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Load Balancer

    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