[Starcluster] connection.execute behavior

[Justin Riley]

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Hi Dan,

Try using the internal dns names instead of the public dns names and see
if that helps:

ie solr_conn.execute('ssh -f -N -L 27017:localhost:27017
gotdata at dom-blah-blah.internal')

~Justin

On 04/16/2010 08:04 AM, Dan Yamins
wrote:
> Here are two places where behavior of executing a command via
> connection.execute is different from executing it at the actual shell,
> causing trouble:
> 
> 
> 1) I can run this command fine at the actual shell of one of my node,
> when logged in as root:
> 
>    su gotdata -c "ssh -f -N -L 27017:localhost:27017
> gotdata at ec2-184-73-101-141.compute-1.amazonaws.com
> <mailto:gotdata at ec2-184-73-101-141.compute-1.amazonaws.com>"
> 
> It runs, returns without  blocking, doing exactly what I want
> (establishing an ssh tunnel from one node to another on port 27017). 
> 
> But when I try to execute this command over the execute method in the
> starcluster shell, it DOES block:
> 
>    solr_conn.execute('su gotdata -c "ssh -f -N -L 27017:localhost:27017
> gotdata at ec2-184-73-101-141.compute-1.amazonaws.com
> <mailto:gotdata at ec2-184-73-101-141.compute-1.amazonaws.com>"')
> 
> ... and only returns when I manually kill the ssh tunnel that it
> starts.    What should I do to get what I want?
> 
> 
> 2) The same command, minus the su part, runs fine at the actual shell:
> 
>    ssh -f -N -L 27017:localhost:27017
> gotdata at ec2-184-73-101-141.compute-1.amazonaws.com
> <mailto:gotdata at ec2-184-73-101-141.compute-1.amazonaws.com>
> 
> but when I run this command via the execute method, it fails:
> 
>    In [31]: solr_conn.execute('ssh -f -N -L 27017:localhost:27017
> gotdata at ec2-184-73-101-141.compute-1.amazonaws.com
> <mailto:gotdata at ec2-184-73-101-141.compute-1.amazonaws.com>')
>    Out[31]: ['Host key verification failed.']
> 
> Why is the behavior different?
> 
> 
> Thanks,
> Dan
> 
> 
> 
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