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Diff for /loncom/Attic/lonc between versions 1.22 and 1.27

version 1.22, 2001/11/29 18:57:46 version 1.27, 2002/02/19 21:49:12
Line 39 Line 39
 # 2/8,7/25 Gerd Kortemeyer  # 2/8,7/25 Gerd Kortemeyer
 # 12/05 Scott Harrison  # 12/05 Scott Harrison
 # 12/05 Gerd Kortemeyer  # 12/05 Gerd Kortemeyer
   # YEAR=2001
 # 01/10/01 Scott Harrison  # 01/10/01 Scott Harrison
 # 03/14/01,03/15,06/12,11/26,11/27,11/28 Gerd Kortemeyer  # 03/14/01,03/15,06/12,11/26,11/27,11/28 Gerd Kortemeyer
   # 12/20 Scott Harrison
   # YEAR=2002
   # 2/19/02
 #   # 
 # based on nonforker from Perl Cookbook  # based on nonforker from Perl Cookbook
 # - server who multiplexes without forking  # - server who multiplexes without forking
Line 53  use Socket; Line 57  use Socket;
 use Fcntl;  use Fcntl;
 use Tie::RefHash;  use Tie::RefHash;
 use Crypt::IDEA;  use Crypt::IDEA;
   use Net::Ping;
   use LWP::UserAgent();
   
 my $status='';  my $status='';
 my $lastlog='';  my $lastlog='';
Line 70  sub catchexception { Line 76  sub catchexception {
   
 $childmaxattempts=5;  $childmaxattempts=5;
   
   # -------------------------------------- Routines to see if other box available
   
   sub online {
       my $host=shift;
       my $p=Net::Ping->new("tcp",20);
       my $online=$p->ping("$host");
       $p->close();
       undef ($p);
       return $online;
   }
   
   sub connected {
       my ($local,$remote)=@_;
       $local=~s/\W//g;
       $remote=~s/\W//g;
   
       unless ($hostname{$local}) { return 'local_unknown'; }
       unless ($hostname{$remote}) { return 'remote_unknown'; }
   
       unless (&online($hostname{$local})) { return 'local_offline'; }
   
       my $ua=new LWP::UserAgent;
       
       my $request=new HTTP::Request('GET',
         "http://".$hostname{$local}.'/cgi-bin/ping.pl?'.$remote);
   
       my $response=$ua->request($request);
   
       unless ($response->is_success) { return 'local_error'; }
   
       my $reply=$response->content;
       $reply=(split("\n",$reply))[0];
       $reply=~s/\W//g;
       if ($reply ne $remote) { return $reply; }
       return 'ok';
   }
   
   
 # -------------------------------- Set signal handlers to record abnormal exits  # -------------------------------- Set signal handlers to record abnormal exits
   
 $SIG{'QUIT'}=\&catchexception;  $SIG{QUIT}=\&catchexception;
 $SIG{__DIE__}=\&catchexception;  $SIG{__DIE__}=\&catchexception;
   
 # ------------------------------------ Read httpd access.conf and get variables  # ------------------------------------ Read httpd access.conf and get variables
Line 117  while ($configline=<CONFIG>) { Line 161  while ($configline=<CONFIG>) {
     my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);      my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
     chomp($ip);      chomp($ip);
     $hostip{$id}=$ip;      $hostip{$id}=$ip;
       $hostname{$id}=$name;
 }  }
   
 close(CONFIG);  close(CONFIG);
   
 # -------------------------------------------------------- Routines for forking  # -------------------------------------------------------- Routines for forking
Line 141  sub REAPER {                        # ta Line 187  sub REAPER {                        # ta
     unlink($port);      unlink($port);
 }  }
   
 sub HUNTSMAN {                      # signal handler for SIGINT  sub hangup {
     local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children      foreach (keys %children) {
     map {  
         $wasserver=$children{$_};          $wasserver=$children{$_};
         &status("Closing $wasserver");          &status("Closing $wasserver");
         &logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));          &logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));
         &status("Kill PID $_ for $wasserver");          &status("Kill PID $_ for $wasserver");
  kill ('INT',$_);   kill ('INT',$_);
     } keys %children;      }
   }
   
   sub HUNTSMAN {                      # signal handler for SIGINT
       local($SIG{CHLD}) = 'IGNORE';   # we're going to kill our children
       &hangup();
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
     unlink("$execdir/logs/lonc.pid");      unlink("$execdir/logs/lonc.pid");
     &logthis("<font color=red>CRITICAL: Shutting down</font>");      &logthis("<font color=red>CRITICAL: Shutting down</font>");
Line 158  sub HUNTSMAN {                      # si Line 208  sub HUNTSMAN {                      # si
   
 sub HUPSMAN {                      # signal handler for SIGHUP  sub HUPSMAN {                      # signal handler for SIGHUP
     local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children      local($SIG{CHLD}) = 'IGNORE';  # we're going to kill our children
     map {      &hangup();
         $wasserver=$children{$_};  
         &status("Closing $wasserver");  
         &logthis('Closing '.$wasserver.': '.&subreply('exit',$wasserver));  
         &status("Kill PID $_ for $wasserver");  
  kill ('INT',$_);  
     } keys %children;  
     &logthis("<font color=red>CRITICAL: Restarting</font>");      &logthis("<font color=red>CRITICAL: Restarting</font>");
     unlink("$execdir/logs/lonc.pid");      unlink("$execdir/logs/lonc.pid");
     my $execdir=$perlvar{'lonDaemons'};      my $execdir=$perlvar{'lonDaemons'};
Line 175  sub checkchildren { Line 219  sub checkchildren {
     &initnewstatus();      &initnewstatus();
     &logstatus();      &logstatus();
     &logthis('Going to check on the children');      &logthis('Going to check on the children');
     map {      foreach (sort keys %children) {
  sleep 1;   sleep 1;
         unless (kill 'USR1' => $_) {          unless (kill 'USR1' => $_) {
     &logthis ('Child '.$_.' is dead');      &logthis ('Child '.$_.' is dead');
             &logstatus($$.' is dead');              &logstatus($$.' is dead');
         }           } 
     } sort keys %children;      }
 }  }
   
