红帽全球峰会第 7 章 overcloud 准备的初始步骤
您必须完成一些初始步骤，以便为 overcloud 升级做准备。
7.1. 准备 overcloud 服务停机时间
复制链接链接已复制到粘贴板!
overcloud 升级过程在关键点禁用主 control plane 服务。当达到这些关键点时，您无法使用任何 overcloud 服务来创建新的资源。在升级过程中，overcloud 运行的工作负载会保持活跃状态，这意味着在升级 control plane 时实例继续运行。在升级 Compute 节点期间，这些工作负载可以实时迁移到已升级的 Compute 节点。
务必要规划维护窗口，以确保在升级过程中无法访问 overcloud 服务。
受 overcloud 升级的影响
- OpenStack Platform 服务
不受 overcloud 升级的影响
- 升级过程中运行的实例
- Ceph 存储 OSD（实例的后端存储）
- Linux 网络
- Open vSwitch 网络
- undercloud
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