一、
error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"
解决：
vi /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
update KUBELET_CGROUP_ARGS=--cgroup-driver=systemd to KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs
restart kubelet
二、
Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")
解决：export KUBECONFIG=/etc/kubernetes/kubelet.conf
三、Failed to request cluster info, will try again: [Get https://192.168.57.4:6443/api/v1/namespaces/kube-public/configmaps/cluster-info: x509: certificate has expired or is not yet valid]
解决：同步master和node的时间
四、The connection to the server localhost:8080 was refused - did you specify the right host or port?
解决：
export KUBECONFIG=/etc/kubernetes/admin.conf
定义在6443端口 而不是8080
五、runtime network not ready: NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized
解决：
1.删除/etc/systemd/system/kubelet.service.d/10-kubeadm.conf里最后一行里的$KUBELET_NETWORK_ARGS
2.重启kubelet systemctl enable kubelet && systemctl start kubelet
3.重新加入 kubeadm reset || kubeadm join ….
六、pod ContainerCreating Or Error
default po/httpd-68f9d7648d-5f9gt 0/1 ContainerCreating 0 1m <none> tensorflow0
describe一下 说sadbox创建失败。
-
Warning FailedCreatePodSandBox 20s (x12 over 54s) kubelet, tensorflow0 Failed create pod sandbox. -
Normal SandboxChanged 20s (x12 over 53s) kubelet, tensorflow0 Pod sandbox changed, it will be killed and re-created
解决：一般归结为网络问题，查看或重启网络（calico或flanneld）
七、kube-dns 启动不成功
kube-system po/kube-dns-6f4fd4bdf-p5x4k 0/3 Pending 0 14m
①修改 /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
删除$KUBELET_NETWORK_ARGS （别这么做，不推荐）
②dns异常，kubeadm reset重来，试试先初始化master，然后配置calico或flannel网络，ok了以后，再加入其它机器
重启
systemctl daemon-reload && systemctl restart kubelet
kubeadm reset
kubeadm init --kubernetes-version=v1.9.0 --pod-network-cidr=10.244.0.0/16