Configure Istio to generate Prometheus metrics

To configure Istio to generate Prometheus metrics, complete the following steps:

Refer to Prometheus and complete the setup instructions.
To confirm you configured Istio correctly, ensure the following metrics are available in Prometheus.
- istio_build

Request, error, and latency metrics

Metric	KPI
Request Counter istio_requests_total	Request Rate rate(istio_requests_total{reporter=“destination”}[5m])
Error Counter istio_requests_total	Error Ratio (server errors) rate(istio_requests_total{reporter=“destination”, response_code=~“5..”}[5m])/ rate(istio_requests_total[5m]) Error Ratio (client errors) rate(istio_requests_total{reporter=“destination”, response_code=~“4..”}[5m])/ rate(istio_requests_total[5m])
Latency Histogram istio_request_duration_milliseconds	Latency Average rate(istio_request_duration_milliseconds_sum[5m])/ rate(istio_request_duration_milliseconds_count[5m]) Latency P99 histogram_quantile ( 0.99, sum(rate(istio_request_duration_milliseconds_bucket[5m]) > 0) by (le) )

Metric

KPI

Request Counter

istio_requests_total

Request Rate

rate(istio_requests_total{reporter=“destination”}[5m])

Error Counter

istio_requests_total

Error Ratio (server errors)

rate(istio_requests_total{reporter=“destination”, response_code=~“5..”}[5m])/ rate(istio_requests_total[5m])

Error Ratio (client errors)

rate(istio_requests_total{reporter=“destination”, response_code=~“4..”}[5m])/ rate(istio_requests_total[5m])

Latency Histogram

istio_request_duration_milliseconds

Latency Average

rate(istio_request_duration_milliseconds_sum[5m])/ rate(istio_request_duration_milliseconds_count[5m])

Latency P99

histogram_quantile (
0.99,
sum(rate(istio_request_duration_milliseconds_bucket[5m]) > 0)
by (le)
)

Metric	KPI
Network Bytes Received istio_request_bytes_sum Network Bytes Transmitted istio_response_bytes_sum	Data transfer rate rate(istio_request_bytes_sum[5m) rate(istio_response_bytes_sum[5m)

Metric

KPI

Network Bytes Received

istio_request_bytes_sum

Network Bytes Transmitted

istio_response_bytes_sum

Data transfer rate

rate(istio_request_bytes_sum[5m)

rate(istio_response_bytes_sum[5m)

KPI	Alert
Request Rate	RequestRateAnomaly
Error Rate	ErrorRatioBreach ErrorBuildup based on a 99.9 SLO
Latency Average Latency P99	LatencyAverageBreach LatencyAverageAnomaly LatencyP99ErrorBuildup
Network Bytes	ResourceRateAnomaly