NoValidHost: No valid host was found. : NoValidHost_Remote: No valid host was found.

Futures_

于 2019-12-10 12:44:53 发布

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分类专栏： openstack

本文链接：https://blog.youkuaiyun.com/Futures_/article/details/103473408

在OpenStack Queens版本中遇到实例创建失败，状态显示为ERROE。问题可能由于无效主机或资源不足导致。解决方案包括删除失败实例并重新发现主机，或者检查资源提供者确保其资源充足，如内存和磁盘。调整flavor设置以不超过compute节点的资源限制，能成功创建实例。

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openstack的queens版本创建实例的时候实例状态ERROE

查看日志以下错误

2019-12-10 11:32:25.436 4805 WARNING nova.scheduler.utils [req-d3743b51-2f00-4d33-a9b3-02d96e828c93 a713722b24cc4020b12aa22890bde0c6 76ecfc994d8b4b10bc5e718536fdcd37 - default default] Failed to compute_task_build_instances: No valid host was found. 
Traceback (most recent call last):

  File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/server.py", line 226, in inner
    return func(*args, **kwargs)

  File "/usr/lib/python2.7/site-packages/nova/scheduler/manager.py", line 139, in select_destinations
    raise exception.NoValidHost(reason="")

NoValidHost: No valid host was found. 
: NoValidHost_Remote: No valid host was found.

解决方法1：删除失败状态的实例，执行命令：nova-manage cell_v2 discover_hosts --verbose 重新创建即可</