- Introduction to Logging in Apache
- Default Apache Log Files
- Creating Log Formats
- Creating a Custom Log File
- Redirecting Logs to an External Program
- Logging Requests Conditionally
- Monitoring Who Is Linking to Your Website
- Monitoring Apache with mod_status
- Monitoring Apache with SNMP
- Analyzing Your Logs with Open-source Tools
- Monitoring Your Logs in Real Time
- Logging Requests to a Database
- Rotating and Archiving Logs
- Controlling IP Address Resolution
- Processing Logged IP Addresses
- Restarting Apache Automatically If It Fails
- Merging and Splitting Log Files
- Keeping Separate Logs for Each Virtual Host
- Common Log Entries
This chapter is from the book
This chapter is from the book
This chapter is from the book
Monitoring Your Logs in Real Time
In addition to mod_status and the various SNMP modules described earlier, you can use the apachetop command-line tool, which can be downloaded from http://clueful.shagged.org/apachetop/.
This tool works similarly to the Unix top command-line tool, but instead of displaying the status of the operating system, it displays the status of the web server in real time.
If you run Apache on a Unix system and you have a website with low traffic, you can use the tail command-line utility to rudimentarily monitor, in real time, log entries both to your access and error logs:
tail -f logfile
There are additional programs that enable you to quickly identify problems by scanning your error log files for specific errors, malformed requests, and so on, and reporting on them:
- Logscan can be found at http://www.garand.net/security.php
- ScanErrLog can be found at http://www.librelogiciel.com/software/