: '{print $2}'| awk '{print $1}')
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while true; do echo -e "HTTP/1.0 200 OK\r\n\r\nWelcome to $MYIP" | sudo nc -l -p 80 ; done&
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Phase 2: Create your load balancers
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------------------------------------
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Phase 2: Create your load balancer
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----------------------------------
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Make sure you have the 'openstack loadbalancer' commands:
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::
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neutron lbaas-loadbalancer-create --name lb1 private-subnet
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neutron lbaas-loadbalancer-show lb1 # Wait for the provisioning_status to be ACTIVE.
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neutron lbaas-listener-create --loadbalancer lb1 --protocol HTTP --protocol-port 80 --name listener1
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sleep 10 # Sleep since LBaaS actions can take a few seconds depending on the environment.
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neutron lbaas-pool-create --lb-algorithm ROUND_ROBIN --listener listener1 --protocol HTTP --name pool1
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sleep 10
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neutron lbaas-member-create --subnet private-subnet --address 10.0.0.3 --protocol-port 80 pool1
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sleep 10
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neutron lbaas-member-create --subnet private-subnet --address 10.0.0.5 --protocol-port 80 pool1
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pip install python-octaviaclient
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Please note here that the "10.0.0.3" and "10.0.0.5" in the above commands are the IPs of the nodes
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(in my test run-thru, they were actually 10.2 and 10.4), and the address of the created LB will be
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reported as "vip_address" from the lbaas-loadbalancer-create, and a quick test of that LB is
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"curl that-lb-ip", which should alternate between showing the IPs of the two nodes.
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Create your load balancer:
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::
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openstack loadbalancer create --name lb1 --vip-subnet-id private-subnet
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openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
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openstack loadbalancer listener create --protocol HTTP --protocol-port 80 --name listener1 lb1
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openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
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openstack loadbalancer pool create --lb-algorithm ROUND_ROBIN --listener listener1 --protocol HTTP --name pool1
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openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
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openstack loadbalancer healthmonitor create --delay 5 --timeout 2 --max-retries 1 --type HTTP pool1
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openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
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openstack loadbalancer member create --subnet-id private-subnet --address <web server 1 address> --protocol-port 80 pool1
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openstack loadbalancer show lb1 # Wait for the provisioning_status to be ACTIVE.
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openstack loadbalancer member create --subnet-id private-subnet --address <web server 2 address> --protocol-port 80 pool1
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Please note: The <web server # address> fields are the IP addresses of the nova
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servers created in Phase 1.
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Also note, using the API directly you can do all of the above commands in one
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API call.
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Phase 3: Test your load balancer
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--------------------------------
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::
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openstack loadbalancer show lb1 # Note the vip_address
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curl http://<vip_address>
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curl http://<vip_address>
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This should show the "Welcome to <IP>" message from each member server.
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