I have set alerts for Disk usage and now I want set alerts for Memory usage but I am not able to set it is giving error FAILED TO TEST RULE. Axes B is used and Axes C is Total.
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Previously I have added alert for disk usage and now trying to add for memory usage in same dashboard. – Jan 24 '19 at 12:30
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In terms of defining an alert, I think you are doing it correctly.
Looking at Grafana's source code here. The error message "Failed to test rule" seems to be a nasty one as it is returning a http 500 code, which means "internal server error".
In other words, this is possibly a Grafana server bug. Probably raise it with the Grafana team here with the steps to replicate.
Samuel Toh
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I just checked my Data Source it was $datasource and I am using influxDB so I changed it to influxDb.
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So there's no way to have a paramerized data source in an alert? I have multiple stacks to alert on. – Tanya Branagan Aug 26 '20 at 13:37
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I recommend to change the avg() in your Conditions.
Set it to last(). So it takes only the last value for your alert.
Mike
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I tried it by changing `avg()` to `last()` but it is still giving me same error. – Jan 27 '19 at 05:26
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Are you using template variables in your Query B? If yes this could be the problem. I had the same issue. Grafana isn't able to do Alerting with template variables. have a look at this: https://github.com/grafana/grafana/issues/6557 – Mike Jan 28 '19 at 07:52