红帽全球峰会1.3. 已知问题
查看 Red Hat Advanced Cluster Management for Kubernetes 中的已知问题。以下列表包含本发行版本的已知问题，或从上一版本中继承的问题。对于 Red Hat OpenShift Container Platform 集群，请参阅 OpenShift Container Platform 已知问题。
1.3.1. 已知的与安装相关的问题
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1.3.1.1. OpenShift Container Platform 集群升级失败的状态
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当 OpenShift Container Platform 集群处于升级阶段时，集群 Pod 会被重启，并且集群可能在大约 1 到 5 分钟之内会处于升级失败状态。这个行为是正常的，在几分钟后自动解决。
1.3.1.2. 安装过程中必须不存在证书管理器
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在安装 Red Hat Advanced Cluster Management for Kubernetes 时，不能存在证书管理器。
当集群中已存在证书管理器时，Red Hat Advanced Cluster Management for Kubernetes 安装会失败。
要解决这个问题，请运行以下命令确认集群中是否存在证书管理器：
kubectl get crd | grep certificates.certmanager
kubectl get crd | grep certificates.certmanager
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