On Thu, 20 Aug 2020 16:08:43 -0400 "Sven F." <sven.falem...@gmail.com> wrote:
> Dear readers, > > I recently find myself using Prometheus database, > I found about the perl `binding` Net::Prometheus > > Net::Prometheus provides a way to export metrics to > the databases. > > The Any::Metrics generalize the concept to make perl code > not 'glued' to Prometheus. ITYM Metrics::Any > Net::Prometheus provides a few metrics which are linux dependant, > in Net::Prometheus::ProcessCollector::linux > For example , the Package is using the `/proc/$pid/fd` info . > > Perl posses an abstract for processes with Proc::ProcessTable::Process > but this , just like the 'ps' command, lacks the amount of file > opened by a process (which could be quite helpful, this resource > is limited). > > Personally I will -unless strongly advised against- > write a XS package to get that metric in OpenBSD > with kvm_getfiles. > > The only way i currently know to get this info is using `fstat $pid | > wc -l`, fstat , being a lsof in bsds. > > BSD::Process does not have this either but is using the 'kvm' system. > > Linking all of this may create too many dependencies, > nevertheless I know some perl code could be quite smart to > opt in certains sub routines if the right module is available . > So this could be done through 'soft' dependencies. - I do not know > what you call those packages that are optional but work together. If it's an optional dependency that opportunistically loads and works if available, that should be fine. > Of course i will have to name the package, i saw OpenBSD::Checkpass > so it could be OpenBSD::Kvm_getfiles > But it also is a specific implementation so if > Proc::ProcessTable::Process::Files ( which would be the number of > file open and maybe some limits info like the one found in the class > limits/login.conf ) It would look like > Proc::ProcessTable::Process::OpenBSD which seems way too long. > > So i guess OpenBSD::Kvm_getfiles is completely enough > Especially since BSD::Process is not OpenBSD compatible > and freebsd use procstat_getfiles while openbsd use kvm_getfiles. > > Thank you for reading that far, stay safe and > have a good one. I don't have any specific suggestions about OpenBSD, but overall having some process metrics exported from OpenBSD would be good. Whatever's available - don't feel you *have* to support every single one as an exact copy of the Linux ones. Just do whatever makes sense there - different OSes can differ slightly in shape and that's fine. Maybe have a look around some other Prometheus client libs for other langauges, and see if they have any OpenBSD support. Try to copy what they do - different language clients on the same OS should act the same. Maybe also try asking in #prometheus on Freenode. -- Paul "LeoNerd" Evans leon...@leonerd.org.uk | https://metacpan.org/author/PEVANS http://www.leonerd.org.uk/ | https://www.tindie.com/stores/leonerd/
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