#!/usr/bin/perl
# Housekeeping program, started by cron, loncontrol and loncron.pl
#
# $Id: loncron,v 1.133 2024/07/28 23:49:32 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# 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 LONCAPA::Checksumming;
use LONCAPA;
use LONCAPA::LWPReq;
use Apache::lonnet;
use Apache::loncommon;
use IO::File;
use IO::Socket;
use HTML::Entities;
use Getopt::Long;
use GDBM_File qw(GDBM_READER);
use Storable qw(thaw);
use File::ReadBackwards;
use File::Copy;
use Sys::Hostname::FQDN();
#globals
use vars qw (%perlvar %simplestatus $errors $warnings $notices $totalcount);
my $statusdir="/home/httpd/html/lon-status";
# --------------------------------------------------------- Output error status
sub log {
my $fh=shift;
if ($fh) { print $fh @_ }
}
sub errout {
my $fh=shift;
&log($fh,(<<ENDERROUT));
<table border="2" bgcolor="#CCCCCC">
<tr><td>Notices</td><td>$notices</td></tr>
<tr><td>Warnings</td><td>$warnings</td></tr>
<tr><td>Errors</td><td>$errors</td></tr>
</table><p><a href="#top">Top</a></p>
ENDERROUT
}
sub rotate_logfile {
my ($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)=@_;
my $result;
&log($fh,'<hr /><a name="'.$daemon.'" /><h2>'.$daemon.'</h2><h3>Log</h3><p style="white-space: pre;"><tt>');
printf("%-15s ",$daemon);
if ($fh) {
if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
if (open(DFH,"tail -n25 $perlvar{'lonDaemons'}/logs/$daemon.log|")) {
while (my $line=<DFH>) {
&log($fh,"$line");
if ($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 $kadaemon 2>&1`.
'</font><br />');
if ($kadaemon eq 'loncnew') {
&clean_lonc_childpids();
}
&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 $daemon</p>");
}
}
if ($fh) {
if (-e "$perlvar{'lonDaemons'}/logs/$daemon.log"){
&log($fh,"<p><pre>");
if (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 $result;
}
# --------------------------------------------------------------------- Machine
sub log_machine_info {
my ($fh)=@_;
&log($fh,'<hr /><a name="machine" /><h2>Machine Information</h2>');
&log($fh,"<h3>loadavg</h3>");
my $cpucount;
if (open(PIPE,"lscpu |grep '^CPU(s)' 2>&1 |")) {
my $info = <PIPE>;
chomp($info);
($cpucount) = ($info =~ /^\QCPU(s):\E\s+(\d+)$/);
close(PIPE);
}
if (!$cpucount) {
$cpucount = 1;
}
my %loadtarget = (
error => 4.0*$cpucount,
warn => 2.0*$cpucount,
note => 1.0*$cpucount,
);
open (LOADAVGH,"/proc/loadavg");
my $loadavg=<LOADAVGH>;
close (LOADAVGH);
&log($fh,"<tt>$loadavg</tt>");
my @parts=split(/\s+/,$loadavg);
if ($parts[1]>$loadtarget{'error'}) {
$errors++;
} elsif ($parts[1]>$loadtarget{'warn'}) {
$warnings++;
} elsif ($parts[1]>$loadtarget{'note'}) {
$notices++;
}
&log($fh,"<h3>df</h3>");
&log($fh,"<pre>");
open (DFH,"df|");
while (my $line=<DFH>) {
&log($fh,&encode_entities($line,'<>&"'));
@parts=split(/\s+/,$line);
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>");
&log($fh,"<h3>ps</h3>");
&log($fh,"<pre>");
my $psproc=0;
open (PSH,"ps aux --cols 140 |");
while (my $line=<PSH>) {
&log($fh,&encode_entities($line,'<>&"'));
$psproc++;
}
close (PSH);
&log($fh,"</pre>");
if ($psproc>200) { $notices++; }
if ($psproc>250) { $notices++; }
&log($fh,"<h3>distprobe</h3>");
&log($fh,"<pre>");
&log($fh,&encode_entities(&LONCAPA::distro(),'<>&"'));
&log($fh,"</pre>");
&errout($fh);
}
sub start_logging {
my $fh=IO::File->new(">$statusdir/newstatus.html");
my %simplestatus=();
my $now=time;
my $date=localtime($now);
&log($fh,(<<ENDHEADERS));
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>LON Status Report $perlvar{'lonHostID'}</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
</head>
<body bgcolor="#AAAAAA">
<a name="top" />
<h1>LON Status Report $perlvar{'lonHostID'}</h1>
<h2>$date ($now)</h2>
<ol>
<li><a href="#configuration">Configuration</a></li>
<li><a href="#machine">Machine Information</a></li>
<li><a href="#tmp">Temporary Files</a></li>
<li><a href="#tokens">Session Tokens</a></li>
<li><a href="#webdav">WebDAV Session Tokens</a></li>
<li><a href="#httpd">httpd</a></li>
<li><a href="#lonsql">lonsql</a></li>
<li><a href="#lond">lond</a></li>
<li><a href="#lonc">lonc</a></li>
<li><a href="#lonnet">lonnet</a></li>
<li><a href="#connections">Connections</a></li>
<li><a href="#bashconf">bash readline config</a></li>
<li><a href="#delayed">Delayed Messages</a></li>
<li><a href="#errcount">Error Count</a></li>
</ol>
<hr />
<a name="configuration" />
<h2>Configuration</h2>
<h3>PerlVars</h3>
<table border="2">
ENDHEADERS
foreach my $varname (sort(keys(%perlvar))) {
&log($fh,"<tr><td>$varname</td><td>".
&encode_entities($perlvar{$varname},'<>&"')."</td></tr>\n");
}
&log($fh,"</table><h3>Hosts</h3><table border='2'>");
my %hostname = &Apache::lonnet::all_hostnames();
foreach my $id (sort(keys(%hostname))) {
my $role = (&Apache::lonnet::is_library($id) ? 'library'
: 'access');
&log($fh,
"<tr><td>$id</td><td>".&Apache::lonnet::host_domain($id).
"</td><td>".$role.
