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           rodolico | 
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           #!/usr/bin/env perl
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           use warnings;
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           use strict;
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           rodolico | 
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           # Description: Processes Xen Clients
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           rodolico | 
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           rodolico | 
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           our $VERSION = '1.1';
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           rodolico | 
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           # Looks at various Xen parameters, mainly which DOMU's are running on it
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           # Written by RWR, 20160911
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           BEGIN {
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              push @INC, shift;
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           }
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           use library;
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           # category we will use for all values found
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           # see sysinfo for a list of valid categories
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           my $CATEGORY = 'xen';
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           # run the commands necessary to do whatever you want to do
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           # The library entered above has some helper routines
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           # validCommandOnSystem -- passed a name, returns the fully qualified path or
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           # '' if it does not exist
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           # cleanUp - passed a delimiter and a string, does the following (delimiter
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           # can be '')
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           #           chomps the string (removes trailing newlines)
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           #           removes all text BEFORE the delimiter, the delimiter, and any
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           # whitespace
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           #           thus, the string 'xxI Am x  a weird string' with a newline will
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           # become
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           #           'a weird string' with no newline
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           # now, return the tab delimited output (to STDOUT). $CATEGORY is the first
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           # item, name as recognized by sysinfo is the second and the value is
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           # the last one. For multiple entries, place on separate lines (ie, newline
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           # separated)
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           my $xl = &validCommandOnSystem( 'xl' );
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           exit 1 unless $xl;
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           $xl .= ' list';
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           sub parseOutput {
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              my $output = shift;
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              my @lines = split( "\n", $output );
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              my %domu;
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              return ( 'noname' ) unless $lines[0] =~ m/^Name/;
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              return ( 'baddomu') unless $lines[1] =~ m/^Domain-0/;
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              for ( my $i = 2; $i < @lines; $i++ ) {
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                 my ( $name,$id,$mem,$vcpu,$state,$time) = split( /\s+/, $lines[$i] );
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                 $domu{$name}{'id'} = $id;
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                 $domu{$name}{'memory'} = $mem;
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                 $domu{$name}{'numcpu'} = $vcpu;
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              }
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              return \%domu;
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           }
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           my $output = `$xl`;
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           my $hier = &parseOutput( $output );
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           foreach my $domu ( sort keys %$hier ) {
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              my $temp = $$hier{$domu};
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              foreach my $key ( sort keys %$temp ) {
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                 print "$CATEGORY\tvirtual\t$domu\t$key\t$$temp{$key}\n";
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              }
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           } # foreach
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           # if you have not done an exit state above (1 indicating no data), do one
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           # here (exit 0 indicates success)
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           # NOTE: you can bail early with exit 1 if you can not process anything
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           # because it is the wrong system or something
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           exit 0;
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