version 1.64, 2004/10/05 10:10:31
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version 1.78, 2007/03/28 00:05:38
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Line 61 use LONCAPA::LondConnection;
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Line 61 use LONCAPA::LondConnection;
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use LONCAPA::LondTransaction; |
use LONCAPA::LondTransaction; |
use LONCAPA::Configuration; |
use LONCAPA::Configuration; |
use LONCAPA::HashIterator; |
use LONCAPA::HashIterator; |
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use Fcntl qw(:flock); |
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# Read the httpd configuration file to get perl variables |
# Read the httpd configuration file to get perl variables |
Line 79 my %listening_to; # Socket->host table
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Line 80 my %listening_to; # Socket->host table
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# is listening to. |
# is listening to. |
my %parent_dispatchers; # host-> listener watcher events. |
my %parent_dispatchers; # host-> listener watcher events. |
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my %parent_handlers; # Parent signal handlers... |
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my $MaxConnectionCount = 10; # Will get from config later. |
my $MaxConnectionCount = 10; # Will get from config later. |
my $ClientConnection = 0; # Uniquifier for client events. |
my $ClientConnection = 0; # Uniquifier for client events. |
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Line 87 my $NextDebugLevel= 2; # So Sigint can
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Line 90 my $NextDebugLevel= 2; # So Sigint can
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my $IdleTimeout= 600; # Wait 10 minutes before pruning connections. |
my $IdleTimeout= 600; # Wait 10 minutes before pruning connections. |
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my $LogTransactions = 0; # When True, all transactions/replies get logged. |
my $LogTransactions = 0; # When True, all transactions/replies get logged. |
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my $executable = $0; # Get the full path to me. |
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# |
# |
# The variables below are only used by the child processes. |
# The variables below are only used by the child processes. |
Line 102 my $ConnectionCount = 0;
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Line 106 my $ConnectionCount = 0;
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my $IdleSeconds = 0; # Number of seconds idle. |
my $IdleSeconds = 0; # Number of seconds idle. |
my $Status = ""; # Current status string. |
my $Status = ""; # Current status string. |
my $RecentLogEntry = ""; |
my $RecentLogEntry = ""; |
my $ConnectionRetries=2; # Number of connection retries allowed. |
my $ConnectionRetries=5; # Number of connection retries allowed. |
my $ConnectionRetriesLeft=2; # Number of connection retries remaining. |
my $ConnectionRetriesLeft=5; # Number of connection retries remaining. |
my $LondVersion = "unknown"; # Version of lond we talk with. |
my $LondVersion = "unknown"; # Version of lond we talk with. |
my $KeyMode = ""; # e.g. ssl, local, insecure from last connect. |
my $KeyMode = ""; # e.g. ssl, local, insecure from last connect. |
my $LondConnecting = 0; # True when a connection is being built. |
my $LondConnecting = 0; # True when a connection is being built. |
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# DO NOT SET THE NEXT VARIABLE TO NON ZERO!!!!!!!!!!!!!!! |
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my $DieWhenIdle = 0; # When true children die when trimmed -> 0. |
my $DieWhenIdle = 1; # When true children die when trimmed -> 0. |
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my $hosts_tab = 1; # True if we are using a static hosts.tab |
my $I_am_child = 0; # True if this is the child process. |
my $I_am_child = 0; # True if this is the child process. |
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# |
# |
Line 149 sub UpdateStatus {
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Line 153 sub UpdateStatus {
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Makes an entry into the permanent log file. |
Makes an entry into the permanent log file. |
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=cut |
=cut |
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sub LogPerm { |
sub LogPerm { |
my $message=shift; |
my $message=shift; |
my $execdir=$perlvar{'lonDaemons'}; |
my $execdir=$perlvar{'lonDaemons'}; |
Line 194 sub Log {
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Line 199 sub Log {
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my $now = time; |
my $now = time; |
my $local = localtime($now); |
my $local = localtime($now); |
my $finalformat = "$local ($$) [$RemoteHost] [$Status] "; |
my $finalformat = "$local ($$) [$RemoteHost] [$Status] "; |
my $finalformat = $finalformat.$format."\n"; |
$finalformat = $finalformat.$format."\n"; |
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# open the file and put the result. |
# open the file and put the result. |
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Line 268 sub SocketDump {
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Line 273 sub SocketDump {
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and as what we return in a SIGUSR1 |
