---
title: openstack-nova-compute启动报错
description: "报错日志：AttributeError: module 'lib' has no attribute 'X509_V_FLAG_NOTIFY_POLICY'. Did you mean: 'X509_V_FLAG_EXPLICIT_POLICY'?"
url: https://www.hikunpeng.com/document/detail/zh/kunpengcctrustzone/tee/cVMcont/kunpengtee_16_0071.html
sourcePath: /source/zh/kunpengcctrustzone/tee/cVMcont/kunpengtee_16_0071.html
indexId: b23492f4a3c5379c30f3bc93643fe23e115354cef00a624434454608267a82a165
---
# openstack-nova-compute启动报错

#### 问题现象

报错日志：AttributeError: module 'lib' has no attribute 'X509_V_FLAG_NOTIFY_POLICY'. Did you mean: 'X509_V_FLAG_EXPLICIT_POLICY'?


#### 根本原因分析

OpenSSL及相关组件版本出错。


#### 解决方案

重装pyopenssl。

```
pip install pyopenssl==23.2.0
yum install python3-cryptography-35.0.0-1.oe2403sp3 python3-pyOpenSSL-20.0.1-2.oe2403sp3
```