8dd89e52d0
Switch to "modern" way of building docs using sphinx-build directly, remove now unsed parts from setup.cfg. Upgrade to openstackdocstheme 1.20 and remove obsolete variables from conf.py. Convert external links to internal RST links so that Sphinx can verify that they are correct. Replace redirected links with new targets. Use opendev.org instead of github.com where appropriate. Change-Id: Iedcc008b170821aa74acefc02ec6a243a0dc307c
149 lines
5.5 KiB
ReStructuredText
149 lines
5.5 KiB
ReStructuredText
Devstack with Octavia Load Balancing
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====================================
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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://docs.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
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useful.
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Install devstack
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::
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git clone https://opendev.org/openstack/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 ``/opt/stack/devstack/local.conf`` to look like
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::
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[[local|localrc]]
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enable_plugin octavia https://opendev.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://opendev.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://opendev.org/openstack/barbican
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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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VERBOSE=True
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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 - 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-crt,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,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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openstack network list # should show public and private networks
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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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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 create --image $(openstack image list | awk '/ cirros-.*-x86_64-.* / {print $2}') --flavor 1 --nic net-id=$(openstack network list | awk '/ private / {print $2}') node2
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openstack server list # should show the nova instances just created
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#add secgroup rules to allow ssh etc..
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openstack security group rule create default --protocol icmp
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openstack security group rule create default --protocol tcp --dst-port 22:22
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openstack security group rule create default --protocol tcp --dst-port 80:80
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Set up a simple web server on each of these instances. ssh into each instance (username 'cirros', password 'cubswin:)' or 'gocubsgo') and run
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::
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MYIP=$(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 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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pip install python-octaviaclient
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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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