Greetings Prometheus users,
I have a function that is called a few times *within a loop*, and my idea
was that the function would populate the .prom file by adding a new line
every time, with the same metric name but with a different label. For
example:
sv_api_response{method="getUserByID"} 1
sv_api_response{method="getUserByName"} 1
Etc. (1 when the API sends a 200 response, 0 otherwise)
But that doesn't happen. When the loop ends, I have only one line in the
file, with the last written metric. Each time a new metric is written, it
overwrites the previous one. My function is as follows:
*from prometheus_client import CollectorRegistry, Gauge, write_to_textfile*
*...*
*def write_metric(method, expectation, response, region):*
* registry = CollectorRegistry()*
* gauge = Gauge('sv_api_response', '1 if API is up', ['method'], *
*registry=registry)*
* if response is not None:*
* if response.status_code == expectation:*
* gauge.labels(method).set(1)*
* else:*
* gauge.labels(method).set(0)*
* else:*
* gauge.labels(method).set(0)*
* write_to_textfile('/opt/node_exporter/textfile_collector/sv.prom',
registry)*
Is there a way to make it preserve the metrics that it adds to the file and
simply append the new ones?
Thank you.
Regards,
Daniel
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