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Diff for /loncom/Attic/lonManage between versions 1.14 and 1.24

version 1.14, 2003/09/08 09:45:20 version 1.24, 2003/11/04 11:36:04
Line 33 Line 33
 #   it is a command line tool.  The following command line syntax (usage)  #   it is a command line tool.  The following command line syntax (usage)
 #   is supported:  #   is supported:
 #  #
 #    lonManage  -push   <tablename>  newfile  host  #    lonManage  -push   <tablename>  newfile  [host]
 #        Push <tablename> to the lonTabs directory.  Note that  #        Push <tablename> to the lonTabs directory.  Note that
 #        <tablename> must be one of:  #        <tablename> must be one of:
 #           hosts  (hosts.tab)  #           host  (hosts.tab)
 #           domain (domain.tab)  #           domain (domain.tab)
 #  #
 #    lonManage  -reinit lonc host  #    lonManage  -reinit lonc [host]
 #           Sends a HUP signal to the remote systems's lond.  #           Sends a HUP signal to the remote systems's lond.
 #  #
 #    lonmanage  -reinit lond host  #    lonmanage  -reinit lond [host]
 #          Requests the remote system's lond perform the same action as if  #          Requests the remote system's lond perform the same action as if
 #          it had received a HUP signal.  #          it had received a HUP signal.
 #  #
 #    In the above syntax, the host above is the hosts.tab name of a host,  #    In the above syntax, the host above is the hosts.tab name of a host,
 #    not the IP address of the host.  #    not the IP address of the host
 #  #  
 #  $Log$  #   If [host] is not supplied, every host in the client's hosts.tab
 #  Revision 1.14  2003/09/08 09:45:20  foxr  #   table is iterated through and procesed..
 #  Remove BUGBUG about comment about authentication as we'll be doing  
 #  host based authentication initially (no need for lonManage to do anything),  
 #  and certificate based later (need at that time).  
 #  
 #  Revision 1.13  2003/08/19 10:26:24  foxr  
 #  Initial working version... tested against an unmodified lond this  
 #  produces an unknown_cmd response which is about what I'd expect.  
 #  
 #  Revision 1.12  2003/08/18 11:08:07  foxr  
 #  Debug request building in Transact.  
 #  
 #  Revision 1.11  2003/08/18 10:45:32  foxr  
 #  Felt strongly enough about hoisting ReadConfiguration into a separate sub  
 #  that I did it now before I forgot.  
 #  
 #  Revision 1.10  2003/08/18 10:43:31  foxr  
 #  Code/test ValidHost.  The hosts.tab and the perl variables are read in as  
 #  global hashes as a side effect.  May later want to clean this up by making  
 #  a separate getconfig function and hoisting the config reads into that.  
 #  
 #  Revision 1.9  2003/08/18 10:25:46  foxr  
 #  Write ReinitProcess function in terms of ValidHost and Transact.  
 #  
 #  Revision 1.8  2003/08/18 10:18:21  foxr  
 #  Completed PushFile function in terms of  
 #  - ValidHost - Determines if target host is valid.  
 #  - Transact  - Performs one of the valid transactions with the  
 #                appropriate lonc<-->lond client/server pairs.  
 #  
 #  Revision 1.7  2003/08/18 09:56:01  foxr  
 #  1. Require to be run as root.  
 #  2. Catch case where no operation switch is supplied and put out usage.  
 #  3. skeleton/comments for PushFile function.  
 #  
 #  Revision 1.6  2003/08/12 11:02:59  foxr  
 #  Implement command switch dispatching.  
 #  
 #  Revision 1.5  2003/08/12 10:55:42  foxr  
 #  Complete command line parsing (tested)  
 #  
 #  Revision 1.4  2003/08/12 10:40:44  foxr  
 #  Get switch parsing right.  
 #  
 #  Revision 1.3  2003/08/12 10:22:35  foxr  
 #  Put in parameter parsing infrastructure  
 #  
 #  Revision 1.2  2003/08/12 09:58:49  foxr  
 #  Add usage and skeleton documentation.  
 #  #
 #  #
   
