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OpenStackstein安装（八）networkoption1-创新互联

安装和配置网络组件在controller节点上

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  1. 安装包
    # yum install openstack-neutron openstack-neutron-ml2 openstack-neutron-linuxbridge ebtables
  2. 配置服务器组件
网络服务组件配置包括数据，验证机制，消息队列，拓扑改变通知和插件.
Edit the /etc/neutron/neutron.conf file and complete the following actions:
○ In the [database] section, configure database access:
    [database]
    # ...
    connection = mysql+pymysql://neutron:neutron123@dbs.flex.net/neutron
    注意：注释或移除其它连接选项在[database]区域中

○ In the [DEFAULT] section, enable the Modular Layer 2 (ML2) plug-in and disable additional plug-ins:
    [DEFAULT]
    # ...
    core_plugin = ml2
    service_plugins =

○ In the [DEFAULT] section, configure RabbitMQ message queue access:
    [DEFAULT]
    # ...
    transport_url = rabbit://openstack:openstack123@dbs.flex.net

○ In the [DEFAULT] and [keystone_authtoken] sections, configure Identity service access:
    [DEFAULT]
    # ...
    auth_strategy = keystone

    [keystone_authtoken]
    # ...
    www_authenticate_uri = http://stack.flex.net:5000
    auth_url = http://stack.flex.net:5000
    memcached_servers = dbs.flex.net:11211
    auth_type = password
    project_domain_name = default
    user_domain_name = default
    project_name = service
    username = neutron
    password = neutron123
    注意：注释或移除其它连接选项在[keystone_authtoken]区域中

○ In the [DEFAULT] and [nova] sections, configure Networking to notify Compute of network topology changes:
    [DEFAULT]
    # ...
    notify_nova_on_port_status_changes = true
    notify_nova_on_port_data_changes = true

    [nova]
    auth_url = http://stack.flex.net:5000
    auth_type = password
    project_domain_name = default
    user_domain_name = default
    region_name = RegionOne
    project_name = service
    username = nova
    password = nova123

○ In the [oslo_concurrency] section, configure the lock path:
    [oslo_concurrency]
    # ...
    lock_path = /var/lib/neutron/tmp
  1. 配置模块Layer 2 (ML2)插件
    实列中使用ML2插件，ML2使用Linux bridge机制建立layer-2(桥接和交换)虚拟网络架构。
    Edit the /etc/neutron/plugins/ml2/ml2_conf.ini file and complete the following actions:
○ In the [ml2] section, enable flat and VLAN networks:
    [ml2]
    # ...
    type_drivers = flat,vlan

○ In the [ml2] section, disable self-service networks:
    [ml2]
    # ...
    tenant_network_types =

○ In the [ml2] section, enable the Linux bridge mechanism:
    [ml2]
    # ...
    mechanism_drivers = linuxbridge
    警告：配置ML2插件后, 从type_drivers移除这个选项会导致数据库不一致.

○ In the [ml2] section, enable the port security extension driver:
    [ml2]
    # ...
    extension_drivers = port_security

○ In the [ml2_type_flat] section, configure the provider virtual network as a flat network:
    [ml2_type_flat]
    # ...
    flat_networks = provider

○ In the [securitygroup] section, enable ipset to increase efficiency of security group rules:
    [securitygroup]
    # ...
    enable_ipset = true
  1. Configure the Linux bridge agent
    The Linux bridge agent builds layer-2 (bridging and switching) virtual networking infrastructure for instances and handles security groups.
    Edit the /etc/neutron/plugins/ml2/linuxbridge_agent.ini file and complete the following actions:
○ In the [linux_bridge] section, map the provider virtual network to the provider physical network interface:
    [linux_bridge]
    physical_interface_mappings = provider:eht1
    使用eth2物理网络接口做为租户的网络连接.

○ In the [vxlan] section, disable VXLAN overlay networks:
    [vxlan]
    enable_vxlan = false
○ In the [securitygroup] section, enable security groups and configure the Linux bridge iptables firewall driver:
    [securitygroup]
    # ...
    enable_security_group = true
    firewall_driver = neutron.agent.linux.iptables_firewall.IptablesFirewallDriver

○ Ensure your Linux operating system kernel supports network bridge filters by verifying all the following sysctl values are set to 1:
    net.bridge.bridge-nf-call-iptables
    net.bridge.bridge-nf-call-ip6tables

    #  modprobe br_netfilter
    #  vi /etc/sysctl.conf
    net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1 
    # sysctl -p
    net.bridge.bridge-nf-call-ip6tables = 1
    net.bridge.bridge-nf-call-iptables = 1

    为了网络支持桥接, 通常的需要加载br_netfilter内核模块. 但这里可以忽略错误，当你重启neutron时会自动加载.

  1. Configure the DHCP agent

    The DHCP agent provides DHCP services for virtual networks.
Edit the /etc/neutron/dhcp_agent.ini file and complete the following actions:
○ In the [DEFAULT] section, configure the Linux bridge interface driver, Dnsmasq DHCP driver, and enable isolated metadata so instances on provider networks can access metadata over the network:
[DEFAULT]
# ...
interface_driver = linuxbridge
dhcp_driver = neutron.agent.linux.dhcp.Dnsmasq
enable_isolated_metadata = true

完成后返回网络配置或继续网络选项2.

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