 sub USRMAN {  sub USRMAN {
     &logthis("USR1: Trying to establish connections again");      &logthis("USR1: Trying to establish connections again");
     foreach $thisserver (keys %hostip) {  
  $answer=subreply("ping",$thisserver);  
         &logthis("USR1: Ping $thisserver "  
         ."(pid >$childpid{$thisserver}<, $childatt{thisserver} attempts): "  
         ." >$answer<");  
     }  
     %childatt=();      %childatt=();
     &checkchildren();      &checkchildren();
 }  }
Line 296  $SIG{HUP}=$SIG{USR1}='IGNORE'; Line 334  $SIG{HUP}=$SIG{USR1}='IGNORE';
 &status("Forking ...");  &status("Forking ...");
   
 foreach $thisserver (keys %hostip) {  foreach $thisserver (keys %hostip) {
     make_new_child($thisserver);      if (&online($hostname{$thisserver})) {
          make_new_child($thisserver);
       }
 }  }
   
 &logthis("Done starting initial servers");  &logthis("Done starting initial servers");
Line 315  while (1) { Line 355  while (1) {
     &status("Woke up");      &status("Woke up");
     foreach $thisserver (keys %hostip) {      foreach $thisserver (keys %hostip) {
         if (!$childpid{$thisserver}) {          if (!$childpid{$thisserver}) {
     if ($childatt{$thisserver}<$childmaxattempts) {      if (($childatt{$thisserver}<$childmaxattempts) &&
                   (&online($hostname{$thisserver}))) {
        $childatt{$thisserver}++;         $childatt{$thisserver}++;
                &logthis(                 &logthis(
    "<font color=yellow>INFO: Trying to reconnect for $thisserver "     "<font color=yellow>INFO: Trying to reconnect for $thisserver "
   ."($childatt{$thisserver} of $childmaxattempts attempts)</font>");     ."($childatt{$thisserver} of $childmaxattempts attempts)</font>"); 
                make_new_child($thisserver);                 make_new_child($thisserver);
     }     } else {
                  &logthis(
      "<font color=yellow>INFO: Skipping $thisserver "
     ."($childatt{$thisserver} of $childmaxattempts attempts)</font>");
              } 
                  
         }                 }       
     }      }
 }  }
Line 447  if ($cipher=new IDEA $cipherkey) { Line 493  if ($cipher=new IDEA $cipherkey) {
     @allbuffered=grep /\.$conserver$/, readdir DIRHANDLE;      @allbuffered=grep /\.$conserver$/, readdir DIRHANDLE;
     closedir(DIRHANDLE);      closedir(DIRHANDLE);
     my $dfname;      my $dfname;
     map {      foreach (@allbuffered) {
         &status("Sending delayed $conserver $_");          &status("Sending delayed $conserver $_");
         $dfname="$path/$_";          $dfname="$path/$_";
         &logthis($dfname);          &logthis($dfname);
Line 488  if ($cipher=new IDEA $cipherkey) { Line 534  if ($cipher=new IDEA $cipherkey) {
             &logthis("Delayed $cmd to $conserver: >$answer<");              &logthis("Delayed $cmd to $conserver: >$answer<");
             &logperm("S:$conserver:$bcmd");              &logperm("S:$conserver:$bcmd");
         }                  }        
     } @allbuffered;      }
   
 # ------------------------------------------------------- Listen to UNIX socket  # ------------------------------------------------------- Listen to UNIX socket
 &status("Opening socket $conserver");  &status("Opening socket $conserver");
Line 693  sub nonblock { Line 739  sub nonblock {
             or die "Can't make socket nonblocking: $!\n";              or die "Can't make socket nonblocking: $!\n";
 }  }
   
   # ----------------------------------- POD (plain old documentation, CPAN style)
   
   =head1 NAME
   
   lonc - LON TCP-MySQL-Server Daemon for handling database requests.
   
   =head1 SYNOPSIS
   
   Should only be run as user=www.  This is a command-line script which
   is invoked by loncron.
   
   =head1 DESCRIPTION
   
   Provides persistent TCP connections to the other servers in the network
   through multiplexed domain sockets
   
    PID in subdir logs/lonc.pid
    kill kills
    HUP restarts
    USR1 tries to open connections again
   
   =head1 README
   
   Not yet written.
   
   =head1 PREREQUISITES
   
   POSIX
   IO::Socket
   IO::Select
   IO::File
   Socket
   Fcntl
   Tie::RefHash
   Crypt::IDEA
   
   =head1 COREQUISITES
   
   =head1 OSNAMES
   
   linux
   
   =head1 SCRIPT CATEGORIES
   
   Server/Process
   
   =cut
Removed from v.1.22  
changed lines
  Added in v.1.27

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