What happens to the metrics when an NFS mount is in hung state? I believe that if a NFS is in hung state, the node_exporter will stop scraping the metrics until the mount become normal again, because if node_exporter keeps trying to scrape metrics from a hung mount, it will eventually lead to node_exporter going down itself? I am right here? And if I am, then can we safely say that whenever node_exporter stop giving metrics for a NFS mount, it is necessarily because the mount is in hung state?
On Tuesday, March 3, 2020 at 10:23:10 PM UTC+5:30, Matthias Rampke wrote: > > The trouble is that the only sure way to know if MFS hangs is to try and > use it. For one, the node exporter is not a health prober per se, bur more > importantly, when NFS does hang, this leaves a thread permanently stuck in > an uninterruptible syscall. Very soon the exporter would run out of threads > and stop working altogether. For the same reason, do not put textfile > metrics files on NFS. > > I believe the only way to do this safely is a separate check script/loop. > Don't start the script with cron, you need to make sure that once it is > stuck it stops trying until it is unstuck again, or you will fill up your > process table with stuck processes that cannot be killed. > > /MR > > > On Tue, 3 Mar 2020, 16:54 Yagyansh S. Kumar, <[email protected] > <javascript:>> wrote: > >> Hello experts. >> I want to check if the NFS is hanged(i.e whether it is accessible from >> the server or not, and if yes then what is the response time it is >> getting). I have already enabled the nfs and nfsd collectors, but haven't >> found any that can accurately tell me every time the NFS hangs. Any help >> would be appreciated. >> Thanks in advance. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Prometheus Developers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:> >> . >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/prometheus-developers/1b166f35-fdb0-44fe-9fda-294fcde864f5%40googlegroups.com >> >> <https://groups.google.com/d/msgid/prometheus-developers/1b166f35-fdb0-44fe-9fda-294fcde864f5%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > -- You received this message because you are subscribed to the Google Groups "Prometheus Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-developers/545809e6-689a-4d6f-ac9e-20e93f5ba7e8%40googlegroups.com.
