server>$ sudo docker exec -it pmm-server tail -f /var/log/prometheus.log
time="2018-05-03T19:30:09Z" level=warning msg="Error on ingesting out-of-order samples" numDropped=2 source="scrape.go:534" 
time="2018-05-03T19:30:09Z" level=warning msg="Scrape health sample discarded" error="sample timestamp out of order" sample=up{instance="ove-parkinglot-qa201", job="mysql"} => 1 @[1525375808.639] source="scrape.go:587" 
time="2018-05-03T19:30:09Z" level=warning msg="Scrape duration sample discarded" error="sample timestamp out of order" sample=scrape_duration_seconds{instance="ove-parkinglot-qa201", job="mysql"} => 0.923145966 @[1525375808.639] source="scrape.go:590" 
time="2018-05-03T19:30:09Z" level=warning msg="Scrape sample count sample discarded" error="sample timestamp out of order" sample=scrape_duration_seconds{instance="ove-parkinglot-qa201", job="mysql"} => 0.923145966 @[1525375808.639] source="scrape.go:593" 
time="2018-05-03T19:30:09Z" level=warning msg="Scrape sample count post-relabeling sample discarded" error="sample timestamp out of order" sample=scrape_duration_seconds{instance="ove-parkinglot-qa201", job="mysql"} => 0.923145966 @[1525375808.639] source="scrape.go:596" 
time="2018-05-03T19:30:10Z" level=warning msg="Error on ingesting out-of-order samples" numDropped=2 source="scrape.go:534" 
time="2018-05-03T19:30:10Z" level=warning msg="Scrape health sample discarded" error="sample timestamp out of order" sample=up{instance="ove-production-qa501", job="mysql"} => 1 @[1525375809.221] source="scrape.go:587" 
time="2018-05-03T19:30:10Z" level=warning msg="Scrape duration sample discarded" error="sample timestamp out of order" sample=scrape_duration_seconds{instance="ove-production-qa501", job="mysql"} => 1.079648197 @[1525375809.221] source="scrape.go:590" 
time="2018-05-03T19:30:10Z" level=warning msg="Scrape sample count sample discarded" error="sample timestamp out of order" sample=scrape_duration_seconds{instance="ove-production-qa501", job="mysql"} => 1.079648197 @[1525375809.221] source="scrape.go:593" 
time="2018-05-03T19:30:10Z" level=warning msg="Scrape sample count post-relabeling sample discarded" error="sample timestamp out of order" sample=scrape_duration_seconds{instance="ove-production-qa501", job="mysql"} => 1.079648197 @[1525375809.221] source="scrape.go:596" 


ETC