Update user guide for Octavia
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+Devstack with Octavia Load Balancing
+====================================
+
+Starting with the OpenStack Pike release, Octavia is now a standalone service
+providing load balancing services for OpenStack.
+
+This guide will show you how to create a devstack with `Octavia API`_ enabled.
+
+.. _Octavia API: https://docs.openstack.org/api-ref/load-balancer/v2/index.html
+
+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]]
+ # ===== BEGIN localrc =====
+ DATABASE_PASSWORD=password
+ ADMIN_PASSWORD=password
+ SERVICE_PASSWORD=password
+ SERVICE_TOKEN=password
+ RABBIT_PASSWORD=password
+ GIT_BASE=https://opendev.org
+ # Optional settings:
+ # OCTAVIA_AMP_BASE_OS=centos
+ # OCTAVIA_AMP_DISTRIBUTION_RELEASE_ID=9-stream
+ # OCTAVIA_AMP_IMAGE_SIZE=3
+ # OCTAVIA_LB_TOPOLOGY=ACTIVE_STANDBY
+ # OCTAVIA_ENABLE_AMPHORAV2_JOBBOARD=True
+ # LIBS_FROM_GIT+=octavia-lib,
+ # Enable Logging
+ LOGFILE=$DEST/logs/stack.sh.log
+ VERBOSE=True
+ LOG_COLOR=True
+ enable_service rabbit
+ enable_plugin neutron $GIT_BASE/openstack/neutron
+ # Octavia supports using QoS policies on the VIP port:
+ enable_service q-qos
+ enable_service placement-api placement-client
+ # Octavia services
+ enable_plugin octavia $GIT_BASE/openstack/octavia master
+ enable_plugin octavia-dashboard $GIT_BASE/openstack/octavia-dashboard
+ enable_plugin ovn-octavia-provider $GIT_BASE/openstack/ovn-octavia-provider
+ enable_plugin octavia-tempest-plugin $GIT_BASE/openstack/octavia-tempest-plugin
+ enable_service octavia o-api o-cw o-hm o-hk o-da
+ # If you are enabling barbican for TLS offload in Octavia, include it here.
+ # enable_plugin barbican $GIT_BASE/openstack/barbican
+ # enable_service barbican
+ # Cinder (optional)
+ disable_service c-api c-vol c-sch
+ # Tempest
+ enable_service tempest
+ # ===== END localrc =====
+
+.. note::
+ For best performance it is highly recommended to use KVM
+ virtualization instead of QEMU.
+ Also make sure nested virtualization is enabled as documented in
+ :ref:`the respective guide <kvm_nested_virt>`.
+ By adding ``LIBVIRT_CPU_MODE="host-passthrough"`` to your
+ ``local.conf`` you enable the guest VMs to make use of all features your
+ host's CPU provides.
+
+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 $2}') node2
+ openstack server list # should show the nova instances just created
+
+ # add secgroup rules to allow ssh etc..
+ openstack security group rule create default --protocol icmp
+ openstack security group rule create default --protocol tcp --dst-port 22:22
+ openstack security group rule create default --protocol tcp --dst-port 80:80
+
+Set up a simple web server on each of these instances. One possibility is to use
+the `Golang test server`_ that is used by the Octavia project for CI testing
+as well.
+Copy the binary to your instances and start it as shown below
+(username 'cirros', password 'gocubsgo')::
+
+ INST_IP=<instance IP>
+ scp -O test_server.bin cirros@${INST_IP}:
+ ssh -f cirros@${INST_IP} ./test_server.bin -id ${INST_IP}
+
+When started this way the test server will respond to HTTP requests with
+its own IP.
+
+Phase 2: Create your load balancer
+----------------------------------
+
+Create your load balancer::
+
+ openstack loadbalancer create --wait --name lb1 --vip-subnet-id private-subnet
+ openstack loadbalancer listener create --wait --protocol HTTP --protocol-port 80 --name listener1 lb1
+ openstack loadbalancer pool create --wait --lb-algorithm ROUND_ROBIN --listener listener1 --protocol HTTP --name pool1
+ openstack loadbalancer healthmonitor create --wait --delay 5 --timeout 2 --max-retries 1 --type HTTP pool1
+ openstack loadbalancer member create --wait --subnet-id private-subnet --address <web server 1 address> --protocol-port 80 pool1
+ openstack loadbalancer member create --wait --subnet-id private-subnet --address <web server 2 address> --protocol-port 80 pool1
+
+Please note: The <web server # address> fields are the IP addresses of the nova
+servers created in Phase 1.
+Also note, using the API directly you can do all of the above commands in one
+API call.
+
+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 <IP>" message from each member server.
+
+
+.. _Golang test server: https://opendev.org/openstack/octavia-tempest-plugin/src/branch/master/octavia_tempest_plugin/contrib/test_server