and as what we return in a SIGUSR1 |
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=cut |
=cut |
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sub ShowStatus { |
sub ShowStatus { |
my $state = shift; |
my $state = shift; |
my $now = time; |
my $now = time; |
Line 278 sub ShowStatus {
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Line 284 sub ShowStatus {
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=pod |
=pod |
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=head 2 SocketTimeout |
=head2 SocketTimeout |
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Called when an action on the socket times out. The socket is |
Called when an action on the socket times out. The socket is |
destroyed and any active transaction is failed. |
destroyed and any active transaction is failed. |
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=cut |
=cut |
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sub SocketTimeout { |
sub SocketTimeout { |
my $Socket = shift; |
my $Socket = shift; |
Log("WARNING", "A socket timeout was detected"); |
Log("WARNING", "A socket timeout was detected"); |
Line 325 sub child_exit {
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Line 332 sub child_exit {
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# during which no listens will be done on the |
# during which no listens will be done on the |
# lonnet client socket. |
# lonnet client socket. |
# |
# |
my $lock_file = GetLoncSocketPath().".lock"; |
my $lock_file = &GetLoncSocketPath().".lock"; |
open(LOCK,">$lock_file"); |
open(LOCK,">$lock_file"); |
print LOCK "Contents not important"; |
print LOCK "Contents not important"; |
close(LOCK); |
close(LOCK); |
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if ($hosts_tab) { |
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unlink(&GetLoncSocketPath()); |
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} |
exit(0); |
exit(0); |
} |
} |
# Now figure out how we exit: |
# Now figure out how we exit: |
Line 417 sub Tick {
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Line 426 sub Tick {
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$KeyMode = ""; |
$KeyMode = ""; |
$clock_watcher->cancel(); |
$clock_watcher->cancel(); |
} |
} |
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&UpdateStatus(); |
} |
} |
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=pod |
=pod |
Line 670 sub FailTransaction {
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Line 680 sub FailTransaction {
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if ($ConnectionRetriesLeft > 0) { |
if ($ConnectionRetriesLeft > 0) { |
Log("WARNING", "Failing transaction " |
Log("WARNING", "Failing transaction " |
.$transaction->getRequest()); |
.$transaction->getLoggableRequest()); |
} |
} |
Debug(1, "Failing transaction: ".$transaction->getRequest()); |
Debug(1, "Failing transaction: ".$transaction->getLoggableRequest()); |
if (!$transaction->isDeferred()) { # If the transaction is deferred we'll get to it. |
if (!$transaction->isDeferred()) { # If the transaction is deferred we'll get to it. |
my $client = $transaction->getClient(); |
my $client = $transaction->getClient(); |
Debug(1," Replying con_lost to ".$transaction->getRequest()); |
Debug(1," Replying con_lost to ".$transaction->getRequest()); |
Line 682 sub FailTransaction {
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Line 692 sub FailTransaction {
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} |
} |
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=pod |
=pod |
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=head1 EmptyQueue |
=head1 EmptyQueue |
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Fails all items in the work queue with con_lost. |
Fails all items in the work queue with con_lost. |
Note that each item in the work queue is a transaction. |
Note that each item in the work queue is a transaction. |
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=cut |
=cut |
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sub EmptyQueue { |
sub EmptyQueue { |
$ConnectionRetriesLeft--; # Counts as connection failure too. |
$ConnectionRetriesLeft--; # Counts as connection failure too. |
while($WorkQueue->Count()) { |
while($WorkQueue->Count()) { |
Line 703 sub EmptyQueue {
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Line 715 sub EmptyQueue {
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Close all connections open on lond prior to exit e.g. |
Close all connections open on lond prior to exit e.g. |
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=cut |
=cut |
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sub CloseAllLondConnections { |
sub CloseAllLondConnections { |
foreach my $Socket (keys %ActiveConnections) { |
foreach my $Socket (keys %ActiveConnections) { |
if(exists($ActiveTransactions{$Socket})) { |
if(exists($ActiveTransactions{$Socket})) { |
Line 711 sub CloseAllLondConnections {
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Line 724 sub CloseAllLondConnections {
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KillSocket($Socket); |
KillSocket($Socket); |
} |
} |
} |
} |
=cut |
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=pod |
=pod |
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Line 733 Parameters:
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Line 745 Parameters:
