munin-plugins/mikrotik/mt_system

#!/bin/bash
#%# family=auto
#%# capabilities=autoconf

# Michael Grote
# michael.grote ät posteo.de
# This plugin fetches multiple Values from a mikrotik device.
# tested with a RB750GR3 and CRS309.

# A User is needed for this plugin to work:
# /user add name=munin group=read password=hallowelt address=<munin-server-ip>

# plugin config:
# [mt_system_<name>]
# user root
# env.ssh_user munin
# env.ssh_password hallowelt
# env.ssh_host 192.168.2.1

# TODO:
# - [ ] free-hdd-space: 4760.0KiB
# - [ ] total-hdd-space: 16.3MiB
# - [ ] free-memory: 210.2MiB
# - [ ] total-memory: 256.0MiB
  # - [ ] limit als % von total
# - [ ] uptime: 1w4d22h29m28s
# - [ ] linter
# - [ ] diagramm erklärungen label
# - [ ] doku depencies
# - [ ] check bc

# setze Variablen mit default-Werten
ssh_user=${ssh_user:-user}
ssh_password=${ssh_password:-password}
ssh_host=${ssh_host:-192.168.2.1}
c=0 # zähler; wird für verschiedene Schleifen benötigt


# Funktionen
function get_name {
  while read -r line; do
    if echo $line | grep 'name:' > /dev/null; then
      name=$(echo $line | grep name: | awk '{ print $2 }')
    fi
  done <<< "$data"
}
function get_cpu_count {
  while read -r line; do
    if echo $line | grep 'cpu-count' > /dev/null; then
      anzahl_cpu=$(echo $line grep cpu-count: | sed -r 's/(cpu-count: )([0-9]+)/\2/g' | tr -dc '[0-9]')
    fi
  done <<< "$data"
}
function check_sshpass {
  if [[ $(dpkg -l sshpass > /dev/null 2>&1) -ne "0" ]] ; then
    echo "could not find sshpass"
    exit 1
  fi
}

function get_voltage_label {
  while read -r line; do # für jede zeile in... ; siehe "done"
    # gebe die zeile aus
    # suche mit awk nach "voltage:"
    # wenn gefunden:
    # gebe jede zeile per print text aus
    # externe/bash-variablen mit "'"<var>"'"
    echo $line | awk '/voltage:/{
      print "multigraph voltage_graph_""'"$name"'";
      print "graph_title voltage " "'"$name"'";
      print "graph_vlabel volt";
      print "graph_category mikrotik";
      print "graph_args -l 0";
      print "voltage.label voltage"
      }'
  done <<< "$data" # der variable data
}
function get_voltage_value {
  while read -r line; do
    # funktion wie bei den "label"-funktionen
    # gib überschrift aus wenn dirtyconfig nicht gesetzt ist
    # weil aufruf dann nicht in "config" erfolgt
    # wenn dirtyconfig nicht gesetzt sind, gebe überschrift aus
    if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
      echo $line | awk '/voltage:/{
        print "multigraph voltage_graph_""'"$name"'";
        }'
    fi
    # entferne mit gsub das zeichen % in wert $2
    # gebe $2 aus
    echo $line | awk '/voltage:/{
      gsub(/V/,"",$2);
      print "voltage.value " $2
      }'
  done <<< "$data"
}

function get_bad_blocks_label {
  while read -r line; do
    echo $line | awk '/bad-blocks:/{
      print "multigraph bad_blocks_graph_""'"$name"'";
      print "graph_title bad blocks " "'"$name"'";
      print "graph_vlabel %";
      print "graph_category mikrotik";
      print "graph_args -l 0 --upper-limit 100";
      print "bad_blocks.label bad_blocks";
      print "bad_blocks.warning 2";
      print "bad_blocks.critical 25"
      }'
  done <<< "$data"
}
function get_bad_blocks_value {
  while read -r line; do
    if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
    echo $line | awk '/bad-blocks:/{
      print "multigraph bad_blocks_graph_""'"$name"'";
      }'
    fi
    echo $line | awk '/bad-blocks:/{
      gsub(/%/,"",$2);
      print "bad_blocks.value " $2
      }'
  done <<< "$data"
}

