Need Looping Script Capability - Only works for one box per day

[Laurie A. Krumrey]

Hi All,

My Script works fine, for only one of my servers going down in any given day. But if
I have 2 or more of my servers go down in one
day, I will only get an email for the first
one.

I need some looping help. I have tried do whiles, do untils, for in. But what I really
think I need is a way to repeat the command
to search for what I want (see INFO in script).
I want to increment and I don't know how.

Or tell it to read till end of file.

Script:

# Look in syslog for any servers going down with today's date
INFO=`grep -i "Going down" va/adm/admin/testsyslog |grep "$MYDATE"`

# Check to see the last server that went down that we sent email about
LAST=`tail -1 $EMAILLOG`

if [ "$INFO" != "" ]; then
MYHOST=`echo $INFO|awk '{print $4}'`
MYTIME=`echo $INFO|awk '{print $1,$2,$3}'`

# Did you already send an email ?
if [ "$MYHOST:$MYTIME" != "$LAST" ]; then

grep $MYHOST:$MYTIME $EMAILLOG > /dev/null 2>&1
echo "$MYHOST went down on $MYTIME" | mailx -s "$MYHOST Down" $ADMIN_EMAIL
echo "$MYHOST:$MYTIME" >> $EMAILLOG
fi
fi

[Sachin Patel · Accepted solution]

Hi Laurie,
for loop for multiple systems

$MACHINE="server1 server2 server3"
for MACHINE in $MACHINES; do
codes......
done

[Sachin Patel]

Hi Laurie,
If you use for loop from one system to get info from remote systems then you have to use remsh
For example

for MACHINE in $MACHINES;do
# Look in syslog for any servers going down with today's date
INFO=`remsh $MACHINE grep -i "Going down" va/adm/admin/testsyslog |grep "$MYDATE"`

# Check to see the last server that went down that we sent email about
LAST=`remsh $MACHINE tail -1 $EMAILLOG`

if [ "$INFO" != "" ]; then
MYHOST=`echo $INFO|awk '{print $4}'`
MYTIME=`echo $INFO|awk '{print $1,$2,$3}'`

# Did you already send an email ?
if [ "$MYHOST:$MYTIME" != "$LAST" ]; then

remsh grep $MYHOST:$MYTIME $EMAILLOG > /dev/null 2>&1
echo "$MYHOST went down on $MYTIME" | mailx -s "$MYHOST Down" $ADMIN_EMAIL
echo "$MYHOST:$MYTIME" >> $EMAILLOG
fi
fi
done

Sachin

[Sridhar Bhaskarla]

Laurie,

This should work. You can verify it by removing the history file.


//start

#!/usr/bin/ksh
INFO=/tmp/info$$
HIST=history
grep -i "Going down" log >> $INFO
SYSLIST=`cat $INFO |awk '{print $4}'|sort |uniq`
ADMIN_EMAIL=some_address


if [ `wc -l $INFO|awk '{print $1}'` -ne 0 ]
then
for SYS in $SYSLIST
do
MYHOST=`grep $SYS $INFO |tail -1 |awk '{print $4}'`
MYTIME=`grep $SYS $INFO |tail -1 |awk '{print $1$2$3}'`
grep $MYHOST:$MYTIME $HIST > /dev/null 2>&1
if [ $? != 0 ]
then
echo "$MYHOST went down on $MYTIME" | mailx -s "$MYHOST Down" $ADMIN_EMAIL
echo "$MYHOST:$MYTIME" >> $HIST
fi
done
fi
//END

-Sri

[Sridhar Bhaskarla]

Hi (again) Laurie,

Danger..danger..danger...

Keep one line at the end. I am sorry.

rm $INFO

otherwise you will end up filling your /tmp with temp files.

Also, you need to replace HIST,log, ADMIN_EMAIL with your values.

-Sri