Updated 05/2012: Graph Sockets Pipes and FIles

[scottevil]

Since everything in Linux/Unix is a file, Linux has some interesting ways to monitor for problems. Often systems administrators monitor CPU, Ram, Disk Space, and Network Usage. These are all valid data points and are especially useful for capacity planning. For real time detection of problems, especially with web/application/databases, these are not always the best indicators. In my experience, checking and trending the number of open sockets, pipes, files, tcp/udp sockets, and unix sockets has been the single best indicator of a problem. These have been much better than CPU, Load, or I/O Wait. In fact, under optimal usage of server hardware, one would expect spikes in CPU, RAM, and I/O.

Instructions: http://crunchtools.com/software/cruncht ... pes-files/
Versioned Code: http://code.google.com/p/crunchtools/so ... ipes_files

[Linegod]

If you get a chance, please post this to the scripts and templates area:

http://docs.cacti.net/scripts
http://docs.cacti.net/scripts.guidelines

http://docs.cacti.net/templates
http://docs.cacti.net/templates.guidelines

[spackler]

The sh/exec functionality appears to have been removed from the ubuntu distributions in favor of keyword extend. Extend also isn't a drop in replacement, the OID's get fairly screwy and the trick of executing the netstat calls in the background no longer works which can hang cacti.

These two threads go into greater detail.
http://www.mail-archive.com/net-snmp-us ... 14895.html
http://www.mail-archive.com/net-snmp-us ... 14731.html

[Linegod]

The sh/exec functionality appears to have been removed from the ubuntu distributions in favor of keyword extend.

Nothing to do with Ubuntu. net-snmp deprecated exec some time ago.

[scottevil]

The sh/exec functionality appears to have been removed from the ubuntu distributions in favor of keyword extend. Extend also isn't a drop in replacement, the OID's get fairly screwy and the trick of executing the netstat calls in the background no longer works which can hang cacti.

These two threads go into greater detail.
http://www.mail-archive.com/net-snmp-us ... 14895.html
http://www.mail-archive.com/net-snmp-us ... 14731.html

Yeah, I knew this was coming because I had tested in fedora with newer versions of net-snmpd and it was complaining. I looked at the fix a while back and you are correct, it is a bit screwy to say the least. I will mess with it and update it.

Scott M

[scottevil]

Alright, I finally updated this to work despite the deprecated sh/exec directive. It was actually quite hilarious that one can code around this problem by using a C or Perl AgentX module. I used an embedded version of the perl module so the configuration is almost exactly as easy as before. It is one directive, one server side file, and one client side file.

[WooLaf]

This project looks very interesting. I notice there are client and server scripts, since I only need to monitor a local server I will try to make it work. Does anyone test this on localhost?

[scottevil]

I have used it on localhost through snmp, but you could probably tweak it to work with the scripts only.

[PeterPalm]

$tmp is not yet used while reading the files, it still uses /var/lib/net-snmp.

[mase2hot]

I get the following error when trying to run this script.

Can't call method "register" on an undefined value at /etc/snmp/spf.pl line 97.

[Wirthmueller]

I tried to install these templates - unfortunately the spf.pl script gives the following error:

Code: Select all

Can't locate NetSNMP/agent.pm in @INC (you may need to install the NetSNMP::agent module) (@INC contains: /etc/perl /usr/local/lib/i386-linux-gnu/perl/5.26.1 /usr/local/share/perl/5.26.1 /usr/lib/i386-linux-gnu/perl5/5.26 /usr/share/perl5 /usr/lib/i386-linux-gnu/perl/5.26 /usr/share/perl/5.26 /usr/local/lib/site_perl /usr/lib/i386-linux-gnu/perl-base) at spf.pl line 26.
BEGIN failed--compilation aborted at spf.pl line 26.

Any help to this?

[netniV]

Do you have the NetSNMP devel libraries install? I suspect that's what you'll need for Perl to link into it.