Line 106 Line 58
   
 # Modules required:  # Modules required:
   
   use lib ".";
   
 use strict; # Because it's good practice.  use strict; # Because it's good practice.
 use English; # Cause I like meaningful names.  use English; # Cause I like meaningful names.
 use Getopt::Long;  use Getopt::Long;
 use LONCAPA::Configuration; # To handle configuration I/O.  use LondConnection;
 use IO::Socket::UNIX; # To communicate with lonc.  use IO::Poll qw(POLLRDNORM POLLWRNORM POLLIN POLLHUP POLLOUT);
   
 # File scoped variables:  # File scoped variables:
   
 my %perlvar; # Perl variable defs from apache config.  my %perlvar; # Perl variable defs from apache config.
 my %hostshash; # Host table as a host indexed hash.  my %hostshash; # Host table as a host indexed hash.
   
   my $MyHost=""; # Host name to use as me.
   my $ForeignHostTab=""; # Name of foreign hosts table.
   
   my $DefaultServerPort =  5663; # Default server port if standalone.
   my $ServerPort; # Port used to connect to lond.
   
   my $TransitionTimeout = 5; # Poll timeout in seconds.
   
   
   # LondConnection::SetDebug(10);
   
   
 #  #
 #   prints out utility's command usage info.  #   prints out utility's command usage info.
 #  #
 sub Usage  {  sub Usage  {
     print "Usage:";      print "Usage:";
     print <<USAGE;      print <<USAGE;
     lonManage  --push=<tablename>  newfile  host   lonManage  [--myname=host --hosts=table] --push=<tablename>  newfile  [host]
         Push <tablename> to the lonTabs directory.  Note that          Push <tablename> to the lonTabs directory.  Note that
         <tablename> must be one of:          <tablename> must be one of:
            hosts  (hosts.tab)             host  (hosts.tab)
            domain (domain.tab)             domain (domain.tab)
   
     lonManage  --reinit=lonc host   lonManage [--myname=host --hosts=table] --reinit=lonc [host]
            Sends a HUP signal to the remote systems's lond.         Causes lonc in the remote system to reread hosts.tab and
          adjust the set of clients that are being maintained to match
     lonManage  --reinit=lond host         the new file.
           Requests the remote system's lond perform the same action as if         
           it had received a HUP signal.  
    lonManage [--myname=host --hosts=table] --reinit=lond [host]
          Causes lond in the remote system to reread the hosts.tab file
          and adjust the set of servers to match changes in that file.
   
     In the above syntax, the host above is the hosts.tab name of a host,      In the above syntax, the host above is the hosts.tab name of a host,
     not the IP address of the host.      not the IP address of the host.
   
       If [host] is omitted, all hosts in the hosts.tab file are iterated
       over.
   
    For all of the above syntaxes if --myname=host and --hosts=table are
    supplied (both must be present), the utility runs in standalone mode
    presenting itself to the world as 'host' and using the hosts.tab file
    specified in the --hosts switch.
 USAGE  USAGE
   
   
 }  }
   
   #
   #  Make a direct connection to the lond in 'host'.  The port is 
   #  gotten from the global variable:  ServerPort.
   #  Returns:
   #    The connection or undef if one could not be formed.
   #
   sub MakeLondConnection {
       my $host = shift;
   
       my $Connection = LondConnection->new($host, $ServerPort);
       return return $Connection;
   }
   #
   #    This function runs through the section of the connection
   #   state machine that has to do with negotiating the startup 
   #   sequence with lond.  The general strategy is to loop
   #   until the connection state becomes idle or disconnected.
   #   Disconnected indicates an error or rejection of the
   #   connection at some point in the negotiation.
   #   idle indicates a connection ready for a request.
   #   The main loop consults the object to determine if it
   #   wants to be writeable or readable, waits for that
   #   condition on the socket (with timeout) and  then issues
   #   the appropriate LondConnection call. Note that
   #   LondConnection is capable of doing everything necessary
   #   to get to the initial idle state.
   # 
   #
   #  Parameters:
   #     connection - A connection that has been created with
   #                  the remote lond.  This connection should
   #                  be in the Connected state ready to send
   #                  the init sequence.
   #
   sub NegotiateStartup {
       my $connection = shift;
       my $returnstatus = "ok"; # Optimistic!!.
   
