ingress-traefix - 容器相关

#官方ingress
	https://kubernetes.io/docs/concepts/services-networking/ingress/
	
	https://kubernetes.github.io/ingress-nginx/
	
#Traefik
	https://zhuanlan.zhihu.com/p/105239989
	
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#安装traefik
##创建traefik的rbac权限
	kubectl apply -f https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-rbac.yaml
	
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##安装：二选一
####DaemonSet版本
	kubectl apply -f https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-ds.yaml
####或
kubectl apply -f https://raw.githubusercontent.com/containous/traefik/v1.7/examples/k8s/traefik-deployment.yaml

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##注意：traefik会在每个node节点上暴露80端口矣提供服务，DaemonSet版本用Pod的HostPort进行暴露，Deployment版本会用Service的NodePort进行暴露。
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#操作
##创建示例Deployment
	apiVersion: apps/v1
	kind: Pod
	metadata:
	  name: exampledeploymentnginx
	spec:
	  replicas: 1
	  selector:
	    matchLabels:
		  example: deploymentfornginx
	  template:
	    metadata:
		  labels:
		    example: deploymentfornginx
		spec:
		  containers:
		  - name: nginx
		    image: nginx: 1.7.9
			ports:
			- containerPort: 80
	---
	apiVersion: apps/v1
	kind: Pod
	metadata:
	  name: exampledeploymenthttpd
	spec:
	  replicas: 1
	  selector:
	    matchLabels:
	      example: deploymentforhttpd
	  template:
	    metadata:
	      labels:
	        example: deploymentforhttpd
	    spec:
	      containers:
	      - name: httpd
	        image: httpd:2.2
	        ports:
	        - containerPort: 80
			
---
##创建对应的示例Service
	apiVersion: v1
	kind: Service
	metadata:
	  name: exampleservicenginx
	spec:
	  selector:
	    example: deploymentfornginx
	  ports:
	  - protocol: TCP
	    port: 8081
		targetPort: 80
	---
	apiVersion: v1
	kind: Service
	metadata:
	  name: exampleservicehttpd
	spec:
	  selector:
	    example: deploymentforhttpd
	  ports:
	  - protocol: TCP
	    port: 8081
	    targetPort: 80
		
---
##创建Ingress
###方式一：不使用域名的单个Service
	apiVersion: extensions/v1beta1
	kind: Ingress
	metadata:
	  name: examplesingleingress
	  annotations:
	    kubernetes.io.ingress.class: traefik
	spec:
	  backend:
	    serviceName: exampleservicehttpd
		servicePort: 8081
---
###测试：
	curl http://<任意NODEIP>:<Igress服务端口>
---
###方式二：基于域名划分多个子路径
	apiVersion: extensions/v1beta1
	kind: Ingress
	metadata:
	  name: examplesingleingress
	  annotations:
	    kubernetes.io.ingress.class: traefik
		traefik.frontend.rule.type: PatePrefixStrip
	spec:
	  rules:
	  - host: web.testk8s.com
	    http:
		  paths:
		  - path: /httpdservice
		    backend:
			  serviceNmae: exampleservicehttpd
			  servicePort: 8081
		  - path: /nginxservice
		     backend:
	           serviceName: exampleservicenginx
	           servicePort: 8081
---
###测试：
	curl http://web.testk8s.com/httpdservice
	curl http://web.testk8s.com/nginxservice
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###方式三：基于多域名
	apiVersion: extensions/v1beta1
	kind: Ingress
	metadata:
	  name: examplesingleingress
	  annotations:
	    kubernetes.io.ingress.class: traefik
	spec:
	  rules:
	  - host: web.testk8shttpd.com
	    http:
	      paths:
	      - backend:
	          serviceNmae: exampleservicehttpd
	          servicePort: 8081
	  - host: web.testk8snginx.com
	    http:
	      paths:
	       - backend:
	           serviceName: exampleservicenginx
	           servicePort: 8081
---
###测试
	curl http://web.testk8shttpd.com
	curl http://web.testk8snginx.com
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