openstack创建实例报错

Question

我有一个自建Dalmatian版本的openstack集群。一个控制节点一个计算节点。网络使用ml2 openvswich。创建实例报错：
消息
Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures for instance a713361e-0029-43a3-a802-a2cc67f66421.
编码
500
详情
Traceback (most recent call last): File "/usr/lib/python3/dist-packages/nova/conductor/manager.py", line 705, in build_instances raise exception.MaxRetriesExceeded(reason=msg) nova.exception.MaxRetriesExceeded: Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures for instancea713361e-0029-43a3-a802-a2cc67f66421.

控制节点nova-conductor报错
2025-09-07 03:12:34.565 60343 ERROR nova.network.neutron [None req-0011a31e-4408-480d-891e-696af663d30c 3631995f37ce45399718c380046e63bb d02fa089a9b94586a8e89bad5a501ec1 - - default default] The [neutron] section of your nova configuration file must be configured for authentication with the networking service endpoint. See the networking service install guide for details: https://docs.openstack.org/neutron/latest/install/: nova.exception.MaxRetriesExceeded: Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures for instance a713361e-0029-43a3-a802-a2cc67f66421.
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [None req-0011a31e-4408-480d-891e-696af663d30c 3631995f37ce45399718c380046e63bb d02fa089a9b94586a8e89bad5a501ec1 - - default default] [instance: a713361e-0029-43a3-a802-a2cc67f66421] Failed to deallocate networks: neutronclient.common.exceptions.Unauthorized: Unknown auth type: None
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] Traceback (most recent call last):
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/conductor/manager.py", line 705, in build_instances
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] raise exception.MaxRetriesExceeded(reason=msg)
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] nova.exception.MaxRetriesExceeded: Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures for instance a713361e-0029-43a3-a802-a2cc67f66421.
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421]
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] During handling of the above exception, another exception occurred:
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421]
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] Traceback (most recent call last):
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/conductor/manager.py", line 448, in _cleanup_allocated_networks
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] self.network_api.deallocate_for_instance(
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 1823, in deallocate_for_instance
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] self._unbind_ports(context, ports_to_skip, neutron)
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 642, in _unbind_ports
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] port_client = get_client(context, admin=True)
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 249, in get_client
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] auth_plugin = _get_auth_plugin(context, admin=admin)
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 228, in _get_auth_plugin
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] _ADMIN_AUTH = _load_auth_plugin(CONF)
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] ^^^^^^^^^^^^^^^^^^^^^^^
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] File "/usr/lib/python3/dist-packages/nova/network/neutron.py", line 88, in _load_auth_plugin
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] raise neutron_client_exc.Unauthorized(message=err_msg)
2025-09-07 03:12:34.566 60343 ERROR nova.conductor.manager [instance: a713361e-0029-43a3-a802-a2cc67f66421] neutronclient.common.exceptions.Unauthorized: Unknown auth type: None

Answer 1

上午好☀️☀️☀️️
本答案参考通义千问

根据你提供的错误信息，可以总结出以下关键问题：

1. Nova 无法与 Neutron 进行通信：

   • 报错 The [neutron] section of your nova configuration file must be configured for authentication with the networking service endpoint.
   • 表明 Nova 配置中未正确配置 Neutron 的认证信息，导致 Nova 无法访问 Neutron API。

2. 认证失败：

   • 报错 neutronclient.common.exceptions.Unauthorized: Unknown auth type: None
   • 说明 Neutron 客户端在尝试连接时没有正确的身份验证凭据。

3. 实例创建失败：

   • 最终报错 Exceeded maximum number of retries. Exhausted all hosts available for retrying build failures...
   • 由于 Nova 无法与 Neutron 正常交互，导致实例无法创建并最终超时。

---

✅ 解决方案

一、检查并配置 Nova 的 Neutron 认证信息

1. 编辑 Nova 配置文件

找到 /etc/nova/nova.conf 文件，并确保 [neutron] 部分已正确配置：

[neutron]
auth_url = http://<neutron-controller-ip>:5000/v3
username = <neutron-user>
password = <neutron-password>
project_name = <neutron-project>
user_domain_name = Default
project_domain_name = Default

注意：

• <neutron-controller-ip> 是 Neutron 控制节点的 IP 地址。
• <neutron-user> 和 <neutron-password> 是 Neutron 用户的凭据。
• <neutron-project> 是 Neutron 对应的项目名称（通常是 service 或 demo）。

2. 重启 Nova 服务

修改后，重启 Nova 相关服务以使配置生效：

sudo systemctl restart openstack-nova-conductor
sudo systemctl restart openstack-nova-compute

---

二、确认 Neutron 服务正常运行

1. 检查 Neutron 服务状态

sudo systemctl status neutron-server

如果服务未运行，启动它：

sudo systemctl start neutron-server
sudo systemctl enable neutron-server

2. 确认 Neutron API 可访问

使用 curl 测试 Neutron API 是否可达：

curl -I http://<neutron-controller-ip>:9696

如果返回 HTTP/1.1 200 OK，表示 API 可用。

---

三、检查 OpenStack 身份认证服务（Keystone）

1. 确保 Keystone 服务正常运行

sudo systemctl status openstack-keystone

2. 检查 Neutron 用户和项目是否在 Keystone 中存在

openstack user show <neutron-user>
openstack project show <neutron-project>

如果没有，则需要在 Keystone 中创建对应的用户和项目。

---

四、检查网络配置（ML2 + Open vSwitch）

1. 确保 ML2 配置正确

检查 /etc/neutron/plugins/ml2/ml2_conf.ini 文件：

[ml2]
type_drivers = flat,vlan,gre,vxlan
tenant_network_types = vxlan
mechanism_drivers = openvswitch

2. 确保 Open vSwitch 服务正常运行

sudo systemctl status openvswitch-switch

如果未运行，启动它：

sudo systemctl start openvswitch-switch
sudo systemctl enable openvswitch-switch

---

五、检查防火墙或 SELinux 设置

1. 暂时关闭防火墙测试

sudo ufw disable

或者开放相关端口（如 5000, 9696, 80, 443 等）。

2. 关闭 SELinux（临时）

setenforce 0

如果问题解决，可考虑永久关闭或调整策略。

---

✅ 总结：关键点

1. Nova 的 Neutron 配置必须正确，否则无法与 Neutron 通信。
2. Neutron 服务必须正常运行，且 API 可达。
3. Keystone 必须正确配置了 Neutron 用户和项目。
4. Open vSwitch 和 ML2 配置必须正确。
5. 防火墙或 SELinux 可能阻止通信，需临时关闭排查。

---

✅ 示例修改后的 nova.conf 配置

[neutron]
auth_url = http://192.168.1.100:5000/v3
username = neutron
password = neutron_password
project_name = service
user_domain_name = Default
project_domain_name = Default

---

如果你仍然遇到问题，请提供以下信息以便进一步诊断：

• nova.conf 文件内容
• neutron.conf 文件内容
• keystone 中的用户和项目信息
• OpenStack 版本（Dalmatian 是一个较旧版本，建议升级到更稳定版本）