       my $state      = $connection->GetState;
       if($state ne "Connected") {
    print "Error: Initial lond connection state: $state should be Connected\n";
    return "error";
       }
       my $Socket     = $connection->GetSocket; # This is a IO:Socket::INET object.
   
       #  Ready now to enter the main loop:
       #
       my $error = 0;
       while (($connection->GetState ne "Idle") && (!$error)) {
    #
    #   Wait for the socket to get into the appropriate state:
    #
    my $wantread = $connection->WantReadable; 
    my $poll     = new IO::Poll;
    $poll->mask($Socket => $wantread ? POLLIN : POLLOUT);
    $poll->poll($TransitionTimeout);
    my $done     = $poll->handles();
    if(scalar($done) == 0) {                       # Timeout!!!
       print "Error: Timeout in state : $state negotiating connection\n";
       $returnstatus = "error";
       $error = 1;
    } else {
       my $status;
       $status = $wantread ? $connection->Readable : $connection->Writable;
       if ($status != 0) {
    print "Error: I/O failed in state : $state negotiating connection\n";
    $returnstatus = "error";
    $error = 1;
       }
    }
       }
   
       
       return $returnstatus;
   }
   #
   #   Perform a transaction with the remote lond.
   #   Paramters:
   #      connection - the connection object that represents
   #                   a LondConnection to the remote lond.
   #      command    - The request to send to the remote system.
   #   Returns:
   #       The 'reaction' of the lond to this command.
   #       However if the connection to lond is lost during the transaction
   #       or some other error occurs, the text "error:con_lost" is returned.
   #    
   sub PerformTransaction {
       my $connection  = shift;
       my $command     = shift;
       my $retval;                          # What we'll returnl.
      
       #  Set up the connection to do the transaction then
       #  do the I/O until idle or error.
       #
       $connection->InitiateTransaction($command);
       my $error      = 0;
       my $Socket    = $connection->GetSocket;
       my $state;
   
       while (($connection->GetState ne "Idle") && (!$error)) {
    #
    #   Wait for the socket to get into the appropriate state:
    #
    my $wantread = $connection->WantReadable; 
    my $poll     = new IO::Poll;
    $poll->mask($Socket => $wantread ? POLLIN : POLLOUT);
    $poll->poll($TransitionTimeout);
    my $done     = $poll->handles();
    if(scalar($done) == 0) {                       # Timeout!!!
       print "Error: Timeout in state : $state negotiating connection\n";
       $retval = "error";
       $error = 1;
    } else {
       my $status;
       $status = $wantread ? $connection->Readable : $connection->Writable;
       if ($status != 0) {
    print "Error: I/O failed in state : $state negotiating connection\n";
    $retval = "error";
    $error = 1;
       }
    }
       }
       #
       #  Fetch the reply from the transaction
       #
       if(! $error) {
    $retval = $connection->GetReply;
       }
   
