Ravada.pm 62.1 KB
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package Ravada;

use warnings;
use strict;

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our $VERSION = '0.3.0';
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use Carp qw(carp croak);
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use Data::Dumper;
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use DBIx::Connector;
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use File::Copy;
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use Hash::Util qw(lock_hash);
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use Moose;
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use POSIX qw(WNOHANG);
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use YAML;

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use Socket qw( inet_aton inet_ntoa );

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no warnings "experimental::signatures";
use feature qw(signatures);

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use Ravada::Auth;
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use Ravada::Request;
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use Ravada::VM::Void;
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our %VALID_VM;
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our %ERROR_VM;
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eval {
    require Ravada::VM::KVM and do {
        Ravada::VM::KVM->import;
    };
    $VALID_VM{KVM} = 1;
};
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$ERROR_VM{KVM} = $@;

eval {
    require Ravada::VM::Void and do {
        Ravada::VM::Void->import;
    };
    $VALID_VM{Void} = 1;
};
$ERROR_VM{Void} = $@;
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no warnings "experimental::signatures";
use feature qw(signatures);

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=head1 NAME

Ravada - Remove Virtual Desktop Manager

=head1 SYNOPSIS

  use Ravada;

  my $ravada = Ravada->new()

=cut

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our $FILE_CONFIG = "/etc/ravada.conf";
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$FILE_CONFIG = undef if ! -e $FILE_CONFIG;
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###########################################################################

our $CONNECTOR;
our $CONFIG = {};
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our $DEBUG;
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our $CAN_FORK = 1;
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our $CAN_LXC = 0;
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# Seconds to wait for other long process
our $SECONDS_WAIT_CHILDREN = 2;
# Limit for long processes
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our $LIMIT_PROCESS = 2;
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our $LIMIT_HUGE_PROCESS = 1;

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our $DIR_SQL = "sql/mysql";
$DIR_SQL = "/usr/share/doc/ravada/sql/mysql" if ! -e $DIR_SQL;
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# LONG commands take long
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our %HUGE_COMMAND = map { $_ => 1 } qw(download);
our %LONG_COMMAND =  map { $_ => 1 } (qw(prepare_base remove_base screenshot ), keys %HUGE_COMMAND);
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our $USER_DAEMON;
our $USER_DAEMON_NAME = 'daemon';

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has 'vm' => (
          is => 'ro'
        ,isa => 'ArrayRef'
       ,lazy => 1
     , builder => '_create_vm'
);

has 'connector' => (
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        is => 'rw'
);

has 'config' => (
    is => 'ro'
    ,isa => 'Str'
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);

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has 'warn_error' => (
    is => 'rw'
    ,isa => 'Bool'
    ,default => sub { 1 }
);

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=head2 BUILD

Internal constructor

=cut


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sub BUILD {
    my $self = shift;
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    if ($self->config()) {
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        _init_config($self->config);
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    } else {
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        _init_config($FILE_CONFIG) if $FILE_CONFIG && -e $FILE_CONFIG;
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    }
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    if ( $self->connector ) {
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        $CONNECTOR = $self->connector
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    } else {
        $CONNECTOR = $self->_connect_dbh();
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        $self->connector($CONNECTOR);
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    }
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    Ravada::Auth::init($CONFIG);
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    $self->_create_tables();
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    $self->_upgrade_tables();
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    $self->_init_user_daemon();
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    $self->_update_data();
}

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sub _init_user_daemon {
    my $self = shift;
    return if $USER_DAEMON;

    $USER_DAEMON = Ravada::Auth::SQL->new(name => $USER_DAEMON_NAME);
    if (!$USER_DAEMON->id) {
        $USER_DAEMON = Ravada::Auth::SQL::add_user(
            name => $USER_DAEMON_NAME,
            is_admin => 1
        );
        $USER_DAEMON = Ravada::Auth::SQL->new(name => $USER_DAEMON_NAME);
    }

}
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sub _update_user_grants {
    my $self = shift;
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    $self->_init_user_daemon();
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    my $sth = $CONNECTOR->dbh->prepare("SELECT id FROM users");
    my $id;
    $sth->execute;
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    $sth->bind_columns(\$id);
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    while ($sth->fetch) {
        my $user = Ravada::Auth::SQL->search_by_id($id);
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        next if $user->name() eq $USER_DAEMON_NAME;

