istio(6)：流量管理-中断访问故障注入

istio-流量管理-中断访问故障注入

移除 VirutualService 资源对象

 

[root@k8s-master istio-1.3.1]# kubectl delete virtualservices.networking.istio.io ratings
virtualservice.networking.istio.io "ratings" deleted
[root@k8s-master istio-1.3.1]# istioctl get virtualservice
Command "get" is deprecated, Use `kubectl get` instead (see https://kubernetes.io/docs/tasks/tools/install-kubectl)
VIRTUAL-SERVICE NAME   GATEWAYS           HOSTS     #HTTP     #TCP      NAMESPACE   AGE
bookinfo               bookinfo-gateway   *             1        0      default     3d
[root@k8s-master istio-1.3.1]#

 

 

然后我们查看 istio 样例文件夹下面的文件：samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml 的内容

 

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - ratings
  http:
  - match:
    - headers:
        end-user:
          exact: jason
    fault:
      abort:
        percent: 100
        httpStatus: 500
    route:
    - destination:
        host: ratings
        subset: v1
  - route:
    - destination:
        host: ratings
        subset: v1

 

通过上面的这个 yaml 文件我们可以看出这个 VirtualService 资源对象配置了在 jason 登录时，reviews 对 ratings 访问时 100% 的返回一个500错误响应。

然后同样创建这个资源对象：(用 kubectl 或者 istioctl 工具都是可以的)

[root@k8s-master istio-1.3.1]# istioctl create -f samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml
Command "create" is deprecated, Use `kubectl create` instead (see https://kubernetes.io/docs/tasks/tools/install-kubectl)
Error: VirtualService.networking.istio.io "ratings" is invalid: []: Invalid value: map[string]interface {}{"apiVersion":"networking.istio.io/v1alpha3", "kind":"VirtualService", "metadata":map[string]interface {}{"creationTimestamp":"2019-11-11T07:52:19Z", "generation":1, "name":"ratings", "namespace":"default", "uid":"f87d423a-2c5d-4160-ab7f-e5246a10fc8e"}, "spec":map[string]interface {}{"hosts":[]interface {}{"ratings"}, "http":[]interface {}{map[string]interface {}{"fault":map[string]interface {}{"abort":map[string]interface {}{"httpStatus":500, "percentage":map[string]interface {}{"value":100}}}, "match":[]interface {}{map[string]interface {}{"headers":map[string]interface {}{"end-user":map[string]interface {}{"exact":"jason"}}}}, "route":[]interface {}{map[string]interface {}{"destination":map[string]interface {}{"host":"ratings", "subset":"v1"}}}}, map[string]interface {}{"route":[]interface {}{map[string]interface {}{"destination":map[string]interface {}{"host":"ratings", "subset":"v1"}}}}}}}: validation failure list:
spec.http.route.weight in body is required
[root@k8s-master istio-1.3.1]# vim samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml
[root@k8s-master istio-1.3.1]# vim samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml
[root@k8s-master istio-1.3.1]# kubectl apply -f samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml
virtualservice.networking.istio.io/ratings created
[root@k8s-master istio-1.3.1]# cat  samples/bookinfo/networking/virtual-service-ratings-test-abort.yaml
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - ratings
  http:
  - match:
    - headers:
        end-user:
          exact: jason
    fault:
      abort:
        percentage:
          value: 100.0
        httpStatus: 500
    route:
    - destination:
        host: ratings
        subset: v1
      weight: 1
  - route:
    - destination:
        host: ratings
        subset: v1
      weight: 1

 

 

现在我们回到 BookInfo 应用，登录 jason，刷新页面，可以看到下面的现象：

 

 

 

我们可以看到 reviews 对 ratings 的访问失败了

 

其他用户都访问正常