【openstack N版】——摘除一个计算节点

1.查看计算节点

 #查看所有计算节点
 [root@open-control01 ~]# nova service-list
+----+------------------+--------------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary           | Host               | Zone     | Status  | State | Updated_at                 | Disabled Reason |
+----+------------------+--------------------+----------+---------+-------+----------------------------+-----------------+
| 1  | nova-conductor   | open-control01     | internal | enabled | up    | 2017-05-02T02:22:09.000000 | -               |
| 2  | nova-scheduler   | open-control01     | internal | enabled | up    | 2017-05-02T02:22:03.000000 | -               |
| 3  | nova-consoleauth | open-control01     | internal | enabled | up    | 2017-05-02T02:22:05.000000 | -               |
| 8  | nova-compute     | open-compute01     | nova     | enabled | up    | 2017-05-02T02:22:06.000000 | -               |
| 9  | nova-compute     | open-compute02     | nova     | enabled | up    | 2017-05-02T02:22:03.000000 | -               |
| 10 | nova-compute     | open-compute03     | nova     | enabled | up    | 2017-05-02T02:22:03.000000 | -               |
| 11 | nova-compute     | open-compute04     | nova     | enabled | up    | 2017-05-02T02:22:01.000000 | -               |
+----+------------------+--------------------+----------+---------+-------+----------------------------+-----------------+

2.选择要删除的计算节点

 #删除open-compute04的ID
 [root@open-control01 ~]# nova service-delete 

3.查看网络

 #查看网络
 [root@open-control01 ~]# neutron agent-list
+--------------------------------------+--------------------+--------------------+-------------------+-------+----------------+---------------------------+
| id                                   | agent_type         | host               | availability_zone | alive | admin_state_up | binary                    |
+--------------------------------------+--------------------+--------------------+-------------------+-------+----------------+---------------------------+
| 231b4151-79ae-403c-9634-22fb84504012 | Linux bridge agent | open-compute04     |                   | :-)   | True           | neutron-linuxbridge-agent |
| 3b7808f5-c5da-495e-bd5d-53ec0e278336 | Linux bridge agent | open-compute02     |                   | :-)   | True           | neutron-linuxbridge-agent |
| 461362e0-a2fc-4c07-8f05-7438238895a3 | Linux bridge agent | open-control01     |                   | :-)   | True           | neutron-linuxbridge-agent |
| de7c1926-1934-4d95-ab35-5ec249e92f1b | Linux bridge agent | open-compute01     |                   | :-)   | True           | neutron-linuxbridge-agent |
| ecb03a62-3099-486e-a685-4a94b1891300 | DHCP agent         | open-control01     | nova              | :-)   | True           | neutron-dhcp-agent        |
| f1041be4-b6e5-41da-bbb8-73efcccf1893 | Linux bridge agent | open-compute03     |                   | :-)   | True           | neutron-linuxbridge-agent |
| fb1b72fe-3a7d-4d74-9a65-87fe082b672b | Metadata agent     | open-control01     |                   | :-)   | True           | neutron-metadata-agent    |
+--------------------------------------+--------------------+--------------------+-------------------+-------+----------------+---------------------------+

4.删除compute04的网络

 #删除网络（ID）
 [root@open-control01 ~]# neutron agent-delete 231b4151-79ae-403c--22fb84504012
 Deleted agent(s): 231b4151-79ae-403c--22fb84504012

5.停止计算节点nova、neutron相关服务

 #停止服务
 [root@open-compute04 ~]# systemctl stop libvirtd.service openstack-nova-compute.service
 [root@open-compute04 ~]# systemctl stop neutron-linuxbridge-agent

6.登录数据库

 #用nova用户登录数据库
 [root@open-control01 ~]# mysql -unova -pnovapasswd
 #使用nova库
 MariaDB [(none)]> use nova;
 #查询nova主机
 MariaDB [nova]> select host from nova.services;
+--------------------+
| host               |
+--------------------+
| open-compute01     |
| open-compute02     |
| open-compute03     |
| open-compute04     |
| open-control01     |
| open-control01     |
| open-control01     |
+--------------------+
 MariaDB [nova]> select hypervisor_hostname from compute_nodes;
+---------------------+
| hypervisor_hostname |
+---------------------+
| open-compute01      |
| open-compute02      |
| open-compute03      |
| open-compute04      |
| open-compute04      |
+---------------------+

7.删除查询的数据

 #删除
 MariaDB [nova]> delete from nova.services where host="open-compute04";
 Query OK,  row affected (0.02 sec)
 MariaDB [nova]> delete from compute_nodes where hypervisor_hostname="open-compute04";
 Query OK,  rows affected (0.01 sec)

8.检查

 #nova列表
 [root@open-control01 ~]# nova service-list 
+----+------------------+--------------------+----------+---------+-------+----------------------------+-----------------+
| Id | Binary           | Host               | Zone     | Status  | State | Updated_at                 | Disabled Reason |
+----+------------------+--------------------+----------+---------+-------+----------------------------+-----------------+
| 1  | nova-conductor   | open-control01     | internal | enabled | up    | 2017-05-02T02:43:00.000000 | -               |
| 2  | nova-scheduler   | open-control01     | internal | enabled | up    | 2017-05-02T02:42:53.000000 | -               |
| 3  | nova-consoleauth | open-control01     | internal | enabled | up    | 2017-05-02T02:42:55.000000 | -               |
| 8  | nova-compute     | open-compute01     | nova     | enabled | up    | 2017-05-02T02:42:55.000000 | -               |
| 9  | nova-compute     | open-compute02     | nova     | enabled | up    | 2017-05-02T02:42:53.000000 | -               |
| 10 | nova-compute     | open-compute03     | nova     | enabled | up    | 2017-05-02T02:42:53.000000 | -               |
+----+------------------+--------------------+----------+---------+-------+----------------------------+-----------------+
 #neutron列表
 [root@open-control01 ~]# neutron agent-list
+--------------------------------------+--------------------+--------------------+-------------------+-------+----------------+---------------------------+
| id                                   | agent_type         | host               | availability_zone | alive | admin_state_up | binary                    |
+--------------------------------------+--------------------+--------------------+-------------------+-------+----------------+---------------------------+
| 3b7808f5-c5da-495e-bd5d-53ec0e278336 | Linux bridge agent | open-compute02     |                   | :-)   | True           | neutron-linuxbridge-agent |
| 461362e0-a2fc-4c07-8f05-7438238895a3 | Linux bridge agent | open-control01     |                   | :-)   | True           | neutron-linuxbridge-agent |
| de7c1926-1934-4d95-ab35-5ec249e92f1b | Linux bridge agent | open-compute01     |                   | :-)   | True           | neutron-linuxbridge-agent |
| ecb03a62-3099-486e-a685-4a94b1891300 | DHCP agent         | open-control01     | nova              | :-)   | True           | neutron-dhcp-agent        |
| f1041be4-b6e5-41da-bbb8-73efcccf1893 | Linux bridge agent | open-compute03     |                   | :-)   | True           | neutron-linuxbridge-agent |
| fb1b72fe-3a7d-4d74-9a65-87fe082b672b | Metadata agent     | open-control01     |                   | :-)   | True           | neutron-metadata-agent    |
+--------------------------------------+--------------------+--------------------+-------------------+-------+----------------+---------------------------+

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