Prometheus / Blackbox_exporter not allowing 401 from a target

[srikanth rangan]

Hi all,

I have a case wherein I have to poll a target and its normal for the site to send me "401" code.

However, when I add the entries in prometheus.yml and a new module in blackbox_exporter.yml, prometheus does not like the 401 error and does not seem to use the blackbox_exporter at all. (I've started the blackbox on debug, on command line and its not printing anything)

/etc/prometheus/prometheus.yml :

.....

  - job_name: 'IDAHO_SERVICE_SVN_AND'

    metrics_path: /svn/idaho-config/PROD

    scrape_interval: 10s

    params:

      module: [http_401_unauth]

    static_configs:

      - targets: ['10.131.104.193']

        labels:

           group: 'IDAHO_SERVICE'

           service: 'IDAHO_SERVICE_SVN_AND'

/etc/blackbox_exporter/blackbox_exporter.yml:

...

modules:

  http_401_unauth:

    prober: http

    http:

      valid_status_codes: [401,200,409]

The error that I'm getting is :server returned HTTP status 401 Unauthorized 

It looks like Prometheus is reporting the 401 error even before asking blackbox_exporter to probe it?

Can anyone please help me understand the error ?

Thanks in advance.

Regards

Srikanth

[srikanth rangan]

I got it to work finally.

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[Rupendra Sen]

Can you provide the solution?

[Julius Volz]

Just judging from the Prometheus config above, Prometheus was scraping the 401 status code targets directly, vs. probing them through the blackbox exporter, since the necessary relabeling rules (https://github.com/prometheus/blackbox_exporter#prometheus-configuration) for that were missing.

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Julius Volz

PromLabs - promlabs.com

[Navya Krishna Dubbala]

Hi  srikanth ,

Could you share the solution.

On Tuesday, 29 December 2020 at 02:55:01 UTC+5:30 srikanth rangan wrote: