红帽全球峰会OpenShift Container Storage is now OpenShift Data Foundation starting with version 4.9.
第 2 章 准备部署启用了灾难恢复功能的存储集群
2.1. 启用 Metro-DR 的要求
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- 确保您在三个不同的区中至少有三个 OpenShift Container Platform master 节点。三个区域中的每一区域中有一个主节点。
- 确保至少四个 OpenShift Container Platform worker 节点分布在两个数据区中。
- 要在裸机上扩展集群，您必须使用 SSD 驱动器作为 OpenShift Container Platform master 节点的 root 驱动器。
- 确保每个节点已预先标记其 zone 标签。如需更多信息，请参阅 将拓扑区标签应用到 OpenShift Container Platform 节点 部分。
- Metro-DR 解决方案设计为在区域之间的延迟不超过 2 毫秒时部署（最大的 RTT 为 4毫秒）。如果您计划以更高的延迟进行部署，请联系红帽客户支持。
注意
因为有冲突的扩展逻辑，您无法同时启用灵活的扩展和仲裁程序。通过灵活的扩展，您可以一次向 OpenShift Container Storage 集群添加一个节点。但是，在仲裁集群中，您需要在每个 2 个数据区中添加一个节点。
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