"</td><td>".&Apache::lonnet::hostname($id)."</td></tr>\n");
}
&log($fh,"</table><h3>Spare Hosts</h3>");
if (keys(%Apache::lonnet::spareid) > 0) {
&log($fh,"<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");
} else {
&log($fh,"No spare hosts specified<br />\n");
}
return $fh;
}
# --------------------------------------------------------------- clean out tmp
sub clean_tmp {
my ($fh)=@_;
&log($fh,'<hr /><a name="tmp" /><h2>Temporary Files</h2>');
my ($cleaned,$old,$removed) = (0,0,0);
my %errors = (
dir => [],
file => [],
failopen => [],
);
my %error_titles = (
dir => 'failed to remove empty directory:',
file => 'failed to unlike stale file',
failopen => 'failed to open file or directory'
);
($cleaned,$old,$removed) = &recursive_clean_tmp('',$cleaned,$old,$removed,\%errors);
&log($fh,"Cleaned up: ".$cleaned." files; removed: $removed empty directories; (found: $old old checkout tokens)");
foreach my $key (sort(keys(%errors))) {
if (ref($errors{$key}) eq 'ARRAY') {
if (@{$errors{$key}} > 0) {
&log($fh,"Error during cleanup ($error_titles{$key}):<ul><li>".
join('</li><li><tt>',@{$errors{$key}}).'</tt></li></ul><br />');
}
}
}
}
sub recursive_clean_tmp {
my ($subdir,$cleaned,$old,$removed,$errors) = @_;
my $base = "$perlvar{'lonDaemons'}/tmp";
my $path = $base;
next if ($subdir =~ m{\.\./});
next unless (ref($errors) eq 'HASH');
unless ($subdir eq '') {
$path .= '/'.$subdir;
}
if (opendir(my $dh,"$path")) {
while (my $file = readdir($dh)) {
next if ($file =~ /^\.\.?$/);
my $fname = "$path/$file";
if (-d $fname) {
my $innerdir;
if ($subdir eq '') {
$innerdir = $file;
} else {
$innerdir = $subdir.'/'.$file;
}
($cleaned,$old,$removed) =
&recursive_clean_tmp($innerdir,$cleaned,$old,$removed,$errors);
my @doms = &Apache::lonnet::current_machine_domains();
if (open(my $dirhandle,$fname)) {
unless (($innerdir eq 'helprequests') ||
(($innerdir =~ /^addcourse/) && ($innerdir !~ m{/\d+$}))) {
my @contents = grep {!/^\.\.?$/} readdir($dirhandle);
join('&&',@contents)."\n";
if (scalar(grep {!/^\.\.?$/} readdir($dirhandle)) == 0) {
closedir($dirhandle);
if ($fname =~ m{^\Q$perlvar{'lonDaemons'}\E/tmp/}) {
if (rmdir($fname)) {
$removed ++;
} elsif (ref($errors->{dir}) eq 'ARRAY') {
push(@{$errors->{dir}},$fname);
}
}
}
} else {
closedir($dirhandle);
}
}
} else {
my ($dev,$ino,$mode,$nlink,
$uid,$gid,$rdev,$size,
$atime,$mtime,$ctime,
$blksize,$blocks)=stat($fname);
my $now=time;
my $since=$now-$mtime;
if ($since>$perlvar{'lonExpire'}) {
if ($subdir eq '') {
my $line='';
if ($fname =~ /\.db$/) {
if (unlink($fname)) {
$cleaned++;
} elsif (ref($errors->{file}) eq 'ARRAY') {
push(@{$errors->{file}},$fname);
}
} elsif (open(PROBE,$fname)) {
my $line='';
$line=<PROBE>;
close(PROBE);
if ($line=~/^CHECKOUTTOKEN\&/) {
if ($since>365*$perlvar{'lonExpire'}) {
if (unlink($fname)) {
$cleaned++;
} elsif (ref($errors->{file}) eq 'ARRAY') {
push(@{$errors->{file}},$fname);
}
} else {
$old++;
}
} else {
if (unlink($fname)) {
$cleaned++;
} elsif (ref($errors->{file}) eq 'ARRAY') {
push(@{$errors->{file}},$fname);
}
}
} elsif (ref($errors->{failopen}) eq 'ARRAY') {
push(@{$errors->{failopen}},$fname);
}
} else {
if (unlink($fname)) {
$cleaned++;
} elsif (ref($errors->{file}) eq 'ARRAY') {
push(@{$errors->{file}},$fname);
}
}
}
}
}
closedir($dh);
} elsif (ref($errors->{failopen}) eq 'ARRAY') {
push(@{$errors->{failopen}},$path);
}
return ($cleaned,$old,$removed);
}
# ------------------------------------------------------------ clean out lonIDs
sub clean_lonIDs {
my ($fh)=@_;
&log($fh,'<hr /><a name="tokens" /><h2>Session Tokens</h2>');
my $cleaned=0;
my $active=0;
while (my $fname=<$perlvar{'lonIDsDir'}/*>) {
my $now=time;
if (-l $fname) {
my $linkfname = readlink($fname);
if (-f $linkfname) {
if ($linkfname =~ m{^$perlvar{'lonIDsDir'}/[^/]+\.id$}) {
my @data = stat($linkfname);
my $mtime = $data[9];
my $since=$now-$mtime;
if ($since>$perlvar{'lonExpire'}) {
if (unlink($linkfname)) {
$cleaned++;
&log($fh,"Unlinking $linkfname<br />");
unlink($fname);
}
}
}
} else {
unlink($fname);
}
} elsif (-f $fname) {
my @data = stat($fname);
my $mtime = $data[9];
my $since=$now-$mtime;
if ($since>$perlvar{'lonExpire'}) {
if (unlink($fname)) {
$cleaned++;
&log($fh,"Unlinking $fname<br />");
}
} else {
$active++;
}
}
}
&log($fh,"<p>Cleaned up ".$cleaned." stale session token(s).</p>");
&log($fh,"<h3>$active open session(s)</h3>");
}
