diff options
Diffstat (limited to '')
-rw-r--r-- | collectors/tc.plugin/Makefile.am | 20 | ||||
-rw-r--r-- | collectors/tc.plugin/Makefile.in | 562 | ||||
-rw-r--r-- | collectors/tc.plugin/README.md | 183 | ||||
-rw-r--r-- | collectors/tc.plugin/plugin_tc.c (renamed from src/plugin_tc.c) | 58 | ||||
-rw-r--r-- | collectors/tc.plugin/plugin_tc.h | 31 | ||||
-rw-r--r--[-rwxr-xr-x] | collectors/tc.plugin/tc-qos-helper.sh (renamed from plugins.d/tc-qos-helper.sh) | 110 | ||||
-rwxr-xr-x | collectors/tc.plugin/tc-qos-helper.sh.in | 315 |
7 files changed, 1203 insertions, 76 deletions
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's#[@]cachedir_POST@#$(cachedir)#g' \ + $< > $@.tmp; then \ + mv "$@.tmp" "$@"; \ + else \ + rm -f "$@.tmp"; \ + false; \ + fi + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/collectors/tc.plugin/README.md b/collectors/tc.plugin/README.md new file mode 100644 index 000000000..6670c491f --- /dev/null +++ b/collectors/tc.plugin/README.md @@ -0,0 +1,183 @@ +## tc.plugin + +Live demo - **[see it in action here](https://registry.my-netdata.io/#menu_tc)** ! + +![qos](https://cloud.githubusercontent.com/assets/2662304/14439411/b7f36254-0033-11e6-93f0-c739bb6a1c3a.gif) + +Netdata monitors `tc` QoS classes for all interfaces. + +If you also use [FireQOS](http://firehol.org/tutorial/fireqos-new-user/) it will collect +interface and class names. + +There is a [shell helper](tc-qos-helper.sh.in) for this (all parsing is done by the plugin +in `C` code - this shell script is just a configuration for the command to run to get `tc` output). + +The source of the tc plugin is [here](plugin_tc.c). It is somewhat complex, because a state +machine was needed to keep track of all the `tc` classes, including the pseudo classes tc +dynamically creates. + +## Motivation + +One category of metrics missing in Linux monitoring, is bandwidth consumption for each open +socket (inbound and outbound traffic). So, you cannot tell how much bandwidth your web server, +your database server, your backup, your ssh sessions, etc are using. + +To solve this problem, the most *adventurous* Linux monitoring tools install kernel modules to +capture all traffic, analyze it and provide reports per application. A lot of work, CPU intensive +and with a great degree of risk (due to the kernel modules involved which might affect the +stability of the whole system). Not to mention that such solutions are probably better suited +for a core linux router in your network. + +Others use NFACCT, the netfilter accounting module which is already part of the Linux firewall. +However, this would require configuring a firewall on every system you want to measure bandwidth. + +QoS monitoring attempts to solve this in a much cleaner way. + +## Introduction to QoS + +One of the features the Linux kernel has, but it is rarely used, is its ability to +**apply QoS on traffic**. Even most interesting is that it can apply QoS to **both inbound and +outbound traffic**. + +QoS is about 2 features: + +1. **Classify traffic** + + Classification is the process of organizing traffic in groups, called **classes**. + Classification can evaluate every aspect of network packets, like source and destination ports, + source and destination IPs, netfilter marks, etc. + + When you classify traffic, you just assign a label to it. For example **I call `web server` + traffic, the traffic from my server's tcp/80, tcp/443 and to my server's tcp/80, tcp/443, + while I call `web surfing` all other tcp/80 and tcp/443 traffic**. You can use any combinations + you like. There is no limit. + +2. **Apply traffic shaping rules to these classes** + + Traffic shaping is used to control how network interface bandwidth should be shared among the + classes. Of course we are not interested for this feature to just monitor the traffic. + Classification will be enough for monitoring everything. + +The key reasons of applying QoS on all servers (even cloud ones) are: + + - **ensure administrative tasks (like ssh, dns, etc) will always have a small but guaranteed + bandwidth.