安装cilium网络组件
cilium 是一个革新的网络与安全组件；基于 linux 内核新技术--BPF，它可以透明、零侵入地实现服务间安全策略与可视化，主要优势如下：
- 支持L3/L4, L7(如：HTTP/gRPC/Kafka)的安全策略
- 支持基于安全ID而不是地址+端口的传统防火墙策略
- 支持基于Overlay或Native Routing的扁平多节点pod网络
- Overlay VXLAN 方式类似于 flannel 的VXLAN后端
- 高性能负载均衡，支持DSR
- 支持事件、策略跟踪和监控集成
cilium 项目当前文档比较完整，建议仔细阅读下[官网文档]
kubeasz 集成安装 cilium
kubeasz 3.3.1 更新重写了cilium 安装流程，使用helm charts 方式，配置文件在 roles/cilium/templates/values.yaml.j2，请阅读原charts中values.yaml 文件后自定义修改。
- 相关镜像已经离线打包并推送到本地镜像仓库，通过
ezdown -X命令下载cilium等额外镜像
0.升级内核并重启
- Linux kernel >= 4.9.17，请阅读文档升级内核
- etcd >= 3.1.0 or consul >= 0.6.4
1.选择cilium网络后安装
- 参考快速指南，设置
/etc/kubeasz/clusters/xxx/hosts文件中变量CLUSTER_NETWORK="cilium" - 执行集群安装
dk ezctl setup xxx all
注意默认安装后集成了cilium_connectivity_check 和 cilium_hubble，可以在/etc/kubeasz/clusters/xxx/config.yml配置关闭
- cilium_connectivity_check：检查集群cilium网络是否工作正常，非常实用
- cilium_hubble：很酷很实用的监控、策略追踪排查工具
Cilium CLI 和 Hubble CLI 二进制已经默认包含在kubeasz-ext-bin 1.2.0版本中 https://github.com/kubeasz/dockerfiles/blob/master/kubeasz-ext-bin/Dockerfile
2.验证
一键安装完成后如下，注意cilium_connectivity_check 中带multi-node的检查任务需要多节点集群才能完成
kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
cilium-test echo-a-5dd478f5d8-74xg5 1/1 Running 0 3m10s
cilium-test echo-b-78c79f6cdd-t9vk6 1/1 Running 0 3m10s
cilium-test echo-b-host-75c44b897-c8f5m 1/1 Running 0 3m10s
cilium-test host-to-b-multi-node-clusterip-7895fd494c-92cb2 1/1 Running 0 2m59s
cilium-test host-to-b-multi-node-headless-74bbc877b5-ffxxx 1/1 Running 0 2m59s
cilium-test pod-to-a-allowed-cnp-598fc5c547-b885q 1/1 Running 0 2m59s
cilium-test pod-to-a-b8b456c99-r6272 1/1 Running 0 2m59s
cilium-test pod-to-a-denied-cnp-c78c44f5c-7xhkw 1/1 Running 0 2m59s
cilium-test pod-to-b-intra-node-nodeport-6ccdb55779-j8gnd 1/1 Running 0 2m59s
cilium-test pod-to-b-multi-node-clusterip-55d8448b5c-5b4nj 1/1 Running 0 2m59s
cilium-test pod-to-b-multi-node-headless-5fbf655bb9-pszpr 1/1 Running 0 2m59s
cilium-test pod-to-b-multi-node-nodeport-65f5b95569-qglb7 1/1 Running 0 2m59s
cilium-test pod-to-external-1111-64496c754c-bvqlt 1/1 Running 0 2m59s
cilium-test pod-to-external-fqdn-allow-baidu-cnp-6f96597855-c84zs 1/1 Running 0 2m59s
kube-system cilium-7trcs 1/1 Running 0 3m42s
kube-system cilium-hvclp 1/1 Running 0 3m42s
kube-system cilium-operator-8566689975-vcxpp 1/1 Running 0 3m42s
kube-system cilium-pw2sv 1/1 Running 0 3m42s
kube-system cilium-qppnc 1/1 Running 0 3m42s
kube-system coredns-84b58f6b4-m8x7s 1/1 Running 0 3m20s
kube-system dashboard-metrics-scraper-864d79d497-92l2w 1/1 Running 0 3m14s
kube-system hubble-relay-655dc744d7-8d9n7 1/1 Running 0 3m42s
kube-system hubble-ui-54599d7967-lfkvk 2/2 Running 0 3m42s
kube-system kubernetes-dashboard-5fc74cf5c6-pqdvc 1/1 Running 0 3m14s
kube-system metrics-server-69797698d4-2jbg8 1/1 Running 0 3m17s
kube-system node-local-dns-5n8gc 1/1 Running 0 3m19s
kube-system node-local-dns-5pm2p 1/1 Running 0 3m19s
kube-system node-local-dns-9x229 1/1 Running 0 3m19s
kube-system node-local-dns-jz8lj 1/1 Running 0 3m19s
检查 cilium 节点状态
cilium status
/¯¯\
/¯¯\__/¯¯\ Cilium: OK
\__/¯¯\__/ Operator: OK
/¯¯\__/¯¯\ Hubble: OK
\__/¯¯\__/ ClusterMesh: disabled
\__/
DaemonSet cilium Desired: 4, Ready: 4/4, Available: 4/4
Deployment cilium-operator Desired: 1, Ready: 1/1, Available: 1/1
Deployment hubble-relay Desired: 1, Ready: 1/1, Available: 1/1
Deployment hubble-ui Desired: 1, Ready: 1/1, Available: 1/1
Containers: cilium Running: 4
cilium-operator Running: 1
hubble-relay Running: 1
hubble-ui Running: 1
Cluster Pods: 17/17 managed by Cilium
Image versions hubble-relay easzlab.io.local:5000/cilium/hubble-relay:v1.11.6: 1
hubble-ui easzlab.io.local:5000/cilium/hubble-ui:v0.9.0: 1
hubble-ui easzlab.io.local:5000/cilium/hubble-ui-backend:v0.9.0: 1
cilium easzlab.io.local:5000/cilium/cilium:v1.11.6: 4
cilium-operator easzlab.io.local:5000/cilium/operator-generic:v1.11.6: 1
cilium network policy
cilium network policy 提供了比k8s network policy更丰富的网络安全策略功能，有兴趣的请阅读官网文档，以下是一个有趣的小例子：