Hello, Prometheus Users!
I'm wondering if someone might be able to help me out with something I'm
currently struggling with.
I have a metric based on alertmanager active alerts. It looks like
"*active_alerts{alert_name='cpu_load',
node='node01'*}". This metric is of intermittent type - if there is an
alert active, then it can be found on the scrape target otherwise, it is
missing. This makes it a bit complicated to handle.
I would like to count how many times an alert has triggered in a certain
period of time.
The total amount of samples of this metric in a certain interval can be
found with '*count_over_time*'. I want to know though how many times an
alert has triggered. This means I want to count only the times when the
metric has appeared. So, given 2 consecutive scrapes, if the first scrape
is not giving the metric and the second scrape gives it, then it should
count, otherwise not.
I tried various approaches to this, but didn't get it. *changes*() or
*delta*() are hard to use due to the intermittent nature of the metric.
Does anybody have a hint for me?
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