一. 简单介绍
在openstack私有云平台的应用场景中，涉及多台虚拟机实例进行高可用的绑定，这里我们需要在云平台中提供一个IP给高可用场景切换，这里介绍keepalived + allow_address_pairs实现虚拟机的高可用
二.创建port和指定vip
[root@openstack01 ~]# neutron net-list
+--------------------------------------+-------------+----------------------------------+------------------------------------------------------+
| id | name | tenant_id | subnets |
+--------------------------------------+-------------+----------------------------------+------------------------------------------------------+
| 0fbab9a2-9838-43f9-b1a3-0302ee53eb70 | virtual-net | c1f5a356a4f549bb90234c05d60e0a35 | d09ba832-6734-42e7-b127-00114bbbbe83 10.0.0.0/24 |
| f2cbbf07-bb60-4ef8-acdd-bee4a793b51b | public1 | c1f5a356a4f549bb90234c05d60e0a35 | b5614524-96c2-4f5f-9507-a95a1627ac4d 192.168.30.0/24 |
+--------------------------------------+-------------+----------------------------------+------------------------------------------------------+这里找出virtual-net对应的id号( 0fbab9a2-9838-43f9-b1a3-0302ee53eb70)
创建port和绑定内部IP：
[root@openstack01 ~]# neutron port-create --fixed-ip ip_address=10.0.0.150 0fbab9a2-9838-43f9-b1a3-0302ee53eb70
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
Created a new port:
+-----------------------+-----------------------------------------------------------------------------------+
| Field | Value |
+-----------------------+-----------------------------------------------------------------------------------+
| admin_state_up | True |
| allowed_address_pairs | |
| binding:host_id | |
| binding:profile | {} |
| binding:vif_details | {} |
| binding:vif_type | unbound |
| binding:vnic_type | normal |
| created_at | 2018-09-28T01:15:18Z |
| description | |
| device_id | |
| device_owner | |
| extra_dhcp_opts | |
| fixed_ips | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.150"} |
| id | 715d39e9-8341-4124-a8e4-3a4e2700ee36 |
| mac_address | fa:16:3e:f0:2b:85 |
| name | |
| network_id | 0fbab9a2-9838-43f9-b1a3-0302ee53eb70 |
| port_security_enabled | True |
| project_id | c1f5a356a4f549bb90234c05d60e0a35 |
| revision_number | 6 |
| security_groups | 8da47344-9c63-4229-b89a-b653afad65b6 |
| status | DOWN |
| tags | |
| tenant_id | c1f5a356a4f549bb90234c05d60e0a35 |
| updated_at | 2018-09-28T01:15:19Z |
+-----------------------+-----------------------------------------------------------------------------------+
注意：ip_address是keepalived的vip，后面的字符串是virtual-net对应的id
创建完毕后，我们可以看到端口的信息显示unbound未绑定的。下面我们将这个端口信息更新到对应的虚拟机中。
三. 更新端口信息到对应的实例
如上图所示，有两台虚拟机，对应的IP地址分别为10.0.0.13和10.0.0.6，这里我们将上面创建的端口信息更新到这两台实例中去：
查看对应IP端口port的ID信息：
[root@openstack01 ~]# neutron port-list
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
+--------------------------------------+--------+----------------------------------+-------------------+--------------------------------------------------------------------------------------+
| id | name | tenant_id | mac_address | fixed_ips |
+--------------------------------------+--------+----------------------------------+-------------------+--------------------------------------------------------------------------------------+
| 35d83ee9-e574-45a3-9193-bdd746102807 | | c1f5a356a4f549bb90234c05d60e0a35 | fa:16:3e:e2:42:ad | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.2"} |
| 468bf092-324e-4c0d-a7f7-603f19b388fc | | | fa:16:3e:b3:19:92 | {"subnet_id": "b5614524-96c2-4f5f-9507-a95a1627ac4d", "ip_address": "192.168.30.57"} |
| 52da60be-e2d1-47b6-8d84-8634bd3a18f8 | | c1f5a356a4f549bb90234c05d60e0a35 | fa:16:3e:0c:50:55 | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.6"} |
