Ravada.pm 48.1 KB
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package Ravada;

use warnings;
use strict;

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our $VERSION = '0.2.9-rc2';
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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 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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        $self->_init_config($self->config);
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    } else {
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        $self->_init_config($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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        $USER_DAEMON->grant_user_permissions($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 = (
        zesty => {
                    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/'
                ,file_re => ,'ubuntu-17.04.*desktop-amd64.iso'
                ,md5_url => ,'http://releases.ubuntu.com/17.04/MD5SUMS'
        }
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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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        ,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'
            ,sha256_url => 'http://fedora.mirrors.ovh.net/linux/releases/25/Workstation/x86_64/iso/Fedora-Workstation-25-.*-x86_64-CHECKSUM'
        }
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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 => 'http://archive.ubuntu.com/ubuntu/dists/zesty/main/installer-amd64/current/images/MD5SUMS'
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            ,url => 'http://archive.ubuntu.com/ubuntu/dists/zesty/main/installer-amd64/current/images/netboot/mini.iso'
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            ,rename_file => 'xubuntu_zesty_mini.iso'
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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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        }
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        ,lubuntu_zesty => {
            name => 'Lubuntu Zesty Zapus'
            ,description => 'Lubuntu 17.04 Zesty Zapus 64 bits'
            ,url => 'http://cdimage.ubuntu.com/lubuntu/releases/17.04/release/lubuntu-17.04-desktop-amd64.iso'
            ,md5_url => 'http://cdimage.ubuntu.com/lubuntu/releases/17.04/release/MD5SUMS'
            ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
        }
        ,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/16.04.2/release/'
            ,file_re => 'lubuntu-16.04.2-desktop-amd64.iso'
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            ,md5_url => 'http://cdimage.ubuntu.com/lubuntu/releases/16.04.2/release/MD5SUMS'
            ,xml => 'yakkety64-amd64.xml'
            ,xml_volume => 'yakkety64-volume.xml'
        }
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        ,debian_stretch => {
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            name =>'Debian Stretch 64 bits'
            ,description => 'Debian 9.0 Stretch 64 bits (XFCE desktop)'
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            ,url => 'https://cdimage.debian.org/debian-cd/9.1.0/amd64/iso-cd/'
            ,file_re => 'debian-9.[\d\.]+-amd64-xfce-CD-1.iso'
            ,md5_url => 'https://cdimage.debian.org/debian-cd/9.1.0/amd64/iso-cd/MD5SUMS'
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            ,xml => 'jessie-amd64.xml'
            ,xml_volume => 'jessie-volume.xml'
        }
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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'
        }
        ,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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        }
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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'
        }
        ,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'
        }
        ,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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    );

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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'
           ,vm => 'qemu'
        },
        jpeg => {
            id => 5,
            ,name => 'jpeg'
           ,description => 'Graphics Options'
           ,vm => 'qemu'
        },
        zlib => {
            id => 6,
            ,name => 'zlib'
           ,description => 'Graphics Options'
           ,vm => 'qemu'
        },
        playback => {
            id => 7,
            ,name => 'playback'
           ,description => 'Graphics Options'
           ,vm => 'qemu'

        },
        streaming => {
            id => 8,
            ,name => 'streaming'
           ,description => 'Graphics Options'
           ,vm => 'qemu'

        }
    };
    $self->_update_table('domain_drivers_types','id',$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;
    }
}

sub _update_data {
    my $self = shift;
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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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}

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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('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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}

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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 {
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    my $ip = $CONFIG->{display_ip};
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    return $ip if $ip;
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}

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sub _init_config {
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    my $self = shift;
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    my $file = shift;
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    my $connector = shift;
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    confess "Deprecated connector" if $connector;
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    $CONFIG = YAML::LoadFile($file);
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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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    $self->warn_error($CONFIG->{warn_error})
        if defined $CONFIG->{warn_error};
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    $self->_init_config_vm();
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}

sub _init_config_vm {
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    my $self = shift;

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    for my $vm ( @{$CONFIG->{vm}} ) {
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        warn "$vm not available in this system.\n".($ERROR_VM{$vm})
            if !$VALID_VM{$vm} && $self->warn_error();
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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( connector => ( $self->connector or $CONNECTOR ));
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    my ($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;

    for my $vm_name (keys %VALID_VM) {
        my $vm;
        eval { $vm = $create{$vm_name}->($self) };
        $err.= $@ if $@;
        push @vms,($vm) if $vm;
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    }
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    if (!@vms) {
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        warn "No VMs found: $err\n" if $self->warn_error;
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    }
    return \@vms;

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}

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sub _check_vms {
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    my $self = shift;

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    my @vm;
    eval { @vm = @{$self->vm} };
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    for my $n ( 0 .. $#vm ) {
        if ($vm[$n] && ref $vm[$n] =~ /KVM/i) {
            if (!$vm[$n]->is_alive) {
                warn "$vm[$n] dead" if $DEBUG;
                $vm[$n] = $self->_create_vm_kvm();
            }
        }
    }
}

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=head2 create_domain

Creates a new domain based on an ISO image or another domain.