# -------------------------------------------------------- clean out balanceIDs
sub clean_balanceIDs {
my ($fh)=@_;
&log($fh,'<hr /><a name="balcookies" /><h2>Session Tokens</h2>');
my $cleaned=0;
my $active=0;
if (-d $perlvar{'lonBalanceDir'}) {
while (my $fname=<$perlvar{'lonBalanceDir'}/*.id>) {
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 ".$cleaned." stale balancer files</p>");
&log($fh,"<h3>$active unexpired balancer files</h3>");
}
# ------------------------------------------------ clean out webDAV Session IDs
sub clean_webDAV_sessionIDs {
my ($fh)=@_;
if ($perlvar{'lonRole'} eq 'library') {
&log($fh,'<hr /><a name="webdav" /><h2>WebDAV Session Tokens</h2>');
my $cleaned=0;
my $active=0;
my $now = time;
if (-d $perlvar{'lonDAVsessDir'}) {
while (my $fname=<$perlvar{'lonDAVsessDir'}/*>) {
my @stats = stat($fname);
my $since=$now-$stats[9];
if ($since>$perlvar{'lonExpire'}) {
$cleaned++;
&log($fh,"Unlinking $fname<br />");
unlink("$fname");
} else {
$active++;
}
}
&log($fh,"<p>Cleaned up ".$cleaned." stale webDAV session token(s).</p>");
&log($fh,"<h3>$active open webDAV session(s)</h3>");
}
}
}
# ------------------------------------------------------------ clean out ltiIDs
sub clean_ltiIDs {
my ($fh)=@_;
&log($fh,'<hr /><a name="ltisessions" /><h2>LTI Session Pointers</h2>');
my $cleaned=0;
my $active=0;
if (-d $perlvar{'ltiIDsDir'}) {
while (my $fname=<$perlvar{'ltiIDsDir'}/*>) {
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 ".$cleaned." old LTI session pointers.</p>");
&log($fh,"<h3>$active unexpired LTI session pointers</h3>");
}
# ----------------------------------------------------------- clean out sockets
sub clean_sockets {
my ($fh)=@_;
my $cleaned=0;
opendir(SOCKETS,$perlvar{'lonSockDir'});
while (my $fname=readdir(SOCKETS)) {
next if (-d $fname
|| $fname=~/(mysqlsock|maximasock|rsock|\Q$perlvar{'lonSockDir'}\E)/);
$cleaned++;
&log($fh,"Unlinking $fname<br />");
unlink("/home/httpd/sockets/$fname");
}
&log($fh,"<p>Cleaned up ".$cleaned." stale sockets.</p>");
}
# ----------------------------------------------------------------------- httpd
sub check_httpd_logs {
my ($fh)=@_;
if (open(PIPE,"./lchttpdlogs|")) {
while (my $line=<PIPE>) {
&log($fh,$line);
if ($line=~/\[error\]/) { $notices++; }
}
close(PIPE);
}
&errout($fh);
}
# ---------------------------------------------------------------------- lonnet
sub rotate_lonnet_logs {
my ($fh)=@_;
&log($fh,'<hr /><a name="lonnet" /><h2>lonnet</h2><h3>Temp Log</h3><pre>');
print "Checking logs.\n";
if (-e "$perlvar{'lonDaemons'}/logs/lonnet.log"){
open (DFH,"tail -n50 $perlvar{'lonDaemons'}/logs/lonnet.log|");
while (my $line=<DFH>) {
&log($fh,&encode_entities($line,'<>&"'));
}
close (DFH);
}
&log($fh,"</pre><h3>Perm Log</h3><pre>");
if (-e "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
open(DFH,"tail -n10 $perlvar{'lonDaemons'}/logs/lonnet.perm.log|");
while (my $line=<DFH>) {
&log($fh,&encode_entities($line,'<>&"'));
}
close (DFH);
} else { &log($fh,"No perm log\n") }
my $fname="$perlvar{'lonDaemons'}/logs/lonnet.log";
&rotate_logfile($fname,$fh,'lonnet log');
&log($fh,"</pre>");
&errout($fh);
}
sub rotate_other_logs {
my ($fh) = @_;
my %logs = (
autoenroll => 'Auto Enroll log',
autocreate => 'Create Course log',
searchcat => 'Search Cataloguing log',
autoupdate => 'Auto Update log',
refreshcourseids_db => 'Refresh CourseIDs db log',
);
foreach my $item (keys(%logs)) {
my $fname=$perlvar{'lonDaemons'}.'/logs/'.$item.'.log';
&rotate_logfile($fname,$fh,$logs{$item});
}
}
# ----------------------------------------------------------------- Connections
sub test_connections {
my ($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);
}
# ------------------------------------------------------------ Delayed messages
sub check_delayed_msg {
my ($fh,$weightsref,$exclusionsref)=@_;
&log($fh,'<hr /><a name="delayed" /><h2>Delayed Messages</h2>');
print "Checking buffers.\n";
&log($fh,'<h3>Scanning Permanent Log</h3>');
my $unsend=0;
my $ignored=0;
my %hostname = &Apache::lonnet::all_hostnames();
my $numhosts = scalar(keys(%hostname));
my $checkbackwards = 0;
my $checkfrom = 0;
my $checkexcluded = 0;
my (%bymachine,%weights,%exclusions,%serverhomes);
if (ref($weightsref) eq 'HASH') {
%weights = %{$weightsref};
}
if (ref($exclusionsref) eq 'HASH') {
%exclusions = %{$exclusionsref};
if (keys(%exclusions)) {
$checkexcluded = 1;
%serverhomes = &read_serverhomeIDs();