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        next if $user->grants();
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        $USER_DAEMON->grant_user_permissions($user);
        $USER_DAEMON->grant_admin_permissions($user)    if $user->is_admin;
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    }
    $sth->finish;
}

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sub _update_isos {
    my $self = shift;
    my $table = 'iso_images';
    my $field = 'name';
    my %data = (
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        mate_artful => {
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                    name => 'Ubuntu Mate Artful'
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            ,description => 'Ubuntu Mate 17.10.1 (Artful) 64 bits'
                   ,arch => 'amd64'
                    ,xml => 'yakkety64-amd64.xml'
             ,xml_volume => 'yakkety64-volume.xml'
                    ,url => 'http://cdimage.ubuntu.com/ubuntu-mate/releases/17.10.*/release/ubuntu-mate-17.10.*-desktop-amd64.iso'
                ,md5_url => '$url/MD5SUMS'
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                ,min_disk_size => '10'
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        },
        mate_xenial => {
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                    name => 'Ubuntu Mate Xenial'
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            ,description => 'Ubuntu Mate 16.04.3 (Xenial) 64 bits'
                   ,arch => 'amd64'
                    ,xml => 'yakkety64-amd64.xml'
             ,xml_volume => 'yakkety64-volume.xml'
                    ,url => 'http://cdimage.ubuntu.com/ubuntu-mate/releases/16.04.*/release/ubuntu-mate-16.04.*-desktop-amd64.iso'
                ,md5_url => '$url/MD5SUMS'
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                ,min_disk_size => '10'
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        },
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        alpine_37 => {
                    name => 'Alpine 3.7'
            ,description => 'Alpine Linux 3.7 64 bits ( Minimal Linux Distribution)'
                   ,arch => 'amd64'
                    ,xml => 'yakkety64-amd64.xml'
             ,xml_volume => 'yakkety64-volume.xml'
                    ,url => 'http://dl-cdn.alpinelinux.org/alpine/v3.7/releases/x86_64/'
                ,file_re => 'alpine-virt-3.7.\d+-x86_64.iso'
                ,sha256_url => 'http://dl-cdn.alpinelinux.org/alpine/v3.7/releases/x86_64/alpine-virt-3.7.0-x86_64.iso.sha256'
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                ,min_disk_size => '10'
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        }
        ,artful => {
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                    name => 'Ubuntu Artful Aardvark'
            ,description => 'Ubuntu 17.10 Artful Aardvark 64 bits'
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                   ,arch => 'amd64'
                    ,xml => 'yakkety64-amd64.xml'
             ,xml_volume => 'yakkety64-volume.xml'
                    ,url => 'http://releases.ubuntu.com/17.10/'
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                ,file_re => 'ubuntu-17.10.*desktop-amd64.iso'
                ,md5_url => '$url/MD5SUMS'
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          ,min_disk_size => '10'
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        }
        ,zesty => {
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                    name => 'Ubuntu Zesty Zapus'
            ,description => 'Ubuntu 17.04 Zesty Zapus 64 bits'
                   ,arch => 'amd64'
                    ,xml => 'yakkety64-amd64.xml'
             ,xml_volume => 'yakkety64-volume.xml'
                    ,url => 'http://releases.ubuntu.com/17.04/'
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                ,file_re => 'ubuntu-17.04.*desktop-amd64.iso'
                ,md5_url => 'http://releases.ubuntu.com/17.04/MD5SUMS'
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                ,min_disk_size => '10'
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        }
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        ,serena64 => {
            name => 'Mint 18.1 Mate 64 bits'
    ,description => 'Mint Serena 18.1 with Mate Desktop based on Ubuntu Xenial 64 bits'
           ,arch => 'amd64'
            ,xml => 'xenial64-amd64.xml'
     ,xml_volume => 'xenial64-volume.xml'
            ,url => 'http://mirrors.evowise.com/linuxmint/stable/18.1/'
        ,file_re => 'linuxmint-18.1-mate-64bit.iso'
        ,md5_url => ''
            ,md5 => 'c5cf5c5d568e2dfeaf705cfa82996d93'
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            ,min_disk_size => '10'
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        }
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        ,fedora => {
            name => 'Fedora 25'
            ,description => 'RedHat Fedora 25 Workstation 64 bits'
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            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/25/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-25-.*\.iso'
