Log Analysis

Scenario

This section describes how to obtain and analyze the API calling logs of dedicated gateways.

Prerequisites

APIs have been called.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and select a region.
3. Click in the upper left corner and choose API Gateway.
4. In the navigation pane, choose Dedicated Gateways. Then click Access Console in the upper right corner of a dedicated gateway.
5. Choose API Calling > Access Logs, and click Configure Log Collection.
6. Enable log collection ().
7. Specify a log group and log stream, and click OK. For details about log groups and log streams, see Log Tank Service User Guide.
8. Click Log Fields to view the description of each log field. Then view and analyze logs by referring to the log field descriptions.
9. To export logs, see section "Log Transfer" in the Log Tank Service User Guide.

   Fields in access logs are separated using spaces. The following table describes each log field.

   Table 1 Log field description

   No.	Field	Description
   1	remote_addr	Client IP address
   2	request_id	Request ID
   3	api_id	API ID
   4	user_id	Project ID provided by a requester for IAM authentication
   5	app_id	App ID provided by a requester for app-based authentication
   6	time_local	Time when a request is received
   7	request_time	Request latency
   8	request_method	HTTP request method
   9	host	Domain name
   10	router_uri	Request URI
   11	server_protocol	Request protocol
   12	status	Response status code
   13	bytes_sent	Response size in bytes, including the status line, header, and body.
   14	request_length	Request length in bytes, including the start line, header, and body.
   15	http_user_agent	User agent ID
   16	http_x_forwarded_for	X-Forwarded-For header field
   17	upstream_addr	Backend address
   18	upstream_uri	Backend URI
   19	upstream_status	Backend response code
   20	upstream_connect_time	Time taken for establishing a connection with the backend
   21	upstream_header_time	Duration from the beginning of the establishment of a connection to receiving the first byte from the backend
   22	upstream_response_time	Duration from the beginning of the establishment of a connection to receiving the last byte from the backend
   23	region_id	Region ID