Kubernetes法兰绒荚得到错误的networking
在一个pod中运行的法兰绒获取了错误的子网，networking连接不起来，症状是法兰绒从10.105.0.0/16开始分配/ 24。 它应该从10.105.5.128/21分配/ 26。 谢谢你的帮助。
这里是细节：
/usr/bin/kubeadm init \ --kubernetes-version v1.7.5 \ --pod-network-cidr 10.105.5.128/21 \ --service-cidr 10.105.5.136/21 \ --token XXXXXXXXXXX kube-flannel-rbac.yml是在kube-flannel.yml中加载后才从kube-flannel.yml中修改的（SubenetLen和Network）
{ "Network": "10.105.5.128/21", "SubnetLen": 26, "Backend": { "Type": "vxlan" } }
DNS在systemd文件中设置为：
--cluster-dns=10.105.5.136.10
使用Ubuntu 16.04 LTS和股票内核
这里是docker daemon.json文件：
{ "hosts":[ "fd://", "0.0.0.0" ], "ip-masq":false, "experimental": true, "registry-mirrors": [ "http://hub.xyz.com" ], "insecure-registries": [ "http://hub.xyz.com" ], "tls": true, "tlsverify": true, "tlscacert":"/etc/docker/ca.pem", "tlscert":"/etc/docker/cert.pem", "tlskey":"/etc/docker/key.pem" }
所有的kuberentes组件都是从Ubuntu的k8s仓库安装1.7.5
这里是kube-flannel容器的日志：
I0926 03:29:10.214198 89 main.go:446] Determining IP address of default interface I0926 03:29:10.216166 89 main.go:459] Using interface with name eth0 and address 10.105.5.12 I0926 03:29:10.216261 89 main.go:476] Defaulting external address to interface address (10.105.5.12) I0926 03:29:10.242216 89 kube.go:283] Starting kube subnet manager I0926 03:29:10.242055 89 kube.go:130] Waiting 10m0s for node controller to sync I0926 03:29:11.242864 89 kube.go:137] Node controller sync successful I0926 03:29:11.242957 89 main.go:226] Created subnet manager: Kubernetes Subnet Manager - kube-m2.XXXXX.com I0926 03:29:11.242969 89 main.go:229] Installing signal handlers I0926 03:29:11.243984 89 main.go:330] Found network config - Backend type: vxlan I0926 03:29:11.288902 89 ipmasq.go:51] Adding iptables rule: -s 10.105.0.0/21 -d 10.105.0.0/21 -j RETURN I0926 03:29:11.306692 89 ipmasq.go:51] Adding iptables rule: -s 10.105.0.0/21 ! -d 224.0.0.0/4 -j MASQUERADE I0926 03:29:11.314413 89 ipmasq.go:51] Adding iptables rule: ! -s 10.105.0.0/21 -d 10.105.0.0/24 -j RETURN I0926 03:29:11.323229 89 ipmasq.go:51] Adding iptables rule: ! -s 10.105.0.0/21 -d 10.105.0.0/21 -j MASQUERADE I0926 03:29:11.329676 89 main.go:279] Wrote subnet file to /run/flannel/subnet.env I0926 03:29:11.329746 89 main.go:284] Finished starting backend. I0926 03:29:11.329829 89 vxlan_network.go:56] Watching for L3 misses I0926 03:29:11.329903 89 vxlan_network.go:64] Watching for new subnet leases
你以前做过kubeadm重设吗？ 如果是，请使用ip link检查ip link
并检查法兰绒networking是否正确，如果没有，请使用ip link delete cni0 ip link delete flannel.1清理networking设置
祝你好运！