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Diff for /loncom/lond between versions 1.153 and 1.158

version 1.153, 2003/10/08 14:30:09 version 1.158, 2003/10/21 09:14:31
Line 59 Line 59
 #       - pushing /home/httpd/lonTabs/domain.tab  #       - pushing /home/httpd/lonTabs/domain.tab
 # 09/08/2003 Ron Fox:  Told lond to take care of change logging so we  # 09/08/2003 Ron Fox:  Told lond to take care of change logging so we
 #      don't have to remember it:  #      don't have to remember it:
 # $Log$  #
 # Revision 1.153  2003/10/08 14:30:09  www  # Change Log:
 # Minor typos.  #   $Log$
 #  #   Revision 1.158  2003/10/21 09:14:31  foxr
 # Revision 1.152  2003/10/08 14:18:34  www  #   Re-install $Log$ in comment header to support automatic change logging.
 # Not good: this should be backported into 1.0.2!  #
 #  
 # Revision 1.151  2003/10/03 15:11:03  albertel  
 # - if we fail to fetch an update to the file, don't blow away the old one  
 #   (this was the BUG that blew away that one default.sequence that Matthew  
 #    ended up restoring from data.)  
 #  
 # Revision 1.150  2003/09/30 10:16:06  foxr  
 # Added invocation of apachereload in ReloadApache sub.  
 # This completes the addtion of the reinit functionality.  
 #  
 # Revision 1.149  2003/09/30 09:44:13  foxr  
 # Tested UpdateHosts ability to  
 # - Remove live children for hosts that are no longer in the hosts.tab  
 # - Remove live children for hosts whose IPs have changed in the hosts.tab  
 #  
 # Revision 1.148  2003/09/29 10:09:18  foxr  
 # Put in logic to reinit lond itself (except for apache reload).  I don't believe  
 # this logic works correctly yet, however lond still does everything it used to doso I'll do the commit anyway.  
 #  
 # Revision 1.147  2003/09/23 11:23:31  foxr  
 # Comlplete implementation of reinit functionality.  Must still implement  
 # the actual initialization functionality, but the process can now  
 # receive the request and either invoke the appropriate internal function or  
 # signal the correct lonc.  
 #  
 # Revision 1.146  2003/09/16 10:28:14  foxr  
 # ReinitProcess - decode the process selector and produce the associated pid  
 # filename.  Note: While it is possible to test that valid process selectors are  
 # handled properly I am not able to test that invalid process selectors produce  
 # the appropriate error as lonManage also blocks the use of invalid process selectors.  
 #  
 # Revision 1.145  2003/09/16 10:13:20  foxr  
 # Added ReinitProcess function to oversee the parsing and processing of the  
 # reinit:<process> client request.  
 #  
 # Revision 1.144  2003/09/16 09:47:01  foxr  
 # Added skeletal support for SIGUSR2 (update hosts.tab)  
 #  
 # Revision 1.143  2003/09/15 10:03:52  foxr  
 # Completed and tested code for pushfile.  
 #  
 # Revision 1.142  2003/09/09 20:47:46  www  
 # Permanently store chatroom entries in chatroom.log  
 #  
 # Revision 1.141  2003/09/08 10:32:07  foxr  
 # Added PushFile sub This sub oversees the push of a new configuration table file  
 # Currently supported files are:  
 # - hosts.tab   (transaction pushfile:hosts:contents)  
 # - domain.tab  (transaction pushfile:domain:contents)  
 #  #
   
   
Line 154  my $thisserver; Line 105  my $thisserver;
 my %hostid;  my %hostid;
 my %hostdom;  my %hostdom;
 my %hostip;  my %hostip;
   my %managers; # If defined $managers{hostname} is a manager
 my %perlvar; # Will have the apache conf defined perl vars.  my %perlvar; # Will have the apache conf defined perl vars.
   
 #  #
Line 210  sub GetCertificate { Line 162  sub GetCertificate {
   
     return $clientip;      return $clientip;
 }  }
   #
   #   ReadManagerTable: Reads in the current manager table. For now this is
   #                     done on each manager authentication because:
   #                     - These authentications are not frequent
   #                     - This allows dynamic changes to the manager table
   #                       without the need to signal to the lond.
   #
   
   sub ReadManagerTable {
   
       #   Clean out the old table first..
   
       foreach my $key (keys %managers) {
    delete $managers{$key};
       }
   
       my $tablename = $perlvar{'lonTabDir'}."/managers.tab";
       if (!open (MANAGERS, $tablename)) {
    logthis('<font color="red">No manager table.  Nobody can manage!!</font>');
    return;
       }
       while(my $host = <MANAGERS>) {
    chomp($host);
    if (!defined $hostip{$host}) {
       logthis('<font color="red"> manager '.$host.
       " not in hosts.tab, rejected as manager</font>");
    } else {
       $managers{$host} = $hostip{$host}; # Whatever for now.
    }
       }
   }
   
