External Application Load Balancer logging and monitoring overview
This document provides you an overview about logs and metrics generated byexternal Application Load Balancers.
To learn how to configure and useCloud LoggingandCloud Monitoring, list of metrics, log record formats,and other information, refer to the following pages:
- Global external Application Load Balancer and classic Application Load Balancer logging and monitoring.
- Regional external Application Load Balancer logging and monitoring.
Monitoring features
The following table indicates the monitoring features supported byexternal Application Load Balancers:
| Feature | External HTTP(S) | ||
|---|---|---|---|
| Global | Classic | Regional | |
| HTTP request count metrics | info | info | info |
| Byte count metrics | info | info | info |
| Round trip time (RTT) metrics | info | info | |
| Request latency metrics | info | info | info |
Logging features
The following table indicates the logging features supported byexternal Application Load Balancers:
| Feature | External HTTP(S) | |||||||
|---|---|---|---|---|---|---|---|---|
| Global | Classic | Regional | ||||||
| Log type | ||||||||
| HTTP request and response attribute logs | info | info | info | |||||
| HTTP request | info | info | info | |||||
| Log fields | ||||||||
| String which explains the proxy response | statusDetails | statusDetails | proxyStatus | |||||
| TLS metadata between client and load balancer | info | |||||||
| Labels describing the load balancer resource | info | info | info | |||||
Monitoring resources
The monitoring resources for global external Application Load Balancer andclassic Application Load Balancer are the same. The following table specifies theresource names for external Application Load Balancers in each mode:
| External HTTP(S) | |||
|---|---|---|---|
| Global | Classic | Regional | |
| Logging monitored-resource type | "Application Load Balancer"http_load_balancer | "Regional External Application Load Balancer Rule"http_external_regional_lb_rule | |
| Monitoring monitored-resource type | "Application Load Balancer Rule" (Logs-based Metrics)l7_lb_rule | "Regional External Application Load Balancer Rule"http_external_regional_lb_rule | |
"Global External Application Load Balancer Rule"https_lb_rule | |||
What's next
- Readconceptual information about external Application Load Balancers.
- Interactive walkthrough to view and analyze log entries for global external Application Load Balancers.
- Interactive walkthrough to create alerting policies for global external Application Load Balancers.
Except as otherwise noted, the content of this page is licensed under theCreative Commons Attribution 4.0 License, and code samples are licensed under theApache 2.0 License. For details, see theGoogle Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-12-15 UTC.