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            ,arch => 'amd64'
            ,xml => 'xenial64-amd64.xml'
            ,xml_volume => 'xenial64-volume.xml'
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            ,sha256_url => '$url/Fedora-Workstation-25-.*-x86_64-CHECKSUM'
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            ,min_disk_size => '10'
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        }
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        ,fedora_26 => {
            name => 'Fedora 26'
            ,description => 'RedHat Fedora 26 Workstation 64 bits'
            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/26/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-26-.*\.iso'
            ,arch => 'amd64'
            ,xml => 'xenial64-amd64.xml'
            ,xml_volume => 'xenial64-volume.xml'
            ,sha256_url => 'http://fedora.mirrors.ovh.net/linux/releases/26/Workstation/x86_64/iso/Fedora-Workstation-26-.*-x86_64-CHECKSUM'
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            ,min_disk_size => '10'
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        }
        ,fedora_27 => {
            name => 'Fedora 27'
            ,description => 'RedHat Fedora 27 Workstation 64 bits'
            ,url => 'http://ftp.halifax.rwth-aachen.de/fedora/linux/releases/27/Workstation/x86_64/iso/Fedora-Workstation-netinst-x86_64-27-.*\.iso'
            ,arch => 'amd64'
            ,xml => 'xenial64-amd64.xml'
            ,xml_volume => 'xenial64-volume.xml'
            ,sha256_url => 'http://fedora.mirrors.ovh.net/linux/releases/27/Workstation/x86_64/iso/Fedora-Workstation-27-.*-x86_64-CHECKSUM'
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            ,min_disk_size => '10'
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        }
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        ,xubuntu_artful => {
            name => 'Xubuntu Artful Aardvark'
            ,description => 'Xubuntu 17.10 Artful Aardvark 64 bits'
            ,arch => 'amd64'
            ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
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            ,md5_url => '$url/../MD5SUMS'
            ,url => 'http://archive.ubuntu.com/ubuntu/dists/artful/main/installer-amd64/current/images/netboot/'
            ,file_re => 'mini.iso'
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            ,rename_file => 'xubuntu_artful.iso'
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            ,min_disk_size => '10'
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        }
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        ,xubuntu_zesty => {
            name => 'Xubuntu Zesty Zapus'
            ,description => 'Xubuntu 17.04 Zesty Zapus 64 bits'
            ,arch => 'amd64'
            ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
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            ,md5_url => '$url/../MD5SUMS'
            ,url => 'http://archive.ubuntu.com/ubuntu/dists/zesty/main/installer-amd64/current/images/netboot'
            ,file_re => 'mini.iso'
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            ,rename_file => 'xubuntu_zesty_mini.iso'
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            ,min_disk_size => '10'
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        }
        ,xubuntu_xenial => {
            name => 'Xubuntu Xenial Xerus'
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            ,description => 'Xubuntu 16.04 Xenial Xerus 64 bits (LTS)'
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            ,url => 'http://archive.ubuntu.com/ubuntu/dists/xenial/main/installer-amd64/current/images/netboot/mini.iso'
           ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
            ,md5 => 'fe495d34188a9568c8d166efc5898d22'
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            ,rename_file => 'xubuntu_xenial_mini.iso'
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            ,min_disk_size => '10'
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        }
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       ,lubuntu_aardvark => {
            name => 'Lubuntu Artful Aardvark'
            ,description => 'Lubuntu 17.10 Artful Aardvark 64 bits'
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            ,url => 'http://cdimage.ubuntu.com/lubuntu/releases/17.10.*/release/lubuntu-17.10.*-desktop-amd64.iso'
            ,md5_url => '$url/MD5SUMS'
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            ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
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            ,min_disk_size => '10'
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        }
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        ,lubuntu_xenial => {
            name => 'Lubuntu Xenial Xerus'
            ,description => 'Xubuntu 16.04 Xenial Xerus 64 bits (LTS)'
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            ,url => 'http://cdimage.ubuntu.com/lubuntu/releases/16.04.*/release/'
            ,file_re => 'lubuntu-16.04.*-desktop-amd64.iso'
            ,md5_url => '$url/MD5SUMS'
