xcat-core/xCAT-UI/xcat/plugins/webportal.pm

# IBM(c) 2011 EPL license http://www.eclipse.org/legal/epl-v10.html
#-------------------------------------------------------

=head 1

    xCAT plugin to handle xCAT UI service portal commands

=cut

#-------------------------------------------------------

package xCAT_plugin::webportal;
use strict;
require xCAT::Utils;
require xCAT::MsgUtils;
require xCAT::zvmUtils;
require xCAT::DBobjUtils;
require IO::Socket::INET;
use Getopt::Long;
use Data::Dumper;
use xCAT::Table;
use xCAT::NodeRange;
use XML::Simple;
require XML::Parser;

sub handled_commands {

# In order for this to work, you need to run: ln -s /opt/xcat/bin/xcatclientnnr /opt/xcat/bin/webportal
# xcatclientnnr allows command to run without a node range
    return { webportal => "webportal" };
}

sub process_request {
    my $request         = shift;
    my $callback        = shift;
    my $sub_req         = shift;
    my %authorized_cmds = (
        'lszvm'       => \&lszvm,
        'provzlinux'  => \&provzlinux,
        'clonezlinux' => \&clonezlinux,
        'genhostip'   => \&genhostip,
        'getmaxvm'    => \&getmaxvm,
        'getuserprivilege' => \&getuserprivilege,
        'lsgoldenimages' => \&lsgoldenimages
    );

    # Check if the request is authorized
    split ' ', $request->{arg}->[0];
    my $cmd = $_[0];
    if ( grep { $_ eq $cmd } keys %authorized_cmds ) {
        my $func = $authorized_cmds{$cmd};
        $func->( $request, $callback, $sub_req );
    }
    else {
        $callback->(
            { error => "$cmd is not authorized!\n", errorcode => [1] } );
    }
}

sub println {
    my $callback = shift;
    my $msg      = shift;
    my %rsp;
    push @{ $rsp{info} }, $msg;
    xCAT::MsgUtils->message( 'I', \%rsp, $callback );
    return;
}

sub lszvm {
    my ( $request, $callback, $sub_req ) = @_;

    # List the zVM and their respective HCP
    my $out = "";
    my %pair;

    # Look in 'zvm' table
    my $tab = xCAT::Table->new( 'zvm', -create => 1, -autocommit => 0 );
    my @results = $tab->getAllAttribsWhere( "nodetype='vm'", 'hcp', 'parent' );
    foreach (@results) {
        if ( $_->{'hcp'} && $_->{'parent'} && !$pair{ $_->{'hcp'} } ) {

            # Save zVM:HCP pairing
            $pair{ $_->{'hcp'} } = $_->{'parent'};

            # Print out zVM:HCP
            $out .= $_->{'parent'} . ":" . $_->{'hcp'} . "\n";
        }
    }

    $callback->( { data => $out } );
}

sub provzlinux {
    my ( $request, $callback, $sub_req ) = @_;

    my $group = $request->{arg}->[1];
    my $hcp   = $request->{arg}->[2];
    my $img   = $request->{arg}->[3];
    my $owner = $request->{arg}->[4];
    
    # Exit if missing inputs
    if ( !$group || !$hcp || !$img || !$owner ) {
        println( $callback, '(Error) Missing group, HCP, image, or owner' );
        return;
    }
    
    # Check the max # of virtual machines allowed
    my $out = `tabdump nodetype -w nodetype.comments=~"owner:$owner"`;
    my @tmp = split( /\n/, $out );
    my $usrVM = scalar(@tmp) - 1;
    
    $out = `webportal getmaxvm $owner`;
    $out =~ s/Max allowed: //g;
    my $maxVM = int($out);
    
    # Do not continue if the max # is reached
    if ($usrVM >= $maxVM) {
        println( $callback, "You have reached the maximum number of virtual machines allowed ($maxVM). Delete unused virtual machines or contact your system administrator request more virtual machines.");
        return;
    }

    # Get node OS base
    my $profile;
    my $arch;
    my $os;
    ( $profile, $arch, $os ) = getosimagedef( $callback, $img );
    if ( $os =~ m/sp/i ) {
        @tmp = split( /sp/, $os );
    } else {
        @tmp = split( /\./, $os );
    }
    my $os_base = $tmp[0];
    