}
}
#
# For LON-CAPA 1.2.0 to 2.1.3 (release dates: 8/31/2004 and 3/31/2006) any
# entry logged in lonnet.perm.log for completion of a delayed (critical)
# transaction lacked the hostID for the remote node to which the command
# to be completed was sent.
#
# Because of this, exclusion of items in lonnet.perm.log for nodes which are
# no longer part of the cluster from adding to the overall "unsend" count
# needs additional effort besides the changes made in loncron rev. 1.105.
#
# For "S" (completion) events logging in LON-CAPA 1.2.0 through 2.1.3 included
# "LondTransaction=HASH(hexadecimal)->getClient() :$cmd, where the hexadecimal
# is a memory location, and $cmd is the command sent to the remote node.
#
# Starting with 2.2.0 (released 8/21/2006) logging for "S" (completion) events
# had sethost:$host_id:$cmd after LondTransaction=HASH(hexadecimal)->getClient()
#
# Starting with 2.4.1 (released 6/13/2007) logging for "S" replaced echoing the
# getClient() call with the result of the Transaction->getClient() call itself
# undef for completion of delivery of a delayed message.
#
# The net effect of these changes is that lonnet.perm.log is now accessed three
# times: (a) oldest record is checked, if earlier than release date for 2.5.0
# then (b) file is read backwards, with timestamp recorded for most recent
# instance of logged "S" event for "update" command without "sethost:$host_id:"
# then (c) file is read forward with records ignored which predate the timestamp
# recorded in (b), if one was found.
#
# In (c), when calculating the unsend total, i.e., the difference between delayed
# transactions ("D") and sent transactions ("S"), transactions are ignored if the
# target node is no longer in the cluster, and also (for "update" commands), if
# the target node is in the list of nodes excluded from the count, in the domain
# configuration for this machine's default domain. The idea here is to remove
# delayed "update" commands for nodes for which inbound access to port 5663,
# is blocked, but are still part of the LON-CAPA network, (i.e., they can still
# replicate content from other nodes).
#
my $dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log","r");
if (defined($dfh)) {
while (my $line=<$dfh>) {
my ($time,$sdf,$rest)=split(/:/,$line,3);
if ($time < 1541185772) {
$checkbackwards = 1;
}
last;
}
undef $dfh;
}
if ($checkbackwards) {
if (tie *BW, 'File::ReadBackwards', "$perlvar{'lonDaemons'}/logs/lonnet.perm.log") {
while(my $line=<BW>) {
if ($line =~ /\QLondTransaction=HASH\E[^:]+:update:/) {
($checkfrom) = split(/:/,$line,2);
last;
}
}
close(BW);
}
}
$dfh=IO::File->new("$perlvar{'lonDaemons'}/logs/lonnet.perm.log","r");
if (defined($dfh)) {
while (my $line=<$dfh>) {
my ($time,$sdf,$rest)=split(/:/,$line,3);
next unless (($sdf eq 'F') || ($sdf eq 'S') || ($sdf eq 'D'));
next if (($checkfrom) && ($time <= $checkfrom));
my ($dserv,$dcmd);
if ($sdf eq 'S') {
my ($serva,$cmda,$servb,$cmdb) = split(/:/,$rest);
if ($cmda eq 'sethost') {
chomp($cmdb);
$dcmd = $cmdb;
} else {
$dcmd = $cmda;
}
if (($serva =~ /^LondTransaction/) || ($serva eq '')) {
unless (($servb eq '') || ($servb =~ m{^/})) {
$dserv = $servb;
}
} else {
$dserv = $serva;
}
} else {
($dserv,$dcmd) = split(/:/,$rest);
}
if ($sdf eq 'F') {
my $local=localtime($time);
&log($fh,"<b>Failed: $time, $dserv, $dcmd</b><br />");
$warnings++;
}
next if ((($dserv eq '') || ($dcmd eq '')) && ($sdf ne 'F'));
if ($sdf eq 'S') {
if ($dcmd eq 'update') {
if ($hostname{$dserv}) {
if ($exclusions{$serverhomes{$hostname{$dserv}}}) {
$ignored --;
} else {
$unsend --;
}
}
if (exists($bymachine{$dserv})) {
$bymachine{$dserv} --;
} else {
$bymachine{$dserv} = -1;
}
} else {
if ($hostname{$dserv}) {
$unsend --;
}
}
} elsif ($sdf eq 'D') {
if ($dcmd eq 'update') {
if ($hostname{$dserv}) {
if ($exclusions{$serverhomes{$hostname{$dserv}}}) {
$ignored ++;
} else {
$unsend ++;
}
}
if (exists($bymachine{$dserv})) {
$bymachine{$dserv} ++;
} else {
$bymachine{$dserv} = 1;
}
} else {
if ($hostname{$dserv}) {
$unsend ++;
}
}
}
}
undef $dfh;
my $nodest = 0;
my $retired = 0;
my %active;
if (keys(%bymachine)) {
unless ($checkexcluded) {
%serverhomes = &read_serverhomeIDs();
}
foreach my $key (keys(%bymachine)) {
if ($bymachine{$key} > 0) {
if ($hostname{$key}) {
$active{$serverhomes{$hostname{$key}}} += $bymachine{$key};
} else {
$retired ++;
$nodest += $bymachine{$key};
}
}
}
}
if (keys(%active)) {
&log($fh,"<p>Unsend messages by node, active (undegraded) nodes in cluster</p>\n");
foreach my $key (sort(keys(%active))) {
&log($fh,&encode_entities("$key => $active{$key}",'<>&"')."\n");
}
}
&log($fh,"<p>Total unsend messages: <b>$unsend</b> for ".scalar(keys(%active))." active (undegraded) nodes in cluster.</p>\n");
if (keys(%exclusions) > 0) {
&log($fh,"<p>Total incomplete updates <b>$ignored</b> for ".scalar(keys(%exclusions))." degraded nodes in cluster.</p>\n");
}
if ($retired) {
&log($fh,"<p>Total unsent <b>$nodest</b> for $retired nodes no longer in cluster.</p>\n");
}
if ($unsend > 0) {
$warnings=$warnings+$weights{'U'}*$unsend;
}
}
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 $tryserver (sort(keys(%servers))) {
if ($hostname{$tryserver} || !$numhosts) {
my $answer;
eval {
local $SIG{ ALRM } = sub { die "TIMEOUT" };
alarm(20);
$answer = &Apache::lonnet::reply("pong",$tryserver);
alarm(0);
};
if ($@ && $@ =~ m/TIMEOUT/) {
&log($fh,"Attempted pong to $tryserver timed out<br />");
print "Time out while contacting: $tryserver for pong.\n";
} else {
&log($fh,"Pong to $tryserver: $answer<br />");
}
} else {
&log($fh,"$tryserver has delayed messages, but is not part of the cluster -- skipping 'Pong'.<br />");
}
}
}
sub finish_logging {
