Thanks,

Will this work if the target already had an instance and hostname label?

On Thu, May 21, 2020 at 5:37 PM Julien Pivotto
<[email protected]> wrote:
>
> On 21 May 14:33, Frank R wrote:
> > Alert templating question.
> >
> > I have an issue where some targets have a hostname label. When there is no
> > hostname label the instance label should be used.
> >
> > Would this work in a prometheus alert annotation:
> >
> > {{ or $labels.hostname $labels.instance }}
>
> I am not going to answer your question because I am using another trick
> to achieve this.
>
> In the prometheus config:
>
> alerting:
>  alert_relabel_configs:
>  - source_labels: [instance, hostname]
>    regex: "(.+);"
>    target_label: hostname
>    replacement: '$1'
>
> That way, prometheus will add a hostname label equal to the instance to
> every alert if it is empty.
>
> Regards,
>
>
> >
> > ?
> >
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>
>
> --
> Julien Pivotto
> @roidelapluie

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