August 2019
Intermediate to advanced
256 pages
6h 43m
English
book
Hands-On Enterprise Java Microservices with Eclipse MicroProfile
by Cesar Saavedra, Heiko W. Rupp, Jeff Mesnil, Pavol Loffay, Antoine Sabot-Durand, Scott Stark
Content preview from Hands-On Enterprise Java Microservices with Eclipse MicroProfile
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Fault injection in the service mesh
Istio lets you inject faults into the results pretty easily. This sounds counterproductive at the start, but can be a very nice way of testing that you get the fault tolerance handling right. The following VirtualService for Istio defines such fault injection:
apiVersion: networking.istio.io/v1alpha3kind: VirtualServicemetadata: name: fault-injection-servicespec: hosts: - myTarget http: - route: - destination: host: myTarget fault: abort: httpStatus: 404 percent: 20 delay: percent: 50 fixedDelay: 200ms
Istio will hear for calls to the destination host, myTarget, and send a 404 response for 20% of the calls instead of the real response code. On top of this, it will delay every other response by 200 milliseconds. ...
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