Apache::Logmonster - Apache log file splitter, processor, sorter, etc
Matt Simerson (email@example.com)
Creates a new Apache::Logmonster object. All methods in this module are Object Oriented and need to be accessed through the object you create. When you create a new object, you must pass as the first argument, a hashref of values from logmonster.conf. See t/Logmonster.t for a working example.
Checks to see if /etc/awstats is set up for awstats. If not, it creates it and installs a default awstats.conf. Finally, it makes sure the $domain it was passed has an awstats file configured for it. If not, it installs it.
perform some basic sanity tests on the environment Logmonster is running in. It will complain quite loudly if it finds things not to its liking.
Each virtual host that gets stats processing is expected to have a "stats" dir. I name mine "stats" and locate in the vhosts document root. I set the files ownership to root so that the user doesn't inadvertantly delete it via FTP. After splitting up the log files based on vhist, this sub first goes through the list of files in $tmpdir/doms. If the file name matches the vhost name, the contents of that log correspond to that vhost.
If the file is zero bytes, it deletes it as there is nothing to do.
Otherwise, it gathers the vhost name from the file and checks the %domains hash to see if a directory path exists for that vhost. If no hash entry is found or the entry is not a directory, then we declare the hits unmatched and discard them.
For log files with entries, we check inside the docroot for a stats directory. If no stats directory exists, then we discard those entries as well.
Compresses a file. Does a test first to make sure the file exists and then compresses it using gzip. You pass it a hostname and a file and it compresses the file on the remote host. Uses SSH to make the connection so you will need to have key based authentication set up.
Collects compressed log files from a list of servers into a working directory for processing.
feed_the_machine takes the sorted vhost logs and feeds them into the stats processor that you chose.
extracts a list of hosts from logmonster.conf, checks each host for log files and then downloads them all to the staging area.
checks your vhosts setting in logmonster.conf to determine where to find your Apache vhost information, and then parses your Apache config files to retrieve a list of the virtual hosts you server for as well as some attributes about each vhost (docroot, aliases).
If successful, it returns a hashref of elements.
Determines your list of domain and domain aliases based on presense of directories and symlinks on the file system. See the FAQ for details.
Parses a file looking for virtualhost declarations. It stores several attributes about each vhost including: servername, serveralias, and documentroot as these are needed to determine where to output logfiles and statistics to.
returns a hashref, keyed with the vhost servername. The value of the top level hashref is another hashref of attributes about that servername.
Determines where to fetch an intervals worth of logs from. Based upon the -i setting (hour,day,month), this sub figures out where to find the requested log files that need to be processed.
report_hits reads a days log results file and reports the results to standard out. The logfile contains key/value pairs like so:
This file is read by logmonster when called in -r (report) mode and is expected to be called via a SNMP agent.
Accepts a filehandle, which it then closes.
Appends information about referrer spam to the logmonster -v report. An example of that report can be seen here: http://www.tnpi.net/wiki/Referral_Spam
In addition to emailing you a copy of the report, Logmonster leaves behind a copy in the log directory. This file is ready when logmonster -r is run (typically by snmpd). This function simply opens the report and returns the filehandle.
By now we have collected the Apache logs from each web server and split them up based on vhost. Most stats processors require the logs to be sorted in cronological order. So, we open up each vhosts logs for the day, read them into a hash, sort them based on their log entry date, and then write them back out.
After collecting the log files from each server in the cluster, we need to split them up based upon the vhost they were intended for. This sub does that.
From the info in $domains_ref, creates a hash like this:
example.com => 'example.com',
example.net => 'example.com',
example.org => 'example.com',
as we parse through the log files, we do a lookup on this hash to see which logfile to write the entries out to. In theory, this is not necessary as we have appended the vhost name to the log entry, but this is absolutely required for the fallback method.
None known. Report any to author.
Support for analog.
Support for individual webalizer.conf file for each domain
Delete log files older than X days/month
Do something with error logs (other than just compress)
If files to process are larger than 10MB, find a nicer way to sort them rather than reading them all into a hash. Now I create two hashes, one with data and one with dates. I sort the date hash, and using those sorted hash keys, output the data hash to a sorted file. This is necessary as wusage and http-analyze require logs to be fed in chronological order. Take a look at awstats logresolvemerge as a possibility.
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To install Apache::Logmonster, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.