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nonzero if we are allowed to create a new connection. |
nonzero if we are allowed to create a new connection. |
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=cut |
=cut |
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sub KillSocket { |
sub KillSocket { |
my $Socket = shift; |
my $Socket = shift; |
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Line 946 sub LondReadable {
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Line 958 sub LondReadable {
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# We need to be writable for this and probably don't belong |
# We need to be writable for this and probably don't belong |
# here inthe first place. |
# here inthe first place. |
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Deubg(6, "SendingRequest state encountered in readable"); |
Debug(6, "SendingRequest state encountered in readable"); |
$Watcher->poll("w"); |
$Watcher->poll("w"); |
$Watcher->cb(\&LondWritable); |
$Watcher->cb(\&LondWritable); |
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Line 1147 sub LondWritable {
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Line 1159 sub LondWritable {
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=pod |
=pod |
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=cut |
=cut |
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sub QueueDelayed { |
sub QueueDelayed { |
Debug(3,"QueueDelayed called"); |
Debug(3,"QueueDelayed called"); |
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Line 1154 sub QueueDelayed {
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Line 1167 sub QueueDelayed {
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Debug(4, "Delayed path: ".$path); |
Debug(4, "Delayed path: ".$path); |
opendir(DIRHANDLE, $path); |
opendir(DIRHANDLE, $path); |
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my @alldelayed = grep /\.$RemoteHost$/, readdir DIRHANDLE; |
my @all_host_ids; |
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my $host_iterator = &LondConnection::GetHostIterator(); |
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while (!$host_iterator->end()) { |
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my ($host_id,$host_name) = @{$host_iterator->get()}[0,3]; |
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if ($host_name eq $RemoteHost) { |
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push(@all_host_ids, $host_id); |
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} |
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$host_iterator->next(); |
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} |
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my $host_id_re = '(?:'.join('|',@all_host_ids).')'; |
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my @alldelayed = grep(/\.$host_id_re$/, readdir(DIRHANDLE)); |
closedir(DIRHANDLE); |
closedir(DIRHANDLE); |
my $dfname; |
foreach my $dfname (sort(@alldelayed)) { |
my $reqfile; |
my $reqfile = "$path/$dfname"; |
foreach $dfname (sort @alldelayed) { |
my ($host_id) = ($dfname =~ /\.([^.]*)$/); |
$reqfile = "$path/$dfname"; |
Debug(4, "queueing ".$reqfile." for $host_id"); |
Debug(4, "queueing ".$reqfile); |
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my $Handle = IO::File->new($reqfile); |
my $Handle = IO::File->new($reqfile); |
my $cmd = <$Handle>; |
my $cmd = <$Handle>; |
chomp $cmd; # There may or may not be a newline... |
chomp $cmd; # There may or may not be a newline... |
$cmd = $cmd."\n"; # now for sure there's exactly one newline. |
$cmd = $cmd."\n"; # now for sure there's exactly one newline. |
my $Transaction = LondTransaction->new($cmd); |
my $Transaction = LondTransaction->new("sethost:$host_id:$cmd"); |
$Transaction->SetDeferred($reqfile); |
$Transaction->SetDeferred($reqfile); |
QueueTransaction($Transaction); |
QueueTransaction($Transaction); |
} |
} |
Line 1507 another event handler to subess requests
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Line 1529 another event handler to subess requests
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=cut |
=cut |
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sub SetupLoncListener { |
sub SetupLoncListener { |
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my ($host,$SocketName) = @_; |
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if (!$host) { $host = &GetServerHost(); } |
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if (!$SocketName) { $SocketName = &GetLoncSocketPath($host); } |
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my $host = GetServerHost(); # Default host. |
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if (@_) { |
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($host) = @_ # Override host with parameter. |
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} |
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my $socket; |
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my $SocketName = GetLoncSocketPath($host); |
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unlink($SocketName); |
unlink($SocketName); |
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my $socket; |
unless ($socket =IO::Socket::UNIX->new(Local => $SocketName, |
unless ($socket =IO::Socket::UNIX->new(Local => $SocketName, |
Listen => 250, |
Listen => 250, |
Type => SOCK_STREAM)) { |
Type => SOCK_STREAM)) { |
Line 1555 into the status file.
