[ale] ssh question [solved]

[Matthew]

http://simontekhacks.blogspot.com/2009/04/yeah-more-notes.html#links

I wrote a how-to on ssh keys. comes in handy.

On Thu, May 10, 2012 at 9:40 AM, Michael H. Warfield <mhw at wittsend.com>wrote:

> On Thu, 2012-05-10 at 08:27 -0400, Edward Holcroft wrote:
> > This is what worked:
>
> > $ sshpass -p '1qazxsw2' ssh -o StrictHostKeyChecking=no -t
> > root at 192.168.50.87 "/etc/init.d/asterisk restart; sleep 5; exit"
>
> The problem you've run into is an old one that been known and discussed
> for a long time.  What happens is that sshd will not exit until all the
> fds are closed, not just that the child has exited.  This is intended to
> insure that any buffered IO has been passed back to the client before
> terminating the server end.  What has happened is that your "asterisk
> restart" process has forked off a daemon (asterisk service) that has not
> closed stdout and stderr so sshd hangs around even though the script is
> done.  By running the commands the way you did in your "solution", you
> run an extra shell to handle the chain of commands with an explicit
> exit.  There are several different ways of handling it, all with their
> pluses and minuses.
>
> The behavior was discussed over on the OpenSSH forums quite some time
> ago and debate invariable boils down to the conclusion - "works by
> design - not a bug - will not fix".  They blame it on the daemon
> processes which did not close out their stdout and stderr fds when they
> forked off the daemon process.
>
> Regards,
> Mike
>
> > On Thu, May 10, 2012 at 7:59 AM, Edward Holcroft <eholcroft at mkainc.com
> >wrote:
> >
> > > Morning all
> > >
> > > I need to run a command on an internal server that will restart a given
> > > service, in this case asterisk, without user intervention. I using
> this:
> > >
> > > sshpass -p '1qazxsw2' ssh -o StrictHostKeyChecking=no
> root at 192.168.50.87/etc/init.d/asterisk restart
> > >
> > > The problem is this command never logs out:
> > >
> > > Stopping safe_asterisk: [  OK  ]
> > > Shutting down asterisk: [  OK  ]
> > > Starting asterisk: [  OK  ]
> > >
> > > .... and there it sits, until I manually close it
> > >
> > > I also tried using -t with the ssh command, which closes the session,
> but
> > > without restarting the service, even though it says it did:
> > >
> > > $ sshpass -p '1qazxsw2' ssh -o StrictHostKeyChecking=no -t
> > > root at 192.168.50.87 "/etc/init.d/asterisk restart"
> > > Stopping safe_asterisk:                                    [FAILED]
> > > Shutting down asterisk:                                    [FAILED]
> > > Starting asterisk:                                         [  OK  ]
> > > Connection to 192.168.50.87 closed.
> > >
> > > I found this article:
> > >
> > > http://www.snailbook.com/faq/background-jobs.auto.html
> > >
> > > And tried:
> > >
> > > $ sshpass -p '1qazxsw2' ssh -o StrictHostKeyChecking=no
> root at 192.168.50.87/etc/init.d/asterisk restart < /dev/null
> > >
> > > which also does not close.
> > >
> > > Any ideas on how I can get this to run the way I want it to?
> > >
> > > ed
> > > --
> > > Edward Holcroft
> > > Madsen Kneppers & Associates Inc.
> > > 3020 Holcomb Bridge Rd. NW
> > > Norcross, GA
> > > 30071
> > > Tel (770) 446-9606
> > > GoogleVoice (678) 587-8649
> > >
> > > WARNING/CONFIDENTIALITY NOTICE:This message may be confidential and/or
> > > privileged. If you are not the intended recipient, please notify the
> sender
> > > immediately then delete it - you should not copy or use it for any
> purpose
> > > or disclose its content to any other person. Internet communications
> are
> > > not secure. You should scan this message and any attachments for
> viruses.
> > > Any unauthorized use or interception of this e-mail is illegal.
> > >
> >
> >
> >
> > --
> > Edward Holcroft
> > Madsen Kneppers & Associates Inc.
> > 3020 Holcomb Bridge Rd. NW
> > Norcross, GA
> > 30071
> > Tel (770) 446-9606
> > GoogleVoice (678) 587-8649
> >
> > WARNING/CONFIDENTIALITY NOTICE:This message may be confidential and/or
> > privileged. If you are not the intended recipient, please notify the
> sender
> > immediately then delete it - you should not copy or use it for any
> purpose
> > or disclose its content to any other person. Internet communications are
> > not secure. You should scan this message and any attachments for viruses.
> > Any unauthorized use or interception of this e-mail is illegal.
> >
> > _______________________________________________
> > Ale mailing list
> > Ale at ale.org
> > http://mail.ale.org/mailman/listinfo/ale
> > See JOBS, ANNOUNCE and SCHOOLS lists at
> > http://mail.ale.org/mailman/listinfo
>
> --
> Michael H. Warfield (AI4NB) | (770) 985-6132 |  mhw at WittsEnd.com
>   /\/\|=mhw=|\/\/          | (678) 463-0932 |
> http://www.wittsend.com/mhw/
>   NIC whois: MHW9          | An optimist believes we live in the best of
> all
>  PGP Key: 0x674627FF        | possible worlds.  A pessimist is sure of it!
>
> _______________________________________________
> Ale mailing list
> Ale at ale.org
> http://mail.ale.org/mailman/listinfo/ale
> See JOBS, ANNOUNCE and SCHOOLS lists at
> http://mail.ale.org/mailman/listinfo
>
>


-- 
SimonTek
912-398-6704
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.ale.org/pipermail/ale/attachments/20120510/b2fa7f61/attachment.html