       return $retval;
   }
 #  #
 #   Lifted from lonnet.pm - and we need to figure out a way to get it back in.  # Performs a transaction direct to a remote lond.
 #   Performas a transaction with lond via the lonc proxy server.  
 #   Parameter:  #   Parameter:
 #      cmd  - The text of the request.  #      cmd  - The text of the request.
 #      host - The host to which the request ultimately goes.  #      host - The host to which the request ultimately goes.
Line 153  USAGE Line 261  USAGE
 #      lond/lonc etc.  #      lond/lonc etc.
 #  #
 sub subreply {  sub subreply {
     my ($cmd,$server)=@_;      my $cmd = shift;
     my $peerfile="$perlvar{'lonSockDir'}/$server";      my $host = shift;
     my $client=IO::Socket::UNIX->new(Peer    =>"$peerfile",  
                                      Type    => SOCK_STREAM,  
                                      Timeout => 10)      my $connection  = MakeLondConnection($host);
        or return "con_lost";      if ($connection eq undef) {
     print $client "$cmd\n";   return "Connect Failed";
     my $answer=<$client>;      }
     if (!$answer) { $answer="con_lost"; }      my $reply = NegotiateStartup($connection);
     chomp($answer);      if($reply ne "ok") {
     return $answer;   return "connection negotiation failed";
       }
       print "Connection negotiated\n";
       my $reply =  PerformTransaction($connection, $cmd);
       return $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>;
        #    if (!$answer) { $answer="con_lost"; }
        #    chomp($answer);
        #    return $answer;
 }  }
 #   >>> BUGBUG <<<   #   >>> BUGBUG <<< 
 #  #
Line 189  sub subreply { Line 314  sub subreply {
 #   returns an empty list if the parse fails.  #   returns an empty list if the parse fails.
 #  #
   
   
 sub ParseArgs {  sub ParseArgs {
     my $pushing   = '';      my $pushing   = '';
     my $reinitting = '';      my $reinitting = '';
   
     if(!GetOptions('push=s'    => \$pushing,      if(!GetOptions('push=s'    => \$pushing,
            'reinit=s'  => \$reinitting)) {             'reinit=s'  => \$reinitting,
      'myname=s' => \$MyHost,
      'hosts=s' => \$ForeignHostTab)) {
    return ();
       }
       #  The --myname and --hosts switch must have values and
       #  most both appear if either appears:
   
       if(($MyHost ne "") && ($ForeignHostTab eq "")) {
    return ();
       }
       if(($ForeignHostTab ne "") && ($MyHost eq "")) {
  return ();   return ();
     }      }
   
Line 207  sub ParseArgs { Line 344  sub ParseArgs {
   
     if($pushing ne '') {      if($pushing ne '') {
   
         # --push takes in addition a table, and a host:          # --push takes in addition a table, and an optional  host:
         #          #
  if($paramcount != 2) {   if(($paramcount != 2) && ($paramcount != 1)) {
     return (); # Invalid parameter count.      return (); # Invalid parameter count.
  }   }
  if($command ne '') {   if($command ne '') {
Line 223  sub ParseArgs { Line 360  sub ParseArgs {
   
     if ($reinitting ne '') {      if ($reinitting ne '') {
   
  # --reinit takes in addition just a host name   # --reinit takes in addition just an optional  host name
   
  if($paramcount != 1) {   if($paramcount > 1) {
     return ();      return ();
  }   }
  if($command ne '') {   if($command ne '') {
Line 247  sub ParseArgs { Line 384  sub ParseArgs {
     return @result;      return @result;
 }  }
 #  #
 #  Read the loncapa configuration stuff.  #  Read the loncapa configuration stuff.  If ForeignHostTab is empty,
   #  assume we are part of a loncapa cluster and read the hosts.tab
   #  file from the config directory.  Otherwise, ForeignHossTab
   #  is the name of an alternate configuration file to read in 
   #  standalone mode.
 #  #
 sub ReadConfig {  sub ReadConfig {
     my $perlvarref = LONCAPA::Configuration::read_conf('loncapa.conf');  
     %perlvar       = %{$perlvarref};  
     my $hoststab   = LONCAPA::Configuration::read_hosts(  
  "$perlvar{'lonTabDir'}/hosts.tab");  
     %hostshash     = %{$hoststab};  
   
       if($ForeignHostTab eq "") {
    my $perlvarref = LondConnection::read_conf('loncapa.conf');
    %perlvar       = %{$perlvarref};
    my $hoststab   = LondConnection::read_hosts(
       "$perlvar{'lonTabDir'}/hosts.tab");
    %hostshash     = %{$hoststab};
    $MyHost        = $perlvar{lonHostID}; # Set hostname from vars.
    $ServerPort    = $perlvar{londPort};
       } else {
   