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Line 1576 into the status file.
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We also use this to reset the retries count in order to allow the |
We also use this to reset the retries count in order to allow the |
client to retry connections with a previously dead server. |
client to retry connections with a previously dead server. |
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=cut |
=cut |
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sub ChildStatus { |
sub ChildStatus { |
Line 1563 sub ChildStatus {
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Line 1585 sub ChildStatus {
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Debug(2, "Reporting child status because : ".$watcher->data); |
Debug(2, "Reporting child status because : ".$watcher->data); |
my $docdir = $perlvar{'lonDocRoot'}; |
my $docdir = $perlvar{'lonDocRoot'}; |
my $fh = IO::File->new(">>$docdir/lon-status/loncstatus.txt"); |
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print $fh $$."\t".$RemoteHost."\t".$Status."\t". |
open(LOG,">>$docdir/lon-status/loncstatus.txt"); |
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flock(LOG,LOCK_EX); |
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print LOG $$."\t".$RemoteHost."\t".$Status."\t". |
$RecentLogEntry."\n"; |
$RecentLogEntry."\n"; |
# |
# |
# Write out information about each of the connections: |
# Write out information about each of the connections: |
# |
# |
if ($DebugLevel > 2) { |
if ($DebugLevel > 2) { |
print $fh "Active connection statuses: \n"; |
print LOG "Active connection statuses: \n"; |
my $i = 1; |
my $i = 1; |
print STDERR "================================= Socket Status Dump:\n"; |
print STDERR "================================= Socket Status Dump:\n"; |
foreach my $item (keys %ActiveConnections) { |
foreach my $item (keys %ActiveConnections) { |
my $Socket = $ActiveConnections{$item}->data; |
my $Socket = $ActiveConnections{$item}->data; |
my $state = $Socket->GetState(); |
my $state = $Socket->GetState(); |
print $fh "Connection $i State: $state\n"; |
print LOG "Connection $i State: $state\n"; |
print STDERR "---------------------- Connection $i \n"; |
print STDERR "---------------------- Connection $i \n"; |
$Socket->Dump(-1); # Ensure it gets dumped.. |
$Socket->Dump(-1); # Ensure it gets dumped.. |
$i++; |
$i++; |
} |
} |
} |
} |
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flock(LOG,LOCK_UN); |
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close(LOG); |
$ConnectionRetriesLeft = $ConnectionRetries; |
$ConnectionRetriesLeft = $ConnectionRetries; |
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UpdateStatus(); |
} |
} |
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=pod |
=pod |
Line 1603 sub SignalledToDeath {
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Line 1630 sub SignalledToDeath {
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chomp($signal); |
chomp($signal); |
Log("CRITICAL", "Abnormal exit. Child $$ for $RemoteHost " |
Log("CRITICAL", "Abnormal exit. Child $$ for $RemoteHost " |
."died through "."\"$signal\""); |
."died through "."\"$signal\""); |
LogPerm("F:lonc: $$ on $RemoteHost signalled to death: " |
#LogPerm("F:lonc: $$ on $RemoteHost signalled to death: " |
."\"$signal\""); |
# ."\"$signal\""); |
exit 0; |
exit 0; |
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} |
} |
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=pod |
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=head2 ToggleDebug |
=head2 ToggleDebug |
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This sub toggles trace debugging on and off. |
This sub toggles trace debugging on and off. |
Line 1624 sub ToggleDebug {
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Line 1653 sub ToggleDebug {
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} |
} |
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=pod |
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=head2 ChildProcess |
=head2 ChildProcess |
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This sub implements a child process for a single lonc daemon. |
This sub implements a child process for a single lonc daemon. |
Line 1650 sub ChildProcess {
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Line 1681 sub ChildProcess {
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Debug(5, "Killing watcher for $listener"); |
Debug(5, "Killing watcher for $listener"); |
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$watcher->cancel(); |