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  my $domain = $ravada->create_domain(
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         name => $name
    , id_iso => 1
  );


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  my $domain = $ravada->create_domain(
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         name => $name
    , id_base => 3
  );


=cut


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sub create_domain {
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    my $self = shift;

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    my %args = @_;

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    croak "Argument id_owner required "
        if !$args{id_owner};

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    my $vm_name = $args{vm};
    delete $args{vm};
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    my $request = ( $args{request} or undef);
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    my $vm;
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    if ($vm_name) {
        $vm = $self->search_vm($vm_name);
        confess "ERROR: vm $vm_name not found"  if !$vm;
    }
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    $vm = $self->vm->[0]               if !$vm;
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    confess "No vm found"   if !$vm;

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    carp "WARNING: no VM defined, we will use ".$vm->name
        if !$vm_name;
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    confess "I can't find any vm ".Dumper($self->vm) if !$vm;
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    return $vm->create_domain(@_);
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}

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=head2 remove_domain

Removes a domain

  $ravada->remove_domain($name);

=cut

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sub remove_domain {
    my $self = shift;
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    my %arg = @_;

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    confess "Argument name required "
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        if !$arg{name};

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    confess "Argument uid required "
        if !$arg{uid};
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    lock_hash(%arg);

    my $domain = $self->search_domain($arg{name}, 1)
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        or die "ERROR: I can't find domain '$arg{name}', maybe already removed.";
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    my $user = Ravada::Auth::SQL->search_by_id( $arg{uid});
    $domain->remove( $user);
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}

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=head2 search_domain

  my $domain = $ravada->search_domain($name);

=cut

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sub search_domain {
    my $self = shift;
    my $name = shift;
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    my $import = shift;
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    my $vm = $self->search_vm('Void');
    warn "No Void VM" if !$vm;
    return if !$vm;

    my $domain = $vm->search_domain($name, $import);
    return $domain if $domain;

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

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    for my $vm (@{$self->vm}) {
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        my $domain = $vm->search_domain($name, $import);
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        next if !$domain;
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        next if !$domain->_select_domain_db && !$import;
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        my $id;
        eval { $id = $domain->id };
        # TODO import the domain in the database with an _insert_db or something
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        warn $@ if $@   && $DEBUG;
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        return $domain if $id || $import;
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    }
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    return;
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}
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=head2 search_domain_by_id
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  my $domain = $ravada->search_domain_by_id($id);

=cut

sub search_domain_by_id {
    my $self = shift;
    my $id = shift  or confess "ERROR: missing argument id";

    my $sth = $CONNECTOR->dbh->prepare("SELECT name FROM domains WHERE id=?");
    $sth->execute($id);
    my ($name) = $sth->fetchrow;
    confess "Unknown domain id=$id" if !$name;

    return $self->search_domain($name);
}
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=head2 list_vms

List all the Virtual Machine Managers

=cut

sub list_vms($self) {
    return @{$self->vm};
}

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=head2 list_domains

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List all created domains
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  my @list = $ravada->list_domains();

=cut

sub list_domains {
    my $self = shift;
    my @domains;
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    for my $vm ($self->list_vms) {
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        for my $domain ($vm->list_domains) {
            push @domains,($domain);
        }
    }
    return @domains;
}

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=head2 list_domains_data

List all domains in raw format. Return a list of id => { name , id , is_active , is_base }

   my $list = $ravada->list_domains_data();

   $c->render(json => $list);

=cut

sub list_domains_data {
    my $self = shift;
    my @domains;
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    my $sth = $CONNECTOR->dbh->prepare(
        "SELECT * FROM domains ORDER BY name"
    );
    $sth->execute;
    while (my $row = $sth->fetchrow_hashref) {
        push @domains,($row);
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    }
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    $sth->finish;
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    return \@domains;
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}

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# sub list_domains_data {
#     my $self = shift;
#     my @domains;
#     for my $domain ($self->list_domains()) {
#         eval { $domain->id };
#         warn $@ if $@;
#         next if $@;
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#         push @domains, {                id => $domain->id
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#                                     , name => $domain->name
#                                   ,is_base => $domain->is_base
#                                 ,is_active => $domain->is_active
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#                            }
#     }
#     return \@domains;
# }

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=head2 list_bases

List all base domains

  my @list = $ravada->list_domains();


=cut

sub list_bases {
    my $self = shift;
    my @domains;
    for my $vm (@{$self->vm}) {
        for my $domain ($vm->list_domains) {
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            eval { $domain->id };
            warn $@ if $@;
            next    if $@;
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            push @domains,($domain) if $domain->is_base;
        }
    }
    return @domains;
}

