bookinfo/

Book info sample app

This app has been adapted from Istio's sample app

Summary of changes

Some of the images in bookinfo.yaml have been adapted for the testing needs of Supergloo.

Changes are summarized below.

reviews v4: Propagation of failure in review service

• purpose:

  • example of a non-robust service: it produces 500's when one of the services that it interacts with produces a bad response.

• description:

  • failures in requests from the review service to the rating service produce failures (500 responses) in requests from the product page to the review page

• diagram:

  • product <-a-> reviews:v4 <-b-> ratings
  • condition: no faults
    • description: weak point is "hidded" (not expressed)
    • result: reviews service behaves in same manner as reviews:v3
  • condition: fault in route b
    • description: weak point is expressed, cascading failure results
    • result: error is propagated to route a
    • preferred behavior: the reviews service should be able to provide a valid response even if it encounters errors from the ratings service

Initial setup

• note that the reviews and ratings are shown

supergloo init
kubectl label namespace default istio-injection=enabled
supergloo install istio --name istio --installation-namespace istio-system --mtls=true --auto-inject=true
kubectl apply -f bookinfo.yaml
supergloo apply routingrule trafficshifting \
    --name reviews-v4 \
    --dest-upstreams supergloo-system.default-reviews-9080 \
    --target-mesh supergloo-system.istio \
    --destination supergloo-system.default-reviews-v4-9080:1
kubectl port-forward -n default deployment/productpage-v1 9080
## OPEN localhost:9080 in your browser - see the "baseline" app

What does it look like when reviews fail

• note that neither reviews nor ratings are shown

supergloo apply routingrule faultinjection abort http \
    --target-mesh supergloo-system.istio \
     -p 100 -s 500  --name fault-product-to-reviews \
    --dest-upstreams supergloo-system.default-reviews-9080
## RELOAD PAGE - Expect error from reviews
# cleanup:
kubectl delete routingrule -n supergloo-system fault-product-to-reviews
## RELOAD PAGE - Expect errors to have gone away

Trigger the weakness

• note, again, that neither reviews nor ratings are shown

supergloo apply routingrule faultinjection abort http \
    --target-mesh supergloo-system.istio \
     -p 100 -s 500  --name fault-reviews-to-ratings \
    --dest-upstreams supergloo-system.default-ratings-9080
## RELOAD PAGE - Expect reviews to fail in the same manner

Replace the weak service with a more robust version

• note that reviews show without ratings

kubectl delete routingrule -n supergloo-system reviews-v4
supergloo apply routingrule trafficshifting \
    --name reviews-v3 \
    --dest-upstreams supergloo-system.default-reviews-9080 \
    --target-mesh supergloo-system.istio \
    --destination supergloo-system.default-reviews-v3-9080:1
## RELOAD PAGE - Expect failure to be more graceful, reviews information is shown without the ratings