Dear Monks,

This question is a sequence of Net::OpenSSH::Parallel with sudo commands. Although that the question has been answered I am facing a new problem that I can not overcome.

The script is operating perfectly, it adds the registered hosts and applies the set of commands. The problem is that I can not figure out how to capture and process the STDOUT.

I have found a way to capture the output and paste it into a file. I am trying to process the output before pasting it on the file. I want to process the output into a hash according to the device that is executing the code.

Sample of current output:

 * Stopping NTP server ntpd
   ...done.
 * Stopping NTP server ntpd
   ...done.
ntpd: time slew +0.000740s
ntpd: time slew +0.013857s
 * Starting NTP server ntpd
 * Starting NTP server ntpd
   ...done.
   ...done.

[download]

The desired output would be something like:

IP1 => {ntpd: time slew +0.000740s}
IP2 => {ntpd: time slew +0.013857s}

[download]

Sample of conf.ini file.

[MP 101]
host     = 127.0.0.1
user     = username
psw      = password
port     = 22

[MP 100]
host     = 127.0.0.1
user     = username
psw      = password
port     = 22

[download]

Sample of code with successful parallel ssh connections with sudo multiple commands.

#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use Fcntl qw(:flock);
use Config::IniFiles;
use Net::OpenSSH::Parallel;

select STDOUT; $| = 1;
select STDERR; $| = 1;

my %dev_data = ();
my %sudo_passwords = ();

sub devices {

    my $path = 'conf.ini';
    
    open my $fh , '<' , "".$path."" 
    or die "Could not open file: ".$path." - $!\n";

    flock( $fh , LOCK_SH )
    or die "Could not lock '".$fh."' - $!\n";

    tie my %ini, 'Config::IniFiles', ( -file => "".$path."" )
    or die "Error: IniFiles->new: @Config::IniFiles::errors";

    close ( $fh )
    or die "Could not close '".$fh."' - $!\n";

    my @mps = keys ( %ini );

    my $maximum_workers = @mps;
    my $maximum_connections = 2 * $maximum_workers;
    my $maximum_reconnections = 3;

    my %opts = ( workers       => $maximum_workers,
         connections   => $maximum_connections,
         reconnections => $maximum_reconnections );

    my $pssh = Net::OpenSSH::Parallel->new(%opts);
    #open my $stdout_fh, '>>', 'test.log' or die $!;

    foreach my $hash ( @mps ) {
    $pssh->add_host( $ini{$hash}{host} ,
             user     => $ini{$hash}{user},
             port     => $ini{$hash}{port},
             password => $ini{$hash}{psw} );
             #default_stdout_fh => $stdout_fh );
    
    $sudo_passwords{$ini{$hash}{host}} = $ini{$hash}{psw};
    }

    my @cmd = ( "service ntp stop" ,
        "ntpd -gq" ,
        "service ntp start" );

    sub sudo {
        my ($label, $ssh, @cmd) = @_;
        foreach my $c (@cmd) {
        $ssh->system( {stdin_data => "$sudo_passwords{$label}\n"} ,
              'sudo' , '-Skp' , '' , '--' , split " " , $c );
        ( $dev_data{$label} = $_ ) if ( $_ !~ /slew/ );
        }
    }

    $pssh->push('*', parsub => \&sudo, @cmd);

    $pssh->run;

    #print Dumper(\%dev_data);

    return %dev_data;

} # end sub complex

my %results = devices();

[download]

Does anybody know how to do that?

Seeking for Perl wisdom...on the process of learning...not there...yet!

In reply to How to capture process and redirect STDOUT in a hash by thanos1983

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