使用istioctl命令查看gateway及virtualservices

istioctl命令，比kubectl命令，在查看istio资源方面，要方便很多。

如果使用microk8s安装，则命令为microk8s.istioctl了。

查看gateway及virtualservices的简单命令和详细信息命令如下：

microk8s.istioctl get gateway
microk8s.istioctl get virtualservices
microk8s.istioctl get gateway -o yaml
microk8s.istioctl get virtualservices -o yaml

输出如下：

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"networking.istio.io/v1alpha3","kind":"Gateway","metadata":{"annotations":{},"name":"bookinfo-gateway","namespace":"default"},"spec":{"selector":{"istio":"ingressgateway"},"servers":[{"hosts":["*"],"port":{"name":"http","number":80,"protocol":"HTTP"}}]}}
  creationTimestamp: null
  name: bookinfo-gateway
  namespace: default
  resourceVersion: "5913655"
spec:
  selector:
    istio: ingressgateway
  servers:
  - hosts:
    - '*'
    port:
      name: http
      number: 80
      protocol: HTTP
---

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"networking.istio.io/v1alpha3","kind":"VirtualService","metadata":{"annotations":{},"name":"bookinfo","namespace":"default"},"spec":{"gateways":["bookinfo-gateway"],"hosts":["*"],"http":[{"match":[{"uri":{"exact":"/productpage"}},{"uri":{"exact":"/login"}},{"uri":{"exact":"/logout"}},{"uri":{"prefix":"/api/v1/products"}}],"route":[{"destination":{"host":"productpage","port":{"number":9080}}}]}]}}
  creationTimestamp: null
  name: bookinfo
  namespace: default
  resourceVersion: "5913656"
spec:
  gateways:
  - bookinfo-gateway
  hosts:
  - '*'
  http:
  - match:
    - uri:
        exact: /productpage
    - uri:
        exact: /login
    - uri:
        exact: /logout
    - uri:
        prefix: /api/v1/products
    route:
    - destination:
        host: productpage
        port:
          number: 9080
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"networking.istio.io/v1alpha3","kind":"VirtualService","metadata":{"annotations":{},"name":"reviews","namespace":"default"},"spec":{"hosts":["reviews"],"http":[{"route":[{"destination":{"host":"reviews","subset":"v1"},"weight":50},{"destination":{"host":"reviews","subset":"v3"},"weight":50}]}]}}
  creationTimestamp: null
  name: reviews
  namespace: default
  resourceVersion: "5962355"
spec:
  hosts:
  - reviews
  http:
  - route:
    - destination:
        host: reviews
        subset: v1
      weight: 50
    - destination:
        host: reviews
        subset: v3
      weight: 50