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Script that tries to connect via SSH till connection is up

 
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# 1  
Old 08-09-2013
Script that tries to connect via SSH till connection is up
Hey,

I need a script that tries to connect via SSH to a remote server
and that remote server might not be up yet, so retry until succeed
the error message I get if the server is not up yet is:
Code:
ssh: connect to host 127.0.0.1 port 40001: Connection refused

any idea of a good way to do it ?

Thanks!
Last edited by OdedOvdat; 08-12-2013 at 04:33 PM..
# 2  
Old 08-09-2013
Code:
#bin/ksh
while :
do
   ssh myServer && break
done

# 3  
Old 08-09-2013
Suggestion: Use -q option to suppress ssh output.
# 4  
Old 08-12-2013
For safety, add a sleep to such I/O loop
Code:
while sleep 1
do
   ssh -q myServer && break
done

or
Code:
until ssh -q myServer
do
  sleep 1
done

# 5  
Old 08-12-2013
Quote:
Originally Posted by MadeInGermany
For safety, add a sleep to such I/O loop
True. As the server could be not responding for another reason (like keys not being exchanged) I'd also add a safety measure against ssh asking interactively for passwords. Using your suggestion:

Code:
until ssh -o BatchMode yes -q myServer ; do
       sleep 1
done

I hope this helps.

bakunin
# 6  
Old 08-13-2013
Works great
thanks guys
 
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