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robinsillem
changed the title
503 response when scraping prometheus metrics in kubernetes with istio service mesh
500 response when scraping prometheus metrics in kubernetes with istio service mesh
Aug 1, 2024
Describe the bug
When running fluentd v1.17.0 within an istio service mesh attempts to scrape metrics fails with a 503 error and message "No async task available!"
N.B. istio aggregates the fluentd metrics with its own before presenting the results to prometheus
This behaviour does not occur with fluentd v1.16.5
To Reproduce
Deploy fluentd in an EKS cluster containing istio, so that the fluentd pods have istio sidecars
Exec into the proxy container and curl the aggregated_metrics endpoint
k exec -it fluentd-0 -c istio-proxy -n fluentd -- bash -c "curl -v http://localhost:24231/aggregated_metrics"
Expected behavior
The response contains the fluentd-* metrics, as it does when using the /metrics endpoint
Your Environment
Your Configuration
Your Error Log
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