my ($fh,$weightsref)=@_;
my %weights;
if (ref($weightsref) eq 'HASH') {
%weights = %{$weightsref};
}
&log($fh,"<a name='errcount' />\n");
$totalcount=($weights{'N'}*$notices)+($weights{'W'}*$warnings)+($weights{'E'}*$errors);
&errout($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();
}
sub write_loncaparevs {
print "Retrieving LON-CAPA version information.\n";
my %hostname = &Apache::lonnet::all_hostnames();
my $output;
foreach my $id (sort(keys(%hostname))) {
if ($id ne '') {
my $loncaparev;
eval {
local $SIG{ ALRM } = sub { die "TIMEOUT" };
alarm(10);
$loncaparev =
&Apache::lonnet::get_server_loncaparev('',$id,1,'loncron');
alarm(0);
};
if ($@ && $@ =~ m/TIMEOUT/) {
print "Time out while contacting lonHost: $id for version.\n";
}
if ($loncaparev =~ /^[\w.\-]+$/) {
$output .= $id.':'.$loncaparev."\n";
}
}
}
if ($output) {
if (open(my $fh,">$perlvar{'lonTabDir'}/loncaparevs.tab")) {
print $fh $output;
close($fh);
&Apache::lonnet::load_loncaparevs();
}
}
return;
}
sub write_serverhomeIDs {
print "Retrieving LON-CAPA lonHostID information.\n";
my %name_to_host = &Apache::lonnet::all_names();
my $output;
foreach my $name (sort(keys(%name_to_host))) {
if ($name ne '') {
if (ref($name_to_host{$name}) eq 'ARRAY') {
my $serverhomeID;
eval {
local $SIG{ ALRM } = sub { die "TIMEOUT" };
alarm(10);
$serverhomeID =
&Apache::lonnet::get_server_homeID($name,1,'loncron');
alarm(0);
};
if ($@ && $@ =~ m/TIMEOUT/) {
print "Time out while contacting server: $name\n";
}
if ($serverhomeID ne '') {
$output .= $name.':'.$serverhomeID."\n";
} else {
$output .= $name.':'.$name_to_host{$name}->[0]."\n";
}
}
}
}
if ($output) {
if (open(my $fh,">$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
print $fh $output;
close($fh);
&Apache::lonnet::load_serverhomeIDs();
}
}
return;
}
sub write_checksums {
my $distro = &LONCAPA::distro();
if ($distro) {
print "Retrieving file version and checksumming.\n";
my $numchksums = 0;
my ($chksumsref,$versionsref) =
&LONCAPA::Checksumming::get_checksums($distro,$perlvar{'lonDaemons'},
$perlvar{'lonLib'},
$perlvar{'lonIncludes'},
$perlvar{'lonTabDir'});
if (ref($chksumsref) eq 'HASH') {
$numchksums = scalar(keys(%{$chksumsref}));
}
print "File version retrieved and checksumming completed for $numchksums files.\n";
} else {
print "File version retrieval and checksumming skipped - could not determine Linux distro.\n";
}
return;
}
sub write_hostips {
my $lontabdir = $perlvar{'lonTabDir'};
my $defdom = $perlvar{'lonDefDomain'};
my $lonhost = $perlvar{'lonHostID'};
my $newfile = "$lontabdir/currhostips.tab";
my $oldfile = "$lontabdir/prevhostips.tab";
my (%prevhosts,%currhosts,%ipchange);
if ((-e $newfile) && (-s $newfile)) {
move($newfile,$oldfile);
chmod(0644,$oldfile);
if (open(my $fh,'<',$oldfile)) {
while (my $line=<$fh>) {
chomp($line);
if ($line =~ /^([^:]+):([\d.]+)$/) {
$prevhosts{$1} = $2;
}
}
close($fh);
}
}
my ($ip_info,$cached) =
&Apache::lonnet::is_cached_new('iphost','iphost');
if (!$cached) {
&Apache::lonnet::get_iphost();
($ip_info,$cached) =
&Apache::lonnet::is_cached_new('iphost','iphost');
}
if (ref($ip_info) eq 'ARRAY') {
%currhosts = %{$ip_info->[1]};
if (open(my $fh,'>',$newfile)) {
foreach my $key (keys(%currhosts)) {
print $fh "$key:$currhosts{$key}\n";
}
close($fh);
chmod(0644,$newfile);
}
}
if (keys(%prevhosts) && keys(%currhosts)) {
foreach my $key (keys(%prevhosts)) {
unless ($currhosts{$key} eq $prevhosts{$key}) {
$ipchange{$key} = $prevhosts{$key}.' | '.$currhosts{$key};
}
}
foreach my $key (keys(%currhosts)) {
unless ($currhosts{$key} eq $prevhosts{$key}) {
$ipchange{$key} = $prevhosts{$key}.' | '.$currhosts{$key};
}
}
}
if (&Apache::lonnet::domain($defdom,'primary') eq $lonhost) {
if (keys(%ipchange)) {
if (open(my $fh,'>>',$perlvar{'lonDaemons'}.'/logs/hostip.log')) {
print $fh "********************\n".localtime(time).' Changes --'."\n".
"| Hostname | Previous IP | New IP |\n".
" --------------------------------- \n";
foreach my $hostname (sort(keys(%ipchange))) {
print $fh "| $hostname | $ipchange{$hostname} |\n";
}
print $fh "\n*******************\n\n";
close($fh);
}
my $emailto = &Apache::loncommon::build_recipient_list(undef,
'hostipmail',$defdom);
if ($emailto) {
my $subject = "LON-CAPA Hostname to IP change ($perlvar{'lonHostID'})";
my $chgmail = "To: $emailto\n".
"Subject: $subject\n".
"Content-type: text/plain\; charset=UTF-8\n".
"MIME-Version: 1.0\n\n".
"Host/IP changes\n".
" \n".
"| Hostname | Previous IP | New IP |\n".
" --------------------------------- \n";
foreach my $hostname (sort(keys(%ipchange))) {
$chgmail .= "| $hostname | $ipchange{$hostname} |\n";
}
$chgmail .= "\n\n";
if (open(my $mailh, "|/usr/lib/sendmail -oi -t -odb")) {
print $mailh $chgmail;
close($mailh);
print "Sending mail notification of hostname/IP changes.\n";
}
}
}
}
return;
}
sub clean_nosslverify {
my ($fh) = @_;
my %unlinked;
if (-d "$perlvar{'lonSockDir'}/nosslverify") {
if (opendir(my $dh,"$perlvar{'lonSockDir'}/nosslverify")) {
while (my $fname=readdir($dh)) {
next if ($fname =~ /^\.+$/);
if (unlink("/home/httpd/sockets/nosslverify/$fname")) {
&log($fh,"Unlinking $fname<br />");
$unlinked{$fname} = 1;
}
}
closedir($dh);
}
}
&log($fh,"<p>Removed ".scalar(keys(%unlinked))." nosslverify clients</p>");
return %unlinked;
}
sub clean_lonc_childpids {
my $childpiddir = "$perlvar{'lonDocRoot'}/lon-status/loncchld";
if (-d $childpiddir) {
if (opendir(my $dh,$childpiddir)) {
while (my $fname=readdir($dh)) {
next if ($fname =~ /^\.+$/);
unlink("$childpiddir/$fname");
}
closedir($dh);
}
}
}
sub write_connection_config {
my ($domconf,%connectssl,%changes);
$domconf = &get_domain_config();
if (ref($domconf) eq 'HASH') {
if (ref($domconf->{'ssl'}) eq 'HASH') {
