Re: [Starcluster] connection.execute behavior

From: Justin Riley <no email>
Date: Fri, 16 Apr 2010 10:01:26 -0400

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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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> Starcluster_at_mit.edu
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Received on Fri Apr 16 2010 - 10:01:28 EDT