Flannel dial tcp X.X.X.X i/o timeout

E0826 15:59:20.782550       1 main.go:229] Failed to create SubnetManager: error retrieving pod spec for 'kube-flannel/kube-flannel-ds-k79vs': Get "https://10.0.0.1:443/api/v1/namespaces/kube-flannel/pods/kube-flannel-ds-k79vs": dial tcp 10.0.0.1:443: i/o timeout

 这种报错一般是 集群网段设置错误造成的

查看kube-flannel.yaml

 

step1 检查 kube-controller-manager.conf  文件 --cluster-cidr=10.244.0.0/16

[root@k8s-master01 ~]# cat  /opt/kubernetes/cfg/kube-controller-manager.conf 
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \
--v=2 \
--log-dir=/opt/kubernetes/logs \
--leader-elect=true \
--bind-address=127.0.0.1 \
--kubeconfig=/opt/kubernetes/cfg/kube-controller-manager.kubeconfig \
--allocate-node-cidrs=true \
--cluster-cidr=10.244.0.0/16 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--cluster-signing-duration=87600h0m0s"
 

step2 检查 kube-proxy.conf  clusterCIDR 为10.244.0.0/16

[root@k8s-node01 ~]# cat /opt/kubernetes/cfg/kube-proxy-config.yml 
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
        kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s-node01
clusterCIDR: 10.244.0.0/16
mode: ipvs