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Diff for /loncom/loncron between versions 1.3 and 1.79

version 1.3, 2000/02/08 17:34:24 version 1.79, 2009/02/11 15:24:28
Line 1 Line 1
 #!/usr/bin/perl  #!/usr/bin/perl
   
 # The LearningOnline Network  # Housekeeping program, started by cron, loncontrol and loncron.pl
 # Housekeeping program, started by cron  
 #  #
 # (TCP networking package  # $Id$
 # 6/1/99,6/2,6/10,6/11,6/12,6/14,6/26,6/28,6/29,6/30,  
 # 7/1,7/2,7/9,7/10,7/12 Gerd Kortemeyer)  
 #  #
 # 7/14,7/15,7/19,7/21,7/22,11/18,  # Copyright Michigan State University Board of Trustees
 # 2/8 Gerd Kortemeyer  #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   
   $|=1;
   use strict;
   
   use lib '/home/httpd/lib/perl/';
   use LONCAPA::Configuration;
   use Apache::lonnet;
   use Apache::loncommon;
   
 use IO::File;  use IO::File;
 use IO::Socket;  use IO::Socket;
   use HTML::Entities;
   use Getopt::Long;
   #globals
   use vars qw (%perlvar %simplestatus $errors $warnings $notices $totalcount);
   
   my $statusdir="/home/httpd/html/lon-status";
   
 # -------------------------------------------------- Non-critical communication  
 sub reply {  
     my ($cmd,$server)=@_;  
     my $peerfile="$perlvar{'lonSockDir'}/$server";  
     my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",  
                                      Type    => SOCK_STREAM,  
                                      Timeout => 10)  
        or return "con_lost";  
     print $client "$cmd\n";  
     my $answer=<$client>;  
     chomp($answer);  
     if (!$answer) { $answer="con_lost"; }  
     return $answer;  
 }  
   
 # --------------------------------------------------------- Output error status  # --------------------------------------------------------- Output error status
   
   sub log {
       my $fh=shift;
       if ($fh) { print $fh @_  }
   }
   
 sub errout {  sub errout {
    my $fh=shift;     my $fh=shift;
    print $fh (<<ENDERROUT);     &log($fh,(<<ENDERROUT));
      <p><table border=2 bgcolor="#CCCCCC">       <table border="2" bgcolor="#CCCCCC">
      <tr><td>Notices</td><td>$notices</td></tr>       <tr><td>Notices</td><td>$notices</td></tr>
      <tr><td>Warnings</td><td>$warnings</td></tr>       <tr><td>Warnings</td><td>$warnings</td></tr>
      <tr><td>Errors</td><td>$errors</td></tr>       <tr><td>Errors</td><td>$errors</td></tr>
      </table><p><a href="#top">Top</a><p>       </table><p><a href="#top">Top</a></p>
 ENDERROUT  ENDERROUT
 }  }
   
 # ================================================================ Main Program  sub rotate_logfile {
       my ($file,$fh,$description) = @_;
       my $size=(stat($file))[7];
       if ($size>40000) {
    &log($fh,"<p>Rotating $description ...</p>");
    rename("$file.2","$file.3");
    rename("$file.1","$file.2");
    rename("$file","$file.1");
       } 
   }
   
   sub start_daemon {
       my ($fh,$daemon,$pidfile,$args) = @_;
       my $progname=$daemon;
       if ($daemon eq 'lonc') {
    $progname='loncnew'; 
       }
       my $error_fname="$perlvar{'lonDaemons'}/logs/${daemon}_errors";
       &rotate_logfile($error_fname,$fh,'error logs');
       if ($daemon eq 'lonc') {
    &clean_sockets($fh);
       }
       system("$perlvar{'lonDaemons'}/$progname 2>$perlvar{'lonDaemons'}/logs/${daemon}_errors");
       sleep 1;
       if (-e $pidfile) {
    &log($fh,"<p>Seems like it started ...</p>");
    my $lfh=IO::File->new("$pidfile");
    my $daemonpid=<$lfh>;
    chomp($daemonpid);
    if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
       return 1;
    } else {
       return 0;
    }
       }
       &log($fh,"<p>Seems like that did not work!</p>");
       $errors++;
       return 0;
   }
   
   sub checkon_daemon {
       my ($fh,$daemon,$maxsize,$send,$args)=@_;
   
 # ------------------------------------------------------------ Read access.conf      my $result;
 {      &log($fh,'<hr /><a name="'.$daemon.'" /><h2>'.$daemon.'</h2><h3>Log</h3><p style="white-space: pre;"><tt>');
     my $config=IO::File->new("/etc/httpd/conf/access.conf");      printf("%-15s ",$daemon);
       if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
     while (my $configline=<$config>) {   open (DFH,"tail -n25 $perlvar{'lonDaemons'}/logs/$daemon.log|");
         if ($configline =~ /PerlSetVar/) {   while (my $line=<DFH>) { 
    my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);      &log($fh,"$line");
            $perlvar{$varname}=$varvalue;      if ($line=~/INFO/) { $notices++; }
         }      if ($line=~/WARNING/) { $notices++; }
       if ($line=~/CRITICAL/) { $warnings++; }
    };
    close (DFH);
       }
       &log($fh,"</tt></p>");
       
