Monitor Load Balancer access logs
Monitor Load Balancer access logs
Updated on 05 Aug 2025

Access Log

The Access Log feature of the Load Balancer allows capturing all information about incoming requests, including client IP, port, method, path, and server response. This is a vital tool for analyzing traffic, monitoring performance, ensuring security, and optimizing the system.

How to use the Access Log feature

Step 1: On the Load Balancer list screen, select the Load Balancer you want to view logs for → go to the Access logs tab.

Step 2: You can view logs with the following fields:

Note: Load Balancer access logs are retained for up to 7 days.

Field Name Description
Timestamp Time when the Load Balancer received the request
Listener Name of the listener that received the request
Server pool Name of the pool the request was forwarded to
Bytes sent Number of bytes sent to the client (body only, excluding HTTP headers)
Bytes uploaded Bytes uploaded to the backend server
Client IP IP address of the client that sent the request
Client port Port of the client that sent the request
Request Full HTTP request received from the client, including method, URL, version
Member Name of the backend server that handled the request
SSL verify Result of client SSL certificate verification (only applicable with SSL)
Status code HTTP status code returned to the client
Total time (ms) Total time to process the request and send the response, in milliseconds

Users can select a specific Time range or use the Filter function to specify fields and values to view logs more precisely.

Step 3: To download the .log file of Load Balancer access logs for a selected time period, click on Export logs.

The downloaded log file will be in .log format with the following naming convention:

  • File name format: loadbalancer_accesslogs__starttime_endtime
  • Where:
    • start time & end time format: YYYYMMDDTHH:mmTimezone
    • Time is based on browser time, e.g., 20240729T2300+0700