modules/private/monitoring/plugins/check_redis_replication

   1 #!/bin/bash
   2
   3 STATE_OK=0
   4 STATE_WARNING=1
   5 STATE_CRITICAL=2
   6 STATE_UNKNOWN=3
   7
   8 socket=$1
   9
  10 info=$(redis-cli -s $socket info replication)
  11 lag=$(echo "$info" | grep master_last_io_seconds_ago | cut -d":" -f2 | sed -e "s/\s//g")
  12 slave_offset=$(echo "$info" | grep slave_repl_offset | cut -d":" -f2 | sed -e "s/\s//g")
  13 master_offset=$(echo "$info" | grep master_repl_offset | cut -d":" -f2 | sed -e "s/\s//g")
  14 offset=$(($master_offset - $slave_offset))
  15
  16 exit_code=$?
  17
  18 if [[ $exit_code -ne 0 ]]; then
  19   echo "UNKNOWN - Impossible to run redis command"
  20   exit $STATE_UNKNOWN
  21 elif [[ -z "$lag" ]]; then
  22   echo "UNKNOWN - No replication found"
  23   exit $STATE_UNKNOWN
  24 else
  25   output="Replication lag for redis is ${lag}s and offset is ${offset}"
  26   LC_ALL=C lag=$(printf "%.*f" 0 $lag)
  27
  28   if [[ $lag -lt 5 && $offset -lt 5 ]]; then
  29     echo "OK - $output"
  30     exit $STATE_OK
  31   elif [[ $lag -lt 10 && $offset -lt 10 ]]; then
  32     echo "WARNING - $output"
  33     exit $STATE_WARNING
  34   else
  35     echo "CRITICAL - $output"
  36     exit $STATE_CRITICAL
  37   fi
  38 fi