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Re^4: Generic Broadcast SSH Launcher

by QM (Parson)
on Nov 19, 2013 at 11:02 UTC ( #1063310=note: print w/replies, xml ) Need Help??

in reply to Re^3: Generic Broadcast SSH Launcher
in thread Generic Broadcast SSH Launcher

I've come back to this now, and tried N:O:P. It makes it very simple, here's the core of the script:
for my $host (@hosts) { $pssh->add_host($host, user => $user); } $pssh->push('*', 'command', { stderr_to_stdout => 1 }, $cmd ); $pssh->run;

My next problem is that I want to decorate the return from each host, to tell them apart. Perhaps something like this:

%) -c uptime kermit fozzy kermit) 10:49:37 up 3 days, 21:38, 0 users, load average: 1.00, 1.0 +1, 1.05 fozzy) 10:49:37 up 6 days, 21:08, 0 users, load average: 1.00, 1.0 +1, 1.05

I'm not sure how I would extend N:O:P to do this. Probably have to go back into N:O.

See my OP for an update, as I had a D'oh moment, and realized it was that easy.

Quantum Mechanics: The dreams stuff is made of

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Re^5: Generic Broadcast SSH Launcher
by salva (Abbot) on Nov 19, 2013 at 11:31 UTC
    A pipe can be attached to the output stream:
    $pssh->push('*', 'command', { stderr_to_stdout => 1, stdout_file => ['|-', 'perl', '-ne', 'pr +int "%HOST%$_\n"'] }, $cmd );
    Or the more efficient:
    require POSIX; my %fh; for my $host (@hosts) { my $pid = open my $fh, '|-'; if (not $pid) { while (<>) { print "$host) $_"; } POSIX::_exit(0); } $fh{$host} = $fh; $pssh->add_host($host, default_stderr_fh => $fh, default_stdout_fh = +> $fh); } $pssh->push('*', 'command', $cmd ); $pssh->run; close $_ for values %fh;
    Note that lines comming from stderr and stdout may arrive intermixed. A more correct solution would be to use different filters for stderr and stdout.

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