我已按照 Mitaka 设置指南设置了我的第一个 OpenStack 云。一切顺利（第二次！），但是我现在遇到了网络问题。实例启动正常，并通过 DHCP 为其分配了一个 IP，但无法 ping 通。我不知道我的网络是否设置正确，因此我在下面提供了相应的输出。
我使用选项 2 - “自助服务网络”设置了 Mitaka，但为了简单起见，我只创建了一个 Flat DHCP“提供商”网络，只是为了了解一下情况。在我的测试设置中，我只有一个可用的公共 IP 地址，xxx111
root@controller:~# openstack network list
+--------------------------------------+----------+--------------------------------------+
| ID | Name | Subnets |
+--------------------------------------+----------+--------------------------------------+
| 2a14a7d2-929b-49f8-8711-f5f1742fc523 | provider | 17681cf7-5ac7-426d-8ea8-91b3cf810141 |
+--------------------------------------+----------+--------------------------------------+
root@controller:~# openstack network show 2a14a7d2-929b-49f8-8711-f5f1742fc523
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | UP |
| availability_zone_hints | |
| availability_zones | nova |
| created_at | 2016-04-29T19:25:56 |
| description | |
| id | 2a14a7d2-929b-49f8-8711-f5f1742fc523 |
| ipv4_address_scope | None |
| ipv6_address_scope | None |
| mtu | 1500 |
| name | provider |
| port_security_enabled | True |
| project_id | 4864e2e05328471a849c9cb26ed4e27e |
| provider:network_type | flat |
| provider:physical_network | provider |
| provider:segmentation_id | None |
| router_external | Internal |
| shared | True |
| status | ACTIVE |
| subnets | 17681cf7-5ac7-426d-8ea8-91b3cf810141 |
| tags | [] |
| updated_at | 2016-05-02T20:35:32 |
+---------------------------+--------------------------------------+
root@controller:~# openstack subnet show 17681cf7-5ac7-426d-8ea8-91b3cf810141
+-------------------+--------------------------------------+
| Field | Value |
+-------------------+--------------------------------------+
| allocation_pools | x.x.164.111-x.x.164.111 |
| cidr | x.x.164.0/24 |
| created_at | 2016-04-30T07:16:23 |
| description | |
| dns_nameservers | 213.186.33.99 |
| enable_dhcp | True |
| gateway_ip | x.x.164.252 |
| host_routes | |
| id | 17681cf7-5ac7-426d-8ea8-91b3cf810141 |
| ip_version | 4 |
| ipv6_address_mode | None |
| ipv6_ra_mode | None |
| name | provider |
| network_id | 2a14a7d2-929b-49f8-8711-f5f1742fc523 |
| project_id | 4864e2e05328471a849c9cb26ed4e27e |
| subnetpool_id | None |
| updated_at | 2016-04-30T07:16:23 |
+-------------------+--------------------------------------+
root@controller:~# openstack server show f604d990-cadc-433c-b617-e3ea5f68f3ad
+--------------------------------------+----------------------------------------------------------+
| Field | Value |
+--------------------------------------+----------------------------------------------------------+
| OS-DCF:diskConfig | AUTO |
| OS-EXT-AZ:availability_zone | nova |
| OS-EXT-SRV-ATTR:host | compute1 |
| OS-EXT-SRV-ATTR:hypervisor_hostname | compute1 |
| OS-EXT-SRV-ATTR:instance_name | instance-0000000c |
| OS-EXT-STS:power_state | 1 |
| OS-EXT-STS:task_state | None |
| OS-EXT-STS:vm_state | active |
| OS-SRV-USG:launched_at | 2016-05-03T15:30:34.000000 |
| OS-SRV-USG:terminated_at | None |
| accessIPv4 | |
| accessIPv6 | |
| addresses | provider=x.x.x.111 |
| config_drive | |
| created | 2016-05-03T15:30:27Z |
| flavor | m1.medium (3) |
| hostId | a8af2b53ead6cfc050a24e875e3c42fa32ece6c3002652123cd04d2c |
| id | f604d990-cadc-433c-b617-e3ea5f68f3ad |
| image | Ubuntu 14.04 LTS (63576a8c-408f-4a59-947d-d7ab3bd60a67) |
| key_name | mykey |
| name | test |
| os-extended-volumes:volumes_attached | [] |
| progress | 0 |
| project_id | 4864e2e05328471a849c9cb26ed4e27e |
| properties | |
| security_groups | [{u'name': u'default'}] |
| status | ACTIVE |
| updated | 2016-05-03T15:30:34Z |
| user_id | 93f3b9fa687647e2838afac8f40ae020 |
+--------------------------------------+----------------------------------------------------------+
root@controller:~# openstack security group show default
+-------------+--------------------------------------------------------------------------------------------------------+
| Field | Value |
+-------------+--------------------------------------------------------------------------------------------------------+
| description | Default security group |
| id | 2884d4ac-a91f-411a-9a2b-eb249ddf5ef0 |
| name | default |
| project_id | 4864e2e05328471a849c9cb26ed4e27e |
| rules | id='10f8ef55-2275-4f25-94f9-4e38dbec3ccf', ip_protocol='tcp', ip_range='0.0.0.0/0', port_range='22:22' |
| | id='b5ce2770-f099-4944-b7f8-8cc660c09a40', remote_security_group='default' |
| | id='eda22bb6-529b-45f7-b4ab-48ef1b8b271a', ip_protocol='icmp', ip_range='0.0.0.0/0' |
| | id='ef5edd41-c81c-42dc-8f95-26ad9ff20dc4', remote_security_group='default' |
+-------------+--------------------------------------------------------------------------------------------------------+