I am trying to figure out how to execute multiple sudo cmds with parallel ssh. I have manage successfully to create multiple sequential ssh requests and capture the output.

I tried to follow the instructions at Net::OpenSSH::Parallel @ FAQ - Frequently Asked Questions. I am doing something wrong but I can not figure out where I am going so wrong.

Important Notice In order to make the script to work you need to save all the ssh keys to the host that the script will be executed. "~/.ssh/known_hosts"

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]

Update: Removing unnecessary code adding minimum needed code:

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 $timeout = 20;
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);
    
    foreach my $hash ( @mps ) {
    $pssh->add_host( $ini{$hash}{host} ,
             user   => $ini{$hash}{user},
             port   => $ini{$hash}{port},
             passwd => $ini{$hash}{psw} );
    
    $sudo_passwords{$ini{$hash}{host}} = $ini{$hash}{psw};
    }

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

    sub sudo {
    my ($label, $ssh, @cmd) = @_;
    $ssh->system({stdin_data => "$sudo_passwords{$label}\n"},
             'sudo', '-Skp', '', '--', @cmd);
    }

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

    #$pssh->push( '*' , command => 'ls' , '/home/username/Downloads' )
+;

    $pssh->run;

    return %ini;

} # end sub complex

my %results = devices();

[download]

Output Update: I am getting this error when executing the code above.

Enter Password: Enter Password: sudoerssudoers: sudo service ntp stop:
+ command not found
Request rejected by Privilege Manager
: sudo service ntp stop: command not found
Request rejected by Privilege Manager

[download]

Update: 2 Script works but how to capture output?

Thanks to i5513 I manage to make it work correctly, but I am having difficulties on capturing and redirecting the desired output. I am trying to capture the time slew and store it with the host as hash ref.

Sample of solution code:

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 ( $_ !~ /ntpd$/ );
        }
}

[download]

Has anybody similar problem and possible solution?

Thank you in advance for your time and effort.

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

In reply to Net::OpenSSH::Parallel with sudo commands by thanos1983

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