foreach my $connect ('connto','connfrom') {
if (ref($domconf->{'ssl'}->{$connect}) eq 'HASH') {
my ($sslreq,$sslnoreq,$currsetting);
my %contypes;
foreach my $type ('dom','intdom','other') {
$connectssl{$connect.'_'.$type} = $domconf->{'ssl'}->{$connect}->{$type};
}
}
}
}
if (keys(%connectssl)) {
my %currconf;
if (open(my $fh,'<',"$perlvar{'lonTabDir'}/connectionrules.tab")) {
while (my $line = <$fh>) {
chomp($line);
my ($name,$value) = split(/=/,$line);
if ($value =~ /^(?:no|yes|req)$/) {
if ($name =~ /^conn(to|from)_(dom|intdom|other)$/) {
$currconf{$name} = $value;
}
}
}
close($fh);
}
if (open(my $fh,'>',"$perlvar{'lonTabDir'}/connectionrules.tab")) {
my $count = 0;
foreach my $key (sort(keys(%connectssl))) {
print $fh "$key=$connectssl{$key}\n";
if (exists($currconf{$key})) {
unless ($currconf{$key} eq $connectssl{$key}) {
$changes{$key} = 1;
}
} else {
$changes{$key} = 1;
}
$count ++;
}
close($fh);
print "Completed writing SSL options for lonc/lond for $count items.\n";
}
} else {
print "Writing of SSL options skipped - no connection rules in domain configuration.\n";
}
} else {
print "Retrieval of SSL options for lonc/lond skipped - no configuration data available for domain.\n";
}
return %changes;
}
sub get_domain_config {
my ($dom,$primlibserv,$isprimary,$url,%confhash);
$dom = $perlvar{'lonDefDomain'};
$primlibserv = &Apache::lonnet::domain($dom,'primary');
if ($primlibserv eq $perlvar{'lonHostID'}) {
$isprimary = 1;
} elsif ($primlibserv ne '') {
my $protocol = $Apache::lonnet::protocol{$primlibserv};
my $hostname = &Apache::lonnet::hostname($primlibserv);
unless ($protocol eq 'https') {
$protocol = 'http';
}
$url = $protocol.'://'.$hostname.'/cgi-bin/listdomconfig.pl?primary='.$primlibserv.'&format=raw';
}
if ($isprimary) {
my $lonusersdir = $perlvar{'lonUsersDir'};
my $fname = $lonusersdir.'/'.$dom.'/configuration.db';
if (-e $fname) {
my $dbref=&LONCAPA::locking_hash_tie($fname,&GDBM_READER());
if (ref($dbref) eq 'HASH') {
foreach my $key (sort(keys(%{$dbref}))) {
my $value = $dbref->{$key};
if ($value =~ s/^__FROZEN__//) {
$value = thaw(&LONCAPA::unescape($value));
} else {
$value = &LONCAPA::unescape($value);
}
$confhash{$key} = $value;
}
&LONCAPA::locking_hash_untie($dbref);
}
}
} else {
my $request=new HTTP::Request('GET',$url);
my $response=&LONCAPA::LWPReq::makerequest($primlibserv,$request,'',\%perlvar,5);
unless ($response->is_error()) {
my $content = $response->content;
if ($content) {
my @pairs=split(/\&/,$content);
foreach my $item (@pairs) {
my ($key,$value)=split(/=/,$item,2);
my $what = &LONCAPA::unescape($key);
if ($value =~ s/^__FROZEN__//) {
$value = thaw(&LONCAPA::unescape($value));
} else {
$value = &LONCAPA::unescape($value);
}
$confhash{$what}=$value;
}
}
}
}
return \%confhash;
}
sub write_hosttypes {
my %intdom = &Apache::lonnet::all_host_intdom();
my %hostdom = &Apache::lonnet::all_host_domain();
my $dom = $hostdom{$perlvar{'lonHostID'}};
my $internetdom = $intdom{$perlvar{'lonHostID'}};
my %changes;
if (($dom ne '') && ($internetdom ne '')) {
if (keys(%hostdom)) {
my %currhosttypes;
if (open(my $fh,'<',"$perlvar{'lonTabDir'}/hosttypes.tab")) {
while (my $line = <$fh>) {
chomp($line);
my ($name,$value) = split(/:/,$line);
if (($name ne '') && ($value =~ /^(dom|intdom|other)$/)) {
$currhosttypes{$name} = $value;
}
}
close($fh);
}
if (open(my $fh,'>',"$perlvar{'lonTabDir'}/hosttypes.tab")) {
my $count = 0;
foreach my $lonid (sort(keys(%hostdom))) {
my $type = 'other';
if ($hostdom{$lonid} eq $dom) {
$type = 'dom';
} elsif ($intdom{$lonid} eq $internetdom) {
$type = 'intdom';
}
print $fh "$lonid:$type\n";
if (exists($currhosttypes{$lonid})) {
if ($type ne $currhosttypes{$lonid}) {
$changes{$lonid} = 1;
}
} else {
$changes{$lonid} = 1;
}
$count ++;
}
close($fh);
print "Completed writing host type data for $count hosts.\n";
}
} else {
print "Writing of host types skipped - no hosts found.\n";
}
} else {
print "Writing of host types skipped - could not determine this host's LON-CAPA domain or 'internet' domain.\n";
}
return %changes;
}
sub update_revocation_list {
my ($result,$changed) = &Apache::lonnet::fetch_crl_pemfile();
if ($result eq 'ok') {
print "Certificate Revocation List (from CA) updated.\n";
} else {
print "Certificate Revocation List from (CA) not updated.\n";
}
return $changed;
}
sub reset_nosslverify_pids {
my ($fh,%sslrem) = @_;
&checkon_daemon($fh,'lond',40000,'USR2');
my $loncpidfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
my $loncppid;
if ((-e $loncpidfile) && (open(my $pfh,'<',$loncpidfile))) {
$loncppid=<$pfh>;
chomp($loncppid);
close($pfh);
if ($loncppid =~ /^\d+$/) {
my %pids_by_host;
my $docdir = $perlvar{'lonDocRoot'};
if (-d "$docdir/lon-status/loncchld") {
if (opendir(my $dh,"$docdir/lon-status/loncchld")) {
while (my $file = readdir($dh)) {
next if ($file =~ /^\./);
if (open(my $fh,'<',"$docdir/lon-status/loncchld/$file")) {
my $record = <$fh>;
chomp($record);
close($fh);
my ($remotehost,$authmode) = split(/:/,$record);
$pids_by_host{$remotehost}{$authmode}{$file} = 1;
}
}
closedir($dh);
if (keys(%pids_by_host)) {
foreach my $host (keys(%pids_by_host)) {
if ($sslrem{$host}) {
if (ref($pids_by_host{$host}) eq 'HASH') {
if (ref($pids_by_host{$host}{'insecure'}) eq 'HASH') {
if (keys(%{$pids_by_host{$host}{'insecure'}})) {
foreach my $pid (keys(%{$pids_by_host{$host}{'insecure'}})) {
if (open(PIPE,"ps -o ppid= -p $pid |")) {
my $ppid = <PIPE>;
chomp($ppid);
close(PIPE);
$ppid =~ s/(^\s+|\s+$)//g;
if (($ppid == $loncppid) && (kill 0 => $pid)) {
kill QUIT => $pid;
}
}
}
}
}
}
}
}
}
}
}
}
}
return;
}
sub get_permcount_settings {
my ($domconf) = @_;
my ($defaults,$names) = &Apache::loncommon::lon_status_items();
