compute节点

yum -y install openstack-neutron-linuxbridge ebtables  ipset

修改配置文件：/etc/neutron/neutron.conf

#查看文件属性
ll /etc/neutron/neutron.conf
-rw-r----- 1 root neutron ... /etc/neutron/neutron.conf
#备份配置文件
cp /etc/neutron/neutron.conf{,.bak}
#重新生成配置文件
egrep -v '^#|^$' /etc/neutron/neutron.conf.bak > /etc/neutron/neutron.conf
#查看文件属性
ll /etc/neutron/neutron.conf
-rw-r----- 1 root neutron ... /etc/neutron/neutron.conf

#修改文件内容
vi /etc/neutron/neutron.conf

#指定连接的rabbitmq的用户密码123，指定使用keystone认证

[DEFAULT]

transport_url = rabbit://openstack:123@controller

auth_strategy = keystone

#配置keystone认证信息，注意将用户neutron密码改为：123

[keystone_authtoken]

www_authenticate_uri = http://controller:5000

auth_url = http://controller:5000

memcached_servers = controller:11211

auth_type = password

project_domain_name = default

user_domain_name = default

project_name = service

username = neutron

password = 123

#配置锁路径

[oslo_concurrency]

lock_path = /var/lib/neutron/tmp

创建provider提供商网络

compute节点

修改linuxbridge（网桥）插件配置文件：/etc/neutron/plugins/ml2/linuxbridge_agent.ini
#查看文件属性

ll /etc/neutron/plugins/ml2/linuxbridge_agent.ini
-rw-r----- 1 root neutron ...6524 5月 11 2021 /etc/neutron/plugins/ml2/linuxbridge_agent.ini
#备份配置文件
cp /etc/neutron/plugins/ml2/linuxbridge_agent.ini{,.bak}
#重新生成配置文件
egrep -v '^#|^$'  /etc/neutron/plugins/ml2/linuxbridge_agent.ini.bak >  /etc/neutron/plugins/ml2/linuxbridge_agent.ini
#查看文件属性
ll /etc/neutron/plugins/ml2/linuxbridge_agent.ini

#修改文件内容
vi /etc/neutron/plugins/ml2/linuxbridge_agent.ini

[linux_bridge]

# 指定桥接网络provider与本机ens34物理网卡做关联 ，后期给虚拟机分配 external(外部)网络地址，然后虚拟机就可以通过ens34上外网；桥接的物理网卡名有可能是bind0、br0等

physical_interface_mappings = provider:ens34

[vxlan]

#不启用vxlan

enable_vxlan = false

[securitygroup]

#启用安全组并配置 Linux 桥接 iptables 防火墙驱动

enable_security_group = true

firewall_driver =

neutron.agent.linux.iptables_firewall.IptablesFirewallDriver

确保系统内核支持网桥过滤器

#加载modprobe br_netfilter网桥过滤器模块

modprobe br_netfilter && lsmod | grep br_netfilter

br_netfilter 22256 0

bridge 151336 1 br_netfilter

#修改内核配置文件/etc/sysctl.conf，开启ipv4与ipv6的网络过滤功能

vim /etc/sysctl.conf

...

net.bridge.bridge-nf-call-iptables = 1

net.bridge.bridge-nf-call-ip6tables = 1

#重新加载配置文件

sysctl -p

systemctl restart openstack-nova-compute.service

 开启neutron服务、设置开机自启动

systemctl enable neutron-linuxbridge-agent.service

systemctl start neutron-linuxbridge-agent.service

systemctl is-active neutron-linuxbridge-agent.service

 服务验证 

controller节点

source admin-openrc
openstack network agent list

 到这里为止我们的网络服务neutron就搭建完毕了，现在我们的OpenStack环境就已经达到了启动实例的条件了。