+$welcome
$continuelink $end_page @@ -265,7 +274,8 @@ sub handler { my $tmpinfo=Apache::lonnet::reply('tmpget:'.$form{'logtoken'}, $form{'serverid'}); - if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost')) { + if (($tmpinfo=~/^error/) || ($tmpinfo eq 'con_lost') || + ($tmpinfo eq 'no_such_host')) { &failed($r,'Information needed to verify your login information is missing, inaccessible or expired.',\%form); return OK; } else { @@ -351,7 +361,9 @@ sub handler { &Apache::lonnet::get_dom('configuration',['usercreation'],$form{'udom'}); if (grep(/^login$/,@cancreate)) { my $domdesc = &Apache::lonnet::domain($form{'udom'},'description'); - &check_can_host($r,\%form,'no_account_on_host',$domdesc); + unless (&check_can_host($r,\%form,'no_account_on_host',$domdesc)) { + return OK; + } my $start_page = &Apache::loncommon::start_page('Create a user account in LON-CAPA'); my $lonhost = $r->dir_config('lonHostID'); @@ -403,41 +415,101 @@ sub handler { } } - &check_can_host($r,\%form,$authhost); + my ($is_balancer,$otherserver) = + &Apache::lonnet::check_loadbalancing($form{'uname'},$form{'udom'}); - if ($r->dir_config("lonBalancer") eq 'yes') { - &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, - \%form); - my ($otherserver) = &choose_server($form{'udom'}); - $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); + if ($is_balancer) { + if (!$otherserver) { + ($otherserver) = &Apache::lonnet::choose_server($form{'udom'}); + } + if ($otherserver) { + &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, + \%form); + $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); + } else { + $r->print(&noswitch()); + } + return OK; } else { - &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, - \%form); + if (!&check_can_host($r,\%form,$authhost)) { + my $otherserver = &Apache::lonnet::choose_server($form{'udom'}); + if ($otherserver) { + &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect',undef, + \%form); + $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver.'&origurl='.$firsturl); + } else { + $r->print(&noswitch()); + } + return OK; + } + +# ------------------------------------------------------- Do the load balancing + +# ---------------------------------------------------------- Determine own load + my $loadlim = $r->dir_config('lonLoadLim'); + my $loadavg; + { + my $loadfile=Apache::File->new('/proc/loadavg'); + $loadavg=<$loadfile>; + } + $loadavg =~ s/\s.*//g; + my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim); + my $userloadpercent=&Apache::lonnet::userload(); + +# ---------------------------------------------------------- Are we overloaded? + if ((($userloadpercent>100.0)||($loadpercent>100.0))) { + my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent,1,$form{'udom'}); + if (!$unloaded) { + $unloaded = &Apache::lonnet::choose_server($form{'udom'}); + } + if ($unloaded) { + &success($r,$form{'uname'},$form{'udom'},$authhost,'noredirect', + undef,\%form); + $r->internal_redirect('/adm/switchserver?otherserver='.$unloaded.'&origurl='.$firsturl); + return OK; + } + } + &success($r,$form{'uname'},$form{'udom'},$authhost,$firsturl,undef, + \%form); + return OK; } - return OK; } sub check_can_host { my ($r,$form,$authhost,$domdesc) = @_; return unless (ref($form) eq 'HASH'); my $canhost = 1; - my @machinedoms = &Apache::lonnet::current_machine_domains(); + my $lonhost = $r->dir_config('lonHostID'); my $udom = $form->{'udom'}; - unless (grep(/^\Q$udom\E/,@machinedoms)) { - my $defdom = &Apache::lonnet::default_login_domain(); - my %defdomdefaults = &Apache::lonnet::get_domain_defaults($defdom); + my @intdoms; + my $internet_names = &Apache::lonnet::get_internet_names($lonhost); + if (ref($internet_names) eq 'ARRAY') { + @intdoms = @{$internet_names}; + } + my $uprimary_id = &Apache::lonnet::domain($udom,'primary'); + my $uint_dom = &Apache::lonnet::internet_dom($uprimary_id); + unless ($uint_dom ne '' && grep(/^\Q$uint_dom\E$/,@intdoms)) { + my $machine_dom = &Apache::lonnet::host_domain($lonhost); + my $hostname = &Apache::lonnet::hostname($lonhost); + my $serverhomeID = &Apache::lonnet::get_server_homeID($hostname); + my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID); + my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom); my %udomdefaults = &Apache::lonnet::get_domain_defaults($udom); my $loncaparev; if ($authhost eq 'no_account_on_host') { - $loncaparev = &Apache::lonnet::get_server_loncaparev($defdom); + $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom); } else { - $loncaparev = &Apache::lonnet::get_server_loncaparev($defdom,$authhost); + $loncaparev = &Apache::lonnet::get_server_loncaparev($machine_dom,$lonhost); } - $canhost = &Apache::lonnet::can_host_session($udom,$defdom,$loncaparev,$udomdefaults{'remotesessions'},$defdomdefaults{'hostedsessions'}); + $canhost = &Apache::lonnet::can_host_session($udom,$lonhost,$loncaparev, + $udomdefaults{'remotesessions'}, + $defdomdefaults{'hostedsessions'}); } unless ($canhost) { if ($authhost eq 'no_account_on_host') { - my ($login_host,$hostname) = &choose_server($udom); + my $checkloginvia = 1; + my ($login_host,$hostname) = + &Apache::lonnet::choose_server($udom,$checkloginvia); &Apache::loncommon::content_type($r,'text/html'); $r->send_http_header; if ($login_host ne '') { @@ -457,33 +529,23 @@ sub check_can_host { ''.&mt('Currently a LON-CAPA server is not available within the [_1] domain for you to log-in to, to create an account.',$domdesc).'
'. &Apache::loncommon::end_page()); } - return OK; } else { &success($r,$form->{'uname'},$udom,$authhost,'noredirect',undef, $form); - my ($otherserver) = &choose_server($udom); + my ($otherserver) = &Apache::lonnet::choose_server($udom); $r->internal_redirect('/adm/switchserver?otherserver='.$otherserver); } } + return $canhost; } -sub choose_server { - my ($udom) = @_; - my %domconfhash = &Apache::loncommon::get_domainconf($udom); - my %servers = &Apache::lonnet::get_servers($udom); - my $lowest_load = 30000; - my ($login_host,$hostname); - foreach my $lonhost (keys(%servers)) { - my $loginvia = $domconfhash{$udom.'.login.loginvia_'.$lonhost}; - if ($loginvia eq '') { - ($login_host, $lowest_load) = - &Apache::lonnet::compare_server_load($lonhost, $login_host, $lowest_load); - } - } - if ($login_host ne '') { - $hostname = $servers{$login_host}; - } - return ($login_host,$hostname); +sub noswitch { + my $result = &Apache::loncommon::start_page('Access to LON-CAPA unavailable'). + ''.&mt('Currently no other LON-CAPA server is available to host your session either.').'
'. + &Apache::loncommon::end_page(); + return $result; } 1;