序：OpenStack Havana 部署在Ubuntu 12.04 Server 【OVS+GRE】
网络节点：
1.安装前更新系统
安装好ubuntu 12.04 Server 64bits后，进入root模式下完成配置：
sudo su -
- 添加Havana源：
#apt-get install python-software-properties
#add-apt-repository cloud-archive:havana
升级系统：
apt-get update
apt-get upgrade
apt-get dist-upgrade
2.安装更新ntp服务
- 安装ntp服务：
apt-get install ntp
- 配置ntp服务从控制节点上同步时间：
sed -i 's/server 0.ubuntu.pool.ntp.org/#server 0.ubuntu.pool.ntp.org/g' /etc/ntp.conf
sed -i 's/server 1.ubuntu.pool.ntp.org/#server 1.ubuntu.pool.ntp.org/g' /etc/ntp.conf
sed -i 's/server 2.ubuntu.pool.ntp.org/#server 2.ubuntu.pool.ntp.org/g' /etc/ntp.conf
sed -i 's/server 3.ubuntu.pool.ntp.org/#server 3.ubuntu.pool.ntp.org/g' /etc/ntp.conf #Set the network node to follow up your conroller node
sed -i 's/server ntp.ubuntu.com/server 10.10.10.2/g' /etc/ntp.conf service ntp restart
- 网卡配置，这一步有一定的亮点，因为现在我手里只有一块网卡，但是要配三个网段，最后会生成三个网桥，因此我这里还是用网络别名设备来配,安装OVS之前，网卡配置如下：
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.122.3
netmask 255.255.255.0
gateway 192.168.122.1
dns-nameservers 192.168.122.1
auto eth0:1
iface eth0:1 inet static
address 10.10.10.3
netmask 255.255.255.0
auto eth0:2
iface eth0:2 inet static
address 10.20.20.3
netmask 255.255.255.0
- 编辑/etc/sysctl.conf,开启路由转发和关闭包目的过滤，这样网络节点能协作VMs的traffic。
net.ipv4.ip_forward=1
net.ipv4.conf.all.rp_filter=0
net.ipv4.conf.default.rp_filter=0 #运行下面命令，使生效
sysctl -p
3.安装OpenVSwitch
- 安装OpenVSwitch软件包：
apt-get install openvswitch-controller openvswitch-switch openvswitch-datapath-dkms openvswitch-datapath-source
module-assistant auto-install openvswitch-datapath
/etc/init.d/openvswitch-switch restart
- 创建网桥
#br-int will be used for VM integration
ovs-vsctl add-br br-int #br-ex is used to make to VM accessable from the internet
ovs-vsctl add-br br-ex
- 把网卡eth0加入br-ex：
ovs-vsctl add-port br-ex eth0
- 重新修改网卡配置/etc/network/interfaces:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto br-ex
iface br-ex inet static
address 192.168.122.3
netmask 255.255.255.0
gateway 192.168.122.1
dns-nameservers 192.168.122.1
#For Exposing OpenStack API over the internet
auto eth0
iface eth0 inet manual
up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down
auto eth0:1
iface eth0:1 inet static
address 10.10.10.3
netmask 255.255.255.0
auto eth0:2
iface eth0:2 inet static
address 10.20.20.3
netmask 255.255.255.0
- 重启网络服务：
/etc/init.d/networking restart
eth0让网桥br-ex接管之后，访问外网就都br-ex处理了。不要忘了，我们只有一块网卡，接在同一个“交换机上”，所以你要注意一下eth0:1，eth0:2的route设置。
一切正常的话，输入route命令的输出应该如下：
Destination Gateway Genmask Flags Metric Ref Use Iface
default 192.168.122.1 0.0.0.0 UG 100 0 0 br-ex
10.10.10.0 * 255.255.255.0 U 0 0 0 br-ex
10.20.20.0 * 255.255.255.0 U 0 0 0 br-ex
192.168.122.0 * 255.255.255.0 U 0 0 0 br-ex
或者对应的ip route show 的输出为：
root@Network:~# ip route show
default via 192.168.122.1 dev br-ex metric 100
10.10.10.0/24 dev br-ex proto kernel scope link src 10.10.10.3
10.20.20.0/24 dev br-ex proto kernel scope link src 10.20.20.3
192.168.122.0/24 dev br-ex proto kernel scope link src 192.168.122.3
没错，10.10.10.0/24 与10.20.20.0/24指定的路由设备都是br-ex，否则你ping 控制节点（10.10.10.2）,是ping不通的。如果这两者指定的iface还是eth0，你应该按照如下处理：
