概念

Ingress是kubernetes1.1之后官方提出的一个标准，按照这套标准它有多种实现，比如 nginx-ingress-controller、traefik-ingress-controller、kong-ingress-controller，这3中都是官方推荐的。Ingress的出现解决了Service的短板：只能在tcp层面做负载均衡。而ingress可以方便的做http/https层面的负载均衡。一个是在4层，一个在7层。ingress就是控制客户端从入口连接到k8s集群服务的规则的集合！

ingress出现之前，服务暴露是这样的：

ingress出现之后，服务暴露是这样的：

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目的： 通过本篇文章，能够简单了解和掌握Traefik在Kubernetes中的应用 如果不了解ingress和ingress-controller概念，请先看前一篇文章。http://km.oa.dragonest.com/x/RoFf traefik介绍： 开源的微服务网关服务，支持Mesos、Docker、Rancher、Kubernetes等等，也支持直接部署在物理服务器。能够实现负载均衡、HTTPS、自动更新Ingerss配置等等 traefik部署： traefik-deployment部署 apiVersion: extensions/v1beta1 kind: Deployment metadata: name: traefik-ingress-controller namespace: traefik labels: k8s-app: traefik-ingress-lb spec: replicas: 1 selector: matchLabels: k8s-app: traefik-ingress-lb template: metadata: labels: k8s-app: traefik-ingress-lb name: traefik-ingress-lb spec: nodeSelector: traefik-controller-qa: "yes" serviceAccountName: traefik-ingress-controller terminationGracePeriodSeconds: 60 volumes: - name: ssl secret: secretName: traefik-cert - name: config configMap: name: traefik-conf containers: - image: traefik name: traefik-ingress-lb volumeMounts: - mountPath: "/ssl" name: "ssl" - mountPath: "/config" name: "config" ports: - name: http containerPort: 80 - name: admin containerPort: 8080 - name: https containerPort: 443 args: - --configFile=/config/traefik.……

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