$watcher->cancel(); |
undef $parent_dispatchers{$listener}; |
delete($parent_dispatchers{$listener}); |
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} |
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# kill off the parent's signal handlers too! |
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# |
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for my $handler (keys %parent_handlers) { |
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my $watcher = $parent_handlers{$handler}; |
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$watcher->cancel(); |
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delete($parent_handlers{$handler}); |
} |
} |
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$I_am_child = 1; # Seems like in spite of it all I may still getting |
$I_am_child = 1; # Seems like in spite of it all I may still getting |
# parent event dispatches.. flag I'm a child. |
# parent event dispatches.. flag I'm a child. |
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Line 1692 sub ChildProcess {
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Line 1733 sub ChildProcess {
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desc => 'Lonc Listener Unix Socket', |
desc => 'Lonc Listener Unix Socket', |
fd => $socket); |
fd => $socket); |
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$Event::Debuglevel = $DebugLevel; |
$Event::DebugLevel = $DebugLevel; |
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Debug(9, "Making initial lond connection for ".$RemoteHost); |
Debug(9, "Making initial lond connection for ".$RemoteHost); |
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Line 1766 sub parent_client_connection {
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Line 1807 sub parent_client_connection {
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my ($event) = @_; |
my ($event) = @_; |
my $watcher = $event->w; |
my $watcher = $event->w; |
my $socket = $watcher->fd; |
my $socket = $watcher->fd; |
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if ($hosts_tab) { |
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# Lookup the host associated with this socket: |
# Lookup the host associated with this socket: |
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my $host = $listening_to{$socket}; |
my $host = $listening_to{$socket}; |
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# Start the child: |
# Start the child: |
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&Debug(9,"Creating child for $host (parent_client_connection)"); |
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&CreateChild($host, $socket); |
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# Clean up the listen since now the child takes over until it exits. |
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$watcher->cancel(); # Nolonger listening to this event |
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delete($listening_to{$socket}); |
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delete($parent_dispatchers{$host}); |
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$socket->close(); |
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} else { |
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my $connection = $socket->accept(); # Accept the client connection. |
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Event->io(cb => \&get_remote_hostname, |
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poll => 'r', |
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data => "", |
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fd => $connection); |
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} |
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} |
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} |
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sub get_remote_hostname { |
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my ($event) = @_; |
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my $watcher = $event->w; |
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my $socket = $watcher->fd; |
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my $thisread; |
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my $rv = $socket->recv($thisread, POSIX::BUFSIZ, 0); |
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Debug(8, "rcv: data length = ".length($thisread)." read =".$thisread); |
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if (!defined($rv) || length($thisread) == 0) { |
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# Likely eof on socket. |