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            ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
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            ,min_disk_size => '10'
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        }
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        ,debian_jessie_32 => {
            name =>'Debian Jessie 32 bits'
            ,description => 'Debian 8 Jessie 32 bits'
            ,url => 'http://cdimage.debian.org/cdimage/archive/^8\..*/i386/iso-cd/'
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            ,file_re => 'debian-8.[\d\.]+-i386-xfce-CD-1.iso'
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            ,md5_url => '$url/MD5SUMS'
            ,xml => 'jessie-amd64.xml'
            ,xml_volume => 'jessie-volume.xml'
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            ,min_disk_size => '10'
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        }
        ,debian_jessie_64 => {
            name =>'Debian Jessie 64 bits'
            ,description => 'Debian 8 Jessie 64 bits'
            ,url => 'http://cdimage.debian.org/cdimage/archive/^8\..*/amd64/iso-cd/'
            ,file_re => 'debian-8.[\d\.]+-amd64-xfce-CD-1.iso'
            ,md5_url => '$url/MD5SUMS'
            ,xml => 'jessie-amd64.xml'
            ,xml_volume => 'jessie-volume.xml'
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            ,min_disk_size => '10'
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        }
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        ,debian_stretch => {
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            name =>'Debian Stretch 64 bits'
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            ,description => 'Debian 9 Stretch 64 bits (XFCE desktop)'
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            ,url => 'https://cdimage.debian.org/debian-cd/^9\..*/amd64/iso-cd/'
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            ,file_re => 'debian-9.[\d\.]+-amd64-xfce-CD-1.iso'
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            ,md5_url => '$url/MD5SUMS'
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            ,xml => 'jessie-amd64.xml'
            ,xml_volume => 'jessie-volume.xml'
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            ,min_disk_size => '10'
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        }
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        ,windows_7 => {
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          name => 'Windows 7'
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          ,description => 'Windows 7 64 bits. Requires an user provided ISO image.'
            .'<a target="_blank" href="http://ravada.readthedocs.io/en/latest/docs/new_iso_image.html">[help]</a>'
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          ,xml => 'windows_7.xml'
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          ,xml_volume => 'wisuvolume.xml'
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          ,min_disk_size => '21'
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        }
        ,windows_10 => {
          name => 'Windows 10'
          ,description => 'Windows 10 64 bits. Requires an user provided ISO image.'
          .'<a target="_blank" href="http://ravada.readthedocs.io/en/latest/docs/new_iso_image.html">[help]</a>'
          ,xml => 'windows_10.xml'
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          ,xml_volume => 'windows10-volume.xml'
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          ,min_disk_size => '21'
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        }
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        ,windows_xp => {
          name => 'Windows XP'
          ,description => 'Windows XP 64 bits. Requires an user provided ISO image.'
          .'<a target="_blank" href="http://ravada.readthedocs.io/en/latest/docs/new_iso_image.html">[help]</a>'
          ,xml => 'windows_xp.xml'
          ,xml_volume => 'wisuvolume.xml'
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          ,min_disk_size => '3'
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        }
        ,windows_12 => {
          name => 'Windows 2012'
          ,description => 'Windows 2012 64 bits. Requires an user provided ISO image.'
          .'<a target="_blank" href="http://ravada.readthedocs.io/en/latest/docs/new_iso_image.html">[help]</a>'
          ,xml => 'windows_12.xml'
          ,xml_volume => 'wisuvolume.xml'
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          ,min_disk_size => '21'
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        }
        ,windows_8 => {
          name => 'Windows 8.1'
          ,description => 'Windows 8.1 64 bits. Requires an user provided ISO image.'
          .'<a target="_blank" href="http://ravada.readthedocs.io/en/latest/docs/new_iso_image.html">[help]</a>'
          ,xml => 'windows_8.xml'
          ,xml_volume => 'wisuvolume.xml'
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          ,min_disk_size => '21'
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        }
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    );

