using awk and $ in agentd.conf

[riegersteve]

here are the relevant lines from zabbix_agentd.conf



UserParameter=descriptors.available,awk '{print $3-$1+$2}' /proc/sys/fs/file-nr
UserParameter=descriptors.error,awk '($1-$2)>(.9*$3) {exit 1}' /proc/sys/fs/file-nr

[root@stg2 log]# zabbix_agentd -t descriptors.available
awk: cmd. line:1: {print -+}
awk: cmd. line:1: ^ syntax error
descriptors.available [m|ZBX_NOTSUPPORTED]
[root@stg2 log]# zabbix_agentd -t descriptors.error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
descriptors.error [m|ZBX_NOTSUPPORTED]

[raminix]

here are the relevant lines from zabbix_agentd.conf



UserParameter=descriptors.available,awk '{print $3-$1+$2}' /proc/sys/fs/file-nr
UserParameter=descriptors.error,awk '($1-$2)>(.9*$3) {exit 1}' /proc/sys/fs/file-nr

[root@stg2 log]# zabbix_agentd -t descriptors.available
awk: cmd. line:1: {print -+}
awk: cmd. line:1: ^ syntax error
descriptors.available [m|ZBX_NOTSUPPORTED]
[root@stg2 log]# zabbix_agentd -t descriptors.error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
awk: cmd. line:1: (-)>(.9*) {exit 1}
awk: cmd. line:1: ^ syntax error
descriptors.error [m|ZBX_NOTSUPPORTED]

I was a bit intrigued by this one and why it won't work. I was able to replicate the error and could not figure out a way to get it to work directly from the conf file. Both enclosing the command in back ticks and reversing the order by catting the file to awk failed. However, you can get around this by putting together a short shell script such as:

#!/bin/bash

###################################################
## descriptors.sh
##
## Called by zabbix_agentd, takes an aergument of
## either "avail" or "error" and returns a value
###################################################

ACTION=$1

if [ "$ACTION" = "avail" ]
then

        awk '{print $3-$1+$2}' /proc/sys/fs/file-nr

elif [ "$ACTION" = "error" ]
then

        awk '($1-$2)>(.9*$3) {exit 1}' /proc/sys/fs/file-nr

fi

and then call it as such:

UserParameter=descriptors.available,/path/to/descriptors.sh avail
UserParameter=descriptors.error,/path/to/descriptors.sh error

And that should do the trick.

[Alexei]

Change

UserParameter=descriptors.available,awk '{print $3-$1+$2}' /proc/sys/fs/file-nr
UserParameter=descriptors.error,awk '($1-$2)>(.9*$3) {exit 1}' /proc/sys/fs/file-nr

to

UserParameter=descriptors.available,awk '{print $ 3-$ 1+$ 2}' /proc/sys/fs/file-nr
UserParameter=descriptors.error,awk '($ 1-$ 2)>(.9*$ 3) {exit 1}' /proc/sys/fs/file-nr

ZABBIX 1.1.2 won't have this problem.