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Debug(5,"Client Socket closed on lonc for p_c_c"); |
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close($socket); |
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$watcher->cancel(); |
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return; |
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} |
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my $data = $watcher->data().$thisread; |
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$watcher->data($data); |
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if($data =~ /\n$/) { # Request entirely read. |
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chomp($data); |
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} else { |
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return; |
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} |
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&Debug(9,"Creating child for $host (parent_client_connection)"); |
&Debug(5,"Creating child for $data (parent_client_connection)"); |
&CreateChild($host, $socket); |
&CreateChild($data); |
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# Clean up the listen since now the child takes over until it exits. |
# Clean up the listen since now the child takes over until it exits. |
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$watcher->cancel(); # Nolonger listening to this event |
$watcher->cancel(); # Nolonger listening to this event |
delete($listening_to{$socket}); |
$socket->send("done\n"); |
delete($parent_dispatchers{$host}); |
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$socket->close(); |
$socket->close(); |
} |
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} |
} |
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# parent_listen: |
# parent_listen: |
Line 1806 sub parent_listen {
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Line 1889 sub parent_listen {
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my ($loncapa_host) = @_; |
my ($loncapa_host) = @_; |
Debug(5, "parent_listen: $loncapa_host"); |
Debug(5, "parent_listen: $loncapa_host"); |
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my $socket = &SetupLoncListener($loncapa_host); |
my ($socket,$file); |
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if (!$loncapa_host) { |
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$loncapa_host = 'common_parent'; |
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$file = $perlvar{'lonSockCreate'}; |
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} else { |
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$file = &GetLoncSocketPath($loncapa_host); |
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} |
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$socket = &SetupLoncListener($loncapa_host,$file); |
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$listening_to{$socket} = $loncapa_host; |
$listening_to{$socket} = $loncapa_host; |
if (!$socket) { |
if (!$socket) { |
die "Unable to create a listen socket for $loncapa_host"; |
die "Unable to create a listen socket for $loncapa_host"; |
} |
} |
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my $lock_file = &GetLoncSocketPath($loncapa_host).".lock"; |
my $lock_file = $file.".lock"; |
unlink($lock_file); # No problem if it doesn't exist yet [startup e.g.] |
unlink($lock_file); # No problem if it doesn't exist yet [startup e.g.] |
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my $watcher = Event->io(cb => \&parent_client_connection, |
my $watcher = |
poll => 'r', |
Event->io(cb => \&parent_client_connection, |
desc => "Parent listener unix socket ($loncapa_host)", |
poll => 'r', |
fd => $socket); |
desc => "Parent listener unix socket ($loncapa_host)", |
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data => "", |
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fd => $socket); |
$parent_dispatchers{$loncapa_host} = $watcher; |
$parent_dispatchers{$loncapa_host} = $watcher; |
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} |
} |
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sub parent_clean_up { |
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my ($loncapa_host) = @_; |
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Debug(5, "parent_clean_up: $loncapa_host"); |
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my $socket_file = &GetLoncSocketPath($loncapa_host); |
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unlink($socket_file); # No problem if it doesn't exist yet [startup e.g.] |
