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- loncontrol restart now echoes loncron by closing port 5663 for IP
  addresses no longer in the cluster, and opens port 5663 for IP
  addresses of servers added to cluster since loncron last ran.

    1: #!/usr/bin/perl
    2: #
    3: # $Id: loncontrol,v 1.43 2011/05/15 01:10:02 raeburn Exp $
    4: #
    5: # The LearningOnline Network with CAPA
    6: #
    7: # Copyright Michigan State University Board of Trustees
    8: #
    9: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   10: #
   11: # LON-CAPA is free software; you can redistribute it and/or modify
   12: # it under the terms of the GNU General Public License as published by
   13: # the Free Software Foundation; either version 2 of the License, or
   14: # (at your option) any later version.
   15: #
   16: # LON-CAPA is distributed in the hope that it will be useful,
   17: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   18: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   19: # GNU General Public License for more details.
   20: #
   21: # You should have received a copy of the GNU General Public License
   22: # along with LON-CAPA; if not, write to the Free Software
   23: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   24: #
   25: # /home/httpd/html/adm/gpl.txt
   26: #
   27: # http://www.lon-capa.org/
   28: #
   29: # Startup script for the LON-CAPA network processes
   30: #
   31: 
   32: # chkconfig: 345 95 5
   33: # description: LON-CAPA is a "network of knowledge".  It is used to \
   34: # distribute knowledge resources and instructional management.
   35: # processnames: lonc, lond, lonsql, lonmaxima, lonr
   36: # pidfiles: /home/httpd/perl/logs/lon*.pid
   37: # config: /etc/httpd/conf/loncapa.conf
   38: # config: /home/httpd/lonTabs/hosts.tab
   39: # config: /home/httpd/lonTabs/spare.tab
   40: # SuSE chkconfig/insserv info
   41: ### BEGIN INIT INFO
   42: # Provides:       loncapa
   43: # Required-Start: SuSEfirewall2_setup mysql apache2 $network $remote_fs
   44: # Should-Start:   $ALL
   45: # Required-Stop:
   46: # Default-Start:  3 5
   47: # Default-Stop:
   48: # Description:    Starts the LON-CAPA services
   49: ### END INIT INFO
   50: 
   51: use strict;
   52: use lib '/home/httpd/lib/perl/';
   53: use LONCAPA::Configuration;
   54: use LONCAPA::Firewall;
   55: use Apache::lonnet;
   56: 
   57: my $command=$ARGV[0]; $command=~s/[^a-z]//g;
   58: 
   59: $ENV{'PATH'}="/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin";
   60: $ENV{'BASH_ENV'}="";
   61: 
   62: sub stop_daemon {
   63:     my ($daemon,$killallname)=@_;
   64:     my $pidfile="/home/httpd/perl/logs/$daemon.pid";
   65:     
   66:     printf("%-15s ",$daemon);
   67:     if (-e $pidfile) {
   68: 	open(PIDFILE,$pidfile);
   69: 	my $daemonpid=<PIDFILE>;
   70: 	chomp($daemonpid);
   71: 	kill TERM => $daemonpid;
   72: 	my $count=0;
   73: 	while ($count++ < 5 && kill(0 => $daemonpid)) {
   74: 	    sleep 1;
   75: 	}
   76: 	if (kill 0 => $daemonpid) {
   77: 	    kill KILL => $daemonpid;
   78: 	    sleep 1;
   79: 	    if (kill 0 => $daemonpid) {
   80: 		print("failed to kill");
   81: 	    } else {
   82: 		print("killed");
   83: 	    }
   84: 	} else {
   85: 	    print("stopped");
   86: 	}
   87:     } else {
   88: 	print("not running");
   89:     }
   90:     system("killall -q -0 $killallname");
   91:     if ($? == 0) {
   92: 	system("killall -q $killallname");
   93: 	print(", killed off extraneous processes");
   94:     }
   95:     unlink($pidfile);
   96:     print("\n");
   97: }
   98: 
   99: sub clean_sockets {
  100:     opendir(SOCKETS,"/home/httpd/sockets/");
  101:     my $perlvarref=&LONCAPA::Configuration::read_conf();
  102:     return if (ref($perlvarref) ne 'HASH');
  103:     while (my $fname=readdir(SOCKETS)) {
  104: 	next if (-d $fname
  105: 		 || $fname=~/(mysqlsock|maximasock|\Q$perlvarref->{'lonSockDir'}\E)/);
  106: 	unlink("/home/httpd/sockets/$fname");
  107:     }
  108: }
  109: 
  110: if (($command eq "restart") || ($command eq 'stop') || 
  111:     ($command eq 'start') || ($command eq "status")) {
  112:     my $iptables = &LONCAPA::Firewall::get_pathto_iptables();
  113:     my @fw_chains = &LONCAPA::Firewall::get_fw_chains($iptables);
  114:     my $lond_port = &LONCAPA::Firewall::get_lond_port();
  115:     my %iphost;
  116:     if ($command eq 'restart') {
  117:         print 'Restarting LON-CAPA'."\n";
  118:         print 'Ending LON-CAPA client and daemon processes'."\n";
  119:         foreach my $daemon ('lonsql','lond','lonc','lonmemcached','lonmaxima','lonr') {
  120:             my $killallname=$daemon;
  121:             if ($daemon eq 'lonc') { $killallname='loncnew'; }
  122:             &stop_daemon($daemon,$killallname);
  123:         }
  124:         %iphost = &Apache::lonnet::get_iphost();
  125:         my $firewall_result =
  126:             &LONCAPA::Firewall::firewall_close_port($iptables,\@fw_chains,
  127:                                              $lond_port,\%iphost,[$lond_port]);
  128:         if ($firewall_result) {
  129:             print "$firewall_result\n";
  130:         }
  131:         $firewall_result =
  132:             &LONCAPA::Firewall::firewall_open_port($iptables,\@fw_chains,
  133:                                             $lond_port, \%iphost,[$lond_port]);
  134:         if (($firewall_result eq 'ok') || ($firewall_result eq 'inactive firewall')) {
  135:             if ($firewall_result eq 'inactive firewall') {
  136:                 print "WARNING: iptables firewall is currently inactive\n";
  137:             }
  138:         } elsif ($firewall_result) {
  139:             print "$firewall_result\n";
  140:         }
  141:         print 'Starting LON-CAPA client and daemon processes (please be patient)'.
