nova list 的一些实用使用方法

[root@cc ~]# nova help list
usage: nova list [--reservation-id <reservation-id>] [--ip <ip-regexp>]
                 [--ip6 <ip6-regexp>] [--name <name-regexp>]
                 [--instance-name <name-regexp>] [--status <status>]
                 [--flavor <flavor>] [--image <image>] [--host <hostname>]
                 [--all-tenants [<0|1>]] [--tenant [<tenant>]]
                 [--fields <fields>]

List active servers.

Optional arguments:
  --reservation-id <reservation-id>
                        Only return instances that match reservation-id.
  --ip <ip-regexp>      Search with regular expression match by IP address
                        (Admin only).
  --ip6 <ip6-regexp>    Search with regular expression match by IPv6 address
                        (Admin only).
  --name <name-regexp>  Search with regular expression match by name
  --instance-name <name-regexp>
                        Search with regular expression match by instance name
                        (Admin only).
  --status <status>     Search by server status
  --flavor <flavor>     Search by flavor name or ID
  --image <image>       Search by image name or ID
  --host <hostname>     Search instances by hostname to which they are
                        assigned (Admin only).
  --all-tenants [<0|1>]
                        Display information from all tenants (Admin only).
  --tenant [<tenant>]   Display information from single tenant (Admin only).
  --fields <fields>     Comma-separated list of fields to display. Use the
                        show command to see which fields are available.
                        

一般的用法：

[root@cc ~]# nova list
+--------------------------------------+----------+-----------+------------+-------------+---------------+
| ID                                   | Name     | Status    | Task State | Power State | Networks      |
+--------------------------------------+----------+-----------+------------+-------------+---------------+
| 14e9c941-1e3c-4848-9d07-7f4624831d03 | INSTANCE | ACTIVE    | None       | Running     | test=10.0.0.5 |
| 9d0daae5-38dc-49c2-9f89-0a3d341889db | INSTANCE | ACTIVE    | None       | Running     | test=10.0.0.2 |
| b8b71597-d2af-42ed-abe7-b994f63570bb | INSTANCE | SUSPENDED | None       | Shutdown    | test=10.0.0.4 |
+--------------------------------------+----------+-----------+------------+-------------+---------------+

比较实用的用法：
显示指定节点上的虚拟机

[root@cc ~]# nova list --host node_1	
+--------------------------------------+----------+--------+------------+-------------+---------------+
| ID                                   | Name     | Status | Task State | Power State | Networks      |
+--------------------------------------+----------+--------+------------+-------------+---------------+
| 9d0daae5-38dc-49c2-9f89-0a3d341889db | INSTANCE | ACTIVE | None       | Running     | test=10.0.0.2 |
+--------------------------------------+----------+--------+------------+-------------+---------------+

显示指定ip的虚拟机

[root@cc ~]# nova list --ip 10.0.0.2
+--------------------------------------+----------+--------+------------+-------------+---------------+
| ID                                   | Name     | Status | Task State | Power State | Networks      |
+--------------------------------------+----------+--------+------------+-------------+---------------+
| 9d0daae5-38dc-49c2-9f89-0a3d341889db | INSTANCE | ACTIVE | None       | Running     | test=10.0.0.2 |
+--------------------------------------+----------+--------+------------+-------------+---------------+

显示使用指定镜像的虚拟机

[root@cc ~]# nova list --image c3f763fd-63c8-4dd8-97c9-4f5f4a39d6ab
+--------------------------------------+----------+-----------+------------+-------------+---------------+
| ID                                   | Name     | Status    | Task State | Power State | Networks      |
+--------------------------------------+----------+-----------+------------+-------------+---------------+
| 14e9c941-1e3c-4848-9d07-7f4624831d03 | INSTANCE | ACTIVE    | None       | Running     | test=10.0.0.5 |
| b8b71597-d2af-42ed-abe7-b994f63570bb | INSTANCE | SUSPENDED | None       | Shutdown    | test=10.0.0.4 |
+--------------------------------------+----------+-----------+------------+-------------+---------------+

显示使用指定规格的虚拟机

[root@cc ~]# nova list --flavor 2
+--------------------------------------+----------+-----------+------------+-------------+---------------+
| ID                                   | Name     | Status    | Task State | Power State | Networks      |
+--------------------------------------+----------+-----------+------------+-------------+---------------+
| 14e9c941-1e3c-4848-9d07-7f4624831d03 | INSTANCE | ACTIVE    | None       | Running     | test=10.0.0.5 |
| 9d0daae5-38dc-49c2-9f89-0a3d341889db | INSTANCE | ACTIVE    | None       | Running     | test=10.0.0.2 |
+--------------------------------------+----------+-----------+------------+-------------+---------------+

显示指定状态的虚拟机

[root@cc ~]# nova list --status active
+--------------------------------------+----------+--------+------------+-------------+---------------+
| ID                                   | Name     | Status | Task State | Power State | Networks      |
+--------------------------------------+----------+--------+------------+-------------+---------------+
| 14e9c941-1e3c-4848-9d07-7f4624831d03 | INSTANCE | ACTIVE | None       | Running     | test=10.0.0.5 |
| 9d0daae5-38dc-49c2-9f89-0a3d341889db | INSTANCE | ACTIVE | None       | Running     | test=10.0.0.2 |
+--------------------------------------+----------+--------+------------+-------------+---------------+

显示虚拟机并且显示指定字段

[root@cc ~]# nova list --fields <字段>

我平时常用的一般有instance_name、host、image、flavor、vm_state等，非常实用，比如想去计算节点virsh命令里操作虚拟机，使用nova list --fields instance_name能够很快的得到虚拟机id与instance_name之间的对应关系。

[root@cc ~]# nova list --fields instance_name
+--------------------------------------+-------------------+
| ID                                   | Instance Name     |
+--------------------------------------+-------------------+
| b8b71597-d2af-42ed-abe7-b994f63570bb | instance-00000009 |
| 9d0daae5-38dc-49c2-9f89-0a3d341889db | instance-0000000a |
| 14e9c941-1e3c-4848-9d07-7f4624831d03 | instance-0000000b |
+--------------------------------------+-------------------+