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my $lock_file = $socket_file.".lock"; |
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unlink($lock_file); # No problem if it doesn't exist yet [startup e.g.] |
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} |
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# listen_on_all_unix_sockets: |
# listen_on_all_unix_sockets: |
# This sub initiates a listen on all unix domain lonc client sockets. |
# This sub initiates a listen on all unix domain lonc client sockets. |
Line 1845 sub listen_on_all_unix_sockets {
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Line 1948 sub listen_on_all_unix_sockets {
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my $host_iterator = &LondConnection::GetHostIterator(); |
my $host_iterator = &LondConnection::GetHostIterator(); |
while (!$host_iterator->end()) { |
while (!$host_iterator->end()) { |
my $host_entry_ref = $host_iterator->get(); |
my $host_entry_ref = $host_iterator->get(); |
my $host_name = $host_entry_ref->[0]; |
my $host_name = $host_entry_ref->[3]; |
Debug(9, "Listen for $host_name"); |
Debug(9, "Listen for $host_name"); |
&parent_listen($host_name); |
&parent_listen($host_name); |
$host_iterator->next(); |
$host_iterator->next(); |
} |
} |
} |
} |
|
|
|
sub listen_on_common_socket { |
|
Debug(5, "listen_on_common_socket"); |
|
&parent_listen(); |
|
} |
|
|
# server_died is called whenever a child process exits. |
# server_died is called whenever a child process exits. |
# Since this is dispatched via a signal, we must process all |
# Since this is dispatched via a signal, we must process all |
# dead children until there are no more left. The action |
# dead children until there are no more left. The action |
Line 1876 sub server_died {
|
Line 1984 sub server_died {
|
&Debug(9, "Caught sigchild for $host"); |
&Debug(9, "Caught sigchild for $host"); |
delete($ChildHash{$pid}); |
delete($ChildHash{$pid}); |
delete($HostToPid{$host}); |
delete($HostToPid{$host}); |
&parent_listen($host); |
if ($hosts_tab) { |
|
&parent_listen($host); |
|
} else { |
|
&parent_clean_up($host); |
|
} |
|
|
} else { |
} else { |
&Debug(5, "Caught sigchild for pid not in hosts hash: $pid"); |
&Debug(5, "Caught sigchild for pid not in hosts hash: $pid"); |
} |
} |
Line 1937 my $HostIterator = LondConnection::GetHo
|
Line 2049 my $HostIterator = LondConnection::GetHo
|
|
|
if ($DieWhenIdle) { |
if ($DieWhenIdle) { |
$RemoteHost = "[parent]"; |
$RemoteHost = "[parent]"; |
&listen_on_all_unix_sockets(); |
if ($hosts_tab) { |
|
&listen_on_all_unix_sockets(); |
|
} else { |
|
&listen_on_common_socket(); |
|
} |
} else { |
} else { |
|
|
while (! $HostIterator->end()) { |
while (! $HostIterator->end()) { |
Line 1965 if ($DieWhenIdle) {
|
Line 2081 if ($DieWhenIdle) {
|
signal => "CHLD"); |
signal => "CHLD"); |
|
|
|
|
|
# Set up all the other signals we set up. We'll vector them off to the |
|
# same subs as we would for DieWhenIdle false and, if necessary, conditionalize |
|
# the code there. |
|
|
|
$parent_handlers{INT} = Event->signal(cb => \&Terminate, |
|
desc => "Parent INT handler", |
|
signal => "INT"); |
|
$parent_handlers{TERM} = Event->signal(cb => \&Terminate, |
|
desc => "Parent TERM handler", |
|
signal => "TERM"); |
|
if ($hosts_tab) { |
|
$parent_handlers{HUP} = Event->signal(cb => \&Restart, |
|
desc => "Parent HUP handler.", |
|
signal => "HUP"); |
|
} else { |
|
$parent_handlers{HUP} = Event->signal(cb => \&KillThemAll, |
|
desc => "Parent HUP handler.", |
|
signal => "HUP"); |
|
} |
|
$parent_handlers{USR1} = Event->signal(cb => \&CheckKids, |
|
desc => "Parent USR1 handler", |
|
signal => "USR1"); |
|
$parent_handlers{USR2} = Event->signal(cb => \&UpdateKids, |
|
desc => "Parent USR2 handler.", |
|
signal => "USR2"); |
|
|
|
# Start procdesing events. |
|
|
$Event::DebugLevel = $DebugLevel; |
$Event::DebugLevel = $DebugLevel; |
Debug(9, "Parent entering event loop"); |
Debug(9, "Parent entering event loop"); |
my $ret = Event::loop(); |
my $ret = Event::loop(); |
Line 1978 if ($DieWhenIdle) {
|
Line 2122 if ($DieWhenIdle) {
|
|
|
$SIG{INT} = \&Terminate; |
$SIG{INT} = \&Terminate; |
$SIG{TERM} = \&Terminate; |
$SIG{TERM} = \&Terminate; |
$SIG{HUP} = \&Restart; |
if ($hosts_tab) { |
|
$SIG{HUP} = \&Restart; |
|
} else { |
|
$SIG{HUP} = \&KillThemAll; |
|
} |
$SIG{USR1} = \&CheckKids; |
$SIG{USR1} = \&CheckKids; |
$SIG{USR2} = \&UpdateKids; # LonManage update request. |
$SIG{USR2} = \&UpdateKids; # LonManage update request. |
|
|
Line 2016 sub CheckKids {
|