function get_write_sect_total_label {
  while read -r line; do
    echo $line | awk '/write-sect-total:/{
      print "multigraph write_sect_total_graph_""'"$name"'";
      print "graph_title Total sector writes " "'"$name"'";
      print "graph_vlabel count";
      print "graph_category mikrotik";
      print "graph_args -l 0";
      print "write_sect_total.label write_sect_total"
      }'
  done <<< "$data"
}
function get_write_sect_total_value {
  while read -r line; do
    if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
      echo $line | awk '/write-sect-total:/{
        print "multigraph write_sect_total_graph_""'"$name"'";
        }'
    fi
    echo $line | awk '/write-sect-total:/{
      print "write_sect_total.value " $2
      }'
  done <<< "$data"
}

function get_write_sect_since_reboot_label {
  while read -r line; do
    echo $line | awk '/write-sect-since-reboot:/{
      print "multigraph write_sect_since_reboot_graph_""'"$name"'";
      print "graph_title Sector writes since reboot " "'"$name"'";
      print "graph_vlabel count";
      print "graph_category mikrotik";
      print "graph_args -l 0";
      print "write_sect_since_reboot.label write_sect_since_reboot"
      }'
  done <<< "$data"
}
function get_write_sect_since_reboot_value {
  while read -r line; do
    if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
      echo $line | awk '/write-sect-since-reboot:/{
        print "multigraph write_sect_since_reboot_graph_""'"$name"'";
      }'
    fi
    echo $line | awk '/write-sect-since-reboot:/{
      print "write_sect_since_reboot.value " $2
      }'
  done <<< "$data"
}

function get_temperature_label {
  while read -r line; do
    echo $line | awk '/temperature:/{
      print "multigraph temperature_graph_""'"$name"'";
      print "graph_title temperature " "'"$name"'";
      print "graph_vlabel °C";
      print "graph_category mikrotik";
      print "graph_args -l 0";
      print "temperature.label cpu temperature";
      print "temperature.warning 75";
      print "temperature.critical 90"
      }'
  done <<< "$data"
}
function get_temperature_value {
  while read -r line; do
    if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
      echo $line | awk '/temperature:/{
        print "multigraph temperature_graph_""'"$name"'";
        }'
    fi
    echo $line | awk '/temperature:/{
      gsub(/C/,"",$2);
      print "temperature.value " $2
      }'
  done <<< "$data"
}

function get_cpu_label {
  echo multigraph cpu_load_graph_$name
  echo graph_title cpu load $name
  echo graph_vlabel %
  echo graph_category mikrotik
  echo graph_args -l 0 --upper-limit 100
  echo cpu_total.label total load
  echo cpu_total.warning 75
  echo cpu_total.critical 90
  while [ "$c" -lt "$anzahl_cpu" ]; do
    while read -r line; do
      echo $line | grep cpu$c | awk '{
        print "cpu"'"$c"'"_load.label " "cpu" "'"$c"'" " load"
        print "cpu"'"$c"'"_irq.label " "cpu" "'"$c"'" " irq"
        print "cpu"'"$c"'"_disk.label " "cpu" "'"$c"'" " disk"
        }'
    done <<< "$data"
    c=$(( $c + 1 ))
  done
}
function get_cpu_value {
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
    echo multigraph cpu_load_graph_$name
  fi
  while read -r line; do
    echo $line | awk '/cpu-load:/{
      gsub(/%/,"",$2);
      print "cpu_total.value " $2
      }'
  done <<< "$data"
  c=0
  while [ "$c" -lt "$anzahl_cpu" ]; do
    while read -r line; do
      echo $line | grep cpu$c | awk '{
        gsub(/%/,"",$3);
        gsub(/%/,"",$4);
        gsub(/%/,"",$5);
        print "cpu"'"$c"'"_load.value " $3
        print "cpu"'"$c"'"_irq.value " $4
        print "cpu"'"$c"'"_disk.value " $5
        }'
    done <<< "$data"
    c=$(( $c + 1 ))
  done
}

