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#!/usr/bin/env perl
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# All functions related to maniplating a specific node
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# part of havirt.
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# v0.0.1 20240602 RWR
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# Initial setup
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package node;
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our $VERSION = '0.01';
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use warnings;
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use strict;
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use Exporter;
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our @ISA = qw( Exporter );
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our @EXPORT = qw(
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&node
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);
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sub loadNodeDB {
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print "In loadNodeDB, reading $main::nodeDBName\n";
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return if $main::nodeDB;
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$main::nodeDB = &main::readDB( $main::nodeDBName );
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print "Success\n";
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}
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sub getDomainsOnNode {
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my $node = shift;
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my @nodeList = grep { /^\s*\d/ } `ssh $node 'virsh list'`;
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for ( my $i = 0; $i < @nodeList; $i++ ) {
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if ( $nodeList[$i] =~ m/\s*\d+\s*([^ ]+)/ ) {
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$nodeList[$i] = $1;
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}
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}
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my %hash = map{ $_ => time } @nodeList;
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return \%hash;
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}
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sub node {
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my $action = lc shift;
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my %conversion = (
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'CPU frequency' => 'clock',
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'CPU model' => 'cpu_model',
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'CPU socket(s)' => 'cpu_socket',
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'CPU(s)' => 'cpu_count',
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'Core(s) per socket' => 'cpu_cores',
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'Memory size' => 'memory',
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'NUMA cell(s)' => 'numa_cells',
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'Thread(s) per core' => 'threads_per_core'
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);
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print "In node, action is $action\n" if $main::DEBUG;
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my $return = '';
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&loadNodeDB();
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if ( $action eq 'update' ) { # read information for nodes and update database
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@_ = keys %$main::nodeDB if ( $_[0] eq 'ALL' );
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while ( my $nodename = shift ) {
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print "Updating $nodename\n" if $main::DEBUG;
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$return = `ssh $nodename 'virsh nodeinfo'`;
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print "Output of ssh $nodename 'virsh nodeinfo' is\n" . $return if $main::DEBUG;
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my @nodeinfo = split( "\n", $return );
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for ( my $i = 0; $i < @nodeinfo; $i++ ) {
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my ($key, $value) = split( /:\s+/, $nodeinfo[$i] );
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if ( $value =~ m/^(\d+)\s+[a-z]+$/i ) {
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$value = $1;
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}
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$key = $conversion{$key} if exists( $conversion{$key} );
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$main::nodeDB->{$nodename}->{$key} = $value;
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} # for
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} # while
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print "main::nodeDB state after update\n" . Dumper( $main::nodeDB ) if $main::DEBUG;
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&writeDB( $main::nodeDBName, $main::nodeDB );
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} elsif ( $action eq 'list' ) { # dump database as a tab separated file with headers
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my @header;
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my @data;
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foreach my $node ( sort keys %$main::nodeDB ) {
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unless ( @header ) {
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# just grab the keys for headers
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@header = sort keys %{ $main::nodeDB->{$node} };
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# put Node at the beginning
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unshift ( @header, 'Node' );
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}
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my @line;
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push @line, $node;
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foreach my $column (sort keys %{ $main::nodeDB->{$node} }) {
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push @line, $main::nodeDB->{$node}->{$column};
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}
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push (@data, \@line );
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}
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$return = &main::report_screen( \@header, \@data );
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#$return = join( "\t", @header ) . "\n";
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#$return .= join( "\n", @data ) . "\n";
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} elsif ( $action eq 'scan' ) {
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foreach my $node ( keys %$main::nodeDB ) {
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$main::nodePopulations->{$node}->{'running'} = &getDomainsOnNode( $node );
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$main::nodePopulations->{$node}->{'lastchecked'} = time;
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}
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&writeDB( $main::nodePopulationDBName,$main::nodePopulations );
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} # if..elsif
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return $return;
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}
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