I'm checking the documentation for the DestinationRule, where there are several examples of a circuit breaking configuration, e.g:
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
name: bookinfo-app
spec:
host: bookinfoappsvc.prod.svc.cluster.local
trafficPolicy:
connectionPool:
tcp:
connectTimeout: 30ms
...
The connectionPool.tcp element offers a connectTimeout. However what I need to configure is a maximum response timeout. Imagine I want to open the circuit if the service takes longer than 5 seconds to answer. Is it possible to configure this in Istio? How?
Take a look at Tasks --> Traffic Management --> Setting Request Timeouts:
A timeout for http requests can be specified using the timeout field of the route rule. By default, the timeout is 15 seconds [...]
So, you must set the http.timeout in the VirtualService configuration. Take a look at this example from the Virtual Service / Destination official docs:
The following VirtualService sets a timeout of 5s for all calls to productpage.prod.svc.cluster.local service in Kubernetes.
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
name: my-productpage-rule
namespace: istio-system
spec:
hosts:
- productpage.prod.svc.cluster.local # ignores rule namespace
http:
- timeout: 5s
route:
- destination:
host: productpage.prod.svc.cluster.localhttp.timeout: Timeout for HTTP requests.