    # Read in default disk pool and disk size /opt/zhcp/conf/default.conf on zHCP
    #    pool = POOL3
    #    eckd_size = 10016
    my $disk_pool;
    my $eckd_size;
    my $fba_size;
    my $default_conf   = "/var/opt/xcat/profiles/$profile.conf";
    my $default_direct = "/var/opt/xcat/profiles/$profile.direct";

    # Check if a group based directory entry exists, else use default one
    if ( !(`test -e /var/opt/xcat/profiles/$profile.direct && echo Exists`) ) {
        println( $callback, "$profile.direct does not exist.  Using default.direct to generate directory entry." );
        
        # Exit if default.direct does not exist
        $default_direct = '/var/opt/xcat/profiles/default.direct';    
        if ( !(`test -e /var/opt/xcat/profiles/default.direct && echo Exists`) ) {
            println( $callback, '(Error) $default_direct does not exists' );
            return;
        }
    }

    # Exit if default.conf does not exist
    if ( !(`test -e $default_conf && echo Exists`) ) {
        println( $callback, '(Error) $default_conf does not exists' );
        return;
    }

    # Exit if default.direct does not exist
    if ( !(`test -e $default_direct && echo Exists`) ) {
        println( $callback, '(Error) $default_direct does not exists' );
        return;
    }

    $out = `cat $default_conf`;
    @tmp = split( /\n/, $out );
    # default.conf should contain:
    
    # Configuration for virtual machines
    #    default_diskpool=POOL3
    #    default_eckd_size=10016
    my $profile_diskpool_parm = $profile . "_diskpool";
    my $profile_eckd_size_parm = $profile . "_eckd_size";
    my $profile_fba_size_parm = $profile . "_fba_size";
    my $default_disk_pool;
    my $default_eckd_size;
    my $default_fba_size;
    foreach (@tmp) {        
        # Get profile disk pool (default)
        if ( $_ =~ m/$profile_diskpool_parm=/i ) {
            $disk_pool = $_;
            $disk_pool =~ s/$profile_diskpool_parm=//g;
        }
        # Get profile disk size (default)
        elsif ( $_ =~ m/$profile_eckd_size_parm=/i ) {
            $eckd_size = $_;
            $eckd_size =~ s/$profile_eckd_size_parm=//g;
        }
        elsif ( $_ =~ m/$profile_fba_size_parm=/i ) {
            $fba_size = $_;
            $fba_size =~ s/$profile_fba_size_parm=//g;
        }
    }
    
    # Use default configuration if profile configuration does not exist
    if (!$disk_pool && (!$eckd_size || !$fba_size)) {
        println( $callback, "(Error) $profile configuration for disk pool and size does not exist" );
        return;
    }

    my $site_tab    = xCAT::Table->new('site');
    my $hash        = $site_tab->getAttribs( { key => "installdir" }, 'value' );
    my $install_dir = $hash->{'value'};

    # Get autoyast/kickstart template
    # Count the number of disks needed
    my $tmpl;
    if ( $os =~ m/sles/i ) {
        $tmpl = "$install_dir/custom/install/sles/$profile.$os_base.$arch.tmpl";
    } elsif ( $os =~ m/rhel/i ) {
        $tmpl = "$install_dir/custom/install/rh/$profile.$os_base.$arch.tmpl";
    }

    # Create VM
    # e.g. webportal provzlinux [group] [hcp] [image]
    # my ($node, $ip, $base_digit) = gennodename( $callback, $group );
    my ($node, $ip, $hostname) = findfreenode( $callback, $group );
    if (!$node) {
        println( $callback, "Unable to find a free node, IP, and hostname for $group from the IP pool" );
        return;
    }
        
    my $userid = $node;

    # Set node definitions
    # Also put node into all group
    if ($group eq 'all') {
        $out = `mkdef -t node -o $node userid=$userid hcp=$hcp mgt=zvm groups=$group`;
    } else {
        # Put node in all group
        $out = `mkdef -t node -o $node userid=$userid hcp=$hcp mgt=zvm groups=$group,all`;
    }    
    println( $callback, "$out" );
    
    # Set nodetype definitions
    $out = `chtab node=$node hosts.ip=$ip hosts.hostnames=$hostname noderes.netboot=zvm nodetype.nodetype=osi nodetype.provmethod=install nodetype.os=$os nodetype.arch=$arch nodetype.profile=$profile nodetype.comments="owner:$owner"`;

    # Create user directory entry replacing LXUSR with user ID
    # Use /opt/zhcp/conf/default.direct on zHCP as the template
    #    USER LXUSR PSWD 512M 1G G
    #    INCLUDE LNXDFLT
    #    COMMAND SET VSWITCH VSW2 GRANT LXUSR
    $out = `sed $default_direct -e s/LXUSR/$userid/g > /tmp/$node-direct.txt`;
    $out = `mkvm $node /tmp/$node-direct.txt`;
    `rm -rf /tmp/$node-direct.txt`;
    println( $callback, "$out" );
    if ( $out =~ m/Error/i ) {
        return;
    }

    # Add MDISKs to user directory entry
    # Use /opt/zhcp/conf/default.conf on zHCP to determine disk pool and disk size
    #    pool = POOL3
    #    eckd_size = 10016

    my $type;
    my $virt_addr;
    if ( $os =~ m/sles/i ) {
        # Create XML object
        my $xml = new XML::Simple;
    
        # Read XML file
        my $data = $xml->XMLin($tmpl);
        
        my $devices_ref = $data->{'dasd'}->{'devices'}->{'listentry'};
        my @devices;
        
        if (ref($devices_ref) eq 'HASH') {
        	# In the case of 1 device in the listentry, push hash into array
        	push(@devices, $devices_ref);
        } else {
        	# Listentry is an array reference
        	@devices = @$devices_ref;
        }
        
        foreach (@devices) {
            # Get disk virtual address and disk type
            $type = $_->{'drivers'}->{'listentry'}->{'modules'}->{'module_entry'}->{'listentry'};
            $virt_addr = $_->{'sysfs_bus_id'};
            $virt_addr =~ s/0\.0\.//g;
            foreach (@$type) {
                # Add ECKD disk
                if ( $_ =~ m/dasd_eckd_mod/i ) {
                    $out = `chvm $node --add3390 $disk_pool $virt_addr $eckd_size MR`;
                    println( $callback, "$out" );
                    if ( $out =~ m/Error/i ) {
                        return;
                    }
                }
    
                # Add FBA disk
                elsif ( $_ =~ m/dasd_fba_mod/i ) {
                    # To be continued
                    # $out = `chvm $node --add9336 $disk_pool $virt_addr $fba_size MR`;
                }
            }
        }    # End of foreach
    } elsif ( $os =~ m/rhel/i ) {
        my %devices;
        my $dev;
        $virt_addr = 100;
        
        # Read in kickstart file
        $out = `cat $tmpl | egrep "part /"`;
        @tmp = split( /\n/, $out );
        foreach (@tmp) {
            $out = substr( $out, index( $out, '--ondisk=' )+9 );    
            $out =~ s/\s*$//;    # Trim right
            $out =~ s/^\s*//;    # Trim left
            $devices{$out} = 1;
        }
        
        # Add ECKD disk for each device found
        for $dev ( keys %devices ) {
            $out = `chvm $node --add3390 $disk_pool $virt_addr $eckd_size MR`;
            println( $callback, "$out" );
            if ( $out =~ m/Error/i ) {
                return;
            }
            
            # Increment virtual address
            $virt_addr = $virt_addr + 1;
        }
    }
    
    # Update hosts table and DNS
    `makehosts`;
    `makedns`;

    # Update DHCP
    `makedhcp -a`;

    # Toggle node power so COMMAND SET will get executed
    `rpower $node on`;
    `rpower $node off`;

    # Punch kernel, initrd, and ramdisk to node reader
    $out = `nodeset $node install`;
    println( $callback, "$out" );
    if ( $out =~ m/Error/i ) {
        return;
    }

    # IPL reader and begin installation
    $out = `rnetboot $node ipl=00C`;
    println( $callback, "$out" );
    if ( $out =~ m/Error/i ) {
        return;
    }
    
    # Configure Ganglia monitoring
    $out = `moncfg gangliamon $node -r`;
    
    # Show node information, e.g. IP, hostname, and root password
    $out = `lsdef $node -i ip,hostnames | egrep "ip=|hostnames="`;
    my $rootpw = getsysrootpw();
    println( $callback, "Your virtual machine is ready. It may take a few minutes before you can logon using VNC ($node:1). Below is your VM attributes." );
    println( $callback, "$out" );
    println( $callback, "    rootpw = $rootpw" );
}

sub getsysrootpw {
    # Get the default root password for all xCAT provisioned VM
    my ( $callback ) = @_;
    
    my $tab    = xCAT::Table->new('passwd');
    my $hash   = $tab->getAttribs( { key => "system" }, 'password' );
    my $passwd = $hash->{'password'};
    
    return $passwd;
}

sub getosimagedef {

    # Get osimage definitions based on image name
    my ( $callback, $img_name ) = @_;

    my $profile;
    my $arch;
    my $os;

    # Get profile, osarch, and osver in 'osimage' table based on imagename
    my $tab = xCAT::Table->new( 'osimage', -create => 1, -autocommit => 0 );
    my @results = $tab->getAllAttribsWhere( "imagename='" . $img_name . "'",
        'profile', 'osarch', 'osvers' );
    foreach (@results) {

        # It should return: |gpok(\d+)|10.1.100.($1+0)|
        $profile = $_->{'profile'};
        $arch    = $_->{'osarch'};
        $os      = $_->{'osvers'};
    }

    return ( $profile, $arch, $os );
}

sub gennodename {

    # Generate node name based on given group
    my ( $callback, $group ) = @_;

    # Only use the 1st group
    if ($group =~ m/,/) {
        my @groups = split(',', $group);
        $group = @groups[0];
    }    
    
    # Hostname and IP address regular expressions
    my $hostname_regex;
    my $ipaddr_regex;
    
    my @comments;
    my $base_digit = 0;
    my $base_hostname;
    my $base_ipaddr;
    
    # Network, submask, submask prefix, and host ranges
    my $network = "";
    my $mask;
    my $prefix;
    my $hosts_count;
    my $range_low = 1;
    my $range_high = 254;
    
     # Hostname and IP address generated
    my $hostname;
    my $ipaddr;
    my $tmp;
    
    my @args;

    # Get regular expression for hostname in 'hosts' table
    my $tab = xCAT::Table->new( 'hosts', -create => 1, -autocommit => 0 );
    my @results = $tab->getAllAttribsWhere( "node='" . $group . "'", 'ip', 'comments' );
    foreach (@results) {

        # It should return: |gpok(\d+)|10.1.100.($1+0)|        
        @args = split( /\|/, $_->{'ip'} );
        $hostname_regex = $args[1];
        $ipaddr_regex = $args[2];
        
        $base_hostname = $args[1];        
        $base_hostname =~ s/\(\S*\)/#/g;
        
        # Get the 10.1.100.
        $base_ipaddr = $args[2];
        $base_ipaddr =~ s/\(\S*\)//g;
        
        # Get the ($1+0)
        $ipaddr_regex =~ s/$base_ipaddr//g;
        
        # Get the network within comments
        # It should return: "description: All machines; network: 10.1.100.0/24;"
        # This will help determine the 1st node in the group if none exists
        @comments = split( /|/, $_->{'comments'} );
        foreach (@comments) {
            if ($_ =~ m/network:/i) {
                $network = $_;
                
                # Remove network header
                $network =~ s/network://g;
                
                # Trim network section
                $network =~ s/\s*$//;
                $network =~ s/^\s*//;

                # Extract network
                $tmp = rindex($network, '/');
                if ($tmp > -1) {
                    # Get submask prefix
                    $prefix = substr($network, $tmp);
                    $prefix =~ s|/||g;
                    
                    # Get the number of hosts possible using submask
                    $hosts_count = 32 - int($prefix);
                    # Minus network and broadcast addresses
                    $hosts_count = 2 ** $hosts_count - 2;
                    
                    # Get network
                    $network = substr($network, 0, $tmp);
                }
                
                # Extract base digit, which depends on the netmask used
                $base_digit = substr($network, rindex($network, '.') + 1);
                # 1st number in range is network
                $range_low = $base_digit + 1;
                
                # Get hosts range
                if ($tmp > -1) {
                    $range_high = $base_digit + $hosts_count;
                }
            }
        } # End of foreach
    } # End of foreach
    