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    $self->_update_table($table, $field, \%data);

}

sub _update_domain_drivers_types($self) {

    my $data = {
        image => {
            id => 4,
            ,name => 'image'
           ,description => 'Graphics Options'
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           ,vm => 'KVM'
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        },
        jpeg => {
            id => 5,
            ,name => 'jpeg'
           ,description => 'Graphics Options'
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           ,vm => 'KVM'
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        },
        zlib => {
            id => 6,
            ,name => 'zlib'
           ,description => 'Graphics Options'
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           ,vm => 'KVM'
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        },
        playback => {
            id => 7,
            ,name => 'playback'
           ,description => 'Graphics Options'
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           ,vm => 'KVM'
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        },
        streaming => {
            id => 8,
            ,name => 'streaming'
           ,description => 'Graphics Options'
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           ,vm => 'KVM'
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        }
    };
    $self->_update_table('domain_drivers_types','id',$data);
}

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sub _update_domain_drivers_options($self) {

    my $data = {
        qxl => {
            id => 1,
            ,id_driver_type => 1,
            ,name => 'QXL'
           ,value => 'type="qxl" ram="65536" vram="65536" vgamem="16384" heads="1" primary="yes"'
        },
        vmvga => {
            id => 2,
            ,id_driver_type => 1,
            ,name => 'VMVGA'
           ,value => 'type="vmvga" vram="16384" heads="1" primary="yes"'
        },
        cirrus => {
            id => 3,
            ,id_driver_type => 1,
            ,name => 'Cirrus'
           ,value => 'type="cirrus" vram="16384" heads="1" primary="yes"'
        },
        vga => {
            id => 4,
            ,id_driver_type => 1,
            ,name => 'VGA'
           ,value => 'type="vga" vram="16384" heads="1" primary="yes"'
        },
        ich6 => {
            id => 6,
            ,id_driver_type => 2,
            ,name => 'ich6'
           ,value => 'model="ich6"'
        },
        ac97 => {
            id => 7,
            ,id_driver_type => 2,
            ,name => 'ac97'
           ,value => 'model="ac97"'
        },
        virtio => {
            id => 8,
            ,id_driver_type => 3,
            ,name => 'virtio'
           ,value => 'type="virtio"'
        },
        e1000 => {
            id => 9,
            ,id_driver_type => 3,
            ,name => 'e1000'
           ,value => 'type="e1000"'
        },
        rtl8139 => {
            id => 10,
            ,id_driver_type => 3,
            ,name => 'rtl8139'
           ,value => 'type="rtl8139"'
        },
        auto_glz => {
            id => 11,
            ,id_driver_type => 4,
            ,name => 'auto_glz'
           ,value => 'compression="auto_glz"'
        },
        auto_lz => {
            id => 12,
            ,id_driver_type => 4,
            ,name => 'auto_lz'
           ,value => 'compression="auto_lz"'
        },
        quic => {
            id => 13,
            ,id_driver_type => 4,
            ,name => 'quic'
           ,value => 'compression="quic"'
        },
        glz => {
            id => 14,
            ,id_driver_type => 4,
            ,name => 'glz'
           ,value => 'compression="glz"'
        },
        lz => {
            id => 15,
            ,id_driver_type => 4,
            ,name => 'lz'
           ,value => 'compression="lz"'
        },
        off => {
            id => 16,
            ,id_driver_type => 4,
            ,name => 'off'
           ,value => 'compression="off"'
        },
        auto => {
            id => 17,
            ,id_driver_type => 5,
            ,name => 'auto'
           ,value => 'compression="auto"'
        },
        never => {
            id => 18,
            ,id_driver_type => 5,
            ,name => 'never'
           ,value => 'compression="never"'
        },
        always => {
            id => 19,
            ,id_driver_type => 5,
            ,name => 'always'
           ,value => 'compression="always"'
        },
        auto1 => {
            id => 20,
            ,id_driver_type => 6,
            ,name => 'auto'
           ,value => 'compression="auto"'
        },
        never1 => {
            id => 21,
            ,id_driver_type => 6,
            ,name => 'never'
           ,value => 'compression="never"'
        },
        always1 => {
            id => 22,
            ,id_driver_type => 6,
            ,name => 'always'
           ,value => 'compression="always"'
        },
        on => {
            id => 23,
            ,id_driver_type => 7,
            ,name => 'on'
           ,value => 'compression="on"'
        },
        off1 => {
            id => 24,
            ,id_driver_type => 7,
            ,name => 'off'
           ,value => 'compression="off"'
        },
        filter => {
            id => 25,
            ,id_driver_type => 8,
            ,name => 'filter'
           ,value => 'mode="filter"'
        },
        all => {
            id => 26,
            ,id_driver_type => 8,
            ,name => 'all'
           ,value => 'mode="all"'
        },
        off2 => {
            id => 27,
            ,id_driver_type => 8,
            ,name => 'off'
           ,value => 'mode="off"'
        }
    };
    $self->_update_table('domain_drivers_options','id',$data);
}

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sub _update_table($self, $table, $field, $data) {

