将K8S部署应用提供给外部访问一般有三种方式：
NodePort 暴露端口到节点，提供了集群外部访问的入口
LoadBalancer 需要负载均衡器（通常都需要云服务商提供，裸机可以安装 METALLB 测试）
Ingress 统一管理 svc的外部访问，用于实现用域名的方式访问k8s内部应用，常用类型
Treafik、Nginx
相对 NodePort 来说，Ingress 就实现外部访问的统一管理，类型配置 nginx.conf 一样，根据 域名、路由等转发到不同服务上
可以随时更改配置规则并生效，方便统一管理
NodePort 简单示例：
spec.ports.nodePort 可以实现一个svc的外部访问配置
apiVersion: v1kind: Servicemetadata: labels:expose: "true"app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshu name: device-info-1 namespace: xiaoshuspec: type: NodePort ports:- name: http port: 30802 # 服务端口 targetPort: 8300 # 容器端口 protocol: TCP nodePort: 30802 # 外部访问端口 selector:app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshu
Ingress 简单示例：
准备了两个简单的jar 服务，服务一 device-info-1 服务端口8001、服务二 device-info-2 服务端口8002
@ApiOperation(value = "测试接口")@GetMapping("/server")public String test(){return "服务一：192.168.2.207";}@ApiOperation(value = "测试接口")@GetMapping("/server")public String test(){return "服务二：192.168.2.208";} yml
apiVersion: apps/v1kind: Deploymentmetadata: labels:app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshu name: device-info-1 namespace: xiaoshuspec: replicas: 1 selector:matchLabels: app: device-info provider: xiaoshu version: "1.0" group: com.xiaoshu template:metadata: labels:app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshuspec: containers: - name: device-info-1image: core.harbor.domain/jar/device-info-1:v1 nodeName: k8s-1 ---apiVersion: v1kind: Servicemetadata: labels:expose: "true"app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshu name: device-info-1 namespace: xiaoshuspec: type: ClusterIP ports:- name: http port: 8001 # 服务端口 targetPort: 8300 # 容器端口 protocol: TCP selector:app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshu
apiVersion: apps/v1kind: Deploymentmetadata: labels:app: device-info-2provider: xiaoshuversion: "1.0"group: com.xiaoshu name: device-info-2 namespace: xiaoshuspec: replicas: 1 selector:matchLabels: app: device-info-2 provider: xiaoshu version: "1.0" group: com.xiaoshu template:metadata: labels:app: device-info-2provider: xiaoshuversion: "1.0"group: com.xiaoshuspec: containers: - name: device-info-2image: core.harbor.domain/jar/device-info-2:v1 nodeName: k8s-1 ---apiVersion: v1kind: Servicemetadata: labels:expose: "true"app: device-info-2provider: xiaoshuversion: "1.0"group: com.xiaoshu name: device-info-2 namespace: xiaoshuspec: type: ClusterIP ports:- name: http port: 8002 targetPort: 8300 # 容器端口 protocol: TCP selector:app: device-info-2provider: xiaoshuversion: "1.0"group: com.xiaoshu
Ingress yml
根据
域名转发到不同的 服务上注意labels 配置，与svc可以匹配
apiVersion: networking.k8s.io/v1kind: Ingressmetadata: name: device-info-ingress namespace: xiaoshu annotations:#kubernetes.io/ingress.class: "nginx"#nginx.ingress.kubernetes.io/rewrite-target: / #路径重写,需要安装NGINX Ingress控制器生效 labels:app: device-infoprovider: xiaoshuversion: "1.0"group: com.xiaoshuspec: rules: - host: device.info.ingress1http: paths: - backend: service:name: device-info-1port: number: 8001 #服务端口path: /device-info/serverpathType: Prefix - host: device.info.ingress2http: paths: - backend: service:name: device-info-2port: number: 8002 #服务端口path: /device-info/serverpathType: Prefix
