红帽全球峰会1.2. 已知的可能会阻止升级的问题
查看以下已知问题列表，它们可能会影响从 OpenStack Platform 15 升级到 16.1 的已知问题。
- BZ39）5220 - 使用 OVN 提供商网络的实例的网络通信问题
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从早期版本(16.0.x 或 16.1.x)对 16.1.3 的更新可能会导致因为 Open Virtual Network (OVN)的数据库问题导致网络中断。执行次要版本更新时，您通常会在 Compute 节点前更新 Controller 节点。更新 Controller 节点时，director 会将
ovndb-north数据库模式更新至最新版本。Compute 节点上的ovn-controller服务无法解释ovndb-north数据库模式的较新版本，且无法获取实例的正确网络流。要最小化网络中断的临时解决方案，您必须在运行openstack overcloud update run命令和运行openstack overcloud update prepare命令后更新 Compute 节点上的ovn_controller服务。如需更多信息，请参阅 "OVN update in 16.1 临时解决方案" 知识库文章。红帽旨在在以后的 16.1 次版本更新中解决这个问题。 - BZ the the2404 - 并行重启节点，同时保持仲裁会导致意外的节点关闭
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在解决此问题之前，对于基于可组合角色的节点，您必须先更新
Database角色，然后再更新Controller,Messaging,Compute,Ceph和其他角色。
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