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    my $sth_search = $CONNECTOR->dbh->prepare("SELECT id FROM $table WHERE $field = ?");
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    for my $name (keys %$data) {
        my $row = $data->{$name};
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        $sth_search->execute($row->{$field});
        my ($id) = $sth_search->fetchrow;
        next if $id;
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        warn("INFO: updating $table : $row->{$field}\n")    if $0 !~ /\.t$/;
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        my $sql =
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            "INSERT INTO $table "
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            ."("
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            .join(" , ", sort keys %{$data->{$name}})
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            .")"
            ." VALUES ( "
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            .join(" , ", map { "?" } keys %{$data->{$name}})
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            ." )"
        ;
        my $sth = $CONNECTOR->dbh->prepare($sql);
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        $sth->execute(map { $data->{$name}->{$_} } sort keys %{$data->{$name}});
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        $sth->finish;
    }
}

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sub _remove_old_isos {
    my $self = shift;
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    for my $sql (
        "DELETE FROM iso_images "
            ."  WHERE url like '%debian-9.0%iso'"
        ,"DELETE FROM iso_images"
            ."  WHERE name like 'Debian%' "
            ."      AND NOT url  like '%*%' "
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        ,"DELETE FROM iso_images "
            ."  WHERE name like 'Lubuntu Artful%'"
            ."      AND url NOT LIKE '%*%' "
        ,"DELETE FROM iso_images "
            ."  WHERE name like 'Lubuntu Zesty%'"

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    ) {
        my $sth = $CONNECTOR->dbh->prepare($sql);
        $sth->execute();
        $sth->finish;
    }
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}

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sub _update_data {
    my $self = shift;
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    $self->_remove_old_isos();
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    $self->_update_isos();
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    $self->_update_user_grants();
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    $self->_update_domain_drivers_types();
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    $self->_update_domain_drivers_options();
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    $self->_update_old_qemus();
}

sub _update_old_qemus($self) {
    my $sth = $CONNECTOR->dbh->prepare("UPDATE vms SET vm_type='KVM'"
        ." WHERE vm_type='qemu' AND name ='KVM_localhost'"
    );
    $sth->execute;

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}

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sub _set_url_isos($self, $new_url='http://localhost/iso/') {
    $new_url .= '/' if $new_url !~ m{/$};
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    my $sth = $CONNECTOR->dbh->prepare(
        "SELECT id,url FROM iso_images "
        ."WHERE url is NOT NULL"
    );
    my $sth_update = $CONNECTOR->dbh->prepare(
        "UPDATE iso_images set url=? WHERE id=?"
    );
    $sth->execute();
    while ( my ($id, $url) = $sth->fetchrow) {
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        $url =~ s{\w+://(.*?)/(.*)}{$new_url$2};
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        $sth_update->execute($url, $id);
    }
    $sth->finish;

}
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sub _upgrade_table {
    my $self = shift;
    my ($table, $field, $definition) = @_;
    my $dbh = $CONNECTOR->dbh;

    my $sth = $dbh->column_info(undef,undef,$table,$field);
    my $row = $sth->fetchrow_hashref;
    $sth->finish;
    return if $row;

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    warn "INFO: adding $field $definition to $table\n"  if $0 !~ /\.t$/;
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    $dbh->do("alter table $table add $field $definition");
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    return 1;
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}

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sub _remove_field {
    my $self = shift;
    my ($table, $field ) = @_;

    my $dbh = $CONNECTOR->dbh;
    return if $CONNECTOR->dbh->{Driver}{Name} !~ /mysql/i;

    my $sth = $dbh->column_info(undef,undef,$table,$field);
    my $row = $sth->fetchrow_hashref;
    $sth->finish;
    return if !$row;

    warn "INFO: removing $field to $table\n"  if $0 !~ /\.t$/;
    $dbh->do("alter table $table drop column $field");
    return 1;

}

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sub _create_table {
    my $self = shift;
    my $table = shift;

    my $sth = $CONNECTOR->dbh->table_info('%',undef,$table,'TABLE');
    my $info = $sth->fetchrow_hashref();
    $sth->finish;
    return if keys %$info;

    warn "INFO: creating table $table\n";
    my $file_sql = "$DIR_SQL/$table.sql";
    open my $in,'<',$file_sql or die "$! $file_sql";
    my $sql = join " ",<$in>;
    close $in;