    # Generate hostname
    $hostname = $base_hostname;
    $hostname =~ s/#/$base_digit/g;
    
    # Generate IP address
    $ipaddr = $hostname;
    $ipaddr =~ s/$hostname_regex/$ipaddr_regex/gee;
    $ipaddr = $base_ipaddr . $ipaddr;
    
    # Get networks in 'networks' table
    $tab = xCAT::Table->new( 'networks', -create => 1, -autocommit => 0 );
    my $entries = $tab->getAllEntries();

    # Go through each network
    my $iprange;
    foreach (@$entries) {

        # Get network, mask, and range
        $network = $_->{'net'};
        $mask = $_->{'mask'};
        $iprange = $_->{'dynamicrange'};
            
        # If the host IP address is in this subnet, return
        if (xCAT::NetworkUtils->ishostinsubnet($ipaddr, $mask, $network)) {

            # Exit loop
            last;
        } else {
            $network = "";
        }
    }
    
    # Exit if no network exist for group
    if (!$network) {
        return;
    }
    
    # Find the network range for this group based on networks table
    my @ranges;
    if ($iprange) {
        @args = split( /;/, $iprange );
        foreach (@args) {
            # If a network range exists
            if ($_ =~ m/-/) {
                @ranges = split( /-/, $_ );
                $range_low = $ranges[0];                
                $range_high = $ranges[1];
                
                # Get the low and high ends digit
                $range_low =~ s/$base_ipaddr//g;
                $range_high =~ s/$base_ipaddr//g;
            }
        }
    } # End of if ($iprange)
    
    # If no nodes exist in group
    # Set the base digit to the low end of the network range
    if ($range_low && $base_digit == 1) {
        $base_digit = $range_low;
        
        # Generate hostname
        $hostname = $base_hostname;
        $hostname =~ s/#/$base_digit/g;
        
        # Generate IP address
        $ipaddr = $hostname;
        $ipaddr =~ s/$hostname_regex/$ipaddr_regex/gee;
        $ipaddr = $base_ipaddr . $ipaddr;
    }
                
    # Check xCAT tables, /etc/hosts, and ping to see if hostname is already used
    while (`nodels $hostname` || `cat /etc/hosts | grep "$ipaddr "` || !(`ping -c 4 $ipaddr` =~ m/100% packet loss/)) {        
        # Base digit invalid if over 254
        if ($base_digit > $range_high) {
            last;
        }
        
        # +1 to base digit to obtain next hostname
        $base_digit = $base_digit + 1;
        
        $hostname = $base_hostname;
        $hostname =~ s/#/$base_digit/g;
        
        $ipaddr = $hostname;
        $ipaddr =~ s/$hostname_regex/$ipaddr_regex/gee;
        $ipaddr = $base_ipaddr . $ipaddr;
    }
        
    # Range must be within network range
    if ($base_digit > $range_high) {
        return;
    } else {
        return ($hostname, $ipaddr, $base_digit);
    }
}

sub clonezlinux {
    my ( $request, $callback, $sub_req ) = @_;

    # webportal clonezlinux [src node] [group] [owner]
    my $src_node = $request->{arg}->[1];
    my $group = $request->{arg}->[2];
    my $owner = $request->{arg}->[3];
    
    # Check the max # of virtual machines allowed
    my $out = `tabdump nodetype -w nodetype.comments=~"owner:$owner"`;
    my @tmp = split( /\n/, $out );
    my $usrVM = scalar(@tmp) - 1;
    
    $out = `webportal getmaxvm $owner`;
    $out =~ s/Max allowed: //g;
    my $maxVM = int($out);
    
    # Do not continue if the max # is reached
    if ($usrVM >= $maxVM) {
        println( $callback, "You have reached the maximum number of virtual machines allowed ($maxVM). Delete unused virtual machines or contact your system administrator request more virtual machines.");
        return;
    }

    # Get source node's HCP
    my $props = xCAT::zvmUtils->getNodeProps( 'zvm', $src_node, ('hcp') );
    my $hcp = $props->{'hcp'};
    
    # Get source node's nodetype
    $props = xCAT::zvmUtils->getNodeProps( 'nodetype', $src_node, ('os', 'arch', 'profile') );
    my $os = $props->{'os'};
    my $arch = $props->{'arch'};
    my $profile = $props->{'profile'};

