summaryrefslogtreecommitdiffstats
path: root/collectors/tc.plugin/tc-qos-helper.sh.in
blob: 01353be456b5cd0d7a0ce07571e85e3345bf6be9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
#!/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
			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 ${exit_after} ] && exit 0
done