my (%weights,$threshold,$sysmail,$reportstatus,%exclusions);
foreach my $type ('E','W','N','U') {
$weights{$type} = $defaults->{$type};
}
$threshold = $defaults->{'threshold'};
$sysmail = $defaults->{'sysmail'};
$reportstatus = 1;
if (ref($domconf) eq 'HASH') {
if (ref($domconf->{'contacts'}) eq 'HASH') {
if ($domconf->{'contacts'}{'reportstatus'} == 0) {
$reportstatus = 0;
}
if (ref($domconf->{'contacts'}{'lonstatus'}) eq 'HASH') {
if (ref($domconf->{'contacts'}{'lonstatus'}{weights}) eq 'HASH') {
foreach my $type ('E','W','N','U') {
if (exists($domconf->{'contacts'}{'lonstatus'}{weights}{$type})) {
$weights{$type} = $domconf->{'contacts'}{'lonstatus'}{weights}{$type};
}
}
}
if (ref($domconf->{'contacts'}{'lonstatus'}{'excluded'}) eq 'ARRAY') {
my @excluded = @{$domconf->{'contacts'}{'lonstatus'}{'excluded'}};
if (@excluded) {
map { $exclusions{$_} = 1; } @excluded;
}
}
if (exists($domconf->{'contacts'}{'lonstatus'}{'threshold'})) {
$threshold = $domconf->{'contacts'}{'lonstatus'}{'threshold'};
}
if (exists($domconf->{'contacts'}{'lonstatus'}{'sysmail'})) {
$sysmail = $domconf->{'contacts'}{'lonstatus'}{'sysmail'};
}
}
}
}
return ($threshold,$sysmail,$reportstatus,\%weights,\%exclusions);
}
sub read_serverhomeIDs {
my %server;
if (-e "$perlvar{'lonTabDir'}/serverhomeIDs.tab") {
if (open(my $fh,'<',"$perlvar{'lonTabDir'}/serverhomeIDs.tab")) {
while (<$fh>) {
my($host,$id) = split(/:/);
chomp($id);
$server{$host} = $id;
}
close($fh);
}
}
return %server;
}
sub check_bash_settings {
my $distro = &LONCAPA::distro();
my ($check_bracketed_paste,$bracketed_warning);
if ($distro =~ /^debian(\d+)$/) {
if ($1 >= 12) {
$check_bracketed_paste = 1;
}
} elsif ($distro =~ /^ubuntu(\d+)$/) {
if ($1 >= 22) {
$check_bracketed_paste = 1;
}
} elsif ($distro =~ /^(?:redhat|oracle|alma|rocky|centos-stream)(\d+)$/) {
if ($1 >= 9) {
$check_bracketed_paste = 1;
}
} elsif ($distro =~ /^fedora(\d+)/) {
if ($1 >= 34) {
$check_bracketed_paste = 1;
}
}
if ($check_bracketed_paste) {
if (open(PIPE,"bind -V 2>&1 | grep enable-bracketed-paste |")) {
my $info = <PIPE>;
chomp($info);
my ($bracketed) = ($info =~ /^\Qenable-bracketed-paste\E\s+is\s+set\s+to\s+\W(on|off)\W$/);
close(PIPE);
if ($bracketed eq 'on') {
$bracketed_warning = 1;
}
} else {
print "Unable to check if bracketed paste is set to off for www user's shell\n";
}
}
return ($bracketed_warning,$check_bracketed_paste);
}
sub set_bracketed_paste_off {
my $bash_www_cnf = '/home/www/.inputrc';
my $result;
if (!-e $bash_www_cnf) {
system("touch $bash_www_cnf");
if (open(my $cfh,'>',$bash_www_cnf)) {
print $cfh <<'END';
$if R
set enable-bracketed-paste off
$endif
$if maxima
set enable-bracketed-paste off
$endif
END
close($cfh);
$result = "Updated $bash_www_cnf so enable-bracketed-paste is off for R bash shell";
} else {
$result = "Could not open $bash_www_cnf to add 'set enable-bracketed-paste to off'";
}
my $wwwuid = getpwnam('www');
my $wwwgid = getgrnam('www');
if ($wwwuid!=$<) {
chown($wwwuid,$wwwgid,$bash_www_cnf);
}
} else {
my (%bracketed_paste_on,%bracketed_paste_off,@preserve,$condition);
$condition = '';
if (open(my $cfh,'<',$bash_www_cnf)) {
while (my $line=<$cfh>) {
chomp($line);
if ($line =~ /^\$if\s+(\w+)\s*$/) {
if ($1 eq 'R') {
$condition = 'r';
} elsif ($1 eq 'maxima') {
$condition = 'maxima';
} else {
$condition = 'other';
}
} elsif ($line =~ /^\$endif\s*$/) {
$condition = '';
}
if ($line =~ /^\s*set\s+enable\-bracketed\-paste\s+(off|on)\s*$/) {
if ($1 eq 'off') {
if ($condition ne '') {
$bracketed_paste_off{$condition} = 1;
} else {
$bracketed_paste_off{all} = 1;
}
push(@preserve,$line);
} else {
if ($condition ne '') {
$bracketed_paste_on{$condition} = 1;
if (($condition eq 'r') || ($condition eq 'maxima')) {
push(@preserve,' set enable-bracketed-paste off');
} else {
push(@preserve,$line);
}
} else {
$bracketed_paste_on{all} = 1;
push(@preserve,$line);
}
}
} else {
push(@preserve,$line);
}
}
close($cfh);
} else {
$result = "Could not open $bash_www_cnf to check if a value is included for 'enable-bracketed-paste'.";
}
if (($bracketed_paste_on{r} || $bracketed_paste_on{maxima}) ||
(!exists($bracketed_paste_off{r}) && !exists($bracketed_paste_on{r}) &&
!exists($bracketed_paste_off{maxima}) && !exists($bracketed_paste_on{maxima}))) {
if (open(my $cfh,'>',$bash_www_cnf)) {
if (@preserve) {
foreach my $entry (@preserve) {
print $cfh "$entry\n";
}
if (!exists($bracketed_paste_off{r}) && !exists($bracketed_paste_on{r})) {
print $cfh <<'END';
$if R
set enable-bracketed-paste off
$endif
END
}
if (!exists($bracketed_paste_off{r}) && !exists($bracketed_paste_on{r})) {
print $cfh <<'END';
$if maxima
set enable-bracketed-paste off
$endif
END
}
} else {
print $cfh <<'END';
$if R
set enable-bracketed-paste off
$endif
$if maxima
set enable-bracketed-paste off
$endif
END
}
close($cfh);
$result = "Updated $bash_www_cnf";
} else {
$result = "Could not open $bash_www_cnf to add 'set enable-bracketed-paste to off'";
}
} else {
$result = "No action needed; $bash_www_cnf already includes 'set enable-bracketed-paste to off'";
}
}
return $result;
}
sub send_mail {
my ($sysmail,$reportstatus) = @_;
my $defdom = $perlvar{'lonDefDomain'};
my $origmail = $perlvar{'lonAdmEMail'};
my $emailto = &Apache::loncommon::build_recipient_list(undef,
'lonstatusmail',$defdom,$origmail);
if (($totalcount>$sysmail) && ($reportstatus)) {
$emailto.=",$perlvar{'lonSysEMail'}";
}
my $from;
my $hostname=`/bin/hostname`;
chop($hostname);
$hostname=~s/[^\w\.]//g;
if ($hostname) {
$from = 'www@'.$hostname;
}
my $subj="LON: $perlvar{'lonHostID'} E:$errors W:$warnings N:$notices";
my $loncronmail = "To: $emailto\n".
"From: $from\n".
"Subject: ".$subj."\n".