    # Read in default disk pool from /var/opt/xcat/profiles/default.conf on xCAT MN
    #    pool = POOL3
    #    eckd_size = 10016
    my $disk_pool;
    my $default_conf   = '/var/opt/xcat/profiles/default.conf';
    my $default_direct = '/var/opt/xcat/profiles/default.direct';

    # Exit if default.conf does not exist
    if ( !(`test -e $default_conf && echo Exists`) ) {
        println( $callback, '(Error) $default_conf does not exists' );
        return;
    }

    # Exit if default.direct does not exist
    if ( !(`test -e $default_direct && echo Exists`) ) {
        println( $callback, '(Error) $default_direct does not exists' );
        return;
    }

    $out = `cat $default_conf`;
    @tmp = split( /\n/, $out );
    # default.conf should contain:
    
    # Default configuration for virtual machines handled by this zHCP
    #    default_diskpool=POOL3
    #    compute_diskpool=POOL3
    my $profile_diskpool_parm = '';
    if ($profile) {
        $profile_diskpool_parm = $profile . "_diskpool";
    }
    
    foreach (@tmp) {
        # Get disk pool (default)
        if ( $_ =~ m/default_diskpool=/i ) {
            $disk_pool = $_;
            $disk_pool =~ s/default_diskpool=//g;
        }
        
        # Get profile disk pool (default)
        elsif ( $_ =~ m/$profile_diskpool_parm=/i && $profile_diskpool_parm) {
            $disk_pool = $_;
            $disk_pool =~ s/$profile_diskpool_parm=//g;
        }
    }
    
    # Trim disk pool of white space
    $disk_pool =~ s/\s*$//;    # Trim right
    $disk_pool =~ s/^\s*//;    # Trim left
        
    # Create VM
    # e.g. webportal provzlinux [group] [hcp] [image]
    # my ($node, $ip, $base_digit) = gennodename( $callback, $group );
    my ($node, $ip, $hostname) = findfreenode( $callback, $group );
    if (!$node) {
    	println( $callback, "Unable to find a free node, IP, and hostname for $group from the IP pool" );
        return;	
    }
    
    my $userid = $node;
        
    # Set node definitions
    $out = `mkdef -t node -o $node userid=$userid hcp=$hcp mgt=zvm groups=$group`;
    println( $callback, "$out" );

    # Set nodetype definitions
    $out = `chtab node=$node hosts.ip=$ip hosts.hostnames=$hostname noderes.netboot=zvm nodetype.nodetype=osi nodetype.provmethod=install nodetype.os=$os nodetype.arch=$arch nodetype.profile=$profile nodetype.comments="owner:$owner"`;

    # Update hosts table and DNS
    sleep(5); # Time needed to update /etc/hosts
    `makehosts`;
    `makedns`;

    # Update DHCP
    `makedhcp -a`;
    println( $callback, "hosts table, DHCP, and DNS updated" );

    # Clone virtual machine    
    sleep(5); # Time needed to update /etc/hosts
    $out = `mkvm $node $src_node pool=$disk_pool`;
    println( $callback, "$out" );
    if ( $out =~ m/Error/i || $out =~ m/Failed/i ) {
        return;
    }
    
    # Configure Ganglia monitoring
    $out = `moncfg gangliamon $node -r`;
    
    # Show node information, e.g. IP, hostname, and root password
    $out = `lsdef $node | egrep "ip=|hostnames="`;
    my $rootpw = getsysrootpw();
    println( $callback, "Your virtual machine is ready. It may take a few minutes before you can logon. Below is your VM attributes." );
    println( $callback, "$out" );
    println( $callback, "    rootpw = Same as source node" );
}

sub genhostip {
    my ( $request, $callback, $sub_req ) = @_;
    my $group = $request->{arg}->[1];
    
    # my ($node, $ip, $base_digit) = gennodename( $callback, $group );
    my ($node, $ip, $hostname) = findfreenode( $callback, $group );
    println( $callback, "$node: $ip, $hostname" );
}

sub getmaxvm {
    my ( $request, $callback, $sub_req ) = @_;
    my $user = $request->{arg}->[1];
    
    my @args;
    my $max;
    
