Load metrics from file (or anything else)

[Mircea]

Hello,

This might be a silly question, but here I am: I would need to enable persistence for some metrics (looks like the push gateway might be a no-go for now) and I was thinking to have my app dump the metrics, say into a file (e.g., using the write_to_textfile function) - then when the app restarts to firstly attempt to load the metrics from there, so it ensures continuity. I understand this doesn't sound like the most ideal scenario, but such are the constraints am afraid... Anyway, so what I'm asking basically is if there's a way, or anyone is aware, of the counter-part of the write_to_textfile function to load the metrics from text into the registry.

Thanks!

[Stuart Clark]

Your metrics are being stored in Prometheus so this shouldn't be necessary.

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.

[Jake Utley]

Why are you trying to persist your metrics? If it's to preserve counters, this is unnecessary. PromQL functions that operate on counters (such as rate) will gracefully handle cases where the counter restarts.

[Mircea Ulinic]

Thanks for your answers both! To clarify, I am looking on the
Prometheus client side. The metrics are not counters or anything that
can be exported straight away, rather based on some "events" (e.g., a
file has been changed, etc. -- even in an example like that, I would
need the app, after restart, to continue counting from the value it
was before restart; note that it is not about targeting one specific
file, therefore I'm talking about some more "dynamic" metrics
depending on what file gets changed - so that needs to continue being
reported in the metrics after restart). Please let me know if my
example doesn't make much sense, and I'll try to find a more eloquent
case. Cheers!

On 2/21/20, Jake Utley <jut...@hiya.com> wrote:
> Why are you trying to persist your metrics? If it's to preserve counters,
> this is unnecessary. PromQL functions that operate on counters (such as
> rate) will gracefully handle cases where the counter restarts.
>
> On Friday, February 21, 2020 at 9:21:47 AM UTC-8, Stuart Clark wrote:
>>
>> Your metrics are being stored in Prometheus so this shouldn't be
>> necessary.
>>
>> On 21 February 2020 17:15:18 GMT, Mircea <mircea...@gmail.com

>> <javascript:>> wrote:
>>>
>>> Hello,
>>>
>>>
>>> This might be a silly question, but here I am: I would need to enable
>>> persistence for some metrics (looks like the push gateway might be a
>>> no-go
>>> for now) and I was thinking to have my app dump the metrics, say into a
>>> file (e.g., using the write_to_textfile function) - then when the app
>>> restarts to firstly attempt to load the metrics from there, so it ensures
>>>
>>> continuity. I understand this doesn't sound like the most ideal scenario,
>>>
>>> but such are the constraints am afraid... Anyway, so what I'm asking
>>> basically is if there's a way, or anyone is aware, of the counter-part of
>>>
>>> the write_to_textfile function to load the metrics from text into the
>>> registry.
>>>
>>>
>>> Thanks!
>>>
>>>
>> --
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>>
>

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--
-Mircea

[Rufus Buschart]

Hi Mircea!

Did you find a solution to your problem? I'm looking into a somewhat similar scenario.

/Rufus