2018-06-14 23:34:03 +08:00
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# kube-router 网络组件
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kube-router是一个简单、高效的网络插件，它提供一揽子解决方案：
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- 基于GoBGP 提供Pod 网络互联（Routing）
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- 使用ipsets优化的iptables 提供网络策略支持（Firewall/NetworkPolicy）
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2019-05-27 00:04:00 +08:00
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- 基于IPVS/LVS 提供高性能服务代理（Service Proxy）(注：由于 k8s 新版本中 ipvs 已可用，因此这里不选择启用kube-router基于ipvs的service proxy)
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2018-06-14 23:34:03 +08:00
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更多介绍请前往`https://github.com/cloudnativelabs/kube-router`
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## 配置
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2018-06-19 21:45:17 +08:00
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本项目提供多种网络插件可选，如果需要安装kube-router，请在/etc/ansible/hosts文件中设置变量 `CLUSTER_NETWORK="kube-router"`，更多设置请查看`roles/kube-router/defaults/main.yml`
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2018-06-14 23:34:03 +08:00
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- kube-router需要在所有master节点和node节点安装
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## 安装
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- 单步安装已经集成：`ansible-playbook 90.setup.yml`
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- 分步安装请执行：`ansible-playbook 06.network.yml`
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## 验证
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- 1.pod间网络联通性：略
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- 2.host路由表
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``` bash
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# master上路由
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root@master1:~$ ip route
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...
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172.20.1.0/24 via 192.168.1.2 dev ens3 proto 17
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172.20.2.0/24 via 192.168.1.3 dev ens3 proto 17
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...
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# node3上路由
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root@node3:~$ ip route
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...
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172.20.0.0/24 via 192.168.1.1 dev ens3 proto 17
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172.20.1.0/24 via 192.168.1.2 dev ens3 proto 17
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172.20.2.0/24 dev kube-bridge proto kernel scope link src 172.20.2.1
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...
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```
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- 3.bgp连接状态
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``` bash
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# master上
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root@master1:~$ netstat -antlp|grep router|grep LISH|grep 179
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tcp 0 0 192.168.1.1:179 192.168.1.3:58366 ESTABLISHED 26062/kube-router
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tcp 0 0 192.168.1.1:42537 192.168.1.2:179 ESTABLISHED 26062/kube-router
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# node3上
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root@node3:~$ netstat -antlp|grep router|grep LISH|grep 179
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tcp 0 0 192.168.1.3:58366 192.168.1.1:179 ESTABLISHED 18897/kube-router
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tcp 0 0 192.168.1.3:179 192.168.1.2:43928 ESTABLISHED 18897/kube-router
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```
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2019-05-27 00:04:00 +08:00
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- 4.NetworkPolicy有效性，验证参照[这里](../../guide/networkpolicy.md)
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2018-06-14 23:34:03 +08:00
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- 5.ipset列表查看
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``` bash
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2018-06-15 10:52:59 +08:00
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$ ipset list
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2018-06-14 23:34:03 +08:00
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...
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Name: kube-router-pod-subnets
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Type: hash:net
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Revision: 6
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Header: family inet hashsize 1024 maxelem 65536 timeout 0
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Size in memory: 672
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References: 2
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Members:
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172.20.1.0/24 timeout 0
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172.20.2.0/24 timeout 0
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172.20.0.0/24 timeout 0
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Name: kube-router-node-ips
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Type: hash:ip
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Revision: 4
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Header: family inet hashsize 1024 maxelem 65536 timeout 0
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Size in memory: 416
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References: 1
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Members:
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192.168.1.1 timeout 0
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192.168.1.2 timeout 0
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192.168.1.3 timeout 0
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...
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```
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