HTTP status 503 service unavailable: json_exporter with basic_auth

[ksivap147]

trafficstars

Hi, I'm getting below error on prometheus console log while scraping metrics from json_exporter. Target endpoint is available and able to get response with curl using basic authentication.

ts=2022-04-18T20:58:07.156Z caller=scrape.go:1292 level=debug component="scrape manager" scrape_pool=json target="http://localhost:7979/probe?target=http%3A%2F%2Flocalhost%3A9015%2Fservices%2Fv2%2Fmpoints%2FE_TIP5%2Fstatistics" msg="Scrape failed" err="server returned HTTP status 503 Service Unavailable"

Could you please help me, how to debug this issue? Is it possible to try with curl to see verbose?

Here is the prometheus.yaml

scrape_configs:

gather metrics of prometheus itself

• job_name: prometheus static_configs:

  • targets:
    • localhost:9090

  gather the metrics of json_exporter application itself

• job_name: json_exporter static_configs:

  • targets:
    • localhost:7979 ## Location of the json exporter's real :

  gather the metrics from third party json sources, via the json exporter

• job_name: json scrape_interval: 15s scrape_timeout: 10s metrics_path: /probe basic_auth: username: XXXXXX password: XXXXX static_configs:

  • targets: ['http://localhost:9015/services/v2/mpoints/E_TIP5/statistics'] relabel_configs:
  • source_labels: [address] target_label: __param_target
  • source_labels: [__param_target] target_label: instance
  • target_label: address replacement: localhost:7979 ## Location of the json exporter's real :

[ksivap147]

it worked after adding the below code to util.go to pass credentials to target end point. 
if req.Header.Get("Authorization") == "" {
	req.Header.Add("Authorization", "Basic XXXXXXXX")
} else {
	fmt.Println("Authorization", req.Header.Get("Authorization"))
}

Why json_exporter is not supporting basic_auth by default?

[david-loe]

You have to set the basic_auth in the exporter config and not at prometheus: https://github.com/prometheus-community/json_exporter/blob/master/examples/config.yml

uncomment the http_client_config including basic_auth.

[R-Studio]

@david-loe When I use a custom resource Probe for this, does .spec.basicAuth work?