openstack-nova-compute Startup Error

Symptom

Error log: AttributeError: module 'lib' has no attribute 'X509_V_FLAG_NOTIFY_POLICY'. Did you mean: 'X509_V_FLAG_EXPLICIT_POLICY'?

Root Cause Analysis

Version mismatch or incompatibility between OpenSSL and its related components.

Solution

Reinstall pyopenssl.

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