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File name : check_a2_packets.mvps

Content :#!/bin/bash # Ref - SYSENG-26866 - Alert if packets per second crosses 30k/s # _packet_per_sec_collect() { _packets_warn=20000 _packets_crit=30000 _packets_last_file="/tmp/packets_incoming_count" # first create a file to save first value if [ ! -f "${_packets_last_file}" ]; then grep -Ev 'lo:' /proc/net/dev | tail -1 | awk '{print $3}' > ${_packets_last_file} exit else # find delta packet value and calculate by seconds # alert or warn as needed _packets_last_file_age=$(stat -c %Y -- ${_packets_last_file}) _packets_dt_current=$(date +%s) _packets_last_file_age_seconds=$(( _packets_dt_current - _packets_last_file_age )) _packets_last=$(cat ${_packets_last_file}) _packets_current=$(grep -Ev 'lo:' /proc/net/dev | tail -1 | awk '{print $3}') if [ "${_packets_current}" -gt "${_packets_last}" ] && [ "${_packets_last_file_age_seconds}" -gt 1 ]; then _packets_delta_f=$(( _packets_current - _packets_last )) _packets_delta=$(( _packets_delta_f / _packets_last_file_age_seconds )) fi if [ -n "${_packets_delta}" ]; then if [ "${_packets_delta}" -gt "${_packets_warn}" ] && [ "${_packets_delta}" -lt "${_packets_crit}" ]; then echo "$(hostname) has ${_packets_delta} received packets per second" exit 1 elif [ "${_packets_delta}" -gt "${_packets_crit}" ]; then echo "$(hostname) has ${_packets_delta} received packets per second" exit 2 else echo "$(hostname) has ${_packets_delta} received packets per second" exit 0 fi else echo "$(hostname) has 0 received packets per second" exit 0 fi fi grep -Ev 'lo:' /proc/net/dev | tail -1 | awk '{print $3}' > ${_packets_last_file} } _packet_per_sec_collect

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