Reloading DNS IPs in prometheus

[eswar yaga]

Hi,

My configuration uses a DNS like this

 - job_name: 'app-dev'

metrics_path: '/federate'

params:

'match[]':

- "{__name__ =~ '^.+'}"

static_configs:

- targets: ['app-dev-prom.localdns.myaddress.com']

But When the DNS points to a new IP of APP server, DNS looks sticky and still scraping from old IP 

Is there any way to refresh IPs with out restarting server

Thanks

Eswar

[Matthias Rampke]

What is the TTL on these records?

Also consider using DNS SD, it gives you slightly more control over the refresh cycle.

/MR

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[Julien Pivotto]

Prometheus uses keep alive, so we never refresh DNS until the instance
is really down.

For that use case you should use DNS-SD.

On 17 Jan 23:09, Matthias Rampke wrote:
> What is the TTL on these records?
>
> Also consider using DNS SD, it gives you slightly more control over the
> refresh cycle.
>
> /MR
>
> On Fri, Jan 15, 2021, 14:33 eswar yaga <eswar...@gmail.com> wrote:
>
> >
> > Hi,
> >
> > My configuration uses a DNS like this
> >

> > *- job_name: 'app-dev'*
> > *metrics_path: '/federate'*
> > *params:*
> > *'match[]':*
> > * - "{__name__ =~ '^.+'}"*
> > *static_configs:*
> > * - targets: ['app-dev-prom.localdns.myaddress.com
> > <http://app-dev-prom.localdns.myaddress.com>']*

> >
> > But When the DNS points to a new IP of APP server, DNS looks sticky and
> > still scraping from old IP
> >
> > Is there any way to refresh IPs with out restarting server
> >
> > Thanks
> > Eswar
> >
> > --
> > You received this message because you are subscribed to the Google Groups
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> > To view this discussion on the web visit
> > https://groups.google.com/d/msgid/prometheus-users/3dc8c408-6684-4c53-af51-ea27fe8a24cen%40googlegroups.com

> > <https://groups.google.com/d/msgid/prometheus-users/3dc8c408-6684-4c53-af51-ea27fe8a24cen%40googlegroups.com?utm_medium=email&utm_source=footer>
> > .

> >
>
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Julien Pivotto
@roidelapluie

[eswar yaga]

But DNS-SD serves different purpose right. Can I use DNS-SD for normal prometheus app end points like (abc.app.com/metrics)

But  I need this for  federate.. 

OR Is there any way I can refresh DNS cache on prometheus server apart from DNS-SD

Thanks