CRITICAL issue: reviews.default.svc.cluster.local service returns 100% 503 errors due to misconfigured service selector

[peterj]

Service: reviews.default.svc.cluster.local
Time: Recent 5 minutes

Issue Summary:

• The service is returning 100% 503 errors (service unavailable).
• Request rate: ~1.87 req/s
• Root cause: The Kubernetes service selector is misconfigured with label "app=rebviews" instead of "app=reviews".

Impact:

• All requests to the reviews service fail to reach the pods due to incorrect selector.

Recommendations:

1. Correct the selector label in the service spec to "app=reviews".
2. Check reviews pods health and logs after fixing selector.
3. Review recent deployment or configuration changes.

PromQL for error percentage monitoring:
sum(rate(istio_requests_total{destination_service="reviews.default.svc.cluster.local",response_code=~"5.."}[5m])) / sum(rate(istio_requests_total{destination_service="reviews.default.svc.cluster.local"}[5m])) * 100

Please prioritize fixing the service selector to restore reviews service availability.