我使用kubeadm创建了
kubernetes集群。 kubeadm init
我收到错误消息/var/log/messages。
Oct 20 10:09:52 aws08 kubelet: I1020 10:09:52.015921 7116
docker_manager.go:1787] DNS ResolvConfPath exists:
/var/lib/docker/containers/717adf7a8481637ac20a9ba103d8f97635a88bf05f18bd4299f0d164e48f2920/resolv.conf.
Will attempt to add ndots option: options ndots:5 Oct 20 10:09:52
aws08 kubelet: I1020 10:09:52.015963 7116 docker_manager.go:2121]
Calling network plugin cni to setup pod for
kube-dns-2247936740-cjij4_kube-system(3b296413-96aa-11e6-8c40-02fff663a168)
Oct 20 10:09:52 aws08 kubelet: E1020 10:09:52.015982 7116
docker_manager.go:2127] Failed to setup network for pod
"kube-dns-2247936740-cjij4_kube-system(3b296413-96aa-11e6-8c40-02fff663a168)"
using network plugins "cni": cni config unintialized; Skipping pod Oct
20 10:09:52 aws08 kubelet: I1020 10:09:52.018824 7116
docker_manager.go:1492] Killing container
"717adf7a8481637ac20a9ba103d8f97635a88bf05f18bd4299f0d164e48f2920
kube-system/kube-dns-2247936740-cjij4" with 30 second grace period
DNS pod 失败：
kube-system kube-dns-2247936740-j5rtc 0/3 ContainerCreating 21 1h
如果我禁用CNI，则 DNS pod 正在运行。但是 DNS 的问题仍然存在。
禁用cni的方法是注释掉这KUBELET_NETWORK_ARGS行/etc/systemd/system/kubelet.service.d/10-kubeadm.conf，重启kubelet服务
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--kubeconfig=/etc/kubernetes/kubelet.conf --require-kubeconfig=true"
Environment="KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true"
# Environment="KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
Environment="KUBELET_DNS_ARGS=--cluster-dns=100.64.0.10 --cluster-domain=cluster.local"
Environment="KUBELET_EXTRA_ARGS=--v=4"
ExecStart=
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_SYSTEM_PODS_ARGS $KUBELET_NETWORK_ARGS $KUBELET_DNS_ARGS $KUBELET_EXTRA_ARGS
其次是：
sudo systemctl 重启 kubelet