I am trying to understand why prometheus is displaying the number of restarts as a decimal. If I have a query like: delta(kube_pod_container_status_restarts_total[2d]) >= 1 which shows number of restarts over a long duration the result is:
value
11.135802469135804
2.0408163265306123
2.23 pods restarted 1 or more times in the last 2 days. However they restarted a non-integer amount of times? Increasing the duration out further to 4 days doesnt change the values.
From the Prometheus documentation of the delta() function:
The delta is extrapolated to cover the full time range as specified in the range vector selector, so that it is possible to get a non-integer result even if the sample values are all integers.
So, it seems to be about the match between your range selector (2d) and the metric timestamps. If they don't line up, you get fractional values.