** QoS can guarantee that services like ssh, dns, ntp, etc will always have a small + supply of bandwidth. So, no matter what happens, you will be able to ssh to your server and + DNS will always work. + + - **ensure other administrative tasks will not monopolize all the available bandwidth.** + Services like backups, file copies, database dumps, etc can easily monopolize all the + available bandwidth. It is common for example a nightly backup, or a huge file transfer + to negatively influence the end-user experience. QoS can fix that. + + - **ensure each end-user connection will get a fair cut of the available bandwidth.** + Several QoS queuing disciplines in Linux do this automatically, without any configuration from you. + The result is that new sockets are favored over older ones, so that users will get a snappier + experience, while others are transferring large amounts of traffic. + + - **protect the servers from DDoS attacks.** + When your system is under a DDoS attack, it will get a lot more bandwidth compared to the one it + can handle and probably your applications will crash. Setting a limit on the inbound traffic using + QoS, will protect your servers (throttle the requests) and depending on the size of the attack may + allow your legitimate users to access the server, while the attack is taking place. + + +Once **traffic classification** is applied, netdata can visualize the bandwidth consumption per +class in real-time (no configuration is needed for netdata - it will figure it out). + +QoS, is extremely light. You will configure it once, and this is it. It will not bother you again +and it will not use any noticeable CPU resources, especially on application and database servers. + +## QoS in Linux? Have you lost your mind? + +Yes I know... but no, I have not! + +Of course, `tc` is probably **the most undocumented, complicated and unfriendly** command in Linux. + +For example, for matching a simple port range in `tc`, e.g. all the high ports, from 1025 to 65535 +inclusive, you have to match these: + +``` +1025/0xffff 1026/0xfffe 1028/0xfffc 1032/0xfff8 1040/0xfff0 +1056/0xffe0 1088/0xffc0 1152/0xff80 1280/0xff00 1536/0xfe00 +2048/0xf800 4096/0xf000 8192/0xe000 16384/0xc000 32768/0x8000 +``` + +I know what you are thinking right now! **And I agree!** + +This is why I wrote **[FireQOS](https://firehol.org/tutorial/fireqos-new-user/)**, a tool to +simplify QoS management in Linux. + +The **[FireHOL](https://firehol.org/)** package already distributes **[FireQOS](https://firehol.org/tutorial/fireqos-new-user/)**. +Check the **[FireQOS tutorial](https://firehol.org/tutorial/fireqos-new-user/)** +to learn how to write your own QoS configuration. + +With **[FireQOS](https://firehol.org/tutorial/fireqos-new-user/)**, it is **really simple for everyone +to use QoS in Linux**. Just install the package `firehol`. It should already be available for your +distribution. If not, check the **[FireHOL Installation Guide](https://firehol.org/installing/)**. +After that, you will have the `fireqos` command. + +This is the file `/etc/firehol/fireqos.conf` we use at the netdata demo site: + +```sh + # configure the netdata ports + server_netdata_ports="tcp/19999" + + interface eth0 world bidirectional ethernet balanced rate 50Mbit + class arp + match arp + + class icmp + match icmp + + class dns commit 1Mbit + server dns + client dns + + class ntp + server ntp + client ntp + + class ssh commit 2Mbit + server ssh + client ssh + + class rsync commit 2Mbit max 10Mbit + server rsync + client rsync + + class web_server commit 40Mbit + server http + server netdata + + class client + client surfing + + class nms commit 1Mbit + match input src 10.2.3.5 +``` + +Nothing more is needed. You just run `fireqos start` to apply this configuration, restart netdata +and you have real-time visualization of the