       my $pidfile="$perlvar{'lonDaemons'}/logs/$daemon.pid";
       
       my $restartflag=1;
       my $daemonpid;
       if (-e $pidfile) {
    my $lfh=IO::File->new("$pidfile");
    $daemonpid=<$lfh>;
    chomp($daemonpid);
    if ($daemonpid =~ /^\d+$/ && kill 0 => $daemonpid) {
       &log($fh,"<h3>$daemon at pid $daemonpid responding");
       if ($send) { &log($fh,", sending $send"); }
       &log($fh,"</h3>");
       if ($send eq 'USR1') { kill USR1 => $daemonpid; }
       if ($send eq 'USR2') { kill USR2 => $daemonpid; }
       $restartflag=0;
       if ($send eq 'USR2') {
    $result = 'reloaded';
    print "reloaded\n";
       } else {
    $result = 'running';
    print "running\n";
       }
    } else {
       $errors++;
       &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
       $restartflag=1;
       &log($fh,"<h3>Decided to clean up stale .pid file and restart $daemon</h3>");
    }
     }      }
       if ($restartflag==1) {
    $simplestatus{$daemon}='off';
    $errors++;
    my $kadaemon=$daemon;
    if ($kadaemon eq 'lonmemcached') { $kadaemon='memcached'; }
    &log($fh,'<br><font color="red">Killall '.$daemon.': '.
       `killall $kadaemon 2>&1`.' - ');
    sleep 1;
    &log($fh,unlink($pidfile).' - '.
       `killall -9 $kadaemon 2>&1`.
       '</font><br>');
    &log($fh,"<h3>$daemon not running, trying to start</h3>");
   
    if (&start_daemon($fh,$daemon,$pidfile,$args)) {
       &log($fh,"<h3>$daemon at pid $daemonpid responding</h3>");
       $simplestatus{$daemon}='restarted';
       $result = 'started';
       print "started\n";
    } else {
       $errors++;
       &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
       &log($fh,"<p>Give it one more try ...</p>");
       print " ";
       if (&start_daemon($fh,$daemon,$pidfile,$args)) {
    &log($fh,"<h3>$daemon at pid $daemonpid responding</h3>");
    $simplestatus{$daemon}='restarted';
    $result = 'started';
    print "started\n";
       } else {
    $result = 'failed';
    print " failed\n";
    $simplestatus{$daemon}='failed';
    $errors++; $errors++;
    &log($fh,"<h3>$daemon at pid $daemonpid not responding</h3>");
    &log($fh,"<p>Unable to start $daemon</p>");
       }
    }
   
    if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
       &log($fh,"<p><pre>");
       open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/$daemon.log|");
       while (my $line=<DFH>) { 
    &log($fh,"$line");
    if ($line=~/WARNING/) { $notices++; }
    if ($line=~/CRITICAL/) { $notices++; }
       };
       close (DFH);
       &log($fh,"</pre></p>");
    }
       }
       
       my $fname="$perlvar{'lonDaemons'}/logs/$daemon.log";
       &rotate_logfile($fname,$fh,'logs');
   
       &errout($fh);
       return $result;
 }  }
   
 # ------------------------------------------------------------- Read hosts file  # --------------------------------------------------------------------- Machine
 {  sub log_machine_info {
     my $config=IO::File->new("$perlvar{'lonTabDir'}/hosts.tab");      my ($fh)=@_;
       &log($fh,'<hr /><a name="machine" /><h2>Machine Information</h2>');
     while (my $configline=<$config>) {      &log($fh,"<h3>loadavg</h3>");
        my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);  
        $hostname{$id}=$name;      open (LOADAVGH,"/proc/loadavg");
        $hostdom{$id}=$domain;      my $loadavg=<LOADAVGH>;
        $hostrole{$id}=$role;      close (LOADAVGH);
        $hostip{$id}=$ip;      
        if (($role eq 'library') && ($id ne $perlvar{'lonHostID'})) {      &log($fh,"<tt>$loadavg</tt>");
    $libserv{$id}=$name;      
        }      my @parts=split(/\s+/,$loadavg);
       if ($parts[1]>4.0) {
    $errors++;
       } elsif ($parts[1]>2.0) {
    $warnings++;
       } elsif ($parts[1]>1.0) {
    $notices++;
     }      }
 }  
   
 # ------------------------------------------------------ Read spare server file      &log($fh,"<h3>df</h3>");
 {      &log($fh,"<pre>");
     my $config=IO::File->new("$perlvar{'lonTabDir'}/spare.tab");  
       open (DFH,"df|");
     while (my $configline=<$config>) {      while (my $line=<DFH>) { 
        chomp($configline);   &log($fh,&encode_entities($line,'<>&"')); 
        if (($configline) && ($configline ne $perlvar{'lonHostID'})) {   @parts=split(/\s+/,$line);
           $spareid{$configline}=1;   my $usage=$parts[4];
        }   $usage=~s/\W//g;
    if ($usage>90) { 
       $warnings++;
       $notices++; 
    } elsif ($usage>80) {
       $warnings++;
    } elsif ($usage>60) {
       $notices++;
    }
    if ($usage>95) { $warnings++; $warnings++; $simplestatus{'diskfull'}++; }
     }      }
 }      close (DFH);
       &log($fh,"</pre>");
   
