KubeEdge | [进阶] KubeEdge高可用环境搭建

高可用方案梳理

Kubernetes高可用

修改 kubernetes-init.yaml 两个地方

• 修改 ETCD 的地址 改成集群地址
• 修改 控制节点 的地址 改成 LoadBalancer 地址
• join 命令使用新增控制面节点的命令来新增多主节点

KubeEdge高可用

云端 cloudcore 容器化

	# 测试环境中使用的 KubeEdge 版本为 1.13.0 版本较新 默认即为容器启动 故此步省略
	[root@master ~]# docker ps -a | grep kubeedge
	efcb55359d5f kubeedge/cloudcore "cloudcore" 2 days ago Up 2 days k8s_cloudcore_cloudcore-786689f8cb-7kk8v_kubeedge_d940365f-950d-4a5b-8810-3632ce2f13b4_0
	6802fcb66b18 registry.aliyuncs.com/google_containers/pause:3.4.1 "/pause" 2 days ago Up 2 days k8s_POD_cloudcore-786689f8cb-7kk8v_kubeedge_d940365f-950d-4a5b-8810-3632ce2f13b4_0
	[root@master ~]# netstat -nplt | grep cloudcore
	tcp6 0 0 :::10000 :::* LISTEN 10783/cloudcore
	tcp6 0 0 :::10002 :::* LISTEN 10783/cloudcore
	tcp6 0 0 :::10003 :::* LISTEN 10783/cloudcore
	tcp6 0 0 :::10004 :::* LISTEN 10783/cloudcore
	# Edge 节点通过自定义配置项纳管到云端
	$ /opt/ke_install
	$ tar -zxvf kubeedge-v1.13.0-linux-amd64
	$ cp kubeedge-v1.13.0-linux-amd64/edge/edgecore /usr/local/bin/
	- https://kubeedge.io/zh/docs/setup/config_zh/
	$ edgecore --defaultconfig > /etc/kubeedge/config/edgecore.yaml
	apiVersion: edgecore.config.kubeedge.io/v1alpha2
	kind: EdgeCore
	modules:
	edgeHub:
	httpServer: https://172.129.78.153:10002
	token: "72de9c27eef0a841f91e68257f0156ec57d42bd46623fc90dc036c00842c59d5.eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODU4MDQyNDR9.rSQ5ntF6_LrgEr4I6WTxD0yrZWgRYV45wBM6pzYiam4"
	websocket:
	server: 172.129.78.153:10000
	# 修改这三个地方.
	[root@master ~]# kubectl get secret -n kubeedge
	NAME TYPE DATA AGE
	casecret Opaque 2 2d4h
	cloudcore Opaque 3 2d4h
	cloudcore-token-6rnlp kubernetes.io/service-account-token 3 2d4h
	cloudcoresecret Opaque 2 2d4h
	default-token-74jtf kubernetes.io/service-account-token 3 2d4h
	sh.helm.release.v1.cloudcore.v1 helm.sh/release.v1 1 2d4h
	sh.helm.release.v1.cloudcore.v2 helm.sh/release.v1 1 2d4h
	tokensecret Opaque 1 2d4h
	[root@master ~]# kubectl get secret tokensecret -n kubeedge -oyaml
	apiVersion: v1
	data:
	tokendata: NzJkZTljMjdlZWYwYTg0MWY5MWU2ODI1N2YwMTU2ZWM1N2Q0MmJkNDY2MjNmYzkwZGMwMzZjMDA4NDJjNTlkNS5leUpoYkdjaU9pSklVekkxTmlJc0luUjVjQ0k2SWtwWFZDSjkuZXlKbGVIQWlPakUyT0RVNE1EUXlORFI5LnJTUTVudEY2X0xyZ0VyNEk2V1R4RDB5clpXZ1JZVjQ1d0JNNnB6WWlhbTQ=
	kind: Secret
	metadata:
	creationTimestamp: "2023-05-31T13:47:39Z"
	name: tokensecret
	namespace: kubeedge
	resourceVersion: "315983"
	uid: b1edfa89-c4b2-4937-a919-7b04feba28cd
	type: Opaque
	[root@master ~]# echo NzJkZTljMjdlZWYwYTg0MWY5MWU2ODI1N2YwMTU2ZWM1N2Q0MmJkNDY2MjNmYzkwZGMwMzZjMDA4NDJjNTlkNS5leUpoYkdjaU9pSklVekkxTmlJc0luUjVjQ0k2SWtwWFZDSjkuZXlKbGVIQWlPakUyT0RVNE1EUXlORFI5LnJTUTVudEY2X0xyZ0VyNEk2V1R4RDB5clpXZ1JZVjQ1d0JNNnB6WWlhbTQ= | base64 -d
	72de9c27eef0a841f91e68257f0156ec57d42bd46623fc90dc036c00842c59d5.eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE2ODU4MDQyNDR9.rSQ5ntF6_LrgEr4I6WTxD0yrZWgRYV45wBM6pzYiam4
	# 修改名字
	edged:
	hostnameOverride: edgeMyCompute
	# 通道
	edgeStream:
	enable: true
	$ cp /opt/ke_install/kubeedge-1.13.0/build/toolsedgecore.service /etc/systemd/system/
	$ systemctl enable --now edgecore
	Created symlink from /etc/systemd/system/multi-user.target.wants/edgecore.service to /etc/systemd/system/edgecore.service

hosted with ❤ by GitHub

keepalived原理

• 通过 keepalived得到一个虚拟 IP

nodePort高可用实战

• 运行多个 pod 然后定义 service 转发端口至 NodePort --> 达到高可用

相关案例见视频

• 若无法正常加载, 请点击查看 PDF 网页版本: 【拓展】漫谈高可用与负载均衡.pdf