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package VZ; |
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use Exporter 'import'; |
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our @EXPORT = qw( |
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check_root |
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ip2hostname |
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hostname2ip |
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vzlist_configs |
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vzctl |
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|
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$vz_root |
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$vz_conf |
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); |
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|
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use warnings; |
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use strict; |
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|
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use Socket; |
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|
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our $vz_root = '/vz'; |
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our $vz_conf = '/etc/vz/conf'; |
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|
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=head1 NAME |
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|
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VZ - helper functions for VZ tools |
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|
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=cut |
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|
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=head1 FUNCTIONS |
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|
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=head2 check_root |
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|
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Restart as C<root> user if needed using C<sudo> |
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|
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=cut |
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|
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sub check_root { |
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if ( $> != 0 ) { |
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warn "WARNING: restarting as root using sudo\n"; |
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exec 'sudo', $0, @ARGV; |
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} |
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} |
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|
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=head2 hostname2ip |
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|
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my $ip = hostname2ip('www.example.com'); |
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|
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=cut |
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|
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sub hostname2ip { |
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my $hostname = shift || return; |
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|
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my @addresses = gethostbyname($hostname) |
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or die "Can't resolve $hostname: $!\n"; |
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@addresses = map { inet_ntoa($_) } @addresses[4 .. $#addresses]; |
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return shift @addresses; |
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} |
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|
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=head2 ip2hostname |
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|
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my $hostname = ip2hostname('192.168.0.1'); |
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|
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=cut |
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|
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sub ip2hostname { |
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my $ip = shift || return; |
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|
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return gethostbyaddr(inet_aton($ip), AF_INET) |
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or die "Can't look up $ip: $!\n"; |
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} |
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|
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=head2 vzlist_configs |
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|
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my @VEIDs = vzlist_configs; |
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|
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=cut |
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|
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sub vzlist_configs { |
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my @c; |
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open( my $cfgs, 'find /etc/vz/conf -maxdepth 1 -name "*.conf" |' ) || die "can't run find: $!"; |
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while(<$cfgs>) { |
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chomp; |
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if ( m#^.+/(\d+)\.conf$# ) { |
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if ( -d "$vz_root/private/$1" ) { |
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push @c, $1; |
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} else { |
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warn "WARNING: have config for $1 but no private directory\n"; |
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} |
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} else { |
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warn "SKIPPED: $_\n"; |
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} |
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} |
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return @c; |
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} |
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|
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=head2 vzctl |
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|
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vzctl('set','--something',42); |
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|
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=cut |
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|
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sub vzctl { |
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my @args = @_; |
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warn "## vzctl ", join(" ",@args), "\n"; |
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system('vzctl',@args) == 0 or die "vzctl @args failed: $?" |
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} |
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|
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1; |