Kubernetes Ingress 服务

Ingress服务具体概念请阅读官方文档：https://kubernetes.io/zh-cn/docs/concepts/services-networking/ingress/

安装部署nginx-ingress

官方的Nginx-ingress对k8s是有版本要求的，注意选择适合你的版本:

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https://github.com/kubernetes/ingress-nginx

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可以直接使用kubernetes官方自带的nginx-ingress控制清单来部署

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wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controllerv1.3.0/
deploy/static/provider/kind/deploy.yaml -O nginx-ingress-v1.3.0.yaml
# 上面下载不了就访问下面的链接
https://github.com/kubernetes/ingress-nginx/archive/refs/tags/controllerv1.3.0.tar.gz

修改deploy.yaml镜像源为国内地址

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---439行
image: registry.cn-hangzhou.aliyuncs.com/google_containers/nginx-ingress-controller:v1.3.0
---546行
image: registry.cn-hangzhou.aliyuncs.com/google_containers/kubewebhook-certgen:v1.1.1
---595行
image: registry.cn-hangzhou.aliyuncs.com/google_containers/kubewebhook-certgen:v1.1.1

node节点增加标签

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kubectl label nodes node1 ingress-ready=true

应用资源配置

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kubectl apply -f deploy.yaml

查看创建的资源

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kubectl -n ingress-nginx get all

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创建测试的服务

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apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-nginx
spec:
  selector:
    matchLabels:
      app: my-nginx
  template:
    metadata:
      labels:
        app: my-nginx
    spec:
      containers:
      - name: my-nginx
        image: nginx
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
  name: my-nginx
  labels:
    app: my-nginx
spec:
  ports:
  - port: 80
    protocol: TCP
    name: http
  selector:
    app: my-nginx
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kubectl apply -f my-nginx.yaml

创建Ingress规则

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apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: my-nginx
  namespace: default
spec:
  ingressClassName: nginx
  rules:
  - host: nginx.k8s.com
    http:
      paths:
      - path: /
        pathType: ImplementationSpecific
        backend:
          service:
            name: my-nginx
            port:
              number: 80
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apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: my-nginx
  namespace: default
spec:
  ingressClassName: nginx # 匹配ingress类型为nginx
  rules: # 转发规则
  - host: nginx.k8s.com # 匹配的域名
    http: # 基于http协议解析
      paths: # 基于路径进行匹配
      - path: / # 匹配/路径
        pathType: ImplementationSpecific # 路径类型
        backend: # 匹配后跳转的后端服务
          service: # 设置后端跳转到Service的配置
            name: my-nginx # 跳转到名为my-nginx的clusterIP
            port: # 跳转到的端口
              number: 80 # Service端口号
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kubectl apply -f my-nginx-ingress.yaml

pathType路径类型支持的类型：

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ImplementationSpecific # 系统默认，由IngressClass控制器提供
Exact # 精确匹配URL路径，区分大小写
Prefix # 匹配URL路径的前缀，区分大小写

访问测试

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# windows、mac本地hosts添加解析
172.16.32.145 nginx.k8s.com

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