OpenStack入门篇（二十二）之实现阿里云VPC的SDN网络
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1.修改/etc/neutron/neutron.conf配置
[root@linux-node1 ~]# vim /etc/neutron/neutron.conf [defalut] ... core_plugin = ml2 service_plugins = router <==之前是等于空，开启路由插件 allow_overlapping_ips = Ture <==允许重叠ip [root@linux-node1 ~]# vim /etc/neutron/plugins/ml2/ml2_conf.ini <==启用vxlan[ml2] type_drivers = flat,vlan,vxlan <==驱动类型 tenant_network_types = vxlan <==租户网络类型为vxlan mechanism_drivers = linuxbridge,l2population <==启用linuxbridge ml2机制 [ml2_type_vxlan] vni_ranges=1:1000 <==为私有网络配置Vxlan网络识别范围 配置linuxbridge代理 [root@linux-node1 ~]# vim /etc/neutron/plugins/ml2/linuxbridge_agent.ini [vxlan] enable_vxlan = True local_ip = 192.168.56.11 l2_population = True 配置layer-3代理(网络层)做路由 [root@linux-node1 ~]# vim /etc/neutron/l3_agent.ini 在``[DEFAULT]``部分，配置Linuxbridge接口驱动和外部网络网桥： interface_driver = neutron.agent.linux.interface.BridgeInterfaceDriver OVS(open vswitch)==>用于公有云 linuxbridge==>私有云
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2.安装配置计算节点
vim /etc/neutron/plugins/ml2/linuxbridge_agent.ini [vxlan] enable_vxlan = True local_ip = 192.168.56.12 l2_population = True
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3.重启服务
[root@linux-node1 ~]# systemctl restart neutron-server neutron-linuxbridge-agent neutron-l3-agent
[root@linux-node2 ~]# systemctl restart neutron-linuxbridge-agent
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4.创建自服务网络
①获取demo凭证 [root@linux-node1 ~]# source demo-openstack ②创建自服务网络 [root@linux-node1 ~]# openstack network create selfservice +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | admin_state_up | UP | | availability_zone_hints | | | availability_zones | | | created_at | 2017-12-14T02:20:57Z | | description | | | headers | | | id | 24bfcb74-238b-4709-bd4c-010983329266 | | ipv4_address_scope | None | | ipv6_address_scope | None | | mtu | 1450 | | name | selfservice | | port_security_enabled | True | | project_id | 02aaf7ba97114238b1d8169fedabb9be | | project_id | 02aaf7ba97114238b1d8169fedabb9be | | revision_number | 3 | | router:external | Internal | | shared | False | | status | ACTIVE | | subnets | | | tags | [] | | updated_at | 2017-12-14T02:20:57Z | +-------------------------+--------------------------------------+ ③创建子网 [root@linux-node1 ~]# openstack subnet create --network selfservice \ > --dns-nameserver 192.168.56.2 --gateway 172.16.1.1 \ > --subnet-range 172.16.1.0/24 selfservice-subnet +-------------------+--------------------------------------+ | Field | Value | +-------------------+--------------------------------------+ | allocation_pools | 172.16.1.2-172.16.1.254 | | cidr | 172.16.1.0/24 | | created_at | 2017-12-14T02:21:34Z | | description | | | dns_nameservers | 192.168.56.2 | | enable_dhcp | True | | gateway_ip | 172.16.1.1 | | headers | | | host_routes | | | id | 01941fd0-4cfa-44a6-8a09-df56a5e4314b | | ip_version | 4 | | ipv6_address_mode | None | | ipv6_ra_mode | None | | name | selfservice-subnet | | network_id | 24bfcb74-238b-4709-bd4c-010983329266 | | project_id | 02aaf7ba97114238b1d8169fedabb9be | | project_id | 02aaf7ba97114238b1d8169fedabb9be | | revision_number | 2 | | service_types | [] | | subnetpool_id | None | | updated_at | 2017-12-14T02:21:34Z | +-------------------+--------------------------------------+
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5.创建路由器
