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|
#!@PERL@
# Copyright (C) 2002 Stanislav Sinyagin
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
# Stanislav Sinyagin <ssinyagin@k-open.com>
# we cannot report a failure of STDERR reopening, as we are already a
# forked child, so this Perl::Critic warning is disabled.
## no critic (InputOutput::RequireCheckedOpen)
use strict;
use warnings;
BEGIN { require '@torrus_config_pl@'; }
use IO::File;
use Proc::Daemon;
use Getopt::Long;
use Torrus::Log;
use Torrus::Monitor;
use Torrus::AgentScheduler;
use Torrus::SiteConfig;
exit(1) unless Torrus::SiteConfig::verify();
my $tree;
my $nodaemon;
my $runonce;
my $runalways;
my $delay = 0;
my $debug;
my $verbose;
my $help_needed;
# Derive the process name from the command line
my $process_name = $0;
$process_name =~ s/^.*\/([^\/]+)$/$1/;
$process_name .= ' ' . join(' ', @ARGV);
my $ok = GetOptions ('tree=s' => \$tree,
'nodaemon' => \$nodaemon,
'runonce' => \$runonce,
'runalways' => \$runalways,
'delay=i' => \$delay,
'debug' => \$debug,
'verbose' => \$verbose,
'help' => \$help_needed);
if( not $ok or not $tree or $help_needed or scalar(@ARGV) > 0 )
{
print STDERR "Usage: $0 --tree=NAME [options...]\n",
"Options:\n",
" --tree=NAME tree name\n",
" --nodaemon do not fork daemon and log to STDERR\n",
" --runonce run one time and exit. Implies --nodaemon\n",
" --runalways continue running if no monitors defined\n",
" --delay delay the start of the first cycle, minutes\n",
" --debug set the log level to debug\n",
" --verbose set the log level to info\n",
" --help this help message\n";
exit 1;
}
if( not Torrus::SiteConfig::mayRunMonitor( $tree ) )
{
Error('Tree ' . $tree . ' is not configured to run monitor');
exit 1;
}
if( $debug )
{
Torrus::Log::setLevel('debug');
}
elsif( $verbose )
{
Torrus::Log::setLevel('verbose');
}
my $pidfile;
if( not $nodaemon and not $runonce )
{
my $pidfilename =
$Torrus::Global::pidDir . '/monitor.' . $tree . '.pid';
if( -r $pidfilename )
{
my $oldpid;
my $fh = IO::File->new($pidfilename, 'r');
if( defined($fh) )
{
$oldpid = $fh->getline();
}
$fh->close();
$oldpid = 'unknown' unless defined($oldpid);
Error('Another monitor daemon is running, pid=', $oldpid);
exit 1;
}
&Proc::Daemon::Init();
umask 0017; # Proc::Daemon::Init sets the mask to all-writable
setup_sighandlers();
# now we're forked, save the PID file for the END block
$pidfile = $pidfilename;
if( $Torrus::Monitor::useSyslog )
{
Torrus::Log::enableSyslog('torrus/monitor_' . $tree);
}
else
{
my $logfile = $Torrus::Global::logDir . '/monitor.' . $tree . '.log';
# At this point, we cannot tell anyone if "open" fails
open(STDERR, '>>', $logfile);
*STDERR->autoflush();
}
my $fh = IO::File->new($pidfile, 'w');
if( defined($fh) )
{
$fh->printf('%d', $$);
$fh->close();
}
else
{
Error("Cannot open $pidfile for writing: $!");
}
}
Info(sprintf("Torrus version %s", '@VERSION@'));
Info(sprintf("%s started for tree %s", $0, $tree));
Info(sprintf("Process ID %d", $$));
if( $delay > 0 )
{
Info(sprintf('Delaying for %d minutes', $delay));
sleep($delay * 60);
}
my %options =
(
'-ProcessName' => $process_name,
'-AgentName' => 'monitor',
'-Tree' => $tree,
'-Instance' => 0
);
if( $runonce )
{
$options{'-RunOnce'} = 1;
}
if( $runalways or $Torrus::Monitor::runAlways )
{
$options{'-RunAlways'} = 1;
}
eval {
my $scheduler = new Torrus::AgentScheduler( %options );
$scheduler->run();
};
if( not $options{'-RunOnce'} )
{
Error('Monitor process exited: ' .
'there is no datasource where monitoring is enabled');
}
exit;
sub setup_sighandlers
{
$SIG{'HUP'} = sub {
Warn('Received SIGHUP. Stopping the process.');
exit;
};
$SIG{'TERM'} = sub {
Warn('Received SIGTERM. Stopping the process.');
exit;
};
$SIG{'INT'} = sub {
Warn('Received SIGINT. Stopping the process');
exit;
};
};
END
{
if( defined($pidfile) and -r $pidfile )
{
unlink $pidfile;
}
}
# Local Variables:
# mode: perl
# indent-tabs-mode: nil
# perl-indent-level: 4
# End:
|