"Content-type: text/html\; charset=UTF-8\n".
"MIME-Version: 1.0\n\n";
if (open(my $fh,"<$statusdir/index.html")) {
while (<$fh>) {
$loncronmail .= $_;
}
close($fh);
} else {
$loncronmail .= "Failed to read from http://$hostname/lon-status/index.html\n";
}
$loncronmail .= "\n\n";
if (open(my $mailh, "|/usr/lib/sendmail -oi -t -odb")) {
print $mailh $loncronmail;
close($mailh);
print "Sending mail.\n";
} else {
print "Sending mail failed.\n";
}
}
sub usage {
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
--justiptables Only update the dynamic iptables rules for the
lond port; do not send emails, do not
check if the daemons are running, do not
generate lon-status
USAGE
}
# ================================================================ Main Program
sub main () {
my ($help,$justcheckdaemons,$noemail,$justcheckconnections,
$justreload,$justiptables);
&GetOptions("help" => \$help,
"justcheckdaemons" => \$justcheckdaemons,
"noemail" => \$noemail,
"justcheckconnections" => \$justcheckconnections,
"justreload" => \$justreload,
"justiptables" => \$justiptables
);
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 = Sys::Hostname::FQDN::fqdn();
$hostname=~s/\.+/./g;
$hostname=~s/\-+/-/g;
$hostname=~s/[^\w\.-]//g; # make sure is safe to pass through shell
my $subj="LON: Unconfigured machine $hostname";
system("echo 'Unconfigured machine $hostname.' |".
" mail -s '$subj' $emailto > /dev/null");
exit 1;
}
# ----------------------------- 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: $perlvar{'lonHostID'} User ID mismatch";
system("echo 'User ID mismatch. loncron must be run as user www.' |".
" mail -s '$subj' $emailto > /dev/null");
exit 1;
}
# -------------------------------------------- Force reload of host information
my $nomemcache;
if ($justcheckdaemons) {
$nomemcache=1;
my $memcachepidfile="$perlvar{'lonDaemons'}/logs/memcached.pid";
my $memcachepid;
if (-e $memcachepidfile) {
my $memfh=IO::File->new($memcachepidfile);
$memcachepid=<$memfh>;
chomp($memcachepid);
if ($memcachepid =~ /^\d+$/ && kill 0 => $memcachepid) {
undef($nomemcache);
}
}
}
if (!$justiptables) {
&Apache::lonnet::load_hosts_tab(1,$nomemcache);
&Apache::lonnet::load_domain_tab(1,$nomemcache);
&Apache::lonnet::get_iphost(1,$nomemcache);
}
# ----------------------------------------- Force firewall update for lond port
if ((!$justcheckdaemons) && (!$justreload)) {
my $now = time;
my $tmpfile = $perlvar{'lonDaemons'}.'/tmp/lciptables_iphost_'.
$now.$$.int(rand(10000));
if (open(my $fh,">$tmpfile")) {
my %iphosts = &Apache::lonnet::get_iphost();
foreach my $key (keys(%iphosts)) {
print $fh "$key\n";
}
close($fh);
if (&LONCAPA::try_to_lock('/tmp/lock_lciptables')) {
my $execpath = $perlvar{'lonDaemons'}.'/lciptables';
system("$execpath $tmpfile");
unlink('/tmp/lock_lciptables'); # Remove the lock file.
}
unlink($tmpfile);
}
}
# ---------------------------------------------------------------- Start report
$errors=0;
$warnings=0;
$notices=0;
my $fh;
if (!$justcheckdaemons && !$justcheckconnections && !$justreload && !$justiptables) {
$fh=&start_logging();
&log_machine_info($fh);
&clean_tmp($fh);
&clean_lonIDs($fh);
&clean_balanceIDs($fh);
&clean_webDAV_sessionIDs($fh);
&clean_ltiIDs($fh);
&check_httpd_logs($fh);
&rotate_lonnet_logs($fh);
&rotate_other_logs($fh);
}
if (!$justcheckconnections && !$justreload && !$justiptables) {
&checkon_daemon($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($fh,'lonmaxima',40000);
&checkon_daemon($fh,'lonr',40000);
}
if ($justreload) {
&clean_nosslverify($fh);
&write_connection_config();
&write_hosttypes();
&update_revocation_list();
&checkon_daemon($fh,'lond',40000,'USR2');
&checkon_daemon($fh,'lonc',40000,'USR2');
}
if ($justcheckconnections) {
&test_connections($fh);
}
if (!$justcheckdaemons && !$justcheckconnections && !$justreload && !$justiptables) {
my ($bracketed_warning,$check_bracketed_paste) = &check_bash_settings();
if ($check_bracketed_paste) {
&log($fh,'<hr /><a name="bashconf" /><h2>bash readline config</h2><h3>Bracketed Paste</h3>'.
'<p>Distros using bash readline library 8.1 or later need bracketed paste disabled for the R bash shell for the www user so R commands sent to lonr daemon will be processed.</p>');
my $bash_www_cnf = '/home/www/.inputrc';
my $non_empty_conffile;
unless ($bracketed_warning) {
if (-e $bash_www_cnf) {
my $filesize = (stat($bash_www_cnf))[7];
if ($filesize > 0) {
$non_empty_conffile = 1;
}
}
}
if (($bracketed_warning) || ($non_empty_conffile)) {
my $bash_update = &set_bracketed_paste_off();
if ($bash_update) {
&log($fh,'<p>'.$bash_update.'</p>'."\n");
}
} else {
&log($fh,'<p>No action needed; /home/www/.inputrc already set.</p>'."\n");
}
} else {
&log($fh,'<hr /><a name="bashconf" /><h2>bash readline config</h2><h3>Bracketed Paste</h3>'.
'<p>No action needed for distros using pre-8.1 bash readline library</p>'."\n");
}
my $domconf = &get_domain_config();
my ($threshold,$sysmail,$reportstatus,$weightsref,$exclusionsref) =
&get_permcount_settings($domconf);
&check_delayed_msg($fh,$weightsref,$exclusionsref);
&write_loncaparevs();
&write_serverhomeIDs();
&write_checksums();
&write_hostips();
my %sslrem = &clean_nosslverify($fh);
my %conchgs = &write_connection_config();
my %hosttypechgs = &write_hosttypes();
my $hadcrlchg = &update_revocation_list();
if ((keys(%conchgs) > 0) || (keys(%hosttypechgs) > 0) ||
$hadcrlchg || (keys(%sslrem) > 0)) {
&checkon_daemon($fh,'lond',40000,'USR2');
&reset_nosslverify_pids($fh,%sslrem);
}
&finish_logging($fh,$weightsref);
&log_simplestatus();
if ($totalcount>$threshold && !$noemail) { &send_mail($sysmail,$reportstatus); }
}
}
&main();
1;
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