mirror of https://github.com/easzlab/kubeasz.git
108 lines
3.1 KiB
Markdown
108 lines
3.1 KiB
Markdown
# kube-router 网络组件
|
||
|
||
kube-router是一个简单、高效的网络插件，它提供一揽子解决方案：
|
||
- 基于GoBGP 提供Pod 网络互联（Routing）
|
||
- 使用ipsets优化的iptables 提供网络策略支持（Firewall/NetworkPolicy）
|
||
- 基于IPVS/LVS 提供高性能服务代理（Service Proxy）
|
||
|
||
更多介绍请前往`https://github.com/cloudnativelabs/kube-router`
|
||
|
||
## 配置
|
||
|
||
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"`
|
||
|
||
- kube-router需要在所有master节点和node节点安装
|
||
|
||
## 安装
|
||
|
||
- 单步安装已经集成：`ansible-playbook 90.setup.yml`
|
||
- 分步安装请执行：`ansible-playbook 06.network.yml`
|
||
|
||
## 验证
|
||
|
||
- 1.pod间网络联通性：略
|
||
|
||
- 2.host路由表
|
||
|
||
``` bash
|
||
# master上路由
|
||
root@master1:~$ ip route
|
||
...
|
||
172.20.1.0/24 via 192.168.1.2 dev ens3 proto 17
|
||
172.20.2.0/24 via 192.168.1.3 dev ens3 proto 17
|
||
...
|
||
|
||
# node3上路由
|
||
root@node3:~$ ip route
|
||
...
|
||
172.20.0.0/24 via 192.168.1.1 dev ens3 proto 17
|
||
172.20.1.0/24 via 192.168.1.2 dev ens3 proto 17
|
||
172.20.2.0/24 dev kube-bridge proto kernel scope link src 172.20.2.1
|
||
...
|
||
```
|
||
|
||
- 3.bgp连接状态
|
||
|
||
``` bash
|
||
# master上
|
||
root@master1:~$ netstat -antlp|grep router|grep LISH|grep 179
|
||
tcp 0 0 192.168.1.1:179 192.168.1.3:58366 ESTABLISHED 26062/kube-router
|
||
tcp 0 0 192.168.1.1:42537 192.168.1.2:179 ESTABLISHED 26062/kube-router
|
||
|
||
# node3上
|
||
root@node3:~$ netstat -antlp|grep router|grep LISH|grep 179
|
||
tcp 0 0 192.168.1.3:58366 192.168.1.1:179 ESTABLISHED 18897/kube-router
|
||
tcp 0 0 192.168.1.3:179 192.168.1.2:43928 ESTABLISHED 18897/kube-router
|
||
|
||
```
|
||
|
||
- 4.NetworkPolicy有效性，验证参照[这里](guide/networkpolicy.md)
|
||
|
||
- 5.ipset列表查看
|
||
|
||
``` bash
|
||
$ ipset list
|
||
...
|
||
Name: kube-router-pod-subnets
|
||
Type: hash:net
|
||
Revision: 6
|
||
Header: family inet hashsize 1024 maxelem 65536 timeout 0
|
||
Size in memory: 672
|
||
References: 2
|
||
Members:
|
||
172.20.1.0/24 timeout 0
|
||
172.20.2.0/24 timeout 0
|
||
172.20.0.0/24 timeout 0
|
||
|
||
Name: kube-router-node-ips
|
||
Type: hash:ip
|
||
Revision: 4
|
||
Header: family inet hashsize 1024 maxelem 65536 timeout 0
|
||
Size in memory: 416
|
||
References: 1
|
||
Members:
|
||
192.168.1.1 timeout 0
|
||
192.168.1.2 timeout 0
|
||
192.168.1.3 timeout 0
|
||
...
|
||
```
|
||
|
||
- 6.ipvs虚拟服务器查看 (/etc/ansible/hosts需配置`SERVICE_PROXY="IPVS"`)
|
||
|
||
``` bash
|
||
# 首先创建测试应用
|
||
$ kubectl run nginx --image=nginx --replicas=3 --port=80 --expose
|
||
|
||
# 查看ipvsadm输出
|
||
$ ipvsadm
|
||
IP Virtual Server version 1.2.1 (size=4096)
|
||
Prot LocalAddress:Port Scheduler Flags
|
||
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
|
||
TCP 10.68.0.1:https rr persistent 10800 # 这个kubernetes虚拟服务地址
|
||
-> 192.168.1.1:6443 Masq 1 0 0
|
||
TCP 10.68.199.39:http rr # 这个是测试应用nginx的虚拟服务地址
|
||
-> 172.20.1.5:http Masq 1 0 0
|
||
-> 172.20.2.6:http Masq 1 0 0
|
||
-> 172.20.2.8:http Masq 1 0 0
|
||
```
|