--- title: Node子网 description: "在Kubernetes的网络规范中，要求Node可以和所有的Pod直接通信。为了达到这个目的Kube-OVN创建了一个join子网，并在每个Node节点创建了一块虚拟网卡ovn0接入join子网，通过该网络完成主机和Pod之间的网络互通。" url: https://www.hikunpeng.com/document/detail/zh/kunpengcpfs/ecosystemEnable/Kubernetes/kunpengkubeovn_06_0024.html sourcePath: /source/zh/kunpengcpfs/ecosystemEnable/Kubernetes/kunpengkubeovn_06_0024.html indexId: 728fd8d6981b05381c35c7150a5541346a1eff714440f5d1c255df2de093d18677 --- # Node子网 在Kubernetes的网络规范中，要求Node可以和所有的Pod直接通信。为了达到这个目的Kube-OVN创建了一个join子网，并在每个Node节点创建了一块虚拟网卡ovn0接入join子网，通过该网络完成主机和Pod之间的网络互通。 如需更改Node子网配置，则需要在安装步骤时指定，参考配置内置网络章节。 - 查看Node子网。 1 kubectl get subnet join -o yaml 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 apiVersion: kubeovn.io/v1 kind: Subnet metadata: creationTimestamp: "2020-06-28T06:42:32Z" finalizers: - kube-ovn-controller generation: 2 name: join resourceVersion: "749434" selfLink: /apis/kubeovn.io/v1/subnets/join uid: 3179fdc6-56a9-4211-a4c2-d922f4463adb spec: cidrBlock: 100.64.0.0/16 default: false excludeIps: - 100.64.0.1 gateway: 100.64.0.1 gatewayNode: "" gatewayType: distributed natOutgoing: false private: false protocol: IPv4 provider: ovn underlayGateway: false status: activateGateway: "" availableIPs: 65530 conditions: - lastTransitionTime: "2020-06-28T06:42:33Z" lastUpdateTime: "2020-06-28T06:42:33Z" reason: ResetLogicalSwitchAclSuccess status: "True" type: Validated - lastTransitionTime: "2020-06-28T06:42:33Z" lastUpdateTime: "2020-06-28T06:42:33Z" reason: ResetLogicalSwitchAclSuccess status: "True" type: Ready - lastTransitionTime: "2020-06-28T06:42:33Z" lastUpdateTime: "2020-06-28T06:42:33Z" message: Not Observed reason: Init status: Unknown type: Error usingIPs: 3 - 在Node节点查看ovn0网卡。 1 ifconfig ovn0 1 2 3 4 5 6 7 8 ovn0: flags=4163 mtu 1400 inet 100.64.0.2 netmask 255.255.0.0 broadcast 100.64.255.255 inet6 fe80::200:ff:fec6:936d prefixlen 64 scopeid 0x20 ether 00:00:00:c6:93:6d txqueuelen 1000 (Ethernet) RX packets 5673864 bytes 530785977 (506.1 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 5243874 bytes 8069050878 (7.5 GiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0