 # ---------------------------------------------------------------- Start report  
   
 $statusdir="/home/httpd/html/lon-status";      &log($fh,"<h3>ps</h3>");
       &log($fh,"<pre>");
       my $psproc=0;
   
 $errors=0;      open (PSH,"ps aux --cols 140 |");
 $warnings=0;      while (my $line=<PSH>) { 
 $notices=0;   &log($fh,&encode_entities($line,'<>&"')); 
    $psproc++;
       }
       close (PSH);
       &log($fh,"</pre>");
   
       if ($psproc>200) { $notices++; }
       if ($psproc>250) { $notices++; }
   
 $now=time;      &log($fh,"<h3>distprobe</h3>");
 $date=localtime($now);      &log($fh,"<pre>");
       open(DSH,"$perlvar{'lonDaemons'}/distprobe |");
       while (my $line=<DSH>) { 
    &log($fh,&encode_entities($line,'<>&"')); 
    $psproc++;
       }
       close(DSH);
       &log($fh,"</pre>");
   
       &errout($fh);
   }
   
 {  sub start_logging {
 my $fh=IO::File->new(">$statusdir/newstatus.html");      my $fh=IO::File->new(">$statusdir/newstatus.html");
       my %simplestatus=();
       my $now=time;
       my $date=localtime($now);
       
   
 print $fh (<<ENDHEADERS);      &log($fh,(<<ENDHEADERS));
 <html>  <html>
 <head>  <head>
 <title>LON Status Report $perlvar{'lonHostID'}</title>  <title>LON Status Report $perlvar{'lonHostID'}</title>
 </head>  </head>
 <body bgcolor="#AAAAAA">  <body bgcolor="#AAAAAA">
 <a name="top">  <a name="top" />
 <h1>LON Status Report $perlvar{'lonHostID'}</h1>  <h1>LON Status Report $perlvar{'lonHostID'}</h1>
 <h2>$date ($now)</h2>  <h2>$date ($now)</h2>
 <ol>  <ol>
 <li><a href="#configuration">Configuration</a>  <li><a href="#configuration">Configuration</a></li>
 <li><a href="#machine">Machine Information</a>  <li><a href="#machine">Machine Information</a></li>
 <li><a href="#httpd">httpd</a>  <li><a href="#tmp">Temporary Files</a></li>
 <li><a href="#lond">lond</a>  <li><a href="#tokens">Session Tokens</a></li>
 <li><a href="#lonc">lonc</a>  <li><a href="#httpd">httpd</a></li>
 <li><a href="#lonnet">lonnet</a>  <li><a href="#lonsql">lonsql</a></li>
 <li><a href="#connections">Connections</a>  <li><a href="#lond">lond</a></li>
 <li><a href="#delayed">Delayed Messages</a>  <li><a href="#lonc">lonc</a></li>
 <li><a href="#errcount">Error Count</a>  <li><a href="#lonnet">lonnet</a></li>
   <li><a href="#connections">Connections</a></li>
   <li><a href="#delayed">Delayed Messages</a></li>
   <li><a href="#errcount">Error Count</a></li>
 </ol>  </ol>
 <hr>  <hr />
 <a name="configuration">  <a name="configuration" />
 <h2>Configuration</h2>  <h2>Configuration</h2>
 <h3>PerlVars</h3>  <h3>PerlVars</h3>
 <table border=2>  <table border="2">
 ENDHEADERS  ENDHEADERS
   
 foreach $varname (keys %perlvar) {      foreach my $varname (sort(keys(%perlvar))) {
     print $fh "<tr><td>$varname</td><td>$perlvar{$varname}</td></tr>\n";   &log($fh,"<tr><td>$varname</td><td>".
 }       &encode_entities($perlvar{$varname},'<>&"')."</td></tr>\n");
 print $fh "</table><h3>Hosts</h3><table border=2>";      }
 foreach $id (keys %hostname) {      &log($fh,"</table><h3>Hosts</h3><table border='2'>");
 print $fh       my %hostname = &Apache::lonnet::all_hostnames();
     "<tr><td>$id</td><td>$hostdom{$id}</td><td>$hostrole{$id}</td>";      foreach my $id (sort(keys(%hostname))) {
 print $fh "<td>$hostname{$id}</td><td>$hostip{$id}</td></tr>\n";   my $role = (&Apache::lonnet::is_library($id) ? 'library'
 }                                       : 'access');
 print $fh "</table><h3>Spare Hosts</h3><ol>";   &log($fh,
 foreach $id (keys %spareid) {      "<tr><td>$id</td><td>".&Apache::lonnet::host_domain($id).
     print $fh "<li>$id\n";      "</td><td>".$role.
       "</td><td>".&Apache::lonnet::hostname($id)."</td></tr>\n");
       }
       &log($fh,"</table><h3>Spare Hosts</h3><ul>");
       foreach my $type (sort(keys(%Apache::lonnet::spareid))) {
    &log($fh,"<li>$type\n<ol>");
    foreach my $id (@{ $Apache::lonnet::spareid{$type} }) {
       &log($fh,"<li>$id</li>\n");
    }
    &log($fh,"</ol>\n</li>\n");
       }
       &log($fh,"</ul>\n");
       return $fh;
 }  }
   