    LondConnection::ReadForeignConfig($MyHost, $ForeignHostTab);
     my $hoststab = LondConnection::read_hosts($ForeignHostTab); #  we need to know too.
     %hostshash   = %{$hoststab};
     $ServerPort    = $DefaultServerPort;
         }
       
 }  }
 #  #
 #  Determine if the target host is valid.  #  Determine if the target host is valid.
Line 271  sub ReadConfig { Line 423  sub ReadConfig {
 sub ValidHost {  sub ValidHost {
     my $host       = shift;      my $host       = shift;
         
     ReadConfig;  
   
     return defined $hostshash{$host};      return defined $hostshash{$host};
   
Line 367  sub PushFile { Line 518  sub PushFile {
   
     if( ($tablename eq "host")    ||      if( ($tablename eq "host")    ||
  ($tablename eq "domain")) {   ($tablename eq "domain")) {
    print("Pushing $tablename to $host\n");
  Transact($host, "pushfile:$tablename",\@table);   Transact($host, "pushfile:$tablename",\@table);
     } else {      } else {
  die "EINVAL - Invalid parameter. tablename: $tablename must be host or domain";   die "EINVAL - Invalid parameter. tablename: $tablename must be host or domain";
Line 400  sub ReinitProcess { Line 552  sub ReinitProcess {
   
     if(($process eq "lonc") ||      if(($process eq "lonc") ||
        ($process eq "lond")) {         ($process eq "lond")) {
    print("Reinitializing $process in $host\n");
  Transact($host, "reinit:$process");   Transact($host, "reinit:$process");
     } else {      } else {
  die "EINVAL -Invalid parameter. Process $process must be lonc or lond";   die "EINVAL -Invalid parameter. Process $process must be lonc or lond";
Line 407  sub ReinitProcess { Line 560  sub ReinitProcess {
 }  }
 #--------------------------- Entry point: --------------------------  #--------------------------- Entry point: --------------------------
   
   
   
 #  Parse the parameters  #  Parse the parameters
 #  If command parsing failed, then print usage:  #  If command parsing failed, then print usage:
   
Line 424  if ($EUID != 0) { Line 579  if ($EUID != 0) {
     die "ENOPRIV - No privilege for requested operation"      die "ENOPRIV - No privilege for requested operation"
 }  }
   
   #
   #   Read the configuration file.
   #   
   
   ReadConfig; # Read the configuration info (incl.hosts).
   
 #   Based on the operation requested invoke the appropriate function:  #   Based on the operation requested invoke the appropriate function:
   
Line 433  if($operation eq "push") {  # push table Line 593  if($operation eq "push") {  # push table
     my $tablename = shift @params;      my $tablename = shift @params;
     my $tablefile = shift @params;      my $tablefile = shift @params;
     my $host      = shift @params;      my $host      = shift @params;
     PushFile($tablename, $tablefile, $host);      if($host) {
    PushFile($tablename, $tablefile, $host);
       } else { # Push to whole cluster.
    foreach my $host (keys %hostshash) {
       PushFile($tablename, $tablefile, $host);
    }
       }
   
 } elsif($operation eq "reinit") { # reinit processname host.  } elsif($operation eq "reinit") { # reinit processname host.
     my $process   = shift @params;      my $process   = shift @params;
     my $host      = shift @params;      my $host      = shift @params;
     ReinitProcess($process, $host);      if ($host) {
 }   ReinitProcess($process, $host);
       } else { # Reinit whole cluster.
    foreach my $host (keys %hostshash) {
       ReinitProcess($process,$host);
    }
       }
   } 
 else {  else {
     Usage;      Usage;
 }  }
Removed from v.1.14  
changed lines
  Added in v.1.24

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