    # Look in 'policy' table
    my $tab = xCAT::Table->new( 'policy', -create => 1, -autocommit => 0 );
    my @results = $tab->getAllAttribsWhere( "name='" . $user . "'", 'comments' );
    foreach (@results) {
        if ( $_->{'comments'} ) {
            @args = split( ';', $_->{'comments'} );
            
            # Extract max VM
            foreach (@args) {
                if ($_ =~ m/max-vm:/i) {
                    $_ =~ s/max-vm://g;
                    $max = $_;
                    last;
                }
            }
        }
    }
    
    $callback->( { data => "Max allowed: $max" } );
}

sub getuserprivilege {
    # Get the user privilege
    my ( $request, $callback, $sub_req ) = @_;
    my $user = $request->{arg}->[1];
    if (!$user) {
        $callback->( { data => "(Error) No user name is specified" } );
        return;
    }
    
    my @args;
    my $privilege = "user";
    
    # Look in 'policy' table
    my $tab = xCAT::Table->new( 'policy', -create => 1, -autocommit => 0 );
    my @results = $tab->getAllAttribsWhere( "name='" . $user . "'", 'comments' );
    foreach (@results) {
        if ( $_->{'comments'} ) {
            @args = split( ';', $_->{'comments'} );
            
            # Extract user privilege
            foreach (@args) {
                if ($_ =~ m/privilege:/i) {
                    $_ =~ s/privilege://g;
                    $privilege = $_;                    
                    $privilege =~ s/\s*$//;    # Trim right
                    $privilege =~ s/^\s*//;    # Trim left
                    last;
                }
            }
        }
    }
    
    $callback->( { data => "Privilege: $privilege" } );
}

sub lsgoldenimages {
    my ( $request, $callback, $sub_req ) = @_;
    
    # Find the golden image that can be cloned by searching nodetype table for nodetype.provmethod=clone
    my $clones = "";
    my $comments = "";
    my $description = "";
    my @args;
    
    # Look in 'policy' table
    my $tab = xCAT::Table->new( 'nodetype', -create => 1, -autocommit => 0 );
    my @results = $tab->getAllAttribsWhere( "provmethod='clone'", 'node', 'comments' );
    foreach (@results) {
        if ($_->{'node'}) {
        	$clones .= $_->{'node'} . ": ";
        	
        	$comments = $_->{'comments'};
        	@args = split(';', $comments);
        	foreach (@args) {
        		if ($_ =~ m/description:/i) {
        			$description = $_;
        			$description =~ s/description://g;
        			$description =~ s/\s*$//;    # Trim right
                    $description =~ s/^\s*//;    # Trim left
        		} else {
        			$description = "No comments";
        		}
        	}
        	
        	$clones .= $description . ",";
        }
    }
    
    # Delete last comma
    $clones = substr($clones, 0, -1);
        
    $callback->( { data => $clones } );
}

sub findfreenode {
	# Generate node name based on given group
	my ( $callback, $group ) = @_;
    
    # IP pool contained in /var/opt/xcat/ippool where a file exists per group
    if ( !(`test -e /var/opt/xcat/ippool/$group.pool && echo Exists`) ) {
        return;
    }
    
    # IP pool group format: node, IP, hostname
    # It would look similar to:
    #   ihost10,10.1.136.10,ihost10.endicott.ibm.com
    #   ihost11,10.1.136.11,ihost11.endicott.ibm.com
    #   ihost12,10.1.136.12,ihost12.endicott.ibm.com
    my $node;
    my $ipaddr;
    my $hostname;
    
    my $out = `cat /var/opt/xcat/ippool/$group.pool | sed 1d`;
    my @entries = split( /\n/, $out );
    if (@entries < 1) {
    	return;
    }
    
    my $found = 0;
    foreach(@entries) {
    	# Grab the 1st free entry found
    	($node, $ipaddr, $hostname) = split(/,/, $_);
    	if ($node && $ipaddr && $hostname) {
    		
    		# Check against xCAT tables, /etc/hosts, and ping to see if hostname is already used
		    if (`nodels $node` || `cat /etc/hosts | grep "$ipaddr "` || !(`ping -c 4 $ipaddr` =~ m/100% packet loss/)) {        
		        next;
		    } else {
		    	$found = 1;
		    	return ($node, $ipaddr, $hostname);
		    }
    	}
    }

    return;
}
1;