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With this
outOfOrderTimeWindow:5s
we experienced Federator Target down with errorsample too old
.Investigated this error also in this issue prometheus/prometheus#11602, which brings me to this setting of
outOfOrderTimeWindow:60m
(1h!!!). With that Federator Target is up and metrics have no dropouts anymore.Nevertheless the
scrape_interval
was 10s, which is more or less useless if Kubelet Cluster metrics are only scraped each 30s. So let's change the default value for federate to 60s. This can be overwritten, of course.