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Full Discussion: Running a function on a remote server via SSH in a script
Top Forums Shell Programming and Scripting Running a function on a remote server via SSH in a script Post 302376178 by DeCoTwc on Monday 30th of November 2009 11:19:31 PM
Old 12-01-2009
Running a function on a remote server via SSH in a script
I'm working on a script (mostly for practice) to simplify a task I have to do every now and then. I have a cluster with 6 servers on it, each server has a directory with a set of files called *.pid and *.mpid. Each file contains the pid of a process that may or may not be running on that server. I'm trying to create a script that will hop to each server, collect what pid/mpid files there are, and then check to see if that process is actually running or not.

I've gotten it running using a pretty simple (albeit ugly) one liner:

Code:
 for i in 1 2 3 4 5 6 ;do echo "SYS0$i"; ssh sys0$i 'for i in `ls /usr/local/isa/run/`;do x=$(ps -ef|grep `cat /usr/local/isa/run/$i`|grep -v grep);if [[ $x = "" ]];then echo "$i is not running";else echo "$i is running";fi;done';done
SYS01
SYS02
BmsUI.mpid is running
BmsUI.pid is running
CORBAnameservice.mpid is running
CORBAnameservice.pid is running
CORBAnotificationservice.mpid is running
CORBAnotificationservice.pid is running
SYS03
ServiceGateway.mpid is running
ServiceGateway.pid is running
ETC

However, I'd like to be able to create a prettier looking script to do the same thing. I thought for neatness sake I could just put all of the logic in a function at the beginning of the script and then ssh to each server and call on the function, but that doesn't seem to work.

Code:
root@bms-nycnm-srv02:/root/procCheck# cat procCheck
#!/bin/bash
check ()
{
for file in `ls /usr/local/isa/run`
do
proc=$(ps -ef|grep `cat /usr/local/isa/run/$file`|grep -v grep)
if [[ $proc = "" ]];then
echo "$file has a pid/mpid file, but is not running"
else
echo "$file is running"
fi
done
}
for i in 1 2 3 4 5 6
do
echo "SYS0$i"
ssh sys0$i 'check'
done

I assume the issue is that once the script jumps to a new server and starts a subshell, it forgets about what ever functions I've declared in the first place. Any help or advice I'd appreciate it.
 

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LEARN ABOUT SUSE

installsieve

INSTALLSIEVE(1) 					      General Commands Manual						   INSTALLSIEVE(1)

 *

NAME

       installsieve - user utility for managing sieve scripts

SYNOPSIS

       installsieve

DESCRIPTION

       installsieve is a utility that allows users to manage their sieve scripts kept on the server.

OPTIONS

       -v <name> View script with the given name. The script if retrieved sucessfully is output to standard output.

       -l  List  all  of  the scripts currently on the server. If one of the scripts is active a arrow is printed indicating that it is the active
       script.

       -p <port> Port to connect to. If left off this defaults to "sieve" as defined in /etc/services.

       -i <file> Install a file onto the server. If a script with the same name already exists on the server it is overwritten.  Upon  sucessfully
       putting	the  script on the server the script is set active. If <file> has the extension .script it is chopped when put on the server since
       sieve names may not contain a '.'.

       -a <name> Set <name> as the active script. The list of available names can be obtained from the '-l' option..

       -d <name> Delete the sieve script on the server with <name>.

       -m <mechanism> Force installsieve to use <mechanism> for authentication. If not specified the strongest authentication mechanism is chosen.

       -g <name> Get the sieve script with <name> and save it to disk with a ".script" extension. If a file with that name already  exists  it	is
       overwritten.

       -u <user> Userid/Authname to use for authentication; by default, the current user.

CMU
								   Project Cyrus						   INSTALLSIEVE(1)
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