①获取admin凭证 [root@linux-node1 ~]# source admin-openstack ②更新public的网络 [root@linux-node1 ~]# neutron net-update public --router:external Updated network: public ③获取demo凭证 [root@linux-node1 ~]# source demo-openstack ④创建路由 [root@linux-node1 ~]# openstack router create router +-------------------------+--------------------------------------+ | Field | Value | +-------------------------+--------------------------------------+ | admin_state_up | UP | | availability_zone_hints | | | availability_zones | | | created_at | 2017-12-14T02:26:26Z | | description | | | external_gateway_info | null | | flavor_id | None | | headers | | | id | 1a189a9c-c8e3-4110-a51b-ae408dcbd830 | | name | router | | project_id | 02aaf7ba97114238b1d8169fedabb9be | | project_id | 02aaf7ba97114238b1d8169fedabb9be | | revision_number | 3 | | routes | | | status | ACTIVE | | updated_at | 2017-12-14T02:26:26Z | +-------------------------+--------------------------------------+ ⑤给路由器添加一个私网子网的接口 [root@linux-node1 ~]# neutron router-interface-add router selfservice-subnet Added interface 5c3b3398-ccf0-4091-bed5-0580f99f2cc0 to router router. ⑥给路由器设置公共网络网关 [root@linux-node1 ~]# neutron router-gateway-set router public Set gateway for router router ⑦打开neutron网络，并重启httpd服务 [root@linux-node1 ~]# vim /etc/openstack-dashboard/local-setting OPENSTACK_NEUTRON_NETWORK = { 'enable_router': True, 'enable_quotas': True, 'enable_ipv6': True, 'enable_distributed_router': True, 'enable_ha_router': True, 'enable_lb': True, 'enable_firewall': True, 'enable_***': True, 'enable_fip_topology_check': True, [root@linux-node2 ~]# systemctl restart httpd
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6.登录dashboard查看自服务网络：
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7.创建自服务网络的云主机：
网络选项：选择selfservice-subnet
此时，创建的云主机的ip：172.16.1.9是无法通过外网进行访问的，需要对其增加一个浮动ip，相当于一个外网ip的映射，通过路由器进行连接，如图：
浮动ip绑定："计算"-->"访问安全"-->"浮动ip"-->"分配给项目" 创建完毕后 "关联"到自服务网络的项目
查看网络拓扑结构：云主机连接自服务网络（selfservice），再连接路由器，路由器连接到公有网络
直接ping云主机内部ip：172.16.1.9是无法ping通的
[root@linux-node1 ~]# ping 172.16.1.9 PING 172.16.1.9 (172.16.1.9) 56(84) bytes of data. ^C --- 172.16.1.9 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3010ms
增加浮动ip后，可以ping通，并且可以通过ssh远程登录
[root@linux-node1 ~]# ping 192.168.56.111 PING 192.168.56.111 (192.168.56.111) 56(84) bytes of data. 64 bytes from 192.168.56.111: icmp_seq=1 ttl=63 time=1.19 ms 64 bytes from 192.168.56.111: icmp_seq=2 ttl=63 time=1.26 ms ^C --- 192.168.56.111 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1001ms rtt min/avg/max/mdev = 1.199/1.234/1.269/0.035 ms [root@linux-node1 ~]# ssh cirros@192.168.56.111 The authenticity of host '192.168.56.111 (192.168.56.111)' can't be established. RSA key fingerprint is SHA256:JGnicOkiSuFIvu5hea2od5L3CsPJwDbBxdqRjQ7zqaw. RSA key fingerprint is MD5:b8:b8:62:f3:36:e5:a9:af:46:ab:b7:3a:00:d6:0c:7e. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '192.168.56.111' (RSA) to the list of known hosts. $ ifconfig eth0 Link encap:Ethernet HWaddr FA:16:3E:37:6B:72 inet addr:172.16.1.9 Bcast:172.16.1.255 Mask:255.255.255.0 inet6 addr: fe80::f816:3eff:fe37:6b72/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1450 Metric:1 RX packets:140 errors:0 dropped:0 overruns:0 frame:0 TX packets:166 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:17275 (16.8 KiB) TX bytes:17482 (17.0 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
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