• 注入延时
• 注入故障

注入延时

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - nginx.example.com
  http:
  - match:
    - headers:
        end-user:
          exact: jason
    fault:
      delay:
        percentage:
          value: 100.0
        fixedDelay: 7s
    route:
    - destination:
        host: nginx.example.com
        subset: vm
  - route:
    - destination:
        host: nginx.example.com
        subset: docker

从服务网格上的vm来发起请求，可以看到会有7秒的延迟。

$ time curl -H "end-user: jason" nginx.example.com
Welcome to nginx on vm204!

real	0m7.015s
user	0m0.000s
sys	0m0.007s

查看某个Pod的route配置，可以看到会生成2条route记录，详细的信息可以查看ratings.json。

$ istioctl proxy-config route debian-77dc9c5f4f-qhtnh  --name 80
NAME     DOMAINS                               MATCH     VIRTUAL SERVICE
80       nginx.example.com                          /*        ratings.istio-demo
80       nginx.example.com                          /*        ratings.istio-demo

注入故障

kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
  - nginx.example.com
  http:
  - match:
    - headers:
        end-user:
          exact: jason
    fault:
      abort:
        httpStatus: 500
        percentage:
          value: 100
    route:
    - destination:
        host: nginx.example.com
        subset: vm
  - route:
    - destination:
        host: nginx.example.com
        subset: docker

从服务网格上的vm来发起请求，可以看到会返回500。

$ curl -i -H "end-user: jason" nginx.example.com
HTTP/1.1 500 Internal Server Error
content-length: 18
content-type: text/plain
date: Mon, 31 May 2021 11:57:46 GMT
server: envoy

fault filter abort