打开指向Kubernetes API服务器的反向代理：

kubectl proxy --port=8080

保存Swagger文件。* 由于CORS策略，无法直接链接。*

curl localhost:8080/openapi/v2 > k8s-swagger.json

使用Swagger UI启动一个Docker容器

docker run \
    --rm \
    -p 80:8080 \
    -e SWAGGER_JSON=/k8s-swagger.json \
    -v $(pwd)/k8s-swagger.json:/k8s-swagger.json \
    swaggerapi/swagger-ui

参考：https://jonnylangefeld.com/blog/kubernetes-how-to-view-swagger-ui
如果您想充分发挥Swagger的潜力，本指南可能会帮助您：https://github.com/olivernadj/Kubernetes-REST-API-feat-Swagger-UI

获取openapi json最简单的方法是：

kubectl get --raw /openapi/v2  > k8s-openapi-v2.json

现在你可以为这个json启动一个swagger-ui示例，如下所示：

docker run \
  -v $PWD/k8s-openapi-v2.json:/app/swagger.json \
  -p 8081:8080 \
  swaggerapi/swagger-ui

导航到https：//本地主机：8081
你会看到一个昂首阔步的用户界面，但它相当落后，因为Kubernetes集群公开了许多API。

这里有一个快速的方法来玩swagger和k8s api。
不适用于生产。

1. wget -q -O - https://raw.githubusercontent.com/k3d-io/k3d/main/install.sh | bash
2. k3d cluster create -p "80:80@loadbalancer" -p "443:443@loadbalancer"
3. kubectl apply -f tools/swagger/swagger.yml
4. kubectl create token new-admin-sa
5. replace token in tools/swagger/swagger.yml
6. kubectl apply -f tools/swagger/swagger.yml
7. echo "127.0.0.1 kubernetes" >> /etc/hosts
8. echo "127.0.0.1 swagger-ui" >> /etc/hosts

Failed to load API definition

apiVersion: traefik.containo.us/v1alpha1
kind: ServersTransport
metadata:
  name: mytransport
spec:
  serverName: kubernetes
  insecureSkipVerify: true
---
apiVersion: traefik.containo.us/v1alpha1
kind: IngressRoute
metadata:
  name: testroute
spec:
  entryPoints:
    - websecure
  routes:
    - match: Host(`kubernetes`)
      kind: Rule
      services:
        - kind: Service
          name: kubernetes
          port: 443
          serversTransport: mytransport
      middlewares:
        - name: test-header
    - match: Host(`swagger-ui`)
      kind: Rule
      services:
        - kind: Service
          name: swagger-ui-service
          port: 8080
      middlewares:
        - name: test-header

---
apiVersion: traefik.containo.us/v1alpha1
kind: Middleware
metadata:
  name: test-header
spec:
  headers:
    customRequestHeaders:
      Authorization: "Bearer PASTE_YOUR_TOKEN_HERE"
    accessControlAllowMethods:
      - "GET"
      - "OPTIONS"
      - "PUT"
    accessControlAllowOriginList:
      - "https://kubernetes"
      - "https://swagger-ui"
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: swagger-ui
  labels:
    app: swagger-ui
spec:
  replicas: 1
  selector:
    matchLabels:
      app: swagger-ui
  template:
    metadata:
      labels:
        app: swagger-ui
    spec:
      containers:
        - name: swagger-ui
          image: swaggerapi/swagger-ui
          ports:
            - containerPort: 8080
          env:
            - name: URL
              value: https://kubernetes/openapi/v2
---
apiVersion: v1
kind: Service
metadata:
  name: swagger-ui-service # a random name
spec:
  selector:  # to connect to Pod through label
    app: swagger-ui
  ports:
    - port: 8080  # service port
      protocol: TCP
      targetPort: 8080  # container port
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: new-admin-sa
  namespace: default
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: new-admin-crb
subjects:
  - kind: ServiceAccount
    name: new-admin-sa
    namespace: default
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io

尽情享受https://swagger-ui/
UPD：如果您看到Failed to load API definition，请打开https://kubernetes/，单击Proceed to kubernetes (unsafe)，然后重试https://swagger-ui/。
否则，请确保按顺序执行步骤！
清洁：k3d cluster delete

Kubernetes API服务器通过/openapi/v2端点为OpenAPI规范提供服务。