 #  #
 #  ValidManager: Determines if a given certificate represents a valid manager.  #  ValidManager: Determines if a given certificate represents a valid manager.
Line 222  sub GetCertificate { Line 204  sub GetCertificate {
 sub ValidManager {  sub ValidManager {
     my $certificate = shift;       my $certificate = shift; 
   
     my $hostentry   = $hostid{$certificate};      ReadManagerTable;
     if ($hostentry ne undef) {  
  &logthis('<font color="yellow">Authenticating manager'.      my $hostname   = $hostid{$certificate};
  " $hostentry</font>");  
  return 1;  
       if ($hostname ne undef) {
    if($managers{$hostname} ne undef) {
       &logthis('<font color="yellow">Authenticating manager'.
        " $hostname</font>");
       return 1;
    } else {
       &logthis('<font color="red" failed manager authentication '.
        $hostname." is not a valid manager host</font>");
       return 0;
    }
     } else {      } else {
  &logthis('<font color="red"> Failed manager authentication '.   &logthis('<font color="red"> Failed manager authentication '.
  "$certificate </font>");   "$certificate </font>");
    return 0;
     }      }
 }  }
 #  #
Line 281  sub CopyFile { Line 274  sub CopyFile {
  return 0;   return 0;
     }      }
 }  }
   #
   #  Host files are passed out with externally visible host IPs.
   #  If, for example, we are behind a fire-wall or NAT host, our 
   #  internally visible IP may be different than the externally
   #  visible IP.  Therefore, we always adjust the contents of the
   #  host file so that the entry for ME is the IP that we believe
   #  we have.  At present, this is defined as the entry that
   #  DNS has for us.  If by some chance we are not able to get a
   #  DNS translation for us, then we assume that the host.tab file
   #  is correct.  
   #    BUGBUGBUG - in the future, we really should see if we can
   #       easily query the interface(s) instead.
   # Parameter(s):
   #     contents    - The contents of the host.tab to check.
   # Returns:
   #     newcontents - The adjusted contents.
   #
   #
   sub AdjustHostContents {
       my $contents  = shift;
       my $adjusted;
       my $me        = $perlvar{'lonHostID'};
   
       foreach my $line (split(/\n/,$contents)) {
    if(!(($line eq "") || ($line =~ /^ *\#/) || ($line =~ /^ *$/))) {
       chomp($line);
       my ($id,$domain,$role,$name,$ip,$maxcon,$idleto,$mincon)=split(/:/,$line);
       if ($id eq $me) {
    open(PIPE, " /usr/bin/host $name |") || die "Cant' make host pipeline";
    my $hostinfo = <PIPE>;
    close PIPE;
   
    my ($hostname, $has, $address, $ipnew) = split(/ /,$hostinfo);
    &logthis('<font color="green">'.
    "hostname = $hostname me = $me, name = $name   actual ip = $ipnew </font>");
   
    if ($hostname eq $name) { # Lookup succeeded..
       &logthis('<font color="green"> look up ok <font>');
       $ip = $ipnew;
    } else {
       &logthis('<font color="green"> Lookup failed: '
        .$hostname." ne $name </font>");
    }
    #  Reconstruct the host line and append to adjusted:
   
    my $newline = "$id:$domain:$role:$name:$ip";
    if($maxcon ne "") { # Not all hosts have loncnew tuning params
       $newline .= ":$maxcon:$idleto:$mincon";
    }
    $adjusted .= $newline."\n";
   
       } else { # Not me, pass unmodified.
    $adjusted .= $line."\n";
       }
    } else {                  # Blank or comment never re-written.
       $adjusted .= $line."\n"; # Pass blanks and comments as is.
    }
       }
       return $adjusted;
   }
 #  #
 #   InstallFile: Called to install an administrative file:  #   InstallFile: Called to install an administrative file:
 #       - The file is created with <name>.tmp  #       - The file is created with <name>.tmp
Line 374  sub PushFile { Line 426  sub PushFile {
     &logthis('<font color="green"> Pushfile: backed up '      &logthis('<font color="green"> Pushfile: backed up '
     .$tablefile." to $backupfile</font>");      .$tablefile." to $backupfile</font>");
           
       #  If the file being pushed is the host file, we adjust the entry for ourself so that the
       #  IP will be our current IP as looked up in dns.  Note this is only 99% good as it's possible
       #  to conceive of conditions where we don't have a DNS entry locally.  This is possible in a 
       #  network sense but it doesn't make much sense in a LonCAPA sense so we ignore (for now)
       #  that possibilty.
   
       if($filename eq "host") {
    $contents = AdjustHostContents($contents);
       }
   
     #  Install the new file:      #  Install the new file:
   
     if(!InstallFile($tablefile, $contents)) {      if(!InstallFile($tablefile, $contents)) {
Line 681  sub checkchildren { Line 743  sub checkchildren {
         }          }
     }      }
     $SIG{ALRM} = 'DEFAULT';      $SIG{ALRM} = 'DEFAULT';
     $SIG{__DIE__} = \&catchcexception;      $SIG{__DIE__} = \&catchexception;
 }  }
   
 # --------------------------------------------------------------------- Logging  # --------------------------------------------------------------------- Logging
Removed from v.1.153  
changed lines
  Added in v.1.158

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