rgren925 has asked for the wisdom of the Perl Monks concerning the following question:

Hi

I have written some code using Net::OpenSSH and am now trying to use Net::OpenSSH::Parallel to more easily set up ssh sessions (for issuing commands and sending files) to many servers concurrently. I started down the path of using Parallel::ForkManager to do the Net::OpenSSH sessions but that was pretty cumbersome. Net::OpenSSH::Parallel is working perfectly but for one thing:

Net::OpenSSH has some options to eliminate stuff like login banners--using master_stderr_discard and master_stdout_discard--and I want to use them with the parallel version. They don't work directly (i.e., they generate an error when I try to use them with Net::OpenSSH::Parallel). I'm hoping that, since it is based on Net::OpenSSH, there may be a way to set them in Net::OpenSSH::Parallel.

Is that do-able and, if not, any recommendations?

Thanks very much. Rick.

Replies are listed 'Best First'.
Re: Net::OpenSSH::Parallel Options
by atcroft (Abbot) on Mar 25, 2022 at 22:08 UTC

    Are you trying to add them in the Net::OpenSSH::Parallel constructor (my $pssh = Net::OpenSSH::Parallel->new()) call? If so, take a look at the section on the 'add_host' method--specifically, it says, "[A]ny additional option will be passed verbatim to the Net::OpenSSH constructor later." So I suspect the following *MIGHT* work (*UNTESTED*): 

        my $pssh = Net::OpenSSH::Parallel->new();
    $pssh->add_host($_, 
                    master_stderr_discard => 1, 
                    master_stdout_discard => 1, ) for @hosts;

    [download]

    Hope that helps.

[reply]
[d/l]

      Wow! Thank you SO much! Don't know how I missed that. I guess that, since the options are passed on the constructor to Net::OpenSSH, I *assumed* (always a bad idea) that it would be the same here.

      It works great!
[reply]
Re: Net::OpenSSH::Parallel Options
by etj (Priest) on Apr 04, 2022 at 14:06 UTC
    In the spirit of using the best tool for the job, have you considered using Ansible for this task?
[reply]

      I'm not convinced that Ansible is ready for production use yet. The best tool for the job might be Rex, however.

      🦛

[reply]

        I think they're referring to ansible which is a rather widely used configuration management product (supported by RedHat), not a random CPAN module that happens to have the same name . . .

        Edit: community version docs.

        The cake is a lie.
        The cake is a lie.
        The cake is a lie.

[reply]
[reply]
        Is that the FUD it looks like?
[reply]

Back to Seekers of Perl Wisdom