从OpenStack Pike版本开始，Octavia现在是一个独立服务，为OpenStack提供负载平衡服务。
本指南将向您展示如何创建启用了Octavia API的devstack。

 

阶段1：创建DevStack + 2个nova实例

 

首先，设置一个至少8 GB RAM和16 GB磁盘空间的vm，确保它已更新。 安装git和您认为有用的任何其他开发人员工具。

Install devstack

 

git clone https://git.openstack.org/openstack-dev/devstack
cd devstack/tools
sudo ./create-stack-user.sh
cd ../..
sudo mv devstack /opt/stack
sudo chown -R stack.stack /opt/stack/devstack

 

这将在本地克隆当前的devstack代码，然后设置devstack服务将在其下运行的"stack"帐户。 最后，它会将devstack移动到/opt/stack/devstack中的默认位置。

 

编辑/opt/stack/devstack/local.conf看起来像

[[local|localrc]]
enable_plugin octavia https://git.openstack.org/openstack/octavia
# If you are enabling horizon, include the octavia dashboard
# enable_plugin octavia-dashboard https://git.openstack.org/openstack/octavia-dashboard.git
# If you are enabling barbican for TLS offload in Octavia, include it here.
# enable_plugin barbican https://github.com/openstack/barbican.git

# If you have python3 available:
# USE_PYTHON3=True

# ===== 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-obj,n-cpu,n-cond,n-sch,n-api-meta,n-sproxy
ENABLED_SERVICES+=,placement-api,placement-client
# Glance
ENABLED_SERVICES+=,g-api,g-reg
# 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 =====

 

运行stack.sh并进行一些健全性检查

 

sudo su - stack
cd /opt/stack/devstack
./stack.sh
. ./openrc

openstack network list  # should show public and private networks

 

创建两个我们可以用作测试http服务器的nova实例：

#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 creeate --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

 

在每个实例上设置一个简单的Web服务器。 ssh到每个实例（用户名'cirros'，密码'cubswin :)'或'gocubsgo'）并运行

 

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&

 

阶段2：创建负载均衡器

 

确保你有'openstack loadbalancer'命令：

pip install python-octaviaclient

创建负载均衡器：

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

 

请注意：<web server＃address>字段是在阶段1中创建的nova服务器的IP地址。另请注意，直接使用API，您可以在一次API调用中执行上述所有命令。

 

 

阶段3：测试负载均衡器

 

openstack loadbalancer show lb1 # Note the vip_address
curl http://<vip_address>
curl http://<vip_address>

 

这应显示每个成员服务器的“欢迎使用<IP>”消息。