I am using Docker Desktop version 3.6.0 which has Kubernetes 1.21.3.

I am following this tutorial to get started on Istio

https://istio.io/latest/docs/setup/getting-started/

Istio is properly installed as per the instructions.

Now whenever i try to apply the Istio configuration

by issuing the command kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml.

I get the following error

unable to recognize "samples/bookinfo/networking/bookinfo-gateway.yaml": no matches for kind "Gateway" in version "networking.istio.io/v1alpha3"
unable to recognize "samples/bookinfo/networking/bookinfo-gateway.yaml": no matches for kind "VirtualService" in version "networking.istio.io/v1alpha3"

I checked in internet and found that the Gateway and VirtualService resources are missing.

If i perform kubectl get crd i get no resources found

Content of bookinfo-gatway.yaml

    apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: bookinfo-gateway
spec:
  selector:
    istio: ingressgateway # use istio default controller
  servers:
  - port:
      number: 80
      name: http
      protocol: HTTP
    hosts:
    - "*"
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: bookinfo
spec:
  hosts:
  - "*"
  gateways:
  - bookinfo-gateway
  http:
  - match:
    - uri:
        exact: /productpage
    - uri:
        prefix: /static
    - uri:
        exact: /login
    - uri:
        exact: /logout
    - uri:
        prefix: /api/v1/products
    route:
    - destination:
        host: productpage
        port:
          number: 9080

CodePudding user response：

Your issue seems to be related with the apiVersion rather than the object itself.

Try

kubectl explain gateway

and check the VERSION parameter. It probably will be networking.istio.io/v1beta1.

EDIT

I installed istio, and this is what it should look like:

# kubectl explain gateway
KIND:     Gateway
VERSION:  networking.istio.io/v1beta1

DESCRIPTION:
     <empty>

FIELDS:
   apiVersion   <string>
     APIVersion defines the versioned schema of this representation of an
     object. Servers should convert recognized schemas to the latest internal
     value, and may reject unrecognized values. More info:
     https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources

   kind <string>
     Kind is a string value representing the REST resource this object
     represents. Servers may infer this from the endpoint the client submits
     requests to. Cannot be updated. In CamelCase. More info:
     https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

   metadata     <Object>
     Standard object's metadata. More info:
     https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

   spec <Object>
     Configuration affecting edge load balancer. See more details at:
     https://istio.io/docs/reference/config/networking/gateway.html

   status       <>

CodePudding user response：

The CRDs for istio should be installed as part of the istioctl install process, I'd recommend re-running the install if you don't have them available.

>>> ~/.istioctl/bin/istioctl install --set profile=demo -y
✔ Istio core installed
✔ Istiod installed
✔ Egress gateways installed
✔ Ingress gateways installed
✔ Installation complete

kubectl get po -n istio-system should look like

>>> kubectl get po -n istio-system
NAME                                   READY   STATUS    RESTARTS   AGE
istio-egressgateway-7ddb45fcdf-ctnp5   1/1     Running   0          3m20s
istio-ingressgateway-f7cdcd7dc-zdqhg   1/1     Running   0          3m20s
istiod-788ff675dd-9p75l                1/1     Running   0          3m32s

Otherwise your initial install has gone wrong somewhere.