Read the article to know the steps to log backend requests in HAProxy. At Bobcares, with our Server Management Service, we can handle your HAProxy issues.

Steps to log backend requests in HAProxy

In order to log the backend requests in HAProxy, we must run the following steps:

• Firstly, edit the HAProxy setup file. It is possible by going to /etc/haproxy/haproxy.cfg (the exact location depends on our system). Then use a text editor with enough rights to open the file.
• Then set up the logging format. We must create a unique log format to record the details of the backend requests. The log-format directive is used to specify the log format. We can use the below format for backend request logging:

  

  This log format records a variety of request data, including the client’s IP address, client port number, date and time, frontend and backend names, the status of the response, the length of time for various phases, and more.
• Now enable Logging for the Backend by ensuring that the option httplog is present in the backend server setup. This makes it possible for that backend to log HTTP requests and responses.

  The option httplog directive instructs HAProxy to log the requests and responses for the backend named my_backend.
• Finally, restart HAProxy. In order to make the configuration file changes take effect after editing, save the file and restart HAProxy using the below code:

  

Else, we can use the init system and the appropriate command based on our system.

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Conclusion

HAProxy will begin writing the logs to the selected log file as soon as we enable backend request logging in HAProxy. The path to the log file by default is /var/log/haproxy.log, however, this may change considering our setup.