Hi Sebastian, Ah yes, the issue is that different data is available on the Prometheus side in alerting rules, than in notification templates on the Alertmanager side.
* For alerting rules, see: https://prometheus.io/docs/prometheus/latest/configuration/alerting_rules/#templating. So you only get: $labels, $externalLabels, and $value as variables. * For Alertmanager notification templates, you get a whole list of alerts with some more fields: https://prometheus.io/docs/alerting/latest/notifications/#data So if you want to access the ".StartsAt" field of an alert, you would have to access that from an Alertmanager notification template. As a very simplistic example, you could set the "html" field of an "email_config" in alertmanager.yml to something like this to range over all alerts in the notification and output the ".StartsAt" field for each of them: html: "{{ range .Alerts }}{{ .StartsAt }}<br/>{{ end }}" Of course in practice you probably also want to put in other alert info (labels, annotations, etc.) in that loop. See the default for the "html" field in https://github.com/prometheus/alertmanager/blob/main/template/email.tmpl as inspiration. Cheers, Julius On Wed, May 4, 2022 at 9:42 AM Sebastian Osztovits < [email protected]> wrote: > Hi, > As you have guessed I want to know the time when the alert first started > firing. > I simply tried adding the alerting rules as in example : > > > - alert: InstanceDown > expr: up == 0 > for: 5m > labels: > severity: critical > annotations: > timestamp: > > time: {{ .StartsAt }} > > Which leaves me with the error: > = <error expanding template: error executing template > __alert_InstanceDown: template: __alert_InstanceDown:1:90: executing > "__alert_InstanceDown" at <.StartsAt>: can't evaluate field StartsAt in > type struct { Labels map[string]string; ExternalLabels map[string]string; > Value float64 }> > > Regards, > Sebastian > > > > On Tuesday, May 3, 2022 at 9:47:25 PM UTC+2 [email protected] wrote: > >> Hi Sebastian, >> >> What error are you getting and what's your config? The first answer puts >> the current time of the evaluation of the alerting rule into the "time" >> annotation (which wouldn't necessarily be the time the alert started >> firing, but the last time it was still evaluated as firing). The second >> Stack Overflow answer is maybe more what you want, accessing the >> ".StartsAt" field of an alert directly from an Alertmanager notification >> template, and thus telling you when the alert first started firing. If you >> share what you already have (and which kind of timestamp you expect), maybe >> we can help you make it work. >> >> Regards, >> Julius >> >> On Tue, May 3, 2022 at 11:49 AM Sebastian Osztovits < >> [email protected]> wrote: >> >>> >>> Hello, >>> I'm currently using Alert manager 0.22.2 and Prometheus 2.18.1. >>> I have tried to alter my alert as shown in stack overflow post: >>> >>> >>> https://stackoverflow.com/questions/41069912/populating-a-date-time-in-prometheus-alert-manager-e-mail >>> yet i am met with an error message when doing so. >>> Does anyone have and email Template where they successfully added a >>> Timestamp? >>> Thanks in advance. >>> Best Regards, >>> Sebastian >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Prometheus Users" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/prometheus-users/e03a03be-4d88-4ded-b969-f36a06c469f2n%40googlegroups.com >>> <https://groups.google.com/d/msgid/prometheus-users/e03a03be-4d88-4ded-b969-f36a06c469f2n%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> >> >> -- >> Julius Volz >> PromLabs - promlabs.com >> > -- > You received this message because you are subscribed to the Google Groups > "Prometheus Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/prometheus-users/a2631779-dd7c-40fe-897e-7de27d8c7c0dn%40googlegroups.com > <https://groups.google.com/d/msgid/prometheus-users/a2631779-dd7c-40fe-897e-7de27d8c7c0dn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- Julius Volz PromLabs - promlabs.com -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/CAObpH5ypV_MYjQStHAQ3GW4ReKoDm3GKf8EM5fEGEWpw8PBt_A%40mail.gmail.com.