 print $fh "</ol>\n";  # --------------------------------------------------------------- clean out tmp
   sub clean_tmp {
 # --------------------------------------------------------------------- Machine      my ($fh)=@_;
       &log($fh,'<hr /><a name="tmp" /><h2>Temporary Files</h2>');
       my $cleaned=0;
       my $old=0;
       while (my $fname=<$perlvar{'lonDaemons'}/tmp/*>) {
    my ($dev,$ino,$mode,$nlink,
       $uid,$gid,$rdev,$size,
       $atime,$mtime,$ctime,
       $blksize,$blocks)=stat($fname);
    my $now=time;
    my $since=$now-$mtime;
    if ($since>$perlvar{'lonExpire'}) {
       my $line='';
       if (open(PROBE,$fname)) {
    $line=<PROBE>;
    close(PROBE);
       }
       unless ($line=~/^CHECKOUTTOKEN\&/) {
    $cleaned++;
    unlink("$fname");
       } else {
    if ($since>365*$perlvar{'lonExpire'}) {
       $cleaned++;
       unlink("$fname");
    } else { $old++; }
       }
    }
       }
       &log($fh,"Cleaned up ".$cleaned." files (".$old." old checkout tokens).");
   }
   
 print $fh '<hr><a name="machine"><h2>Machine Information</h2>';  # ------------------------------------------------------------ clean out lonIDs
 print $fh "<h3>loadavg</h3>";  sub clean_lonIDs {
       my ($fh)=@_;
       &log($fh,'<hr /><a name="tokens" /><h2>Session Tokens</h2>');
       my $cleaned=0;
       my $active=0;
       while (my $fname=<$perlvar{'lonIDsDir'}/*>) {
    my ($dev,$ino,$mode,$nlink,
       $uid,$gid,$rdev,$size,
       $atime,$mtime,$ctime,
       $blksize,$blocks)=stat($fname);
    my $now=time;
    my $since=$now-$mtime;
    if ($since>$perlvar{'lonExpire'}) {
       $cleaned++;
       &log($fh,"Unlinking $fname<br>");
       unlink("$fname");
    } else {
       $active++;
    }
       }
       &log($fh,"<p>Cleaned up ".$cleaned." stale session token(s).</p>");
       &log($fh,"<h3>$active open session(s)</h3>");
   }
   
 open (LOADAVGH,"/proc/loadavg");  # ----------------------------------------------------------- clean out sockets
 $loadavg=<LOADAVGH>;  sub clean_sockets {
 close (LOADAVGH);      my ($fh)=@_;
       my $cleaned=0;
       opendir(SOCKETS,$perlvar{'lonSockDir'});
       while (my $fname=readdir(SOCKETS)) {
    next if (-d $fname 
    || $fname=~/(mysqlsock|maximasock|\Q$perlvar{'lonSockDir'}\E)/);
    $cleaned++;
    &log($fh,"Unlinking $fname<br />");
    unlink("/home/httpd/sockets/$fname");
       }
       &log($fh,"<p>Cleaned up ".$cleaned." stale sockets.</p>");
   }
   
 print $fh "<tt>$loadavg</tt>";  
   
 @parts=split(/\s+/,$loadavg);  
 if ($parts[1]>3.0) {  
     $errors++;  
 } elsif ($parts[1]>2.0) {  
     $warnings++;  
 } elsif ($parts[1]>1.0) {  
     $notices++;  
 }  
   
 print $fh "<h3>df</h3>";  
 print $fh "<pre>";  
   
 open (DFH,"df|");  
 while ($line=<DFH>) {   
    print $fh "$line";   
    @parts=split(/\s+/,$line);  
    $usage=$parts[4];  
    $usage=~s/\W//g;  
    if ($usage>90) {   
       $errors++;   
    } elsif ($usage>80) {  
       $warnings++;  
    } elsif ($usage>60) {  
       $notices++;  
    }  
    if ($usage>95) { $errors++; }  
 }  
 close (DFH);  
 print $fh "</pre>";  
 &errout($fh);  
 # ----------------------------------------------------------------------- httpd  # ----------------------------------------------------------------------- httpd
   sub check_httpd_logs {
 print $fh '<hr><a name="httpd"><h2>httpd</h2><h3>Access Log</h3><pre>';      my ($fh)=@_;
       &log($fh,'<hr /><a name="httpd" /><h2>httpd</h2><h3>Access Log</h3><pre>');
 open (DFH,"tail -n40 /etc/httpd/logs/access_log|");      
 while ($line=<DFH>) { print $fh "$line" };      open (DFH,"tail -n25 /etc/httpd/logs/access_log|");
 close (DFH);      while (my $line=<DFH>) { &log($fh,&encode_entities($line,'<>&"')) };
   
 print $fh "</pre><h3>Error Log</h3><pre>";  
   