| 715d39e9-8341-4124-a8e4-3a4e2700ee36 | | c1f5a356a4f549bb90234c05d60e0a35 | fa:16:3e:f0:2b:85 | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.150"} |
| a6632ddd-588c-46f2-ad98-edb4a3b5dda3 | | c1f5a356a4f549bb90234c05d60e0a35 | fa:16:3e:fe:e2:67 | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.1"} |
| a9629c47-cf80-40d3-864f-f3ce9c7fe7ca | | c1f5a356a4f549bb90234c05d60e0a35 | fa:16:3e:ff:90:81 | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.13"} |
| da2afbf5-33c4-48ca-8ab3-136d48628631 | | | fa:16:3e:08:af:07 | {"subnet_id": "b5614524-96c2-4f5f-9507-a95a1627ac4d", "ip_address": "192.168.30.53"} |
| dc993931-499b-440e-9980-4f8e7ceb6cb4 | | | fa:16:3e:87:32:bf | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.5"} |
| e97c25fe-f08b-4230-9ccf-e34f0a2e5d4b | | | fa:16:3e:d0:d5:85 | {"subnet_id": "b5614524-96c2-4f5f-9507-a95a1627ac4d", "ip_address": "192.168.30.52"} |
| e9841b66-17d4-4a7d-8f74-e27b33d24d6d | | | fa:16:3e:da:c0:96 | {"subnet_id": "b5614524-96c2-4f5f-9507-a95a1627ac4d", "ip_address": "192.168.30.51"} |
| f33564a2-37b2-4df8-a14f-ce2c31402f25 | port-1 | c1f5a356a4f549bb90234c05d60e0a35 | fa:16:3e:dc:1c:d3 | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.50"} |
+--------------------------------------+--------+----------------------------------+-------------------+--------------------------------------------------------------------------------------+更新虚拟机10.0.0.13端口信息：
[root@openstack01 ~]# neutron port-update a9629c47-cf80-40d3-864f-f3ce9c7fe7ca --allowed_address_pairs list=true type=dict ip_address=10.0.0.150
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
Updated port: a9629c47-cf80-40d3-864f-f3ce9c7fe7ca更新虚拟机10.0.0.6的端口信息：
[root@openstack01 ~]# neutron port-update 52da60be-e2d1-47b6-8d84-8634bd3a18f8 --allowed_address_pairs list=true type=dict ip_address=10.0.0.150
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
Updated port: 52da60be-e2d1-47b6-8d84-8634bd3a18f8上面的操作完成后，我们可以通过下面的命令查看更新的端口信息：
[root@openstack01 ~]# neutron port-show a9629c47-cf80-40d3-864f-f3ce9c7fe7ca
neutron CLI is deprecated and will be removed in the future. Use openstack CLI instead.
+-----------------------+----------------------------------------------------------------------------------+
| Field | Value |
+-----------------------+----------------------------------------------------------------------------------+
| admin_state_up | True |
| allowed_address_pairs | {"ip_address": "10.0.0.150", "mac_address": "fa:16:3e:ff:90:81"} |
| binding:host_id | openstack01 |
| binding:profile | {} |
| binding:vif_details | {"port_filter": true, "datapath_type": "system", "ovs_hybrid_plug": true} |
| binding:vif_type | ovs |
| binding:vnic_type | normal |
| created_at | 2018-09-28T01:18:09Z |
| description | |
| device_id | 59cdecdd-2e42-48cc-b76f-29d8fee78183 |
| device_owner | compute:nova |
| extra_dhcp_opts | |
| fixed_ips | {"subnet_id": "d09ba832-6734-42e7-b127-00114bbbbe83", "ip_address": "10.0.0.13"} |
| id | a9629c47-cf80-40d3-864f-f3ce9c7fe7ca |
| mac_address | fa:16:3e:ff:90:81 |
| name | |
| network_id | 0fbab9a2-9838-43f9-b1a3-0302ee53eb70 |
| port_security_enabled | True |
| project_id | c1f5a356a4f549bb90234c05d60e0a35 |
| revision_number | 12 |
| security_groups | 8da47344-9c63-4229-b89a-b653afad65b6 |
| status | ACTIVE |
| tags | |
| tenant_id | c1f5a356a4f549bb90234c05d60e0a35 |
| updated_at | 2018-09-28T01:27:54Z |
+-----------------------+----------------------------------------------------------------------------------+
我们可以看到虚拟机端口信息已经更新了10.0.0.150的IP信息和MAC地址。
四. 绑定浮动IP
-
在实际的应用场景中，我们需要将虚拟机绑定一个浮动IP来提供给外部的业务访问，这里需要将浮动IP绑定到keepalived 的VIP对应的端口上
-
将分配的浮动IP绑定到keepalived的vip端口上：
