convert prometheus ssl expiry time from epoch unix time to human readable in alerts

[Jyotir Bhandari]

Hi,

I have integrated alerts with slack and I want ssl expiry to show date/time in human readable format.

Currently the value with I am getting in slack is something like 5.023386e+06

My configuration alerts look like this.

alerts :

- alert: SSLExpiry

    expr: probe_ssl_earliest_cert_expiry{job="blackbox"} - time() < 86400 * 60

    for: 5m

    labels:

      severity: critical

      value: '{{ $value }}'

    annotations:

      description: '{{ $labels.instance }} of job {{ $labels.job }} is SSL EXPIRING

        SOON'

      summary: Instance {{ $labels.instance }}, SSL Expiring Soon

Regards,

Jyotir

[Ben Kochie]

What your're looking for is {{ $value | humanizeDuration }}

Take a look at our version of this: https://gitlab.com/gitlab-com/runbooks/blob/master/alerts/ssl-certificate-expiration.rules

The reference doc is a little obscure, but it can be found here:

https://prometheus.io/docs/prometheus/latest/configuration/template_reference/

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[Jyotir Bhandari]

Thanks that was what I was looking for.

For reference: 

 - alert: SSLExpiry

    expr: probe_ssl_earliest_cert_expiry{job="blackbox"} - time() < 86400 * 60

    for: 5m

    labels:

      severity: critical

      value: '{{ $value | humanizeDuration }}'

    annotations:

      description: '{{ $labels.instance }} of job {{ $labels.job }} is SSL EXPIRING

        SOON'

      summary: Instance {{ $labels.instance }}, SSL Expiring Soon

Jyotir

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