Rancher 单机创建三节点master-后台界面连接master偶尔报错

大家好:
rancher版本:2.5.11 单节点部署;
用rancher安装三节点master,若干节点worker;服务器是centos7.9,内核版本:3.10.0-1160.62.1.el7.x86_64;docker版本:20.10.16;安装的k8s默认版本:v1.20.15;
部署了一段时间后,rancher界面经常提示下列错误,连接master的api-server超时,每次重启能恢复;
Cluster health check failed: Failed to communicate with API server during namespace check: Get “https://10.192.126.25:6443/api/v1/namespaces/kube-system?timeout=45s”: write tcp 172.17.0.2:443->172.17.0.1:61415: i/o timeout

rancher的日志:
2022/12/12 20:10:39 [ERROR] error syncing ‘p-8wdg8/pl-b6ntr’: handler project-logging-configsyncer: get secret cattle-logging:rancher-logging-fluentd-ssl f
ailed: Get “https://10.192.126.25:6443/api/v1/namespaces/cattle-logging/secrets/rancher-logging-fluentd-ssl”: write tcp 172.17.0.2:443->172.17.0.1:61415: i
/o timeout, requeuing
2022/12/12 20:12:28 [ERROR] error syncing ‘p-8wdg8/pl-b6ntr’: handler project-logging-configsyncer: get secret cattle-logging:rancher-logging-fluentd-ssl f
ailed: Get “https://10.192.126.25:6443/api/v1/namespaces/cattle-logging/secrets/rancher-logging-fluentd-ssl”: write tcp 172.17.0.2:443->172.17.0.1:61415: i
/o timeout, requeuing
2022/12/13 01:12:19 [ERROR] error syncing ‘c-hdl7f/scheduler-system-service’: handler cluster-alert-rule-deployer: clean up alertmanager failed, Delete “ht
tps://10.192.126.25:6443/api/v1/namespaces/cattle-prometheus/secrets/alertmanager-cluster-alerting”: write tcp 172.17.0.2:443->172.17.0.1:61415: i/o timeou
t, requeuing
2022/12/13 01:12:19 [ERROR] error syncing ‘c-hdl7f/high-number-of-leader-changes’: handler cluster-alert-rule-deployer: clean up alertmanager failed, Delet
e “https://10.192.126.25:6443/api/v1/namespaces/cattle-prometheus/secrets/alertmanager-cluster-alerting”: write tcp 172.17.0.2:443->172.17.0.1:61415: i/o t
imeout, requeuing