#!/usr/bin/env bash REMOTE_OK=remote_ok REMOTE_FAIL=remote_fail TIMESTAMP=`date +%F%H%M%S` CURRENT_HTML=/var/www/html/${TIMESTAMP}.html CURRENT_INDEX=/var/www/html/index.html LN=/bin/ln SERVER_LIST=server_list PASS=pass cat <<EOF > $CURRENT_HTML <html> <head> <title>Server Alive Monitor</title> </head> <body> <table width="50%" border="1" cellpading="1" cellspaceing="0" > <caption><h2>Server Alive Status</h2></caption> <tr><th>Server Name</th><th>Server Satus</th><th>Server Load</th></tr> EOF while read SERVERS do REMOTE_RESULT=`sshpass -f $PASS ssh -n root@$SERVERS "uptime"` # "-n" redirects stdin from /dev/null if [ $? -eq 0 ];then STATUS=OK COLOR=blue echo $REMOTE_RESULT > $REMOTE_OK REMOTE_LOAD=`cat ${REMOTE_OK}| awk -F ":" '{print $4}'` echo "<tr><td>$SERVERS</td><td><font color=$COLOR>$STATUS</font></td><td>$REMOTE_LOAD</td></tr>" >> $CURRENT_HTML else STATUS=FALSE COLOR=red echo "Server is unavailable" > $REMOTE_FAIL REMOTE_LOAD=$(cat $REMOTE_FAIL) echo "<tr><td>$SERVERS</td><td><font color=$COLOR>$STATUS</font></td><td>$REMOTE_LOAD</td></tr>" >> $CURRENT_HTML fi done < $SERVER_LIST cat <<EOF >> $CURRENT_HTML </table> </body> </html> EOF $LN -sf $CURRENT_HTML $CURRENT_INDEX