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=head2 list_bases_data

List information about the bases

=cut

sub list_bases_data {
    my $self = shift;
    my @data;
    for ($self->list_bases ) {
        push @data,{ id => $_->id , name => $_->name };
    }
    return \@data;
}

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=head2 list_images

List all ISO images

=cut

sub list_images {
    my $self = shift;
    my @domains;
    my $sth = $CONNECTOR->dbh->prepare(
        "SELECT * FROM iso_images ORDER BY name"
    );
    $sth->execute;
    while (my $row = $sth->fetchrow_hashref) {
        push @domains,($row);
    }
    $sth->finish;
    return @domains;
}

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=head2 list_images_data

List information about the images

=cut

sub list_images_data {
    my $self = shift;
    my @data;
    for ($self->list_images ) {
        push @data,{ id => $_->{id} , name => $_->{name} };
    }
    return \@data;
}

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=pod

sub _list_images_lxc {
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    my $self = shift;
    my @domains;
    my $sth = $CONNECTOR->dbh->prepare(
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        "SELECT * FROM lxc_templates ORDER BY name"
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    );
    $sth->execute;
    while (my $row = $sth->fetchrow_hashref) {
        push @domains,($row);
    }
    $sth->finish;
    return @domains;
}

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sub _list_images_data_lxc {
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    my $self = shift;
    my @data;
    for ($self->list_images_lxc ) {
        push @data,{ id => $_->{id} , name => $_->{name} };
    }
    return \@data;
}

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=cut
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=head2 remove_volume

  $ravada->remove_volume($file);

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=cut

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sub remove_volume {
    my $self = shift;

    my $file = shift;
    my ($name) = $file =~ m{.*/(.*)};

    my $removed = 0;
    for my $vm (@{$self->vm}) {
        my $vol = $vm->search_volume($name);
        next if !$vol;

        $vol->delete();
        $removed++;
    }
    if (!$removed && -e $file ) {
        warn "volume $file not found. removing file $file.\n";
        unlink $file or die "$! $file";
    }

}
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=head2 clean_killed_requests

Before processing requests, old killed requests must be cleaned.

=cut

sub clean_killed_requests {
    my $self = shift;
    my $sth = $CONNECTOR->dbh->prepare("SELECT id FROM requests "
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        ." WHERE status <> 'done' AND STATUS <> 'requested'"
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    );
    $sth->execute;
    while (my ($id) = $sth->fetchrow) {
        my $req = Ravada::Request->open($id);
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        $req->status("done","Killed ".$req->command." before completion");
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    }

}

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=head2 process_requests

This is run in the ravada backend. It processes the commands requested by the fronted

  $ravada->process_requests();

=cut

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sub process_requests {
    my $self = shift;
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    my $debug = shift;
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    my $dont_fork = shift;
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    my $long_commands = (shift or 0);
    my $short_commands = (shift or 0);
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    $self->_wait_pids_nohang();

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    my $sth = $CONNECTOR->dbh->prepare("SELECT id,id_domain FROM requests "
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        ." WHERE "
        ."    ( status='requested' OR status like 'retry %' OR status='waiting')"
        ."   AND ( at_time IS NULL  OR at_time = 0 OR at_time<=?) "
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        ." ORDER BY date_req"
    );
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    $sth->execute(time);

    my $debug_type = '';
    $debug_type = 'long' if $long_commands;
    $debug_type = 'short' if $short_commands || !$long_commands;
    $debug_type = 'all' if $long_commands && $short_commands;

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    while (my ($id_request,$id_domain)= $sth->fetchrow) {
        my $req = Ravada::Request->open($id_request);
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        if ( ($long_commands && 
                (!$short_commands && !$LONG_COMMAND{$req->command}))
            ||(!$long_commands && $LONG_COMMAND{$req->command})
        ) {
            warn "[$debug_type,$long_commands,$short_commands] $$ skipping request "
                .$req->command  if $DEBUG;
            next;
        }
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        next if $req->command !~ /shutdown/i
            && $self->_domain_working($id_domain, $id_request);
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        warn "[$debug_type] $$ executing request ".$req->id." ".$req->status()." "
            .$req->command
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            ." ".Dumper($req->args) if $DEBUG || $debug;
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        my ($n_retry) = $req->status() =~ /retry (\d+)/;
        $n_retry = 0 if !$n_retry;
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        my $err = $self->_execute($req, $dont_fork);
        $req->error($err)   if $err;
        if ($err && $err =~ /libvirt error code: 38/) {
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            if ( $n_retry < 3) {
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                warn $req->id." ".$req->command." to retry" if $DEBUG;
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                $req->status("retry ".++$n_retry)
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            }
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        }
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        next if !$DEBUG && !$debug;

        sleep 1;
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        warn "req ".$req->id." , command: ".$req->command." , status: ".$req->status()
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            ." , error: '".($req->error or 'NONE')."'\n"  if $DEBUG;
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    }
    $sth->finish;