[Libguestfs] v2v: error while killing ssh-agent after importing VM via xen+ssh

[Shahar Havivi]

On 13.01.16 10:27, Richard W.M. Jones wrote:
> On Wed, Jan 13, 2016 at 09:55:53AM +0200, Shahar Havivi wrote:
> > Hi,
> > 
> > I am successfully importing VM from Xen server at oVirt project via virt-v2v.
> > I am setting ssh-agent and running ssh-add before the import process,
> > after the import done I am trying to kill the agent via:
> > ssh-agent -k (and setting the SSH_AGENT_PID environment), but I get the
> > following error:
> > kill: No such process
> > 
> > Can you please explain why there is no agent?
> 
> When you run:
> 
>    eval `ssh-agent`
I didn't run eval `ssh-agent` but ssh-agnet and then ssh-add (I needed the
SSH_AUTH_SOCK that return from ssh-agent since I am running two different
processes).
I guess I can read the environment SSH_AUTH_SOCK after run eval `ssh-agent`...

do you think there is a different between running with to without eval?
 
  Shahar.
> 
> ssh-agent starts up and creates several environment variables (which
> are added to the environment, because you use the eval `..`).
> In particular it sets SSH_AGENT_PID to its own PID.
> 
> ssh-agent -k is supposed to read SSH_AGENT_PID from the environment
> and kill the previously started ssh-agent process, basically killing
> that PID.
> 
> It works for me and for lots of other people, so I'm guessing you must
> either be running ssh-agent wrongly the first time, or getting the
> SSH_AGENT_PID environment variable mixed up somewhere.
> 
> > Do I need to delete the agent?
> 
> Not necessarily, but if you don't kill the agent then two bad things
> can happen: (1) You get lots of ssh-agent processes building up
> (2) The ssh-agent processes may be storing your unencrypted private
> keys.  Except that ...
> 
> > btw I am also running 'ssh-add -d' after the import process with no problems.
> 
> ... ssh-add -d will remove the private key from the agent.  However
> the agent should still be running after this, so it would have no
> effect on whether ssh-agent -k would succeed.
> 
> Rich.
> 
> -- 
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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