function get_memory_label {
  while read -r line; do
    echo $line | awk '/free-memory:/{
      print "multigraph memory_graph_""'"$name"'";
      print "graph_title memory " "'"$name"'";
      print "graph_vlabel MiB";
      print "graph_category mikrotik";
      print "graph_args -l 0";
      print "total_memory.label total memory";
      print "used_memory.label used memory";
      print "free_memory.label free memory";
      }'
  done <<< "$data"
}
function get_memory_value {
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "0" ]; then
    echo multigraph memory_$name
  fi
  while read -r line; do
    echo $line | awk '/total-memory:/{
        gsub(/MiB/,"",$2);
        print "total_memory.value " $2
      }'
  done <<< "$data"
  while read -r line; do
    echo $line | awk '/free-memory:/{
        gsub(/MiB/,"",$2);
        print "free_memory.value " $2
      }'
  done <<< "$data"
  # berechne used-memory
  # gesamt + frei = benutzt
  mem_total=$(
    while read -r line; do
      echo $line | awk '/total-memory:/{ gsub(/MiB/,"",$2); print $2 }' | tr -dc '[0-9.]'
    done <<< "$data")
  mem_free=$(
    while read -r line; do
      echo $line | awk '/free-memory:/{ gsub(/MiB/,"",$2); print $2 }' | tr -dc '[0-9.]'
    done <<< "$data")
  echo used_memory.value $(echo $mem_total-$mem_free| bc)
  # prufe noch ob war gesetzt
}

# rufe funktionen auf, reihenfolge ist wichtig
check_sshpass
# hole daten per ssh
data=$(sshpass -p $ssh_password ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no $ssh_user@$ssh_host -q ':delay 6s; /system health print; /system resource print; /system resource cpu print; /system identity print')
get_name
get_cpu_count


# munin-Logik
# wenn $1 = X; dann
if [ "$1" = "autoconf" ]; then
  echo yes
  exit 0
fi
if [ "$1" = "config" ]; then
  # gebe label aus
  # wenn dirtyconfig gesetzt rufe value funktion auf
  get_voltage_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_voltage_value
  fi
  get_bad_blocks_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_bad_blocks_value
  fi
  get_write_sect_total_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_write_sect_total_value
  fi
  get_write_sect_since_reboot_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_write_sect_since_reboot_value
  fi
  get_temperature_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_temperature_value
  fi
  get_cpu_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_cpu_value
  fi
  get_memory_label
  if [ "$MUNIN_CAP_DIRTYCONFIG" = "1" ]; then
    get_memory_value
  fi
  exit 0
fi
# wird nie aufgerufen wenn dirtyconfig gesetzt ist
# dann wird nur config aufgerufen und dabei werden zusätzlich die values ausgegeben
get_voltage_value
get_bad_blocks_value
get_write_sect_total_value
get_write_sect_since_reboot_value
get_temperature_value
get_cpu_value
get_memory_value
exit 0


# Beispieloutput:
#  voltage: 24.5V
#  temperature: 46C
#  uptime: 1w6d17h12m25s
#  version: 6.48.4 (stable)
#  build-time: Aug/18/2021 06:43:27
#  factory-software: 6.46.3
#  free-memory: 209.9MiB
#  total-memory: 256.0MiB
#  cpu: MIPS 1004Kc V2.15
#  cpu-count: 4
#  cpu-frequency: 880MHz
#  cpu-load: 0%
#  free-hdd-space: 4760.0KiB
#  total-hdd-space: 16.3MiB
#  write-sect-since-reboot: 46412
#  write-sect-total: 62012
#  bad-blocks: 0%
#  architecture-name: mmips
#  board-name: hEX
#  platform: MikroTik
#  # CPU  LOAD  IRQ  DISK
#  0 cpu0  0%  0%  0%
#  1 cpu1  1%  1%  0%
#  2 cpu2  0%  0%  0%
#  3 cpu3  1%  0%  0%
#  name: hEX