160 lines
5.5 KiB
Bash
Executable File
160 lines
5.5 KiB
Bash
Executable File
#!/bin/bash
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: << =cut
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=head1 NAME
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netatalk - Plugin to monitor number of files held open by the Netatalk/AFP clients
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=head1 CONFIGURATION
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This plugin uses the following configuration variables
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[netatalk]
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user root - Plugin must run under root for lsof
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env.afpd - Path to "afpd" executable (defaults to what afpd -v says, usually "/usr/sbin/afpd")
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env.afpdconf - Path to "afpd.conf" file (defaults to what afpd -v says, usually "/etc/netatalk/afpd.conf")
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=head1 VERSION
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0.1 (2012-05-23)
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=head1 AUTHOR
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DUVERGIER Claude (http://claude.duvergier.fr)
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=head1 LICENSE
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GPLv2
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=head1 BUGS
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Known bugs:
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* A bug can occur if a shared path is located inside another shared path (eg. "/mnt/afpShares/foo" and "/mnt/afpShares/foo/subFoo/bar").
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Depending of the order the shares are found, the script might say the less-deeper one is opened whereas he is processing the other one.
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=head1 TODO
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Features to-do list:
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* Support multiple servers
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=head1 MAGIC MARKERS
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#%# family=contrib
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#%# capabilities=autoconf
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=cut
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# Find "afpd" location:
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afpdPath=${afpd:-`which afpd`}
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afpdPath=${afpdPath:-/usr/sbin/afpd}
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#####
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## Munin configuration ("autoconf" and "config")
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#####
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if [ "$1" = "autoconf" ]; then
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if [ -x $afpdPath ]; then
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echo yes
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exit 0
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else
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echo no '(afpd not found)'
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exit 0
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fi
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fi
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if [ "$1" = "config" ]; then
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echo 'graph_title Netatalk status'
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echo 'graph_args --logarithmic --lower-limit 0.1'
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echo 'graph_vlabel Number'
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echo 'graph_category fs'
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echo 'proc.label Running processes'
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echo 'proc.info Number of running afpd processes'
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echo 'proc.min 0'
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echo 'user.label Connected users'
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echo 'user.info Number of users connected to netatalk service'
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echo 'user.min 0'
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echo 'lock.label Locked files'
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echo 'lock.info Number of files locked by afpd'
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echo 'lock.min 0'
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echo 'share.label Open shares'
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echo 'share.info Number of open netatalk shares'
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echo 'share.min 0'
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exit 0
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fi
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##########
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#####
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## Script environment
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#####
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# Find "afpd.conf" location:
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afpdConfPath=${afpdconf:-`$afpdPath -v 2>/dev/null | grep "afpd.conf" | awk '{print $2}'`}
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baseLsofCommand="lsof -a -c $(basename $afpdPath) -d ^DEL,^err,^jld,^ltx,^Mxx,^m86,^mem,^mmap,^pd,^rtd,^tr,^txt,^v86"
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#TODO: Support multiple servers
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defaultServer_defaultVolConfigLine=$(cat $afpdConfPath | grep "^[^#]" | grep "\-defaultvol")
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if [ -z "$defaultServer_defaultVolConfigLine" ]; then
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defaultServer_volumesFile=`$afpdPath -v 2>/dev/null | grep "AppleVolumes.default" | awk '{print $2}'` # Default location "AppleVolumes.default"
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else
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defaultVol_pathIsQuoted="-defaultvol ('|\")"
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defaultVol_quotedPattern="-defaultvol ('|\")([^\1]*)\1"
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# Following regex is from http://stackoverflow.com/questions/537772/what-is-the-most-correct-regular-expression-for-a-unix-file-path
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defaultVol_nonQuotedPattern='-defaultvo(l) (([^\0 !$`&*()+]|\\( |!|$|`|&|\*|\(|\)|\+))+)'
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defaultVol_pathPattern=$defaultVol_nonQuotedPattern
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[[ $defaultServer_defaultVolConfigLine =~ $defaultVol_pathIsQuoted ]] && defaultVol_pathPattern=$defaultVol_quotedPattern
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[[ $defaultServer_defaultVolConfigLine =~ $defaultVol_pathPattern ]] && defaultServer_volumesFile=${BASH_REMATCH[2]}
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fi
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##########
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#####
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## Actual monitoring
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#####
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# Running processes (proc):
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echo "proc.value" $(ps ax --no-headers -o command | grep "^$afpdPath" | wc -l)
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# Connected users (user):
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# We will ignore root (having UID=0 it's line will be first) (assumption done: there will have only one line corresponding to root in `ps` output)
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connectedUsers=$(ps anx --no-headers -o uid,command | sed 's/^ *//g' | grep "^[0-9]* $afpdPath" | sort -n | tail -n +2 | awk '{print $1}')
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echo "user.value" `echo $connectedUsers | wc -w`
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# Locked files (lock):
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echo "lock.value" $($baseLsofCommand -F l | grep "^l[rRwWu]" | wc -l)
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# Open shares (share):
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openShares=0
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#TOFIX: A bug can occur if a shared path is located inside another shared path (eg. "/mnt/afpShares/foo" and "/mnt/afpShares/foo/subFoo/bar"):
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# Depending of the order the shares are found, the script might say the less-deeper one is opened whereas he is processing the other one
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# Solution: sort shares per descending depth
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# Following regex is from http://stackoverflow.com/questions/10134129/generic-shell-bash-method-to-parse-string-for-possibly-quoted-fields
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for shareName in `cat $defaultServer_volumesFile | grep "^[^#:]" | grep -oP "^(['\"]).*?\1|^(\\\\ |[^ '\"])*"`; do
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if [[ "$shareName" =~ "~" ]]; then
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for currentUid in $connectedUsers; do # For each connected users
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currentUserHomeDir=`getent passwd $currentUid | cut -d ':' -f6` # Fetch it's the home directory
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currentUserHomeDir=`readlink -f "$currentUserHomeDir"` # We want the realpath (resolves symbolic links and normalize the path)
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#FIX: We use pipe `lsof` outputs to `echo -e` with `xargs` because lsof "displays only printable ASCII characters" (cf. http://ftp.cerias.purdue.edu/pub/tools/unix/sysutils/lsof/00FAQ #14.5)
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# Then if a share with non-ASCII characters in it's path were to be opened, lsof would return them on \xNN form and grep wouldn't match: `echo -e /the/path` fixes this
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[ `$baseLsofCommand -F n | xargs -0 echo -e | grep "^n$currentUserHomeDir" | wc -l` -gt 0 ] && let openShares++ # If found in lsof output: increment the openShares counter
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done
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else
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shareName=`readlink -f "$shareName"` # We want the realpath (resolves symbolic links and normalize the path)
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[ `$baseLsofCommand -F n | xargs -0 echo -e | grep "^n$shareName" | wc -l` -gt 0 ] && let openShares++ # If found in lsof output: increment the openShares counter
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fi
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done
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echo "share.value" $openShares
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##########
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