Ultimate Prometheus - Udemy Additonal Resources - https://prometheus.io/docs/prometheus/latest/querying/examples/

Starting Prometheus D:\softwares\prometheus-2.22.1.windows-amd64>prometheus.exe --config.file=prometheus.yml

http://localhost:9090

Graph (menu)

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select : prometheus_http_requests_total and click on execute shows all metrics related to different handlers Select Graph also select : prometheus_http_requests_total[5m] and execute to see for 5 mins

up shows instances that are up

Type of Metrics

**Counter - **

Used to see total number of request a handler received Total number of Errors

Gauage

Shows value going up and down

**Example: **

Usage of CPU, Memory, hard disk Number of elements in a queue

Histograms

Used to estimate quantiles Mainly used with request latencies

Summary

More accurate quantile Calculate more quantiles on client side slows your app but lighter for prometheus

Go client Integration

Alerts Menu show alerts

Status: performance related details

Status -> Command Line Flags (commands we can run prometheus with)

Status -> Rules

Status -> Targets show all targets that we are scrapping (We only have prometheus here at the moment)

http://localhost:9090/metrics (Clicking on this shows all the metrics prometics can scrap)

Service Discovery

useful when we use kubenetes..