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#!/usr/bin/env bash
# netdata
# real-time performance and health monitoring, done right!
# (C) 2017 Costa Tsaousis <costa@tsaousis.gr>
# SPDX-License-Identifier: GPL-3.0-or-later
#
# This script is a helper to allow netdata collect tc data.
# tc output parsing has been implemented in C, inside netdata
# This script allows setting names to dimensions.
export PATH="${PATH}:/sbin:/usr/sbin:/usr/local/sbin"
export LC_ALL=C
# -----------------------------------------------------------------------------
# logging functions
PROGRAM_NAME="$(basename "$0")"
PROGRAM_NAME="${PROGRAM_NAME/.plugin/}"
logdate() {
date "+%Y-%m-%d %H:%M:%S"
}
log() {
local status="${1}"
shift
echo >&2 "$(logdate): ${PROGRAM_NAME}: ${status}: ${*}"
}
warning() {
log WARNING "${@}"
}
error() {
log ERROR "${@}"
}
info() {
log INFO "${@}"
}
fatal() {
log FATAL "${@}"
exit 1
}
debug=0
debug() {
[ $debug -eq 1 ] && log DEBUG "${@}"
}
# -----------------------------------------------------------------------------
# find /var/run/fireqos
# the default
fireqos_run_dir="/var/run/fireqos"
function realdir() {
local r
local t
r="$1"
t="$(readlink "$r")"
while [ "$t" ]; do
r=$(cd "$(dirname "$r")" && cd "$(dirname "$t")" && pwd -P)/$(basename "$t")
t=$(readlink "$r")
done
dirname "$r"
}
if [ ! -d "${fireqos_run_dir}" ]; then
# the fireqos executable - we will use it to find its config
fireqos="$(command -v fireqos 2>/dev/null)"
if [ -n "${fireqos}" ]; then
fireqos_exec_dir="$(realdir "${fireqos}")"
if [ -n "${fireqos_exec_dir}" ] && [ "${fireqos_exec_dir}" != "." ] && [ -f "${fireqos_exec_dir}/install.config" ]; then
LOCALSTATEDIR=
#shellcheck source=/dev/null
source "${fireqos_exec_dir}/install.config"
if [ -d "${LOCALSTATEDIR}/run/fireqos" ]; then
fireqos_run_dir="${LOCALSTATEDIR}/run/fireqos"
else
warning "FireQoS is installed as '${fireqos}', its installation config at '${fireqos_exec_dir}/install.config' specifies local state data at '${LOCALSTATEDIR}/run/fireqos', but this directory is not found or is not readable (check the permissions of its parents)."
fi
else
warning "Although FireQoS is installed on this system as '${fireqos}', I cannot find/read its installation configuration at '${fireqos_exec_dir}/install.config'."
fi
else
warning "FireQoS is not installed on this system. Use FireQoS to apply traffic QoS and expose the class names to netdata. Check https://github.com/netdata/netdata/tree/master/collectors/tc.plugin#tcplugin"
fi
fi
# -----------------------------------------------------------------------------
[ -z "${NETDATA_PLUGINS_DIR}" ] && NETDATA_PLUGINS_DIR="$(dirname "${0}")"
[ -z "${NETDATA_USER_CONFIG_DIR}" ] && NETDATA_USER_CONFIG_DIR="@configdir_POST@"
[ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="@libconfigdir_POST@"
plugins_dir="${NETDATA_PLUGINS_DIR}"
tc="$(command -v tc 2>/dev/null)"
# -----------------------------------------------------------------------------
# user configuration
# time in seconds to refresh QoS class/qdisc names
qos_get_class_names_every=120
# time in seconds to exit - netdata will restart the script
qos_exit_every=3600
# what to use? classes or qdiscs?
tc_show="qdisc" # can also be "class"
# -----------------------------------------------------------------------------
# check if we have a valid number for interval
t=${1}
update_every=$((t))
[ $((update_every)) -lt 1 ] && update_every=${NETDATA_UPDATE_EVERY}
[ $((update_every)) -lt 1 ] && update_every=1
# -----------------------------------------------------------------------------
# allow the user to override our defaults
for CONFIG in "${NETDATA_STOCK_CONFIG_DIR}/tc-qos-helper.conf" "${NETDATA_USER_CONFIG_DIR}/tc-qos-helper.conf"; do
if [ -f "${CONFIG}" ]; then
info "Loading config file '${CONFIG}'..."