    $CONNECTOR->dbh->do($sql);
    return 1;
}

sub _insert_data {
    my $self = shift;
    my $table = shift;

    my $file_sql =  "$DIR_SQL/../data/insert_$table.sql";
    return if ! -e $file_sql;

    warn "INFO: inserting data for $table\n";
    open my $in,'<',$file_sql or die "$! $file_sql";
    my $sql = '';
    while (my $line = <$in>) {
        $sql .= $line;
        next if $sql !~ /\w/ || $sql !~ /;\s*$/;
        $CONNECTOR->dbh->do($sql);
        $sql = '';
    }
    close $in;

}

sub _create_tables {
    my $self = shift;
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#    return if $CONNECTOR->dbh->{Driver}{Name} !~ /mysql/i;

    my $driver = lc($CONNECTOR->dbh->{Driver}{Name});
    $DIR_SQL =~ s{(.*)/.*}{$1/$driver};
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    opendir my $ls,$DIR_SQL or die "$! $DIR_SQL";
    while (my $file = readdir $ls) {
        my ($table) = $file =~ m{(.*)\.sql$};
        next if !$table;
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        next if $table =~ /^insert/;
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        $self->_insert_data($table)     if $self->_create_table($table);
    }
    closedir $ls;
}

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sub _clean_iso_mini {
    my $sth = $CONNECTOR->dbh->prepare("DELETE FROM iso_images WHERE device like ?");
    $sth->execute('%/mini.iso');
    $sth->finish;
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    $sth = $CONNECTOR->dbh->prepare("DELETE FROM iso_images WHERE url like ? AND rename_file = NULL");
    $sth->execute('%/mini.iso');
    $sth->finish;
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}

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sub _upgrade_tables {
    my $self = shift;
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#    return if $CONNECTOR->dbh->{Driver}{Name} !~ /mysql/i;
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    $self->_upgrade_table('file_base_images','target','varchar(64) DEFAULT NULL');
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    $self->_upgrade_table('vms','vm_type',"char(20) NOT NULL DEFAULT 'KVM'");
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    $self->_upgrade_table('vms','connection_args',"text DEFAULT NULL");

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    $self->_upgrade_table('requests','at_time','int(11) DEFAULT NULL');
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    $self->_upgrade_table('iso_images','rename_file','varchar(80) DEFAULT NULL');
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    $self->_clean_iso_mini();
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    $self->_upgrade_table('iso_images','md5_url','varchar(255)');
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    $self->_upgrade_table('iso_images','sha256','varchar(255)');
    $self->_upgrade_table('iso_images','sha256_url','varchar(255)');
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    $self->_upgrade_table('iso_images','file_re','char(64)');
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    $self->_upgrade_table('iso_images','device','varchar(255)');
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    $self->_upgrade_table('iso_images','min_disk_size','int (11) DEFAULT NULL');
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    $self->_upgrade_table('users','language','char(3) DEFAULT NULL');
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    if ( $self->_upgrade_table('users','is_external','int(11) DEFAULT 0')) {
        my $sth = $CONNECTOR->dbh->prepare(
            "UPDATE users set is_external=1 WHERE password='*LK* no pss'"
        );
        $sth->execute;
    }
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    $self->_upgrade_table('networks','requires_password','int(11)');
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    $self->_upgrade_table('networks','n_order','int(11) not null default 0');

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    $self->_upgrade_table('domains','spice_password','varchar(20) DEFAULT NULL');
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    $self->_upgrade_table('domains','description','text DEFAULT NULL');
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    $self->_upgrade_table('domains','run_timeout','int DEFAULT NULL');
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    $self->_upgrade_table('domains','start_time','int DEFAULT 0');
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    $self->_upgrade_table('domains','is_volatile','int NOT NULL DEFAULT 0');
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    $self->_upgrade_table('domains','autostart','int NOT NULL DEFAULT 0');
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    $self->_upgrade_table('domains','status','varchar(32) DEFAULT "shutdown"');
    $self->_upgrade_table('domains','display','varchar(128) DEFAULT NULL');
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    $self->_upgrade_table('domains','info','varchar(255) DEFAULT NULL');
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    $self->_upgrade_table('domains','internal_id','varchar(64) DEFAULT NULL');
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    $self->_upgrade_table('domains','id_vm','int default null');
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    $self->_upgrade_table('domains_network','allowed','int not null default 1');
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}