Line 2164 sub CheckKids {
|
my $now=time; |
my $now=time; |
my $local=localtime($now); |
my $local=localtime($now); |
print $fh "LONC status $local - parent $$ \n\n"; |
print $fh "LONC status $local - parent $$ \n\n"; |
|
foreach my $host (keys %parent_dispatchers) { |
|
print $fh "LONC Parent process listening for $host\n"; |
|
} |
foreach my $pid (keys %ChildHash) { |
foreach my $pid (keys %ChildHash) { |
Debug(2, "Sending USR1 -> $pid"); |
Debug(2, "Sending USR1 -> $pid"); |
kill 'USR1' => $pid; # Tell Child to report status. |
kill 'USR1' => $pid; # Tell Child to report status. |
sleep 1; # Wait so file doesn't intermix. |
|
} |
} |
|
|
} |
} |
|
|
=pod |
=pod |
Line 2053 sub UpdateKids {
|
Line 2204 sub UpdateKids {
|
|
|
Log("INFO", "Updating connections via SIGUSR2"); |
Log("INFO", "Updating connections via SIGUSR2"); |
|
|
# Just in case we need to kill our own lonc, we wait a few seconds to |
# I'm not sure what I was thinking in the first implementation. |
# give it a chance to receive and relay lond's response to the |
# someone will have to work hard to convince me the effect is any |
# re-init command. |
# different than Restart, especially now that we don't start up |
# |
# per host servers automatically, may as well just restart. |
|
# The down side is transactions that are in flight will get timed out |
sleep(2); # Wait a couple of seconds. |
# (lost unless they are critical). |
|
|
my %hosts; # Indexed by loncapa hostname, value=ip. |
|
|
|
# Need to re-read the host table: |
|
|
|
|
|
LondConnection::ReadConfig(); |
|
my $I = LondConnection::GetHostIterator; |
|
while (! $I->end()) { |
|
my $item = $I->get(); |
|
$hosts{$item->[0]} = $item->[4]; |
|
$I->next(); |
|
} |
|
|
|
# The logic below is written for clarity not for efficiency. |
|
# Since I anticipate that this function is only rarely called, that's |
|
# appropriate. There are certainly ways to combine the loops below, |
|
# and anyone wishing to obscure the logic is welcome to go for it. |
|
# Note that we don't re-direct sigchild. Instead we do what's needed |
|
# to the data structures that keep track of children to ensure that |
|
# when sigchild is honored, no new child is born. |
|
# |
|
|
|
# For each existing child; if it's host doesn't exist, kill the child. |
|
|
|
foreach my $child (keys %ChildHash) { |
|
my $oldhost = $ChildHash{$child}; |
|
if (!(exists $hosts{$oldhost})) { |
|
Log("CRITICAL", "Killing child for $oldhost host no longer exists"); |
|
delete $ChildHash{$child}; |
|
delete $HostToPid{$oldhost}; |
|
kill 'QUIT' => $child; |
|
} |
|
} |
|
# For each remaining existing child; if it's host's ip has changed, |
|
# Restart the child on the new IP. |
|
|
|
foreach my $child (keys %ChildHash) { |
if ($hosts_tab) { |
my $oldhost = $ChildHash{$child}; |
&Restart(); |
my $oldip = $HostHash{$oldhost}; |
} else { |
if ($hosts{$oldhost} ne $oldip) { |
&KillThemAll(); |
|
|
# kill the old child. |
|
|
|
Log("CRITICAL", "Killing child for $oldhost host ip has changed..."); |
|
delete $ChildHash{$child}; |
|
delete $HostToPid{$oldhost}; |
|
kill 'QUIT' => $child; |
|
|
|
# Do the book-keeping needed to start a new child on the |
|
# new ip. |
|
|
|
$HostHash{$oldhost} = $hosts{$oldhost}; |
|
CreateChild($oldhost); |
|
} |
|
} |
|
# Finally, for each new host, not in the host hash, create a |
|
# enter the host and create a new child. |
|
# Force a status display of any existing process. |
|
|
|
foreach my $host (keys %hosts) { |
|
if(!(exists $HostHash{$host})) { |
|
Log("INFO", "New host $host discovered in hosts.tab..."); |
|
$HostHash{$host} = $hosts{$host}; |
|
CreateChild($host); |
|
} else { |
|
kill 'HUP' => $HostToPid{$host}; # status display. |
|
} |
|
} |
} |
} |
} |
|
|
Line 2146 sub Restart {
|
Line 2234 sub Restart {
|
Log("CRITICAL", "Restarting"); |
Log("CRITICAL", "Restarting"); |
my $execdir = $perlvar{'lonDaemons'}; |
my $execdir = $perlvar{'lonDaemons'}; |
unlink("$execdir/logs/lonc.pid"); |
unlink("$execdir/logs/lonc.pid"); |
exec("$execdir/loncnew"); |
exec("$executable"); |
} |
} |
|
|
=pod |
=pod |
Line 2167 sub KillThemAll {
|
Line 2255 sub KillThemAll {
|
Log("CRITICAL", "Nicely Killing lonc for $serving pid = $pid"); |
Log("CRITICAL", "Nicely Killing lonc for $serving pid = $pid"); |
kill 'QUIT' => $pid; |
kill 'QUIT' => $pid; |
} |
} |
|
|
|
|
} |
} |
|
|
|
|
Line 2190 sub really_kill_them_all_dammit
|
Line 2276 sub really_kill_them_all_dammit
|
unlink("$execdir/logs/lonc.pid"); |
unlink("$execdir/logs/lonc.pid"); |
} |
} |
} |
} |
|
|
=pod |
=pod |
|
|
=head1 Terminate |
=head1 Terminate |