All Products
Search
Document Center

Simple Log Service:ALB

Last Updated:Jun 03, 2026

Lists the fields in ALB Layer 7 access logs.

Field

Description

__topic__

Log topic. Fixed value: alb_layer7_access_log.

body_bytes_sent

Size of the HTTP response body sent to the client. Unit: bytes.

client_ip

Client IP address.

host

Domain name or IP address, resolved in order: request parameters, host header, backend server IP.

http_host

Host header value in the request.

http_referer

URL of the referring page.

http_user_agent

Client browser information.

http_x_forwarded_for

Client IP address from HTTP proxy forwarding.

http_x_real_ip

Real client IP address.

read_request_time

Time for the proxy to read the request. Unit: milliseconds.

request_length

Length of the request, including the request line, headers, and body.

request_method

HTTP request method.

request_time

Time from when the proxy receives the first request to when it returns a response. Unit: seconds.

request_uri

Request URI received by the proxy.

scheme

Request scheme. Valid values: HTTP and HTTPS.

server_protocol

HTTP protocol version. Example: HTTP/1.0, HTTP/1.1.

slb_vport

Listening port of the load balancer.

app_lb_id

ALB instance ID.

ssl_cipher

SSL cipher suite. Example: ECDHE-RSA-AES128-GCM-SHA256.

ssl_protocol

SSL protocol version. Example: TLSv1.2.

status

HTTP status code of the proxy response.

tcpinfo_rtt

Time to establish a client TCP connection. Unit: microseconds.

time

Log entry creation time.

upstream_addr

IP address and port of the backend server.

upstream_response_time

Time from backend connection to receiving data and closing the connection. Unit: seconds.

upstream_status

Response status code from the backend server.

vip_addr

Virtual IP address of the load balancer.

write_response_time

Time for the proxy to send a response to the client after receiving it from the backend. Unit: milliseconds.

owner_id

Alibaba Cloud account ID of the ALB instance owner.

region

Region of the ALB instance.

instance_name

ALB instance name.

address_type

Address type. Valid values: Intranet and Internet.

vpc_id

VPC ID of the ALB instance.