  142:               "\n";
  143:         system("su www -c '/home/httpd/perl/loncron --justcheckdaemons'");
  144:     } elsif ($command eq 'stop') {
  145:         print 'Stopping LON-CAPA'."\n";
  146:         foreach my $daemon ('lonsql','lond','lonc','lonmemcached','lonmaxima','lonr') {
  147: 	    my $killallname=$daemon;
  148: 	    if ($daemon eq 'lonc') { $killallname='loncnew'; }
  149: 	    &stop_daemon($daemon,$killallname);
  150:         }
  151:         my $firewall_result = 
  152:             &LONCAPA::Firewall::firewall_close_port($iptables,\@fw_chains,$lond_port,\%iphost,[$lond_port]);
  153:         if ($firewall_result) {
  154:             print "$firewall_result\n";
  155:         }
  156:         &clean_sockets();
  157:     } elsif ($command eq "start") {
  158:         %iphost = &Apache::lonnet::get_iphost();
  159:         my $firewall_result = 
  160:             &LONCAPA::Firewall::firewall_open_port($iptables,\@fw_chains,$lond_port,\%iphost,[$lond_port]);
  161:         if (($firewall_result eq 'ok') || ($firewall_result eq 'inactive firewall')) {
  162:             if ($firewall_result eq 'inactive firewall') {
  163:                 print "WARNING: iptables firewall is currently inactive\n";
  164:             }
  165:             print 'Starting LON-CAPA'."\n";
  166:             print 'Starting LON-CAPA client and daemon processes (please be patient)'.
  167: 	          "\n";
  168:             system("su www -c '/home/httpd/perl/loncron --justcheckdaemons'");
  169:         } else {
  170:             print "Not starting LON-CAPA\n";
  171:             if ($firewall_result eq 'port number unknown') {
  172:                 print "Could not check for status of LON-CAPA port in running firewall - port number unknown.  \n";
  173:             } elsif ($firewall_result) {
  174:                 print "$firewall_result\n";
  175:             }
  176:         }
  177:     } elsif ($command eq "status") {
  178:         %iphost = &Apache::lonnet::get_iphost();
  179:         my $response=`/bin/cat /home/httpd/perl/logs/*.pid 2>&1`;
  180:         if ($response=~/No such file or directory/) {
  181: 	    print 'LON-CAPA is not running.'."\n";
  182:         } else {
  183: 	    print 'LON-CAPA is running.'."\n";
  184: 	    system("su www -c '/home/httpd/perl/loncron --justcheckconnections'");
  185:         }
  186:         if (! &LONCAPA::Firewall::firewall_is_active()) {
  187:             print 'The iptables firewall is not active'."\n";
  188:         }
  189:         if ($lond_port) {
  190:             my $londopen;
  191:             foreach my $fw_chain (@fw_chains) { 
  192:                 my $numopen = &LONCAPA::Firewall::firewall_is_port_open($iptables,$fw_chain,$lond_port,$lond_port,\%iphost);
  193:                 $londopen += $numopen; 
  194:             }
  195:             if ($londopen) {
  196:                 print "The LON-CAPA port ($lond_port) is open in firewall.\n";
  197:             } elsif (&LONCAPA::Firewall::firewall_is_active) {
  198:                 print "The LON-CAPA port ($lond_port) is NOT open in running firewall!\n";
  199:             }
  200:         } else {
  201:             if (&LONCAPA::Firewall::firewall_is_active()) {
  202:                 print "Could not check for status of LON-CAPA port in running firewall - port number unknown.\n";
  203:             } else {
  204:                 print "LON-CAPA port number is unknown, and firewall is not running.\n";
  205:             }
  206:         }
  207:     }
  208: } elsif ($command eq "reload") {
  209:     print 'Reload LON-CAPA config files'."\n";
  210:     system("su www -c '/home/httpd/perl/loncron --justreload'");
  211: } else {
  212:     print "You need to specify one of reload|restart|stop|start|status on the command line.\n";
  213: }