1、Ingress组件介绍
- Ingress解决的是新的服务加入后，域名和服务的对应问题，基本上是一个ingress的对象，通过yaml进行创建和更新进行加载。
- Ingress Controller是将Ingress这种变化生成一段Nginx的配置，然后将这个配置通过Kubernetes API写到Nginx的Pod中，然后reload.
2、生成一个默认的后端，如果遇到解析不到的URL就转发到默认后端页面
apiVersion: extensions/v1beta1kind: Deploymentmetadata: ?name: default-http-backend ?labels: ???app: default-http-backend ?namespace: ingress-nginxspec: ?replicas: 1 ?template: ???metadata: ?????labels: ???????app: default-http-backend ???spec: ?????terminationGracePeriodSeconds: 60 ?????containers: ?????- name: default-http-backend ???????# Any image is permissable as long as: ???????# 1. It serves a 404 page at / ???????# 2. It serves 200 on a /healthz endpoint ???????image: registry.cn-hangzhou.aliyuncs.com/google_containers/defaultbackend:1.4 ???????livenessProbe: ?????????httpGet: ???????????path: /healthz ???????????port: 8080 ???????????scheme: HTTP ?????????initialDelaySeconds: 30 ?????????timeoutSeconds: 5 ???????ports: ???????- containerPort: 8080 ???????resources: ?????????limits: ???????????cpu: 10m ???????????memory: 20Mi ?????????requests: ???????????cpu: 10m ???????????memory: 20Mi---apiVersion: v1kind: Servicemetadata: ?name: default-http-backend ?namespace: ingress-nginx ?labels: ???app: default-http-backendspec: ?ports: ?- port: 80 ???targetPort: 8080 ?selector: ???app: default-http-backend
[root@manager Ingress]# kubectl create -f default-backend.yaml
deployment "default-http-backend" created
service "default-http-backend" created
[root@manager Ingress]#
[root@manager Ingress]# kubectl get pods -n ingress-nginx -o wide
NAME ??????????????????????????????????READY ????STATUS ???RESTARTS ??AGE ??????IP ?????????NODE
default-http-backend-5d8887b7f-l8r29 ??1/1 ??????Running ??0 ?????????28s ??????10.0.91.6 ??192.168.10.221
3、部署Ingress Controller
[root@manager Ingress]# cat nginx-ingress-controller.yaml apiVersion: v1kind: ReplicationControllermetadata: ?name: nginx-ingress-lb ?labels: ???name: nginx-ingress-lb ?namespace: ingress-nginxspec: ?replicas: 1 ?template: ???metadata: ?????labels: ???????name: nginx-ingress-lb ?????annotations: ???????prometheus.io/port: ‘10254‘ ???????prometheus.io/scrape: ‘true‘ ???spec: ?????terminationGracePeriodSeconds: 60 ?????hostNetwork: true ?????containers: ?????- image: registry.cn-hangzhou.aliyuncs.com/google_containers/nginx-ingress-controller:0.8.3 ???????name: nginx-ingress-lb ???????readinessProbe: ?????????httpGet: ???????????path: /healthz ???????????port: 10254 ???????????scheme: HTTP ???????livenessProbe: ?????????httpGet: ???????????path: /healthz ???????????port: 10254 ???????????scheme: HTTP ?????????initialDelaySeconds: 10 ?????????timeoutSeconds: 1 ???????ports: ???????- containerPort: 80 ?????????hostPort: 80 ???????- containerPort: 443 ?????????hostPort: 443 ???????env: ?????????- name: POD_NAME ???????????valueFrom: ?????????????fieldRef: ???????????????fieldPath: metadata.name ?????????- name: POD_NAMESPACE ???????????valueFrom: ?????????????fieldRef: ???????????????fieldPath: metadata.namespace ?????????- name: KUBERNETES_MASTER ???????????value: http://192.168.10.220:8080 ???????args: ???????- /nginx-ingress-controller ???????- --default-backend-service=$(POD_NAMESPACE)/default-http-backend# ???????- --apiserver-host=http://192.168.10.220:8080
[root@manager Ingress]# kubectl get pod -n ingress-nginx -o wide
NAME ??????????????????????????????????READY ????STATUS ???RESTARTS ??AGE ??????IP ??????????????NODE
default-http-backend-5d8887b7f-l8r29 ??1/1 ??????Running ??0 ?????????21m ??????10.0.91.6 ???????192.168.10.221
nginx-ingress-lb-gj4sg ????????????????1/1 ??????Running ??0 ?????????1m ???????192.168.10.221 ??192.168.10.221
4、本实验通过nginx 容器，这里通过ingress 做入口访问svc
[root@manager ~]# cat nginx-deployment.yaml apiVersion: apps/v1beta2kind: Deploymentmetadata: ?name: nginx-deployment ?namespace: ingress-nginxspec: ?replicas: 3 ?selector: ???matchLabels: ?????app: nginx ?template: ???metadata: ?????labels: ???????app: nginx ???spec: ?????containers: ?????- name: nginx ???????image: nginx:1.10 ???????ports: ???????- containerPort: 80
[root@manager ~]# kubectl create -f nginx-deployment.yaml
[root@manager ~]# cat nginx-service.yaml
apiVersion: v1
kind: Service
metadata:
?name: nginx-service
?namespace: ingress-nginx
?labels:
???app: nginx
spec:
?ports:
?- port: 88
???targetPort: 80
?selector:
???app: nginx
[root@manager ~]# kubectl create -f nginx-service.yaml
[root@manager ~]# cat ingress-nginx.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
?name: nginxservice
?namespace: ingress-nginx
spec:
?rules:
?- host: test.io
???http:
?????paths:
?????- path: /
???????backend:
?????????serviceName: nginx-service
?????????servicePort: 80
?????- path: /
????# ??backend:
????# ????serviceName: kubernetes-dashboard
????# ????servicePort: 80
[root@manager ~]# kubectl create -f ingress-nginx.yaml
本机写host 文件进行访问，外部写host 文件，指向node ip 即可
kubernetes 之ingress
原文地址：https://www.cnblogs.com/hellojackyleon/p/8420911.html