Monitoring Prometheus itself with basic auth

[Hank Huang]

Hi there!

I followed the doc to configure Prometheus to monitor itself, and it works fine.

but then I added basic auth, and the metrics stop updating, and querying "up" returns 0.

at first, I suspected prometheus will also requires basic auth to scrape itself, so I added the same basic auth username/password to config file, but still no luck.

config file (prometheus.yml):

web config file (web.yml):

and I am launching Prometheus with the two config files (using prometheus 2.35.0 on windows):

.\prometheus.exe --config.file=prometheus.yml --web.config.file=web.yml

"up" returns 0:

Any insight is appreciated.

[Brian Candler]

You're giving the wrong password in the scrape job.

basic_auth:

  username: admin

  password: <PUT-THE-REAL-PASSWORD-HERE>

The value starting $2b$... is a *hash* of the password. This is fine to go in web.yml, since Prometheus will take the client-supplied password, hash it, and compare it with the stored hash.

But for the client which is making the connection, it must supply the actual password.