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syepes / network_exporter

ICMP / Ping & MTR & TCP Port & HTTP Get - Network Prometheus exporter
Apache License 2.0
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Panels display issues #11

Closed niyaodong closed 1 year ago

niyaodong commented 3 years ago

Hi syepes,

It's me again...

I'm looking forward to deploying network_exporter in the production env as my leader was very satisfied with the monitoring stack. But I found something I am not able to deal with. so that I post it here.

  1. It's not an issue. I would like to sort the items by ttl. I looked up a lot of information but couldn't find a way to do it. image

  2. Even if the node is unreachable, the panel still shows it. In the time range shown below, hops 3-7 areunreachable, but they keep the same value like a straight line until they became reachable. this issue is not relevant to network_exporter as I checked network_exporter metircs were OK. Could it be caused by Victoriametrics? image

  3. Invalid nodes will still be displayed. As the panel shown below, we can see the hop 11 keeps updating. As I understand, currently the hop 11 should be "unknown" as the MTR shown below. image image

niyaodong commented 3 years ago

I found that issue 2 is solved if I delelte "keep_last_value" on panel Metrics browser setting.

sort(keep_last_value(avg_over_time(mtr_rtt_seconds{host=~"$station",name=~"$name_mtr", type="mean"}[$__interval])))

This is the explanation of “keep_last_value”，but I don't know the difference if I delete it.

keep_last_value(q) fills gaps with the value of the last non-empty point in every time series returned by q.

image image

syepes commented 1 year ago

old