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if1sec_: implement autostart, be more like if_

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* look for already running acquire process, or start one
 * use CDEF to return bits/second (like if_)
 * increase lifetime to 450 days (like if_)
 * changed category to plain "network" (like if_)
 * report max interface speed (like if_)
 * small performance improvement: don't fork two cat(1) and one date(1) every second
   (this roughly halves the CPU time used on my system)
This commit is contained in:
Kjetil Torgrim Homme 2016-07-18 17:30:39 +02:00
parent d42751c908
commit 5ff3522ecc
1 changed files with 69 additions and 31 deletions
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100
plugins/network/if1sec_
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@ -1,15 +1,11 @@
#! /bin/sh
# Currently the plugin does *not* autostart
#
# It has to be launched via rc.d :
# munin-run if1sec_eth0 acquire
pluginfull="$0" # full name of plugin
plugin="${0##*/}" # name of plugin
pluginfull="$0" # full name of plugin
plugin="${0##*/}" # name of plugin
pidfile="$MUNIN_PLUGSTATE/munin.$plugin.pid"
cache="$MUNIN_PLUGSTATE/munin.$plugin.value"
IFACE="${0##*/if1sec_}" # interface
IFACE="${0##*/if1sec_}" # interface
if [ ! -r "/sys/class/net/$IFACE/statistics/tx_bytes" ]
then
@ -19,44 +15,86 @@ fi
if [ "$1" = "acquire" ]
then
(
while sleep 1
do
echo $(
date +%s
cat /sys/class/net/$IFACE/statistics/tx_bytes
cat /sys/class/net/$IFACE/statistics/rx_bytes
)
done | awk "{
print \"${IFACE}_tx.value \" \$1 \":\" \$2;
print \"${IFACE}_rx.value \" \$1 \":\" \$3;
system(\"\");
}" >> $cache
) &
echo $! > $pidfile
exit 0
(
exec <&- >&- 2>&-
while sleep 1
do
read tx < /sys/class/net/$IFACE/statistics/tx_bytes
read rx < /sys/class/net/$IFACE/statistics/rx_bytes
echo "$tx $rx"
done | awk "{
now = systime()
print \"${IFACE}_tx.value \" now \":\" \$1
print \"${IFACE}_rx.value \" now \":\" \$2
system(\"\")
}" >> $cache
) &
echo $! > $pidfile
exit 0
fi
if [ "$1" = "config" ]
then
cat <<EOF
cat <<EOF
graph_title Interface 1sec stats for ${IFACE}
graph_category 1sec::network
graph_data_size custom 1d, 10s for 1w, 1m for 1t, 5m for 1y
graph_vlabel Bytes
graph_category network
graph_data_size custom 1d, 10s for 1w, 1m for 1t, 5m for 450d
graph_vlabel bits/sec
update_rate 1
${IFACE}_tx.label ${IFACE} TX bytes
${IFACE}_tx.label ${IFACE} TX bits
${IFACE}_tx.cdef ${IFACE}_tx,8,*
${IFACE}_tx.type DERIVE
${IFACE}_tx.min 0
${IFACE}_rx.label ${IFACE} RX bytes
${IFACE}_rx.label ${IFACE} RX bits
${IFACE}_rx.cdef ${IFACE}_rx,8,*
${IFACE}_rx.type DERIVE
${IFACE}_rx.min 0
EOF
exit 0
# If max speed is easily available, report it. More complex
# code could be copied from "if_".
if [ -r /sys/class/net/$IFACE/speed ]
then
SPEED=$(cat /sys/class/net/$IFACE/speed)
echo "${IFACE}_rx.max" $((SPEED / 8 * 1000000))
echo "${IFACE}_tx.max" $((SPEED / 8 * 1000000))
echo "${IFACE}_rx.info Received traffic on the $IFACE interface. Maximum speed is ${SPEED} Mbps."
echo "${IFACE}_tx.info Transmitted traffic on the $IFACE interface. Maximum speed ${SPEED} Mbps."
fi
exit 0
fi
# values
# Autorun logic
running=true
if [ ! -e ${cache} ]
then
# no cache file
running=false
elif [ ! -s ${cache} ]
then
# empty cache file
if [ -s ${pidfile} ]
then
# kill -0 will return success if this user is allowed to send
# a signal to the process. This means the PID exists and
# belongs to the plugin user, which should have few false
# positives.
if ! kill -0 $(cat ${pidfile})
then
running=false
fi
else
running=false
fi
fi
if ! $running
then
$0 acquire &
# wait a little so we have some data to report
sleep 3
fi
# Finally: Print collected values, truncate to mark spot.
cat ${cache}
> ${cache}