Vishanth Reddy
asked on
loosing the variable values in SSH session on remote server : bash
I am trying ssh into a remote server, capturing the process ID, and stopping the app using the process ID.
For some reason I am loosing the value of the variable PROCESS in the SSH session, all the logic works fine if i run it locally. Below is the code and the execution part where i am loosing the variable (PROCESS) Value. Can someone tell me why i am not able to capture the echo "$PROCESS" and $PROCESS below.
Stoptomcat()
{
. /apps/web/properties/tomca
for server in "${dev_host_Array[@]}"
do
echo "connecting to the server $server" | tee -a /tmp/tomcat-App-operation.
ssh -q "$server" bash -c "'
PROCESS=`ps -ef | grep $app_name | grep -v "grep" | grep -v "Tom.sh" | awk '{print $2}'`
echo "$PROCESS"
if [ ! -x $PROCESS ]; then
/apps/tomcat/$app_name/bin
pid=$!
declare -i elapsed=0
while ps -p ${pid} >/dev/null; do
sleep 1
if ((++elapsed % 60 == 0)); then
kill -9 $process
exit
fi
done
else
echo " TOMCAT $app_name is already in stopped state"
fi
'"
done
}
Execution:
+ for server in '"${dev_host_Array[@]}"'
+ tee -a /tmp/tomcat-App-operation.
+ echo 'connecting to the server testserver1'
connecting to the server testserver1
++ ps -ef
++ grep -v Tom.sh
++ awk '{print $2}'
++ grep tap
++ grep -v grep
+ ssh -q testserver1 bash -c ''\''
PROCESS=12161
echo
if [ ! -x ]; then
/apps/tomcat/tap/bin/catal
pid=
declare -i elapsed=0
while ps -p >/dev/null; do
sleep 1
if ((++elapsed % 60 == 0)); then
kill -9
exit
fi
done
For some reason I am loosing the value of the variable PROCESS in the SSH session, all the logic works fine if i run it locally. Below is the code and the execution part where i am loosing the variable (PROCESS) Value. Can someone tell me why i am not able to capture the echo "$PROCESS" and $PROCESS below.
Stoptomcat()
{
. /apps/web/properties/tomca
for server in "${dev_host_Array[@]}"
do
echo "connecting to the server $server" | tee -a /tmp/tomcat-App-operation.
ssh -q "$server" bash -c "'
PROCESS=`ps -ef | grep $app_name | grep -v "grep" | grep -v "Tom.sh" | awk '{print $2}'`
echo "$PROCESS"
if [ ! -x $PROCESS ]; then
/apps/tomcat/$app_name/bin
pid=$!
declare -i elapsed=0
while ps -p ${pid} >/dev/null; do
sleep 1
if ((++elapsed % 60 == 0)); then
kill -9 $process
exit
fi
done
else
echo " TOMCAT $app_name is already in stopped state"
fi
'"
done
}
Execution:
+ for server in '"${dev_host_Array[@]}"'
+ tee -a /tmp/tomcat-App-operation.
+ echo 'connecting to the server testserver1'
connecting to the server testserver1
++ ps -ef
++ grep -v Tom.sh
++ awk '{print $2}'
++ grep tap
++ grep -v grep
+ ssh -q testserver1 bash -c ''\''
PROCESS=12161
echo
if [ ! -x ]; then
/apps/tomcat/tap/bin/catal
pid=
declare -i elapsed=0
while ps -p >/dev/null; do
sleep 1
if ((++elapsed % 60 == 0)); then
kill -9
exit
fi
done
ASKER
I want to use that $PROCESS value, in couple of following commands in that remote session, How do i persist and resuse this value in that remote session, till all the commands are processed and exits from that remote SSH session.
As per the execution log, i was able to get the value for PROCESS, but couldn't persist and use it in the next line, such as in echo and if condition below
ssh -q "$server" bash -c "'
PROCESS=`ps -ef | grep $app_name | grep -v "grep" | grep -v "Tom.sh" | awk '{print $2}'`
echo "$PROCESS"
if [ ! -x $PROCESS ]; then
As per the execution log, i was able to get the value for PROCESS, but couldn't persist and use it in the next line, such as in echo and if condition below
ssh -q "$server" bash -c "'
PROCESS=`ps -ef | grep $app_name | grep -v "grep" | grep -v "Tom.sh" | awk '{print $2}'`
echo "$PROCESS"
if [ ! -x $PROCESS ]; then
Try using quotes more structured....
I think it only passed:
only ' for passing a string to the remote ssh process and only " inside it...
mixing quotes is never easy, esp in case like this.
I think it only passed:
"'
PROCESS=`ps -ef | grep $app_name | grep -v "grep" | grep -v "Tom.sh" | awk '{print $2}'`
echo "only ' for passing a string to the remote ssh process and only " inside it...
mixing quotes is never easy, esp in case like this.
Stoptomcat()
{
. /apps/web/properties/tomcat.props
for server in "${dev_host_Array[@]}"
do
echo "connecting to the server $server" | tee -a /tmp/tomcat-App-operation.${now}.txt
ssh -q "$server" bash -c '
PROCESS=$( ps -ef | grep $app_name | grep -v "grep" | grep -v "Tom.sh" | awk "{print $2}")
echo "$PROCESS"
if [ ! -x $PROCESS ]; then
/apps/tomcat/$app_name/bin/catalina.sh stop | tee -a /tmp/tomcat-App-operation.${now}.txt &
pid=$!
declare -i elapsed=0
while ps -p ${pid} >/dev/null; do
sleep 1
if ((++elapsed % 60 == 0)); then
kill -9 $process
exit
fi
done
else
echo " TOMCAT $app_name is already in stopped state"
fi
'
done
}This question needs an answer!
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We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
It was never sent accross or even locally stored... or this is a severe case of miscounted ".... (i didn;t check that...)...
Why not store a remote shell script and run that...
and in the shell script do all the processing....
(f.e. call the script StopTomcat.sh and use:
ssh -q "$server" StopTomcat.sh
to stop it.