for my $cmd (@{$ctxt->{commands}}) { ...

##</code><code>##

use Ops::Exec qw(ops_do_ssh_shell ops_new_context ops_new_cmd);
use Ops::Config qw(ops_get_servers);

my %servers = map { $_ => new_server($_) } ops_get_servers('foo');
my @contexts = map {ops_new_context({
      name => $servers{$_}{name},
      user => 'foo',
      host => $servers{$_}{host},
      key => $ENV{HOME} . '/.ssh/id_rsa.foo.prod',
      commands => [ ops_new_cmd({ name => 'capacity',
                                  command => 'df -k /home'}),
                    ops_new_cmd({ name => 'process_type1',
                                  command => 'ps -ef | grep process_type1 | grep -v grep | wc -l'}),
                    ops_new_cmd({ name => 'process_type2',
                                  command => 'ps -ef | grep process_type2 | grep -v grep | wc -l'})
                   ]
      })} sort keys %servers;

for my $ctxt (@contexts) {
   if ($local_state->{status} eq 'success') {
      my $ctxt_status = ops_do_ssh_shell($ctxt);
      for my $cmd_status (@{$ctxt_status->{commands}}) {
         if ( $ctxt_status->{success} ) {
            $servers{$ctxt_status->{name}}{$cmd_status->{name}} = $cmd_status->{output};
         }
         else {
            $local_state->{status} = 'failure';
            $local_state->{stack_trace} = $cmd_status;
         }
      }
   }
}

if ($local_state->{status} eq 'success') {
   for my $server (keys %servers) {
      $servers{$server}{capacity} = parse_capacity($servers{$server}{capacity});
      # further parsing and validation
   }
}

# statuses are evaluated to generate warnings and alerts
# texts and emails are sent yadda yadda

##</code><code>##

package Ops::Exec;
use strict;
use warnings;

use Exporter qw(import);
use Data::Dumper;
use Net::OpenSSH;
use Hash::Util qw(lock_ref_keys);
use Clone qw(clone);

our @EXPORT_OK = qw(ops_do_ssh_shell ops_do_ssh_qx ops_new_context ops_new_cmd ops_new_qx_cmd);

use constant SUCCESS => 1;
use constant FAILURE => 0;

sub ops_new_cmd {
   my ($init_hash) = @_;
   my $new_cmd = {};
   lock_ref_keys($new_cmd, qw(name command success output std_err cmd_ret_code cmd_ret_msg));
   $new_cmd = clone($init_hash);
   $new_cmd->{success} = SUCCESS;
   return $new_cmd
}

sub ops_new_context {
   my ($init_hash) = @_;
   my $new_cmd = {};
   lock_ref_keys($new_cmd, qw(name user host key commands success ssh_retcode ssh_retmsg outputs));
   $new_cmd = clone($init_hash);
   $new_cmd->{success} = SUCCESS;
   return $new_cmd
}

sub ops_do_ssh_shell {
   my ($ctxt) = @_;

   my $ssh;
   defined $ctxt->{key} or $ctxt->{key} = $ENV{HOME} . '/.ssh/id_rsa';

   if ( $ctxt->{success} ) {
      $ssh = Net::OpenSSH->new($ctxt->{host}, user => $ctxt->{user}, key_path => $ctxt->{key});
      if ( $ssh->error ) {
         $ctxt->{success} = FAILURE;
         ($ctxt->{ssh_retcode}, $ctxt->{ssh_retmsg}) = (0 + $ssh->error, '' . $ssh->error);
      }
   }

   for my $cmd (@{$ctxt->{commands}}) {
      if ( $ctxt->{success} ) {
         ($cmd->{output}, $cmd->{std_err}) = $ssh->capture2($cmd->{command});
         $cmd->{cmd_ret_code} = 0 + $ssh->error;
         if ( $cmd->{cmd_ret_code} ) {
            $ctxt->{success} = FAILURE;
            $ctxt->{cmd_ret_msg} = '' . $ssh->error;
         }
         chomp $cmd->{output};
         chomp $cmd->{std_err};
      }
   }

   return $ctxt;
}

sub ops_new_qx_cmd {
   my ($init_hash) = @_;
   my $new_cmd = {};
   lock_ref_keys($new_cmd, qw(name user host command success output std_err cmd_ret_code cmd_ret_msg ssh_ret_code ssh_ret_msg ssh_cmd_qx));
   %$new_cmd = %$init_hash;
   $new_cmd->{success} = SUCCESS;
   return $new_cmd
}

sub ops_do_ssh_qx {
   my ($cmd) = @_;

   $cmd->{ssh_cmd_qx} = 'ssh ' .  $cmd->{user} . '\@' . $cmd->{host} . ' \'' . $cmd->{command} . '\'' . ' 2>/dev/null';

   $cmd->{output} = qx($cmd->{ssh_cmd_qx});
   if ( defined $cmd->{output} ) {
      $cmd->{cmd_ret_code} = $?;
      chomp $cmd->{output};
   }
   else {
      ($cmd->{ssh_ret_code}, $cmd->{ssh_ret_msg}) = (0 + $!, '' . $!);
   }

   return $cmd;
}

"Red Guitar, Three Chords ...";