Ingress资源与networking.k8s.io/v1问题

1 no matches for kind “Ingress” in version “networking.k8s.io/v1”

在 kubernetes v1.18.20 根据 traefik 官方文档部署 时&＃xff0c;当执行 kubectl apply -f 04-whoami-ingrsss.yaml 时 上执行以下 yaml 文件创建 ingress 资源的时候出现了这种报错 error: unable to recognize "04-whoami-ingress.yaml": no matches for kind "Ingress" in version "networking.k8s.io/v1"

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: whoami-ingress
namespace: ingress-ns
spec:
rules:
- http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: whoami
port:
name: web


查看 kubernetes 官方文档&＃xff1a;https://kubernetes.io/blog/2019/07/18/api-deprecations-in-1-16/、https://kubernetes.io/blog/2021/07/26/update-with-ingress-nginx/ 和 ingress-nginx 官方文档: https://kubernetes.github.io/ingress-nginx/&＃xff0c;其中有下面这两段话

kubernetes官网&＃xff1a;

The v1.22 release will stop serving the following deprecated API versions in favor of newer and more stable API versions:
Ingress in the extensions/v1beta1 API version will no longer be served
Migrate to use the networking.k8s.io/v1beta1 API version, available since v1.14. Existing persisted data can be retrieved/updated via the new version.


ingress-nginx 官网&＃xff1a;

也就是说自从 Kubernetes v1.14 版本开始 Ingress 资源才被加入到 networking.k8s.io/v1beta1 这个v1beta1 版本中来&＃xff0c;至于什么时候开始这个 networking.k8s.io/v1beta1 这个beta版本变成了稳定版本&＃xff0c;可以看这里&＃xff0c;也就是说到了 kubernetes v1.19 版本&＃xff0c;Ingress 资源才被加入到 networking.k8s.io/v1 这个版本中来。

因此我们可以把 Ingress 在 k8s 各个版本中所处的 apiVersion 做一个归纳&＃xff1a;

当我把yaml 文件中的 networking.k8s.io/v1 修改为 networking.k8s.io/v1beta1 &＃xff0c;又发生了如下的错误&＃xff1a;

error: error validating "04-whoami-ingress.yaml": error validating data: ValidationError(Ingress.spec.rules[0].http.paths[0].backend): unknown field "service" in io.k8s.api.networking.v1beta1.IngressBackend; if you choose to ignore these errors, turn validation off with --validate&＃61;false


也就是说在这个 networking.k8s.io/v1beta1 这个 apiVersion 版本下&＃xff0c; 我们ingress 的yaml 里&＃xff0c;有些 field 字段是不存在的&＃xff0c;比如: service, e.g &＃xff0c;下面我们需要修改我们的 04-whoami-ingress.yaml 文件&＃xff0c;请参考这里&＃xff1a;https://doc.traefik.io/traefik/providers/kubernetes-ingress/。

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
name: whoami-ingress
namespace: ingress-ns
spec:
rules:
- http:
paths:
- path: /
backend:
serviceName: whoami
servicePort: 80