Hi Jason,
Prometheus uses the RE2 regular expression dialect, you can find the
documentation about that here: https://github.com/google/re2/wiki/Syntax
The double backslash ("\\") is just to escape the one backslash in the
Prometheus string. So the actual regex is just "5\\d{2}". You can remove
the escaping by using backticks as quotes, which do not interpret escape
sequences: `5\d{2}`
Kind regards,
Julius
On Tue, Oct 3, 2023 at 12:03 PM 'Jason' via Prometheus Users <
prometheus-users@googlegroups.com> wrote:
> On 03.10.2023 10:55, Stuart Clark wrote:
> > In reality both will do the same thing, although the second is
> > technically more correct.
> >
> > The first regular expression is matching "5" followed by 1 or more other
> > characters, while the second is matching "5" followed by exactly 2
> > numbers. So the first one would also match "50" or "5frogs" which aren't
> > valid status codes, but in reality your application would have to be
> > having serious problems to be setting those values anyway.
>
> Thanks Stuart
>
> Is there any docs about this type of regex? I didn't found "\\d" in
> official docs.
>
> How is this regex called?
>
> cheers
> Jason
>
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--
Julius Volz
PromLabs - promlabs.com
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