 open (DFH,"tail -n50 /etc/httpd/logs/error_log|");  
 while ($line=<DFH>) {   
    print $fh "$line";  
    if ($line=~/\[error\]/) { $notices++; }   
 };  
 close (DFH);  
 print $fh "</pre>";  
 &errout($fh);  
 # ------------------------------------------------------------------------ lond  
   
 print $fh '<hr><a name="lond"><h2>lond</h2><h3>Log</h3><pre>';  
   
 if (-e "$perlvar{'lonDaemons'}/logs/lond.log"){  
 open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/lond.log|");  
 while ($line=<DFH>) {   
    print $fh "$line";  
    if ($line=~/INFO/) { $notices++; }  
    if ($line=~/WARNING/) { $warnings++; }  
    if ($line=~/CRITICAL/) { $errors++; }  
 };  
 close (DFH);  
 }  
 print $fh "</pre>";  
   
 my $londfile="$perlvar{'lonDaemons'}/logs/lond.pid";  
   
 if (-e $londfile) {  
    my $lfh=IO::File->new("$londfile");  
    my $londpid=<$lfh>;  
    chomp($londpid);  
    if (kill 0 => $londpid) {  
       print $fh "<h3>lond at pid $londpid responding</h3>";  
    } else {  
       $errors++; $errors++;  
       print $fh "<h3>lond at pid $londpid not responding</h3>";  
    }  
 } else {  
    $errors++;  
    print $fh "<h3>lond not running, trying to start</h3>";  
    system("$perlvar{'lonDaemons'}/lond");  
    sleep 120;  
    if (-e $londfile) {  
        print $fh "Seems like it started ...<p>";  
        my $lfh=IO::File->new("$londfile");  
        my $londpid=<$lfh>;  
        chomp($londpid);  
        sleep 30;  
        if (kill 0 => $londpid) {  
           print $fh "<h3>lond at pid $londpid responding</h3>";  
        } else {  
           $errors++; $errors++;  
           print $fh "<h3>lond at pid $londpid not responding</h3>";  
           print $fh "Give it one more try ...<p>";  
           system("$perlvar{'lonDaemons'}/lond");  
           sleep 120;  
        }  
    } else {  
        print $fh "Seems like that did not work!<p>";  
        $errors++;  
    }  
    if (-e "$perlvar{'lonDaemons'}/logs/lond.log"){  
     print $fh "<p><pre>";  
     open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/lond.log|");  
     while ($line=<DFH>) {   
       print $fh "$line";  
       if ($line=~/INFO/) { $notices++; }  
       if ($line=~/WARNING/) { $warnings++; }  
       if ($line=~/CRITICAL/) { $errors++; }  
     };  
     close (DFH);      close (DFH);
     print $fh "</pre>";  
    }      &log($fh,"</pre><h3>Error Log</h3><pre>");
   
       open (DFH,"tail -n25 /etc/httpd/logs/error_log|");
       while (my $line=<DFH>) { 
    &log($fh,"$line");
    if ($line=~/\[error\]/) { $notices++; } 
       }
       close (DFH);
       &log($fh,"</pre>");
       &errout($fh);
 }  }
   
 $fname="$perlvar{'lonDaemons'}/logs/lond.log";  # ---------------------------------------------------------------------- lonnet
   
