I don't know what you mean by "wrong alerts", but I use the following:
- alert: rebootNode
expr: node_boot_time_seconds > (node_boot_time_seconds offset 5m +
5)
labels:
severity: warning
annotations:
summary: 'Device rebooted at {{ $value | humanizeTimestamp }}'
On Wednesday, 27 April 2022 at 15:43:20 UTC+2 [email protected] wrote:
> Hello,
>
> I would like to monitor reboot of the server, when server reboots need to
> send alert via alertmanager.
>
> Currently I am using following expression
> expr: rate(node_boot_time{job="kubernetes-service-endpoints"} [1h])*
> on(instance) group_left(nodename)
> group(node_uname_info{})by(instance,nodename)>0 or
>
> rate(node_boot_time{job="kubernetes-service-endpoints"} [1h])>0
>
> But I can see wrong alerts are keep populating in my mail box.
>
> Could you please provide me expression we can use other than what I had
> used.
>
> Thanks
> DV
>
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