Good day.
Some nitpicking ;)
ifconfig is deprecated was replaced by ip.
Depending on your configuration a system under very heavy
memory pressure may timeout executing external programms,
so reading files from the in memory sysfs may be a better choice.
If you are only Linux (no HP-UX, AIX, Solaris, etc.) all
information can also be found in files in the sysfs mount (usually
/sys) in /sys/class/net/<device>
Link state: /sys/class/net/operstate
Negotiated/configured link speed: /sys/class/net/speed
Negotiated/configured duplex mode: /sys/class/net/duplex
MTU: /sys/class/net/mtu
Error/drop and other counters are in the corresponding files
in /sys/class/net/<device>/statistics/
Note: those are 64 bit _counter_ values, if you want the rate
you have to keep the previous value, calculate the difference
and check for counter overflows.
If you have non-Ethernet network interfaces the kernel also provides
similar information in /sys/class, e.g. for Infinband devices
in /sys/class/infiniband/<hca>/ports/<port>
or FibreChannel devices in /sys/class/fc_host/ /sys/class/fc_vports/ and
/sys/class/fc_remote_ports/
Obviously all commands must be executed on the client (assuming
Icinga2).
My 2 euro cents.
So long,
Andreas.
On Wed Jun 05, 2019 at 15:52:46PM +0000, Ivo Kidze wrote:
> Hi Simon,
>
> A small plugin script on the client could reduce hair loss. I have scribbled
> a small solution for up/down. You can adapt it for link speed, rx, tx, crc
> errors etc.
>
> Usage: sh check_interface_state.sh eth0
>
> #!/bin/bash
>
> state=$(/sbin/ifconfig -a | grep $1 | awk 'BEGIN{FS="<"; RS=","}{print $2;
> exit}')
>
> #echo "$state"
> if [ ! -z "$state" ]; then
> if (($state == "UP")); then
> echo "OK - interface $1 is UP"
> exit 0
> else
> echo "CRITICAL - interface $1 is DOWN"
> exit 2
> fi
> else
> echo "CRITICAL - interface $1 is DOWN"
> exit 2
> fi
>
> You make improve the script to serve your needs.
>
> Kind Regards,
> Ivo Kidze
>
> From: icinga-users [mailto:[email protected]] On Behalf
> Of Mueller, Simon
> Sent: Wednesday, June 5, 2019 6:00 AM
> To: [email protected]
> Subject: [icinga-users] Check network interfaces without SNMP
>
> Hello Community,
>
> we are searching for a possibility to check network interfaces (up/down, link
> speed, rx, tx, crc errors, etc.) without going through the hassle to
> configure snmpd on each client that we are monitoring. The plugin that we are
> searching for most likely will use information from
> ethtool/mii-tool/ifconfig/ip commands which are normally existent on every
> client by default or could easily be added to kickstart/configmgmt.
>
> Until now we couldn't find anything proper on Icinga Exchange or on the net,
> maybe you guys have an idea?
>
>
> Best regards,
>
> Simon Müller
> Consultant
> Bechtle GmbH & Co. KG
> Besselstraße 20-22, DE-68219 Mannheim
>
> Phone: +49 621 87503 140
>
> E-Mail: [email protected]<mailto:[email protected]>
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