Openstack控制节点删除计算节点的方法

在控制节点Controller的操作：删除计算节点名称为compute
1.查看计算主机及服务相关：

[root@controller ~]# openstack host list

[root@controller ~]# nova service-list

计算节点compute的State状态是down，但Status状态还是enabled可用。
2.修改compute为不可用状态。

[root@controller ~]# nova service-disable bf635c36-2b14-44bc-aeaa-fff05d80c15b

查看是否修改成功
[root@controller ~]# nova service-list

3.在数据库（nova）中清理
[root@controller ~]# mysql -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or g.
Your MariaDB connection id is 980
Server version: 10.1.20-MariaDB MariaDB Server

Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.

MariaDB [(none)]> use nova
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
MariaDB [nova]> delete from nova.services where host="compute";
Query OK, 1 row affected (0.01 sec)

MariaDB [nova]> delete from compute_nodes where hypervisor_hostname="compute";
Query OK, 0 rows affected (0.00 sec)

6 rows in set (0.00 sec)

1 row in set (0.00 sec)

4.校验

[root@controller ~]# openstack host list

[root@controller ~]# nova service-list

再次查看计算节点，就发现compute已经被删除了。