A nodes ping test script

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Here is a quick script, quite easy, but useful if you have large number of nodes to manage and you want to make sure their network can reach each other. It's true, there are tons of tools you can use to monitor a node, but when you suspect network problem, you want to make sure network connection between nodes. Here it is.

It uses quiet ping mode, so doesn't generate too much noise on your screen.

#!/bin/bash

if [ -f "/etc/release" ] ; then
myname=$(hostname)
cmd="/usr/sbin/ping -v -U"
else
myname=$(hostname -s)
cmd="ping -q -c 1 -w 2"
fi
me=$(whoami)

mylog="/var/tmp/"$myname"_"$me"_ping.log"

hostlist="aaa bbb ccc ddd "

issues="no"
for h in $hostlist ; do
out=$($cmd $h 2>/dev/null)
if [ $? -ne 0 ] ; then
    issues="yes"
    ts=$(date +"%b %d %H:%M:%S")
    lastline=$(echo "$out"|tail -1)
    echo "$ts $h $lastline" >>$mylog
fi
done

if [ "$issues" = "yes" ] ; then
echo -e "\e[0;31m Some ping lost seen for $myname, see $mylog for detail ! \e[0m"
else
echo -e "\e[0;32m All good, $myname can ping all other nodes !\e[0m";
fi

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