OpenStack 创建虚拟机错误： Host ‘compute1‘ is not mapped to any cell

1. 之前 Ubuntu 20.04 手动安装OpenStack只做到了 Networking service Installation Guide 这一步，然后就不继续了，以为最困难的都过去了

2. 今天临时想要创建一个虚拟机，发现从命令行方式和 DashBoard 创建虚拟机，都报错了！

   Host ‘compute2’ is not mapped to any cell

3. 从 DashBoard 查看错误原因
   

4. 分析：前面其他错误修改后，没有重新同步发现 compute 节点
   所以直接重新来过

   root@controller:/home/dhbm# nova-manage cell_v2 discover_hosts --verbose

    Found 2 cell mappings.
    Skipping cell0 since it does not contain hosts.
    Getting computes from cell 'cell1': acff5521-7a28-4a1d-bf04-6354dc5884eb
    Checking host mapping for compute host 'compute2': 0186d682-fbda-4c55-a6b4-950fa35ca6e2
    Creating host mapping for compute host 'compute2': 0186d682-fbda-4c55-a6b4-950fa35ca6e2
    Found 1 unmapped computes in cell: acff5521-7a28-4a1d-bf04-6354dc5884eb
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   root@controller:/home/dhbm# openstack compute service list --service nova-compute

    +----+--------------+------------+------+---------+-------+----------------------------+
    | ID | Binary       | Host       | Zone | Status  | State | Updated At                 |
    +----+--------------+------------+------+---------+-------+----------------------------+
    |  5 | nova-compute | controller | nova | enabled | up    | 2022-12-06T06:26:07.000000 |
    | 13 | nova-compute | compute2   | nova | enabled | up    | 2022-12-06T06:26:10.000000 |
    +----+--------------+------------+------+---------+-------+----------------------------+
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   再次创建虚拟机，就 OK了！

   

后记

保险起见，以上修改调整后，一定重启一下对应服务

service nova-api restart
service nova-scheduler restart
service nova-conductor restart
service nova-novncproxy restart

HTTP 服务也要重启

systemctl restart apache2

比如：我这里直接继续创建虚拟机，就报错了

消息
Build of instance aec7299c-8928-44a3-a486-5d2521869bf3 aborted: The request you have made requires authentication. (HTTP 401) (Request-ID: req-9adf4910-4225-494d-9179-0e03317fc513)