132 lines
3.6 KiB
Bash
Executable File
132 lines
3.6 KiB
Bash
Executable File
#!/bin/sh
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: << =cut
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=head1 NAME
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lxc_net - Munin plugin to graph traffic of active LXC containers.
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=head1 APPLICABLE SYSTEMS
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LXC container with "lxc.network.type=veth" and "lxc.network.veth.pair" settings.
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=head1 CONFIGURATION
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env.lxcpath - Set the path where LXC containers are stored, default: /var/lib/lxc
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env.exclude - Removing containers from graphs, default: empty
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[lxc_net]
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env.lxcpath /var/lib/lxc
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env.exclude container1 container2
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=head1 INTERPRETATION
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This plugin reads a "lxc.network.veth.pair" setting from "config" file of each container,
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because lxc-start command creates a random named veth device without the setting.
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If your xen config (/var/lib/lxc/GUEST_NAME/config does not contain this parameter,
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then you have to fill it, because if every guest restart generate new device name, then the graph will be useless
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( example config : lxc.network.veth.pair = vethsamba )
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=head1 AUTHOR
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mitty mitty@mitty.jp
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=head1 LICENSE
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2-clause BSD License
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=head1 MAGIC MARKERS
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#%# familiy=auto
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#%# capabilities=autoconf
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=cut
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. $MUNIN_LIBDIR/plugins/plugin.sh
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lxcpath=${lxcpath:-/var/lib/lxc}
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if [ "$1" = "autoconf" ]; then
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if [ ! -r /proc/net/dev ]; then
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echo "no (/proc/net/dev cannot be read)"
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exit 0
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fi
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if [ ! -e "$lxcpath" ]; then
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echo "no ($lxcdir is not present)"
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exit 0
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fi
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echo yes
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fi
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actives=""
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for guest in `ls $lxcpath`; do
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if [ `echo $exclude | grep -c "\b$guest\b"` -eq 1 ]; then
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continue;
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fi
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if [ -f "$lxcpath/$guest/config" ]; then
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devices=`grep '^lxc\.network\.veth\.pair[ \t]*=[ \t]*' $lxcpath/$guest/config | \
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awk '{ split($0, a, /=/); gsub(/[ \t]/, "", a[2]); print a[2]; }'`
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if [ -n "$devices" ]; then
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for device in $devices; do
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device_re=`echo $device | sed -e 's/\./\\\\./g'`
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if [ `grep -c "^ *$device_re:" /proc/net/dev` -eq 1 ]; then
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actives="$actives $guest"
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eval "dev_$(clean_fieldname $guest)=$device"
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fi
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done
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fi
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fi
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done
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if [ "$1" = "config" ]; then
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echo "graph_title Network traffic"
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echo "graph_args --base 1000"
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echo "graph_vlabel bits in (-) / out (+) per ${graph_period}"
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echo "graph_category network"
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echo "graph_info This graph shows the traffic of active LXC containers."
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for guestname in $actives; do
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guest=$(clean_fieldname $guestname)
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device=$(eval 'echo $dev_'$guest)
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bps="U"
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if [ -r /sys/class/net/$device/speed ]; then
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bps=$(cat /sys/class/net/$device/speed)
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bps=$(($bps * 1000 * 1000))
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fi
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echo "${guest}_down.label $guestname"
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echo "${guest}_down.type DERIVE"
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echo "${guest}_down.graph no"
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echo "${guest}_down.cdef ${guest}_down,8,*"
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echo "${guest}_down.min 0"
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echo "${guest}_down.max $bps"
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echo "${guest}_up.label $guestname"
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echo "${guest}_up.type DERIVE"
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echo "${guest}_up.negative ${guest}_down"
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echo "${guest}_up.cdef ${guest}_up,8,*"
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echo "${guest}_up.min 0"
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echo "${guest}_up.max $bps"
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done
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exit 0
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fi
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for guest in $actives; do
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guest=$(clean_fieldname $guest)
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device=$(eval 'echo $dev_'$guest)
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device_re=`echo $device | sed -e 's/\./\\\\./g'`
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line=`grep "^ *$device_re:" /proc/net/dev`
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echo -n "${guest}_down.value "
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echo $line | awk '{
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split($0, a, /: */);
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print $2;
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}'
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echo -n "${guest}_up.value "
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echo $line | awk '{
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split($0, a, /: */);
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print $10;
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}'
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done
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