                           my ($dev,$ino,$mode,$nlink,  sub rotate_lonnet_logs {
                               $uid,$gid,$rdev,$size,      my ($fh)=@_;
                               $atime,$mtime,$ctime,      &log($fh,'<hr /><a name="lonnet" /><h2>lonnet</h2><h3>Temp Log</h3><pre>');
                               $blksize,$blocks)=stat($fname);      print "checking logs\n";
       if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){
 if ($size>40000) {   open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");
     print $fh "Rotating logs ...<p>";   while (my $line=<DFH>) { 
     rename("$fname.2","$fname.3");      &log($fh,&encode_entities($line,'<>&"'));
     rename("$fname.1","$fname.2");   }
     rename("$fname","$fname.1");   close (DFH);
 }      }
       &log($fh,"</pre><h3>Perm Log</h3><pre>");
 &errout($fh);      
 # ------------------------------------------------------------------------ lonc      if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
    open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");
 print $fh '<hr><a name="lonc"><h2>lonc</h2><h3>Log</h3><pre>';   while (my $line=<DFH>) { 
       &log($fh,&encode_entities($line,'<>&"'));
 if (-e "$perlvar{'lonDaemons'}/logs/lonc.log"){   }
 open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/lonc.log|");   close (DFH);
 while ($line=<DFH>) {       } else { &log($fh,"No perm log\n") }
    print $fh "$line";  
    if ($line=~/INFO/) { $notices++; }      my $fname="$perlvar{'lonDaemons'}/logs/lonnet.log";
    if ($line=~/WARNING/) { $warnings++; }      &rotate_logfile($fname,$fh,'lonnet log');
    if ($line=~/CRITICAL/) { $errors++; }  
 };      &log($fh,"</pre>");
 close (DFH);      &errout($fh);
 }  }
 print $fh "</pre>";  
   sub rotate_other_logs {
 my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";      my ($fh) = @_;
       my $fname="$perlvar{'lonDaemons'}/logs/autoenroll.log";
 if (-e $loncfile) {      &rotate_logfile($fname,$fh,'Auto Enroll log');
    my $lfh=IO::File->new("$loncfile");      $fname="$perlvar{'lonDaemons'}/logs/autocreate.log";
    my $loncpid=<$lfh>;      &rotate_logfile($fname,$fh,'Create Course log');
    chomp($loncpid);      $fname="$perlvar{'lonDaemons'}/logs/searchcat.log";
    if (kill 0 => $loncpid) {      &rotate_logfile($fname,$fh,'Search Cataloguing log');
       print $fh "<h3>lonc at pid $loncpid responding, sending USR1</h3>";  
       kill USR1 => $loncpid;  
    } else {  
       $errors++; $errors++;  
       print $fh "<h3>lonc at pid $loncpid not responding</h3>";  
    }  
 } else {  
    $errors++;  
    print $fh "<h3>lonc not running, trying to start</h3>";  
    system("$perlvar{'lonDaemons'}/lonc");  
    sleep 120;  
    if (-e $loncfile) {  
        print $fh "Seems like it started ...<p>";  
        my $lfh=IO::File->new("$loncfile");  
        my $loncpid=<$lfh>;  
        chomp($loncpid);  
        sleep 30;  
        if (kill 0 => $loncpid) {  
           print $fh "<h3>lonc at pid $loncpid responding</h3>";  
        } else {  
           $errors++; $errors++;  
           print $fh "<h3>lonc at pid $loncpid not responding</h3>";  
           print $fh "Give it one more try ...<p>";  
           system("$perlvar{'lonDaemons'}/lonc");  
           sleep 120;  
        }  
    } else {  
        print $fh "Seems like that did not work!<p>";  
        $errors++;  
    }  
    if (-e "$perlvar{'lonDaemons'}/logs/lonc.log") {  
     print $fh "<p><pre>";  
     open (DFH,"tail -n100 $perlvar{'lonDaemons'}/logs/lonc.log|");  
     while ($line=<DFH>) {   
       print $fh "$line";  
       if ($line=~/INFO/) { $notices++; }  
       if ($line=~/WARNING/) { $warnings++; }  
       if ($line=~/CRITICAL/) { $errors++; }  
     };  
     close (DFH);  
     print $fh "</pre>";  
    }  
 }  }
   
 $fname="$perlvar{'lonDaemons'}/logs/lonc.log";  # ----------------------------------------------------------------- Connections
   sub test_connections {
       my ($fh)=@_;
       &log($fh,'<hr /><a name="connections" /><h2>Connections</h2>');
       print "testing connections\n";
       &log($fh,"<table border='2'>");
       my ($good,$bad)=(0,0);
       my %hostname = &Apache::lonnet::all_hostnames();
       foreach my $tryserver (sort(keys(%hostname))) {
    print(".");
    my $result;
    my $answer=&Apache::lonnet::reply("ping",$tryserver);
    if ($answer eq "$tryserver:$perlvar{'lonHostID'}") {
       $result="<b>ok</b>";
       $good++;
    } else {
       $result=$answer;
       $warnings++;
       if ($answer eq 'con_lost') {
    $bad++;
    $warnings++;
       } else {
    $good++; #self connection
       }
    }
    if ($answer =~ /con_lost/) { print(" $tryserver down\n"); }
    &log($fh,"<tr><td>$tryserver</td><td>$result</td></tr>\n");
       }
       &log($fh,"</table>");
       print "\n$good good, $bad bad connections\n";
       &errout($fh);
   }
   
                           my ($dev,$ino,$mode,$nlink,  
                               $uid,$gid,$rdev,$size,  
                               $atime,$mtime,$ctime,  
                               $blksize,$blocks)=stat($fname);  
   
 if ($size>40000) {  # ------------------------------------------------------------ Delayed messages
     print $fh "Rotating logs ...<p>";  sub check_delayed_msg {
     rename("$fname.2","$fname.3");      my ($fh)=@_;
     rename("$fname.1","$fname.2");      &log($fh,'<hr /><a name="delayed" /><h2>Delayed Messages</h2>');
     rename("$fname","$fname.1");      print "checking buffers\n";
 }      
       &log($fh,'<h3>Scanning Permanent Log</h3>');
   
          my $unsend=0;
 &errout($fh);  
 # ---------------------------------------------------------------------- lonnet  
   
 print $fh '<hr><a name="lonnet"><h2>lonnet</h2><h3>Temp Log</h3><pre>';      my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log");
 if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){      while (my $line=<$dfh>) {
 open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");   my ($time,$sdf,$dserv,$dcmd)=split(/:/,$line);
 while ($line=<DFH>) {    if ($sdf eq 'F') { 
     print $fh "$line";      my $local=localtime($time);
 };      &log($fh,"<b>Failed: $time, $dserv, $dcmd</b><br>");
 close (DFH);      $warnings++;
 }   }
 print $fh "</pre><h3>Perm Log</h3>";   if ($sdf eq 'S') { $unsend--; }
    if ($sdf eq 'D') { $unsend++; }
 if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {      }
     open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");  
 while ($line=<DFH>) {   
    print $fh "$line";  
 };  
 close (DFH);  
 } else { print $fh "No perm log\n" }  
   
 $fname="$perlvar{'lonDaemons'}/logs/lonnet.log";  
   
