I'm trying to put together a query to show the average uptime of the sites
my blackbox exporter is polling.
So there's a metric probe_http_status_code that has the result code (eg.
200) of the probe.
Since BB is polling my sites every minute and I see 1440 values per day
and 40320 per 4weeks
count_over_time(probe_http_status_code{instance="https://www.mysite.com:443"}[4w])
I verified the status code is always 200
probe_http_status_code{instance="https://www.mysite.com:443"}
so in theory I should be able to calculate uptime percentage as:
sum_over_time(metric[4w]) / (200 * count_over_time(metric[4w]))
Why does this query shows uptimes >100%
100 *
((sum_over_time(probe_http_status_code{instance="https://www.mysite.com:443"}[4w])
/ (200 *
(count_over_time(probe_http_status_code{instance="https://www.mysite.com:443"}[4w])))))
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