k8s部署Ingress并创建规则的详细介绍
作者:suqinyi
这篇文章主要介绍了k8s部署Ingress并创建规则,本文通过图文实例相结合给大家介绍的非常详细,对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下
一、Ingress介绍
Ingress由两部分组成:Ingress controller和Ingress服务
- 通过 Service 发现 Pod 进行关联。基于域名访问
- 通过 Ingress Controller 实现 Pod 负载均衡
- 支持 TCP/UDP 4 层负载均衡和 HTTP 7 层负载均衡
底层实现是nignx
二、Ingress文件获取
1.1 、说明
官方地址:https://github.com/kubernetes/ingress-nginx
部署文件说明
## 这个地址被墙,需要科学上网!!! # mandatory.yaml为ingress所有资源yml文件的集合 # 若是单独部署,需要分别下载configmap.yaml、namespace.yaml、rbac.yaml、service-nodeport.yaml、with-rbac.yaml wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml # service-nodeport.yaml为ingress通过nodeport对外提供服务,注意默认nodeport暴露端口为随机,可以编辑该文件自定义端口 wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/baremetal/service-nodeport.yaml
1.2 、文件内容
ingress-controller.yaml
apiVersion: v1 kind: Namespace metadata: name: ingress-nginx labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx --- kind: ConfigMap name: nginx-configuration namespace: ingress-nginx name: tcp-services name: udp-services kind: ServiceAccount name: nginx-ingress-serviceaccount apiVersion: rbac.authorization.k8s.io/v1beta1 kind: ClusterRole name: nginx-ingress-clusterrole rules: - apiGroups: - "" resources: - configmaps - endpoints - nodes - pods - secrets verbs: - list - watch - get - services - "extensions" - ingresses - events - create - patch - ingresses/status - update kind: Role name: nginx-ingress-role - namespaces resourceNames: # Defaults to "<election-id>-<ingress-class>" # Here: "<ingress-controller-leader>-<nginx>" # This has to be adapted if you change either parameter # when launching the nginx-ingress-controller. - "ingress-controller-leader-nginx" kind: RoleBinding name: nginx-ingress-role-nisa-binding roleRef: apiGroup: rbac.authorization.k8s.io kind: Role subjects: - kind: ServiceAccount name: nginx-ingress-serviceaccount namespace: ingress-nginx kind: ClusterRoleBinding name: nginx-ingress-clusterrole-nisa-binding kind: ClusterRole apiVersion: apps/v1 kind: DaemonSet name: nginx-ingress-controller spec: selector: matchLabels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx template: metadata: labels: app.kubernetes.io/name: ingress-nginx app.kubernetes.io/part-of: ingress-nginx annotations: prometheus.io/port: "10254" prometheus.io/scrape: "true" spec: hostNetwork: true serviceAccountName: nginx-ingress-serviceaccount containers: - name: nginx-ingress-controller image: siriuszg/nginx-ingress-controller:0.20.0 args: - /nginx-ingress-controller - --configmap=$(POD_NAMESPACE)/nginx-configuration - --tcp-services-configmap=$(POD_NAMESPACE)/tcp-services - --udp-services-configmap=$(POD_NAMESPACE)/udp-services - --publish-service=$(POD_NAMESPACE)/ingress-nginx - --annotations-prefix=nginx.ingress.kubernetes.io securityContext: allowPrivilegeEscalation: true capabilities: drop: - ALL add: - NET_BIND_SERVICE # www-data -> 33 runAsUser: 33 env: - name: POD_NAME valueFrom: fieldRef: fieldPath: metadata.name - name: POD_NAMESPACE fieldPath: metadata.namespace ports: - name: http containerPort: 80 - name: https containerPort: 443 livenessProbe: failureThreshold: 3 httpGet: path: /healthz port: 10254 scheme: HTTP initialDelaySeconds: 10 periodSeconds: 10 successThreshold: 1 timeoutSeconds: 10 readinessProbe: kind: Service #type: NodePort ports: - name: http port: 80 targetPort: 80 protocol: TCP - name: https port: 443 targetPort: 443
三、k8s应用 ingress-controller.yaml
应用
kubectl apply -f ingress-controller.yaml
如图:
查看是否完成
kubectl get pods --all-namespaces
四、创建Ingress规则
如果没有部署和服务
==>查看k8s部署并映射tomcat8
查看自己创建的服务,以tomcat8为例
kubectl get all
自己创建文件 ingress-tomcat8.yaml
vi ingress-tomcat8.yaml
ingress-tomcat8.yaml规则内容
apiVersion: extensions/v1beta1 kind: Ingress metadata: name: web spec: rules: - host: k8s.tomcat8.com http: paths: - backend: serviceName: tomcat8 servicePort: 80
如图:
五、应用文件
kubectl apply -f ingress-tomcat8.yaml
六、访问
1.本地测试用域名会访问不到,所以要配置下本地hosts文件
hosts文件位置:C:\Windows\System32\drivers\etc\HOSTS
如图:
不带端口访问,直接使用域名
使用ip端口访问的效果
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