                           my ($dev,$ino,$mode,$nlink,  
                               $uid,$gid,$rdev,$size,  
                               $atime,$mtime,$ctime,  
                               $blksize,$blocks)=stat($fname);  
   
 if ($size>40000) {  
     print $fh "Rotating logs ...<p>";  
     rename("$fname.2","$fname.3");  
     rename("$fname.1","$fname.2");  
     rename("$fname","$fname.1");  
 }  
   
 print $fh "</pre>";      &log($fh,"<p>Total unsend messages: <b>$unsend</b></p>\n");
 &errout($fh);      $warnings=$warnings+5*$unsend;
 # ----------------------------------------------------------------- Connections  
   
 print $fh '<hr><a name="connections"><h2>Connections</h2>';      if ($unsend) { $simplestatus{'unsend'}=$unsend; }
       &log($fh,"<h3>Outgoing Buffer</h3>\n<pre>");
   # list directory with delayed messages and remember offline servers
       my %servers=();
       open (DFH,"ls -lF $perlvar{'lonSockDir'}/delayed|");
       while (my $line=<DFH>) {
           my ($server)=($line=~/\.(\w+)$/);
           if ($server) { $servers{$server}=1; }
    &log($fh,&encode_entities($line,'<>&"'));
       }
       &log($fh,"</pre>\n");
       close (DFH);
   # pong to all servers that have delayed messages
   # this will trigger a reverse connection, which should flush the buffers
       foreach my $tryserver (keys %servers) {
    my $answer=&Apache::lonnet::reply("pong",$tryserver);
    &log($fh,"Pong to $tryserver: $answer<br />");
       }
   }
   
 print $fh "<table border=2>";  sub finish_logging {
 foreach $tryserver (keys %hostname) {      my ($fh)=@_;
       &log($fh,"<a name='errcount' />\n");
       $totalcount=$notices+4*$warnings+100*$errors;
       &errout($fh);
       &log($fh,"<h1>Total Error Count: $totalcount</h1>");
       my $now=time;
       my $date=localtime($now);
       &log($fh,"<hr />$date ($now)</body></html>\n");
       print "lon-status webpage updated\n";
       $fh->close();
   
       if ($errors) { $simplestatus{'errors'}=$errors; }
       if ($warnings) { $simplestatus{'warnings'}=$warnings; }
       if ($notices) { $simplestatus{'notices'}=$notices; }
       $simplestatus{'time'}=time;
   }
   
   sub log_simplestatus {
       rename("$statusdir/newstatus.html","$statusdir/index.html");
       
       my $sfh=IO::File->new(">$statusdir/loncron_simple.txt");
       foreach (keys %simplestatus) {
    print $sfh $_.'='.$simplestatus{$_}.'&';
       }
       print $sfh "\n";
       $sfh->close();
   }
   
     $answer=reply("pong",$tryserver);  sub send_mail {
     if ($answer eq "$tryserver:$perlvar{'lonHostID'}") {      print "sending mail\n";
  $result="<b>ok</b>";      my $defdom = $perlvar{'lonDefDomain'};
     } else {      my $origmail = $perlvar{'lonAdmEMail'};
         $result=$answer;      my $emailto = &Apache::loncommon::build_recipient_list(undef,
         $warnings++;                                     'lonstatusmail',$defdom,$origmail);
         if ($answer eq 'con_lost') { $warnings++; }      if ($totalcount>2500) {
    $emailto.=",$perlvar{'lonSysEMail'}";
     }      }
     print $fh "<tr><td>$tryserver</td><td>$result</td></tr>\n";      my $subj="LON: $perlvar{'lonHostID'} E:$errors W:$warnings N:$notices"; 
   
       my $result=system("metasend -b -S 4000000 -t $emailto -s '$subj' -f $statusdir/index.html -m text/html >& /dev/null");
       if ($result != 0) {
    $result=system("mail -s '$subj' $emailto < $statusdir/index.html");
       }
 }  }
 print $fh "</table>";  
   
 &errout($fh);  sub usage {
 # ------------------------------------------------------------ Delayed messages      print(<<USAGE);
   loncron - housekeeping program that checks up on various parts of Lon-CAPA
   
   Options:
      --help     Display 
      --noemail  Do not send the status email
      --justcheckconnections  Only check the current status of the lonc/d
                                   connections, do not send emails do not
                                   check if the daemons are running, do not
                                   generate lon-status
      --justcheckdaemons      Only check that all of the Lon-CAPA daemons are
                                   running, do not send emails do not
                                   check the lonc/d connections, do not
                                   generate lon-status
      --justreload            Only tell the daemons to reload the config files,
    do not send emails do not
                                   check if the daemons are running, do not
                                   generate lon-status
                              