bandwidth consumption of your applications. FireQOS is +not a daemon. It will just convert the configuration to `tc` commands. It will run them and it will +exit. + +**IMPORTANT**: If you copy this configuration to apply it to your system, please adapt the +speeds - experiment in non-production environments to learn the tool, before applying it on +your servers. + +And this is what you are going to get: + +![image](https://cloud.githubusercontent.com/assets/2662304/14436322/c91d90a4-0024-11e6-9fb1-57cdef1580df.png) + +--- + +## More examples: + +This is QoS from a linux router. Check these features: + +1. It is real-time (per second updates) +2. QoS really works in Linux - check that the `background` traffic is squeezed when `surfing` needs it. + +![test2](https://cloud.githubusercontent.com/assets/2662304/14093004/68966020-f553-11e5-98fe-ffee2086fafd.gif) + diff --git a/src/plugin_tc.c b/collectors/tc.plugin/plugin_tc.c index 4b6d84e11..083cc2986 100644 --- a/src/plugin_tc.c +++ b/collectors/tc.plugin/plugin_tc.c @@ -1,6 +1,9 @@ -#include "common.h" +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "plugin_tc.h" #define RRD_TYPE_TC "tc" +#define PLUGIN_TC_NAME "tc.plugin" // ---------------------------------------------------------------------------- // /sbin/tc processor @@ -391,9 +394,9 @@ static inline void tc_device_commit(struct tc_device *d) { , RRD_TYPE_TC ".qos" , "Class Usage" , "kilobits/s" - , "tc" + , PLUGIN_TC_NAME , NULL - , 7000 + , NETDATA_CHART_PRIO_TC_QOS , localhost->rrd_update_every , d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED ); @@ -402,7 +405,7 @@ static inline void tc_device_commit(struct tc_device *d) { rrdset_next(d->st_bytes); if(unlikely(d->name_updated)) rrdset_set_name(d->st_bytes, d->name); - // FIXME + // TODO // update the family } @@ -439,9 +442,9 @@ static inline void tc_device_commit(struct tc_device *d) { , RRD_TYPE_TC ".qos_packets" , "Class Packets" , "packets/s" - , "tc" + , PLUGIN_TC_NAME , NULL - , 7010 + , NETDATA_CHART_PRIO_TC_QOS_PACKETS , localhost->rrd_update_every , d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED ); @@ -455,7 +458,7 @@ static inline void tc_device_commit(struct tc_device *d) { rrdset_set_name(d->st_packets, name); } - // FIXME + // TODO // update the family } @@ -492,9 +495,9 @@ static inline void tc_device_commit(struct tc_device *d) { , RRD_TYPE_TC ".qos_dropped" , "Class Dropped Packets" , "packets/s" - , "tc" + , PLUGIN_TC_NAME , NULL - , 7020 + , NETDATA_CHART_PRIO_TC_QOS_DROPPED , localhost->rrd_update_every , d->enabled_all_classes_qdiscs ? RRDSET_TYPE_LINE : RRDSET_TYPE_STACKED ); @@ -508,7 +511,7 @@ static inline void tc_device_commit(struct tc_device *d) { rrdset_set_name(d->st_dropped, name); } - // FIXME + // TODO // update the family } @@ -545,9 +548,9 @@ static inline void tc_device_commit(struct tc_device *d) { , RRD_TYPE_TC ".qos_tokens" , "Class Tokens" , "tokens" - , "tc" + , PLUGIN_TC_NAME , NULL - , 7030 + , NETDATA_CHART_PRIO_TC_QOS_TOCKENS , localhost->rrd_update_every , RRDSET_TYPE_LINE ); @@ -561,7 +564,7 @@ static inline void tc_device_commit(struct tc_device *d) { rrdset_set_name(d->st_tokens, name); } - // FIXME + // TODO // update the family } @@ -599,9 +602,9 @@ static inline void tc_device_commit(struct tc_device *d) { , RRD_TYPE_TC ".qos_ctokens" , "Class cTokens" , "ctokens" - , "tc" + , PLUGIN_TC_NAME , NULL - , 7040 + , NETDATA_CHART_PRIO_TC_QOS_CTOCKENS , localhost->rrd_update_every , RRDSET_TYPE_LINE ); @@ -616,7 +619,7 @@ static inline void tc_device_commit(struct tc_device *d) { rrdset_set_name(d->st_ctokens, name); } - // FIXME + // TODO // update the family } @@ -857,7 +860,7 @@ void *tc_main(void *ptr) { struct rusage thread; - char buffer[TC_LINE_MAX+1] = ""; + char command[FILENAME_MAX + 1]; char *words[PLUGINSD_MAX_WORDS] = { NULL }; uint32_t BEGIN_HASH = simple_hash("BEGIN"); @@ -876,23 +879,24 @@ void *tc_main(void *ptr) { #endif uint32_t