route del -net 10.10.10.0/24 dev eth0
route del -net 10.20.20.0/24 dev eth0
ip route add 10.10.10.0/24 proto kernel scope link src 10.10.10.3 dev br-ex
ip route add 10.20.20.0/24 proto kernel scope link src 10.20.20.3 dev br-ex
为了每次重启主机之后，也能按照上面的网卡设置，你可以将上述内容加入到/etc/rc.local的脚本。当然，如果是在物理机上的单网卡，设置别名设备的时候，可以直接设为br-ex:1,br-ex:2,应该就没什么问题。但是如果在KVM的虚拟机上，即使用br-ex设置别名，你也要用ip route 设置为proto kernel scope link的属性。
- 查看网桥配置：
root@network:~# ovs-vsctl list-br
br-ex
br-int root@network:~# ovs-vsctl show
Bridge br-int
Port br-int
Interface br-int
type: internal
Bridge br-ex
Port "eth0"
Interface "eth0"
Port br-ex
Interface br-ex
type: internal
ovs_version: "1.4.0+build0"
4.Neutron-*
- 安装Neutron组件：
apt-get install neutron-plugin-openvswitch-agent neutron-dhcp-agent neutron-l3-agent neutron-metadata-agent
- 编辑/etc/neutron/api-paste.ini
[filter:authtoken]
paste.filter_factory = keystoneclient.middleware.auth_token:filter_factory
auth_host = 10.10.10.2
auth_port = 35357
auth_protocol = http
admin_tenant_name = service
admin_user = neutron
admin_password = admin
- 编辑OVS配置文件：/etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini
[OVS]
tenant_network_type = gre
enable_tunneling = True
tunnel_id_ranges = 1:1000
integration_bridge = br-int
tunnel_bridge = br-tun
local_ip = 10.20.20.3 #Firewall driver for realizing neutron security group function
[SECURITYGROUP]
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
- 更新/etc/neutron/metadata_agent.ini:
auth_url = http://10.10.10.2:35357/v2.0
auth_region = RegionOne
admin_tenant_name = service
admin_user = neutron
admin_password = admin # IP address used by Nova metadata server
nova_metadata_ip = 10.10.10.2 # TCP Port used by Nova metadata server
nova_metadata_port = 8775 metadata_proxy_shared_secret = helloOpenStack
- 编辑/etc/neutron/neutron.conf
rabbit_host = 10.10.10.2 [keystone_authtoken]
auth_host = 10.10.10.2
auth_port = 35357
auth_protocol = http
admin_tenant_name = service
admin_user = neutron
admin_password = admin
signing_dir = /var/lib/quantum/keystone-signing [database]
connection = mysql://neutronUser:neutronPass@10.10.10.2/neutron
- 编辑/etc/neutron/l3_agent.ini:
[DEFAULT]
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
use_namespaces = True
external_network_bridge = br-ex
signing_dir = /var/cache/neutron
admin_tenant_name = service
admin_user = neutron
admin_password = admin
auth_url = http://10.10.10.2:35357/v2.0
l3_agent_manager = neutron.agent.l3_agent.L3NATAgentWithStateReport
root_helper = sudo neutron-rootwrap /etc/neutron/rootwrap.conf
- 编辑/etc/neutron/dhcp_agent.ini:
[DEFAULT]
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
use_namespaces = True
signing_dir = /var/cache/neutron
admin_tenant_name = service
admin_user = neutron
admin_password = admin
auth_url = http://10.10.10.2:35357/v2.0
dhcp_agent_manager = neutron.agent.dhcp_agent.DhcpAgentWithStateReport
root_helper = sudo neutron-rootwrap /etc/neutron/rootwrap.conf
state_path = /var/lib/neutron
- 重启服务：
cd /etc/init.d/; for i in $( ls neutron-* ); do service $i restart; done
网络节点的服务部署完毕，下面就是计算节点的安装了