   USAGE
   }
   
 print $fh '<hr><a name="delayed"><h2>Delayed Messages</h2>';  # ================================================================ Main Program
   sub main () {
       my ($help,$justcheckdaemons,$noemail,$justcheckconnections,
    $justreload);
       &GetOptions("help"                 => \$help,
    "justcheckdaemons"     => \$justcheckdaemons,
    "noemail"              => \$noemail,
    "justcheckconnections" => \$justcheckconnections,
    "justreload"           => \$justreload
    );
       if ($help) { &usage(); return; }
   # --------------------------------- Read loncapa_apache.conf and loncapa.conf
       my $perlvarref=LONCAPA::Configuration::read_conf('loncapa.conf');
       %perlvar=%{$perlvarref};
       undef $perlvarref;
       delete $perlvar{'lonReceipt'}; # remove since sensitive and not needed
       delete $perlvar{'lonSqlAccess'}; # remove since sensitive and not needed
       chdir($perlvar{'lonDaemons'});
   # --------------------------------------- Make sure that LON-CAPA is configured
   # I only test for one thing here (lonHostID).  This is just a safeguard.
       if ('{[[[[lonHostID]]]]}' eq $perlvar{'lonHostID'}) {
    print("Unconfigured machine.\n");
    my $emailto=$perlvar{'lonSysEMail'};
    my $hostname=`/bin/hostname`;
    chop $hostname;
    $hostname=~s/[^\w\.]//g; # make sure is safe to pass through shell
    my $subj="LON: Unconfigured machine $hostname";
    system("echo 'Unconfigured machine $hostname.' |\
    mailto $emailto -s '$subj' > /dev/null");
    exit 1;
       }
   
 print $fh '<h3>Scanning Permanent Log</h3>';  # ----------------------------- Make sure this process is running from user=www
       my $wwwid=getpwnam('www');
       if ($wwwid!=$<) {
    print("User ID mismatch.  This program must be run as user 'www'\n");
    my $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";
    my $subj="LON: $perlvar{'lonHostID'} User ID mismatch";
    system("echo 'User ID mismatch.  loncron must be run as user www.' |\
    mailto $emailto -s '$subj' > /dev/null");
    exit 1;
       }
   
 $unsend=0;  # -------------------------------------------- Force reload of host information
 {      &Apache::lonnet::load_hosts_tab(1);
     my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log");      &Apache::lonnet::load_domain_tab(1);
     while ($line=<$dfh>) {      &Apache::lonnet::get_iphost(1);
  ($time,$sdf,$dserv,$dcmd)=split(/:/,$line);  
         if ($sdf eq 'F') {   
     $local=localtime($time);  
             print "<b>Failed: $time, $dserv, $dcmd</b><br>";  
             $warnings++;  
         }  
         if ($sdf eq 'S') { $unsend--; }  
         if ($sdf eq 'D') { $unsend++; }  
     }  
 }  
 print $fh "Total unsend messages: <b>$unsend</b><p>\n";  
 $warnings=$warnings+5*$unsend;  
   
 print $fh "<h3>Outgoing Buffer</h3>";  
   
 open (DFH,"ls -lF $perlvar{'lonSockDir'}/delayed|");  
 while ($line=<DFH>) {   
     print $fh "$line<br>";  
 };  
 close (DFH);  
   
 # ------------------------------------------------------------------------- End  
 print $fh "<a name=errcount>\n";  
 $totalcount=$notices+4*$warnings+100*$errors;  
 &errout($fh);  
 print $fh "<h1>Total Error Count: $totalcount</h1>";  
 $now=time;  
 $date=localtime($now);  
 print $fh "<hr>$date ($now)</body></html>\n";  
   
 }  # ---------------------------------------------------------------- Start report
   
 rename ("$statusdir/newstatus.html","$statusdir/index.html");      $errors=0;
       $warnings=0;
 if ($totalcount>200) {      $notices=0;
    $emailto="$perlvar{'lonAdmEMail'},$perlvar{'lonSysEMail'}";  
    $subj="LON: $perlvar{'lonHostID'} E:$errors W:$warnings N:$notices";   
    system(      my $fh;
  "metasend -b -t $emailto -s '$subj' -f $statusdir/index.html -m text/html");      if (!$justcheckdaemons && !$justcheckconnections && !$justreload) {
    $fh=&start_logging();
   
    &log_machine_info($fh);
    &clean_tmp($fh);
    &clean_lonIDs($fh);
    &check_httpd_logs($fh);
    &rotate_lonnet_logs($fh);
    &rotate_other_logs($fh);
       }
       if (!$justcheckconnections && !$justreload) {
    &checkon_daemon($fh,'lonmemcached',40000);
    &checkon_daemon($fh,'lonsql',200000);
    if ( &checkon_daemon($fh,'lond',40000,'USR1') eq 'running') {
       &checkon_daemon($fh,'lond',40000,'USR2');
    }
    &checkon_daemon($fh,'lonc',40000,'USR1');
           &checkon_daemon($fh,'lonmaxima',40000);
       }
       if ($justreload) {
    &checkon_daemon($fh,'lond',40000,'USR2');
    &checkon_daemon($fh,'lonc',40000,'USR2');
       }
       if ($justcheckconnections) {
    &test_connections($fh);
       }
       if (!$justcheckdaemons && !$justcheckconnections && !$justreload) {
    &check_delayed_msg($fh);
    &finish_logging($fh);
    &log_simplestatus();
   
    if ($totalcount>200 && !$noemail) { &send_mail(); }
       }
 }  }
   
   &main();
 1;  1;
   
   
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  Added in v.1.79

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