first_hash; - snprintfz(buffer, TC_LINE_MAX, "%s/tc-qos-helper.sh", netdata_configured_plugins_dir); - char *tc_script = config_get("plugin:tc", "script to run to get tc values", buffer); + snprintfz(command, TC_LINE_MAX, "%s/tc-qos-helper.sh", netdata_configured_plugins_dir); + char *tc_script = config_get("plugin:tc", "script to run to get tc values", command); while(!netdata_exit) { FILE *fp; struct tc_device *device = NULL; struct tc_class *class = NULL; - snprintfz(buffer, TC_LINE_MAX, "exec %s %d", tc_script, localhost->rrd_update_every); - debug(D_TC_LOOP, "executing '%s'", buffer); + snprintfz(command, TC_LINE_MAX, "exec %s %d", tc_script, localhost->rrd_update_every); + debug(D_TC_LOOP, "executing '%s'", command); - fp = mypopen(buffer, (pid_t *)&tc_child_pid); + fp = mypopen(command, (pid_t *)&tc_child_pid); if(unlikely(!fp)) { - error("TC: Cannot popen(\"%s\", \"r\").", buffer); + error("TC: Cannot popen(\"%s\", \"r\").", command); goto cleanup; } + char buffer[TC_LINE_MAX+1] = ""; while(fgets(buffer, TC_LINE_MAX, fp) != NULL) { if(unlikely(netdata_exit)) break; @@ -1074,9 +1078,9 @@ void *tc_main(void *ptr) { , NULL , "NetData TC CPU usage" , "milliseconds/s" - , "tc" + , PLUGIN_TC_NAME , NULL - , 135000 + , NETDATA_CHART_PRIO_NETDATA_TC_CPU , localhost->rrd_update_every , RRDSET_TYPE_STACKED ); @@ -1101,9 +1105,9 @@ void *tc_main(void *ptr) { , NULL , "NetData TC script execution" , "milliseconds/run" - , "tc" + , PLUGIN_TC_NAME , NULL - , 135001 + , NETDATA_CHART_PRIO_NETDATA_TC_TIME , localhost->rrd_update_every , RRDSET_TYPE_AREA ); diff --git a/collectors/tc.plugin/plugin_tc.h b/collectors/tc.plugin/plugin_tc.h new file mode 100644 index 000000000..c64658415 --- /dev/null +++ b/collectors/tc.plugin/plugin_tc.h @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_PLUGIN_TC_H +#define NETDATA_PLUGIN_TC_H 1 + +#include "../../daemon/common.h" + +#if (TARGET_OS == OS_LINUX) + +#define NETDATA_PLUGIN_HOOK_LINUX_TC \ + { \ + .name = "PLUGIN[tc]", \ + .config_section = CONFIG_SECTION_PLUGINS, \ + .config_name = "tc", \ + .enabled = 1, \ + .thread = NULL, \ + .init_routine = NULL, \ + .start_routine = tc_main \ + }, + +extern void *tc_main(void *ptr); + +#else // (TARGET_OS == OS_LINUX) + +#define NETDATA_PLUGIN_HOOK_LINUX_TC + +#endif // (TARGET_OS == OS_LINUX) + + +#endif /* NETDATA_PLUGIN_TC_H */ + diff --git a/plugins.d/tc-qos-helper.sh b/collectors/tc.plugin/tc-qos-helper.sh index 9153f22e2..b49d1f509 100755..100644 --- a/plugins.d/tc-qos-helper.sh +++ b/collectors/tc.plugin/tc-qos-helper.sh @@ -3,7 +3,7 @@ # netdata # real-time performance and health monitoring, done right! # (C) 2017 Costa Tsaousis <costa@tsaousis.gr> -# GPL v3+ +# 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 @@ -14,6 +14,47 @@ export LC_ALL=C # ----------------------------------------------------------------------------- +# logging functions + +PROGRAM_FILE="$0" +PROGRAM_NAME="$(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 @@ -52,60 +93,24 @@ if [ ! -d "${fireqos_run_dir}" ] if [ -d "${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/wiki/You-should-install-QoS-on-all-your-servers" fi fi # ----------------------------------------------------------------------------- -# logging functions - -PROGRAM_FILE="$0" -PROGRAM_NAME="$(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() { - [ $debug -eq 1 ] && log DEBUG "${@}" -} - - -# ----------------------------------------------------------------------------- [ -z "${NETDATA_PLUGINS_DIR}" ] && NETDATA_PLUGINS_DIR="$(dirname "${0}")" -[ -z "${NETDATA_CONFIG_DIR}" ] && NETDATA_CONFIG_DIR="$(dirname "${0}")/../../../../etc/netdata" +[ -z "${NETDATA_USER_CONFIG_DIR}" ] && NETDATA_USER_CONFIG_DIR="/usr/local/etc/netdata" +[ -z "${NETDATA_STOCK_CONFIG_DIR}" ] && NETDATA_STOCK_CONFIG_DIR="/usr/local/lib/netdata/conf.d" plugins_dir="${NETDATA_PLUGINS_DIR}" -config_dir="${NETDATA_CONFIG_DIR}" tc="$(which tc 2>/dev/null || command -v tc 2>/dev/null)" @@ -134,10 +139,17 @@ update_every=$((t)) # ----------------------------------------------------------------------------- # allow the user to override our defaults -if [ -f "${config_dir}/tc-qos-helper.conf" ] - then - source "${config_dir}/tc-qos-helper.conf" -fi +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}'..." + source "${CONFIG}" + [ $? -ne 0 ] && error "Failed to load config file '${CONFIG}'." + else + warning "Cannot find file '${CONFIG}'." + fi +done case "${tc_show}" in qdisc|class) diff --git a/collectors/tc.plugin/tc-qos-helper.sh.in b/collectors/tc.plugin/tc-qos-helper.sh.in new file mode 100755 index 000000000..6f6b0a591 --- /dev/null +++ b/collectors/tc.plugin/tc-qos-helper.sh.in @@ -0,0 +1,315 @@ +#!/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_FILE="$0" +PROGRAM_NAME="$(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="$1" + local t=$(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="$(which fireqos 2>/dev/null || command -v fireqos 2>/dev/null)" + + if [ ! -z "${fireqos}" ] + then + + fireqos_exec_dir="$(realdir ${fireqos})" + + if [ ! -z "${fireqos_exec_dir}" -a "${fireqos_exec_dir}" != "." -a -f "${fireqos_exec_dir}/install.config" ] + then + + LOCALSTATEDIR= + 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/wiki/You-should-install-QoS-on-all-your-servers" + 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="$(which tc 2>/dev/null || command -v tc 2>/dev/null)" + + +# ----------------------------------------------------------------------------- +# user configuration + +# time in seconds to refresh QoS class/qdisc names +qos_get_class_names_every=120 + +# time in seconds to exit - netdata will restart the script +qos_exit_every=3600 + +# what to use? classes or qdiscs? +tc_show="qdisc" # can also be "class" + + +# ----------------------------------------------------------------------------- +# check if we have a valid number for interval + +t=${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 '${CONFIG}'..." + source "${CONFIG}" + [ $? -ne 0 ] && error "Failed to load config file '${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 $1 +} + +# if found and included, this file overwrites loopsleepms() +# with a high resolution timer function for precise looping. +. "${plugins_dir}/loopsleepms.sh.inc" + + +# ----------------------------------------------------------------------------- +# final checks we can run + +if [ -z "${tc}" -o ! -x "${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="${1}" + + if [ -f /etc/iproute2/tc_cls ] + then + local classid name rest + while read classid name rest + do + [ -z "${classid}" -o -z "${name}" -o "${classid}" = "#" -o "${name}" = "#" -o "${classid:0:1}" = "#" -o "${name:0:1}" = "#" ] && continue + setclassname "" "${name}" "${classid}" + done </etc/iproute2/tc_cls + return 0 + fi + return 1 +} + +show_fireqos_names() { + local x="${1}" name n interface_dev interface_classes interface_classes_monitor + + if [ -f "${fireqos_run_dir}/ifaces/${x}" ] + then + name="$(<"${fireqos_run_dir}/ifaces/${x}")" + echo "SETDEVICENAME ${name}" + + interface_dev= + interface_classes= + interface_classes_monitor= + source "${fireqos_run_dir}/${name}.conf" + for n in ${interface_classes_monitor} + do + setclassname ${n//|/ } + done + [ ! -z "${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 ${x} + + # check FireQOS names for classes + if [ ! -z "${fix_names}" ] + then + show_fireqos_names "${x}" || show_tc_cls "${x}" + fi + + echo "END ${x}" +} + +find_tc_devices() { + local count=0 devs= dev rest l + + # find all the devices in the system + # without forking + while IFS=":| " read dev rest + do + count=$((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 ${dev} 2>/dev/null)" + [ ! -z "${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=$((qos_exit_every / update_every)) + +c=0 +gc=0 +while [ 1 ] +do + fix_names= + c=$((c + 1)) + gc=$((gc + 1)) + + if [ ${c} -le 1 -o ${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 |