DNS Pod在kubeadm初始化后失败

Question

我正在运行kubeadm init --pod-network-cidr=10.244.0.0/16来部署k8s。之后，我正在运行kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml安装法兰绒Pod网络。紧接其后，我启动并运行了核心dns荚，但是日志说：

[INFO] plugin/reload: Running configuration MD5 = 4e235fcc3696966e76816bcd9034ebc7
CoreDNS-1.6.5
linux/amd64, go1.13.4, c2fd1b2
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:60266->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:40761->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:50495->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:41244->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:37152->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:35273->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:36979->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:56856->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:59105->172.20.0.1:53: i/o timeout
[ERROR] plugin/errors: 2 2304295940078007789.7023563928002468477. HINFO: read udp 10.244.1.3:42423->172.20.0.1:53: i/o timeout

我在做什么错？我该如何纠正？

Answer 1

Core dns pods仅取决于您所用的法兰绒网络插件。如果法兰绒出现任何问题，则dns pod不能正常启动。尝试通过执行以下命令来安装法兰绒的最新版本，如法兰绒github ReadMe.md中所述。

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml