Shell Programming and Scripting

Please help me out with one highlighted in RED

#!/bin/bash
STAGING_HOSTS="san man hand"
for HOST in $STAGING_HOSTS
do
ssh $HOST <<EOT
echo "CVServer is being stopped on $HOST "
pkill CVServer
sleep 20
echo "!!! Checking if CVServer is DOWN on $HOST !!!"
ps -ef | grep CVServer | grep -v grep
CHECK_PROCESS=$?
if [ $CHECK_PROCESS = 0 ]; then
PROCESS_ID=`ps -ef|grep CVServer|grep -v grep |awk '{print $2}'`
echo "CVServer is still running with $PROCESS_ID , Hence killing it..."
kill -9 $PROCESS_ID
sleep 5
ps -ef | grep CVServer | grep -v grep
# elif [ $? = 0 ]; then
# echo "Process is still running... Hence killing it"
# kill -9 $PROCESS_ID
else
echo "!!! CVServer is DOWN on $HOST !!!"
fi
echo "Bringing UP the CVServer on $HOST "
/abc/def/ghi/CvServer/default/sbin/Start_CVServer
sleep 10
ps -ef | grep CVServer | grep -v grep
if [ $? = 0 ];
then
PROCESS_ID_UP=`ps -ef|grep CVServer|grep -v grep |awk '{print $2}'`
echo "CVServer is UP on $HOST with $PROCESS_ID_UP id $PROCESS_ID_UP "
##Here the code gets stuck...not able to come out and login to other server mentioned in STAGING_HOSTS variable
else
echo "CVServer is not UP on $HOST with $PROCESS_ID_UP id "
fi
EOT
done
}
mv -f $LOG $LOG.old
stuff $* 2>&1 | tee $LOG


SCREEN OUTPUT
---------------
Pseudo-terminal will not be allocated because stdin is not a terminal.
CVServer is being stopped on man
!!! Checking if CVServer is already DOWN on man !!!
-bash: line 9: [: =: unary operator expected
!!! CVServer is DOWN on man !!!
Bringing UP the CVServer on man
gtp 26508 1 0 07:50:01 ? 0:00 /abc/def/ghi/CvServer/default/bin/CVServer
CVServer is UP on wedges1 with id 26508
^Csan:/tmp>

Your output and the script don't match.

Also, calling a remote script using <<< is a little odd. Also realize, that expressions like:

Code:

CHECK_PROCESS=$?
if [ $CHECK_PROCESS = 0 ]; then

gets interpolated first on the localhost. So the command that is actually processed on the remote server might be:

Code:

CHECK_PROCESS=
if [ = 0 ]; then

The first command after <<< EOT should be set -x.

otheus,

I used the set -x option. but still the problem is not resolved.
I am still not able to come out of the loop . the code gets stucks there itself.

Pls help,.

the set -x option is for debugging. You should see some debugging output from the shell. It will be in the log file you created. Post that please.

Here is the log

wedges1:/tmp> ./test
mv: cannot access /ilx/ops/log/test.log
tee: /ilx/ops/log/test.log: No such file or directory
Pseudo-terminal will not be allocated because stdin is not a terminal.
+ echo 'CVServer is being stopped on drivers1 '
CVServer is being stopped on drivers1
+ pkill CVServer
+ sleep 10
+ echo '!!! Checking if CVServer is DOWN on drivers1 !!!'
!!! Checking if CVServer is DOWN on drivers1 !!!
!!! CVServer is DOWN on drivers1 !!!
Bringing UP the CVServer on drivers1
+ ps -ef
+ grep CVServer
+ grep -v grep
+ CHECK_PROCESS=
+ '[' = 0 ']'
-bash: line 10: [: =: unary operator expected
+ echo '!!! CVServer is DOWN on drivers1 !!!'
+ echo 'Bringing UP the CVServer on drivers1 '
+ . /ilx/gtp/pkg/CVServer/CURRENT/sbin/Start_CVServer
++ GTP_ROOT=/ilx/gtp
++ CVSERVER_PATH=/ilx/gtp/pkg/CVServer
++ CVSERVER_BINARY=CVServer
++ PID_FILE=/ilx/gtp/pkg/CVServer/data/.CVServer.Pid
++ LOCK_FILE=/ilx/gtp/pkg/CVServer/data/.CVServer.Lock
+++ which rm
++ RM=/usr/bin/rm
+++ which kill
++ KILL=/usr/bin/kill
++ GTP_CONTROL_LIB_ROOT=/ilx/gtp/pkg/GTPcontrol
++ export GTP_CONTROL_LIB_ROOT
++ LD_LIBRARY_PATH=/ilx/gtp/lib:
++ export LD_LIBRARY_PATH
++ '[' -f /ilx/gtp/pkg/CVServer/data/.CVServer.Lock ']'
+++ which sleep
++ SLEEP=/usr/bin/sleep
++ /usr/bin/sleep 4
++ /usr/bin/sleep 2
++ /ilx/gtp/pkg/CVServer/CURRENT/bin/CVServer
+ sleep 5
+ ps -ef
gtp 17464 16775 0 09:38:30 ? 0:03 /ilx/gtp/pkg/CVServer/CURRENT/bin/CVServer
CVServer is UP on drivers1 with id
+ grep CVServer
+ grep -v grep
+ '[' 0 = 0 ']'
+ PROCESS_ID_UP=14624
+ echo 'CVServer is UP on drivers1 with id '
^Cwedges1:/tmp>

replace

Code:

ps -ef | grep CVServer | grep -v grep
CHECK_PROCESS=$?
if [ $CHECK_PROCESS = 0 ]; then

with

Code:

if ps -ef | grep CVServer | grep -v grep; then

Bit the code stuck at the below... and not able to comeout of remote shell.

. /ilx/gtp/pkg/CVServer/CURRENT/sbin/Start_CVServer
sleep 5
ps -ef | grep CVServer | grep -v grep
if [ $? = 0 ];
then
PROCESS_ID_UP=`ps -ef|grep CVServer|grep -v grep |awk '{print $2}'`
echo "CVServer is UP on $HOST with id $PROCESS_ID_UP "
else
echo "CVServer is not UP on $HOST with $PROCESS_ID_UP id "
fi
EOT
done
}