Kubernetes服务连接被拒绝

我想用Kubernetes创建一个示例应用程序，但如果我尝试连接到Kubernetes中的响应服务，会拒绝连接。

例如，如果我从另一个pod连接到http：// random-generator-svc：5050 / i会收到一条错误，表示连接被拒绝。

这是用于创建服务和随机生成器部署的yaml文件：

apiVersion: v1
kind: Service
metadata:

name: random-generator-svc
labels:
  app: rand-gen

spec:
selector:

 app: rand-gen
 type: NodePort
 ports:
 - protocol: "TCP"
   port: 5050
   targetPort: 5050
   name: http

apiVersion: apps/v1
kind: Deployment
metadata:
name: random-generator-deployment
labels:

app: rand-gen

spec:
replicas: 2
selector:

matchLabels:
  app: rand-gen

template:

metadata:
labels:
  app: rand-gen

spec:

containers:
- name: random-generator-container
  image: toky03/random-generator-image:1.2
  ports:
  - containerPort: 5050

这是yaml文件，它指定服务和“调用者”应用程序的部署：

apiVersion: v1
kind: Service
metadata:
name: middle-tier-svc
labels:

app: rand-gen

spec:
selector:

app: rand-gen

type: NodePort
ports:

• protocol: "TCP"
  port: 7070
  targetPort: 7070
  name: http

apiVersion: apps/v1
kind: Deployment
metadata:
name: middle-tier-controller
labels:

app: rand-gen

spec:
replicas: 1
selector:

matchLabels:
  app: rand-gen

template:

metadata:
  labels:
    app: rand-gen
spec:
  containers:
  - name: random-controller-container
    image: toky03/random-controller-image:1.2
    ports:
    - containerPort: 7070

我将类型更改NodePort为尝试此错误是否也存在但我能够从群集外部访问服务。我的Kubernetes DNS解析器可能有问题吗？