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sub _connect_dbh {
    my $driver= ($CONFIG->{db}->{driver} or 'mysql');;
    my $db_user = ($CONFIG->{db}->{user} or getpwnam($>));;
    my $db_pass = ($CONFIG->{db}->{password} or undef);
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    my $db = ( $CONFIG->{db}->{db} or 'ravada' );
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    my $host = $CONFIG->{db}->{host};

    my $data_source = "DBI:$driver:$db";
    $data_source = "DBI:$driver:database=$db;host=$host"    
        if $host && $host ne 'localhost';

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    my $con;
    for my $try ( 1 .. 10 ) {
        eval { $con = DBIx::Connector->new($data_source
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                        ,$db_user,$db_pass,{RaiseError => 1
                        , PrintError=> 0 });
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            $con->dbh();
        };
        return $con if $con && !$@;
        sleep 1;
        warn "Try $try $@\n";
    }
    die ($@ or "Can't connect to $driver $db at $host");
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}

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=head2 display_ip
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Returns the default display IP read from the config file
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=cut
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sub display_ip {
    my $ip = $CONFIG->{display_ip};
    return $ip if $ip;
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}

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=head2 nat_ip

Returns the IP for NATed environments

=cut

sub nat_ip {
    return $CONFIG->{nat_ip} if exists $CONFIG->{nat_ip};
}

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sub _init_config {
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    my $file = shift or confess "ERROR: Missing config file";
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    my $connector = shift;
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    confess "Deprecated connector" if $connector;
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    die "ERROR: Missing config file $file\n"
        if !-e $file;

    eval { $CONFIG = YAML::LoadFile($file) };

    die "ERROR: Format error in config file $file\n$@"  if $@;

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    $CONFIG->{vm} = [] if !$CONFIG->{vm};
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    $LIMIT_PROCESS = $CONFIG->{limit_process} 
        if $CONFIG->{limit_process} && $CONFIG->{limit_process}>1;
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#    $CONNECTOR = ( $connector or _connect_dbh());
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    _init_config_vm();
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}

sub _init_config_vm {
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    for my $vm ( @{$CONFIG->{vm}} ) {
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        warn "$vm not available in this system.\n".($ERROR_VM{$vm})
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            if !$VALID_VM{$vm} && $0 !~ /\.t$/;
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    }
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    delete $VALID_VM{Void}
        if !grep /^Void$/,@{$CONFIG->{vm}};

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    @Ravada::Front::VM_TYPES = keys %VALID_VM;
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}

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sub _create_vm_kvm {
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    my $self = shift;
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    die "KVM not installed" if !$VALID_VM{KVM};
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    my $cmd_qemu_img = `which qemu-img`;
    chomp $cmd_qemu_img;

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    die "ERROR: Missing qemu-img" if !$cmd_qemu_img;
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    my $vm_kvm;
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    $vm_kvm = Ravada::VM::KVM->new( );
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    my ($internal_vm , $storage);
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    $storage = $vm_kvm->dir_img();
    $internal_vm = $vm_kvm->vm;
    $vm_kvm = undef if !$internal_vm || !$storage;

    return $vm_kvm;
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}

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=head2 disconnect_vm

Disconnect all the Virtual Managers connections.

=cut


sub disconnect_vm {
    my $self = shift;
    $self->_disconnect_vm();
}

sub _disconnect_vm{
    my $self = shift;
    return $self->_connect_vm(0);
}

sub _connect_vm {
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    my $self = shift;
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    my $connect = shift;
    $connect = 1 if !defined $connect;

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    my @vms;
    eval { @vms = $self->vm };
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    warn $@ if $@ && $self->warn_error;
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    return if $@ && $@ =~ /No VMs found/i;
    die $@ if $@;

    return if !scalar @vms;
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    for my $n ( 0 .. $#{$self->vm}) {
        my $vm = $self->vm->[$n];
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        if (!$connect) {
            $vm->disconnect();
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        } else {
            $vm->connect();
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        }
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    }
}

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sub _create_vm_lxc {
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    my $self = shift;

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    return Ravada::VM::LXC->new( connector => ( $self->connector or $CONNECTOR ));
}
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sub _create_vm_void {
    my $self = shift;
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    return Ravada::VM::Void->new( connector => ( $self->connector or $CONNECTOR ));
}
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sub _create_vm {
    my $self = shift;
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    # TODO: add a _create_vm_default for VMs that just are created with ->new
    #       like Void or LXC
    my %create = (
        'KVM' => \&_create_vm_kvm
        ,'LXC' => \&_create_vm_lxc
        ,'Void' => \&_create_vm_void
    );

    my @vms = ();
    my $err;
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