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Shell Programming and Scripting
Log Monitoring through Perl
Post 302208860 by solitare123 on Wednesday 25th of June 2008 06:42:16 AM
06-25-2008
Log Monitoring through Perl
Hi,
I am new to perl. I want to write a perl script to monitor logs. Where i want to monitor exceptions logged or any kind of error strings. I have a dir(On Solaris) with multiple log file which keeps rolling to .gz file after some time in that same dir. These logs files size keeps on increasing till the time they rollup.
In test.cfg i have put all the log dir which i want to read. and i am copying the exception and error trace to separate files.
#!/usr/local/bin/perl -w
$config_file="/opt/solitare/perl_script/test.cfg";
unless(open(CONFIG,"/opt/solitare/perl_script/test.cfg"))
{
die("Could not open Config File");
}
@config = <CONFIG>;
foreach $temp1(@config)
{
chomp($temp1);
chdir($temp1);
system("rm -r /opt/solitare/error_log/ ");
mkdir("/opt/solitare/error_log/",0777);
opendir(DIR,$temp1) || die("not able to open $temp1 dir\n");
while ($filename= readdir(DIR))
{
chomp($filename);
if($filename =~ /\.log$/)
{
print("file name is = $filename \n");
$logfile="outfile";
system ("touch outfile");
unless (open(OUTFILE,">>outfile"))
{
die ("cannot open output file outfile\n");
}
unless(open(FILE,"$filename"))
{
die "Could not open $filename input log file.";
}
foreach $line (<FILE>)
{
if($line =~ /Exception/ || $line =~ /at[\t ]/ || $line =~ /Error/)
{
print OUTFILE ($line);
# print ($line);
}
}
rename ($logfile , "/opt/solitare/error_log/$filename.bk");
# print("Back Up FIle Name $filename.bk\n");
print("scanning of $filename file is completed\n");
close(OUTFILE);
}
}
close(FILE);
}
close(CONFIG);
If i use this script for log file which are not increasing in size or not active currently, It works fine.
I hope am clear with my query, as i have put query for the first time on any forum.
Thanks.
I am new to perl. I want to write a perl script to monitor logs. Where i want to monitor exceptions logged or any kind of error strings. I have a dir(On Solaris) with multiple log file which keeps rolling to .gz file after some time in that same dir. These logs files size keeps on increasing till the time they rollup.
In test.cfg i have put all the log dir which i want to read. and i am copying the exception and error trace to separate files.
#!/usr/local/bin/perl -w
$config_file="/opt/solitare/perl_script/test.cfg";
unless(open(CONFIG,"/opt/solitare/perl_script/test.cfg"))
{
die("Could not open Config File");
}
@config = <CONFIG>;
foreach $temp1(@config)
{
chomp($temp1);
chdir($temp1);
system("rm -r /opt/solitare/error_log/ ");
mkdir("/opt/solitare/error_log/",0777);
opendir(DIR,$temp1) || die("not able to open $temp1 dir\n");
while ($filename= readdir(DIR))
{
chomp($filename);
if($filename =~ /\.log$/)
{
print("file name is = $filename \n");
$logfile="outfile";
system ("touch outfile");
unless (open(OUTFILE,">>outfile"))
{
die ("cannot open output file outfile\n");
}
unless(open(FILE,"$filename"))
{
die "Could not open $filename input log file.";
}
foreach $line (<FILE>)
{
if($line =~ /Exception/ || $line =~ /at[\t ]/ || $line =~ /Error/)
{
print OUTFILE ($line);
# print ($line);
}
}
rename ($logfile , "/opt/solitare/error_log/$filename.bk");
# print("Back Up FIle Name $filename.bk\n");
print("scanning of $filename file is completed\n");
close(OUTFILE);
}
}
close(FILE);
}
close(CONFIG);
If i use this script for log file which are not increasing in size or not active currently, It works fine.
I hope am clear with my query, as i have put query for the first time on any forum.
Thanks.
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LEARN ABOUT OPENSOLARIS
grablogs.conf
grablogs.conf(4) File Formats grablogs.conf(4) NAME
grablogs.conf - grablogs configuration for libgrablogs.so of the plugins of gnome-system-log file SYNOPSIS
/usr/lib/gnome-system-log/plugins/grablogs.conf DESCRIPTION
The libgrablogs.so is a plugin for gnome-system-log(1), it colloct the log files from the system as many as possible. grablogs.conf is a configuration file that contains a set of lines mixed with sh(1) syntax codes and individual log files. libgrablogs.so will read the file try to get a log files list for gnome-system-log(1). Users can copy the file into $HOME/.gnome2/gnome-system-log/plugins/`uname -p` to overwrite the system default one. The grablogs.conf file contains the following configuration categories: [configs] Each line under this category is interpreted as a config file of System. The plugin will open the config file and try to find all system paths of the logs. [commands] Each line under this category is interpreted as a shell command and will be execute through a pipe. And each line of the out- put of the command will be interpreted as a log path. [logs] Each line under this category is interpreted as a log path. FILES
/usr/lib/gnome-system-log/plugins/grablogs.conf The system default configuration file for the plugin libgrablogs.so $HOME/.gnome2/gnome-system-log/plugins/`uname -p`/grablogs.conf The user specific configuration file for the plugin libgrablogs.so EMAMPLE
[configs] /etc/syslog.conf [commands] for i in `svcs -aH -o FMRI | grep -v lrc `; do svcprop -p restarter/logfile $i 2>/dev/null || svcprop -q -p restarter/alt_logfile $i 2>/dev/null ; done [logs] /var/log/messages /var/log/secure /var/log/maillog /var/log/cron /var/log/Xorg.0.log /var/log/XFree86.0.log /var/log/auth.log /var/log/cups/error_log SEE ALSO
gnome-system-log(1), pipelog.conf(1) gnome-utils 2.16.0 13 Oct 2006 grablogs.conf(4)