#shellcheck source=/dev/null
source "${CONFIG}" || error "Failed to load config file '${CONFIG}'."
else
warning "Cannot find file '${CONFIG}'."
fi
done
case "${tc_show}" in
qdisc | class) ;;
*)
error "tc_show variable can be either 'qdisc' or 'class' but is set to '${tc_show}'. Assuming it is 'qdisc'."
tc_show="qdisc"
;;
esac
# -----------------------------------------------------------------------------
# default sleep function
LOOPSLEEPMS_LASTWORK=0
loopsleepms() {
sleep "$1"
}
# if found and included, this file overwrites loopsleepms()
# with a high resolution timer function for precise looping.
#shellcheck source=/dev/null
. "${plugins_dir}/loopsleepms.sh.inc"
# -----------------------------------------------------------------------------
# final checks we can run
if [ -z "${tc}" ] || [ ! -x "${tc}" ]; then
fatal "cannot find command 'tc' in this system."
fi
tc_devices=
fix_names=
# -----------------------------------------------------------------------------
setclassname() {
if [ "${tc_show}" = "qdisc" ]; then
echo "SETCLASSNAME $4 $2"
else
echo "SETCLASSNAME $3 $2"
fi
}
show_tc_cls() {
[ "${tc_show}" = "qdisc" ] && return 1
local x="${1}"
if [ -f /etc/iproute2/tc_cls ]; then
local classid name rest
while read -r classid name rest; do
if [ -z "${classid}" ] ||
[ -z "${name}" ] ||
[ "${classid}" = "#" ] ||
[ "${name}" = "#" ] ||
[ "${classid:0:1}" = "#" ] ||
[ "${name:0:1}" = "#" ]; then
continue
fi
setclassname "" "${name}" "${classid}"
done </etc/iproute2/tc_cls
return 0
fi
return 1
}
show_fireqos_names() {
local x="${1}" name n interface_dev interface_classes_monitor
if [ -f "${fireqos_run_dir}/ifaces/${x}" ]; then
name="$(<"${fireqos_run_dir}/ifaces/${x}")"
echo "SETDEVICENAME ${name}"
#shellcheck source=/dev/null
source "${fireqos_run_dir}/${name}.conf"
for n in ${interface_classes_monitor}; do
# shellcheck disable=SC2086
setclassname ${n//|/ }
done
[ -n "${interface_dev}" ] && echo "SETDEVICEGROUP ${interface_dev}"
return 0
fi
return 1
}
show_tc() {
local x="${1}"
echo "BEGIN ${x}"
# netdata can parse the output of tc
${tc} -s ${tc_show} show dev "${x}"
# check FireQOS names for classes
if [ -n "${fix_names}" ]; then
show_fireqos_names "${x}" || show_tc_cls "${x}"
fi
echo "END ${x}"
}
find_tc_devices() {
local count=0 devs dev rest l
# find all the devices in the system
# without forking
while IFS=":| " read -r dev rest; do
count=$((count + 1))
[ ${count} -le 2 ] && continue
devs="${devs} ${dev}"
done </proc/net/dev
# from all the devices find the ones
# that have QoS defined
# unfortunately, one fork per device cannot be avoided
tc_devices=
for dev in ${devs}; do
l="$(${tc} class show dev "${dev}" 2>/dev/null)"
[ -n "${l}" ] && tc_devices="${tc_devices} ${dev}"
done
}
# update devices and class names
# once every 2 minutes
names_every=$((qos_get_class_names_every / update_every))
# exit this script every hour
# it will be restarted automatically
exit_after=$((qos_exit_every / update_every))
c=0
gc=0
while true; do
fix_names=
c=$((c + 1))
gc=$((gc + 1))
if [ ${c} -le 1 ] || [ ${c} -ge ${names_every} ]; then
c=1
fix_names="YES"
find_tc_devices
fi
for d in ${tc_devices}; do
show_tc "${d}"
done
echo "WORKTIME ${LOOPSLEEPMS_LASTWORK}"
loopsleepms ${update_every}
[ ${gc} -gt
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