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Traefik 是一个为了让部署微服务更加便捷而诞生的现代 HTTP 反向代理、负载均衡工具。traefik 本身设计的就能够实时跟 kubernetes api 交互#xff0c;感知后端 service#xff0c;pod 等的变化#xff0c;自动更新配置并重载。
traefik 是一…Traefik Ingress Controller
Traefik 是一个为了让部署微服务更加便捷而诞生的现代 HTTP 反向代理、负载均衡工具。traefik 本身设计的就能够实时跟 kubernetes api 交互感知后端 servicepod 等的变化自动更新配置并重载。
traefik 是一个前端负载均衡器对于微服务架构尤其是 kubernetes 等编排工具具有良好的支持
同 nginx 等相比traefik 能够自动感知后端容器变化从而实现自动服务发现。
traefik 部署在 k8s 上分为 daemonset 和 deployment 两种方式各有优缺点
daemonset 能确定有哪些 Node 在运行 traefik所以可以确定的知道后端 ip但是不能方便的伸缩。 deployment 可以更方便的伸缩但是不能确定有哪些 Node 在运行 traefik 所以不能确定的知道后端 ip。
一般部署两种不同类型的 traefik:
面向内部internal服务的 traefik建议可以使用 deployment 的方式。
面向外部external服务的 traefik建议可以使用 daemonset 的方式。建议使用 traffic-type 标签
traffic-type: external
traffic-type: internaltraefik 相应地使用 labelSelector
traffic-typeinternal
traffic-typeexternal官方网址: https://docs.traefik.io/
下载源码git clone https://github.com/containous/traefik.git//部署 nginx-ingress-controller 1、获取配置文件
mkdir /opt/traefik
cd /opt/traefik官方下载地址
wget https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-rbac.yaml
wget https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-deployment.yaml
wget https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-ds.yaml
wget https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/ui.yaml国内的 gitee
wget https://gitee.com/mirrors/traefik/raw/v1.7/examples/k8s/traefik-deployment.yaml
wget https://gitee.com/mirrors/traefik/raw/v1.7/examples/k8s/traefik-rbac.yaml
wget https://gitee.com/mirrors/traefik/raw/v1.7/examples/k8s/traefik-ds.yaml
wget https://gitee.com/mirrors/traefik/raw/v1.7/examples/k8s/ui.yaml2、依次执行 //启用RBAC
kubectl apply -f traefik-rbac.yaml//部署 Traefik 到 Kubernetes 集群为外部访问创建 NodePorts
kubectl apply -f traefik-deployment.yaml//部署 Traefik Web UI
kubectl apply -f ui.yaml//查看结果
kubectl get svc -o wide -n kube-system | grep traefik
traefik-ingress-service NodePort 10.96.241.13 none 80:32383/TCP,8080:32133/TCP 103m k8s-apptraefik-ingress-lb
traefik-web-ui ClusterIP 10.96.67.119 none 80/TCP 101m k8s-apptraefik-ingress-lb//访问 Traefik UI浏览器访问 http://Nodeip:NodePort/dashboard/
http://192.168.80.14:32133/dashboard///Ingress HTTP 代理访问
cd /opt/ingress-nodeport#创建 deployment、Service、Ingress Yaml 资源
vim ingress-nginx.yaml
apiVersion: apps/v1
kind: Deployment
metadata:name: nginx-app
spec:replicas: 2selector:matchLabels:name: nginxtemplate:metadata:labels:name: nginxspec:containers:- name: nginximage: nginximagePullPolicy: IfNotPresentports:- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:name: nginx-svc
spec:ports:- port: 80targetPort: 80protocol: TCPselector:name: nginx
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:name: nginx-test
spec:rules:- host: www.my.comhttp:paths:- path: /pathType: Prefixbackend:service: name: nginx-svcport:number: 80kubectl apply -f ingress-nginx.yamlkubectl get svc,pods -o wideNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
service/kubernetes ClusterIP 10.96.0.1 none 443/TCP 23d none
service/nginx-svc ClusterIP 10.96.89.181 none 80/TCP 88m namenginxNAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
pod/nginx-app-65d7b99f6b-nnw7q 1/1 Running 0 88m 10.244.2.4 node02 none none
pod/nginx-app-65d7b99f6b-x47l8 1/1 Running 0 88m 10.244.1.5 node01 none nonekubectl exec -it pod/nginx-app-65d7b99f6b-nnw7q bash# cd /usr/share/nginx/html/# echo this is web1 index.html kubectl exec -it pod/nginx-app-65d7b99f6b-x47l8 bash# cd /usr/share/nginx/html/# echo this is web2 index.html#测试访问
curl 10.96.89.181kubectl get svc -o wide -n kube-system | grep traefik
traefik-ingress-service NodePort 10.96.241.13 none 80:32383/TCP,8080:32133/TCP 103m k8s-apptraefik-ingress-lb
traefik-web-ui ClusterIP 10.96.67.119 none 80/TCP 101m k8s-apptraefik-ingress-lb#本地 host 添加域名解析
vim /etc/hosts
192.168.80.10 master
192.168.80.11 node01
192.168.80.12 node02
192.168.80.12 www.xiaoma.com www.my.com#模拟外部访问
curl http://www.my.com:32383#再刷新查看 Traefik UI 界面会生成刚创建的集群信息
http://192.168.80.14:32133/dashboard/
