Log Structuring Fields

Setting Log Structuring Fields

You can edit extracted fields after log structuring.

**Table 1** Rules for configuring structured fields
Structuring Method	Field Name	Field Type Can Be Changed	Field Can Be Deleted
Regular expressions (auto generate)	User-defined. The name must start with a letter and contain only letters and digits.	Yes	Yes
Regular expressions (manually enter)	User-defined. Default names such as field1, field2, and field3 will be used for unnamed fields. You can modify these names.	Yes	Yes
JSON	Names are set automatically, but you can set aliases for fields.	Yes	Yes
Delimiter	Default names such as field1, field2, field3 are used. You can modify these names.	Yes	Yes
Nginx	Names are set based on Nginx configuration, but you can set aliases for fields.	Yes	Yes
ELB structuring template	Defined by ELB.	No	No
VPC structuring template	Defined by VPC.	No	No
CTS structuring template	Keys in JSON log events.	No	No
APIG structuring template	Defined by APIG.	No	No
DCS audit logs	Defined by DCS.	No	No
Tomcat	Defined by Tomcat.	No	No
Nginx	Defined by Nginx.	No	No
GAUSSV5 audit logs	Defined by GAUSSV5.	No	No
DDS audit logs	Defined by DDS.	No	No
DDS error logs	Defined by DDS.	No	No
DDS slow query logs	Defined by DDS.	No	No
CFW access control logs	Defined by CFW.	No	No
CFW attack logs	Defined by CFW.	No	No
CFW traffic logs	Defined by CFW.	No	No
MySQL error logs	Defined by MySQL.	No	No
MySQL slow query logs	Defined by MySQL.	No	No
PostgreSQL error logs	Defined by PostgreSQL.	No	No
SQL Server error logs	Defined by SQL Server.	No	No
GaussDB(for Redis) slow query logs	Defined by GaussDB(for Redis).	No	No
CDN	Defined by CDN.	No	No
SMN	Defined by SMN.	No	No
GaussDB_MySQL error logs	Defined by GaussDB_MySQL.	No	No
GaussDB_MySQL slow query logs	Defined by GaussDB_MySQL.	No	No
Enterprise Router	Defined by ER.	No	No
MySQL audit logs	Defined by MySQL.	No	No
GaussDB(for Cassandra) slow query logs	Defined by GaussDB(for Cassandra).	No	No
GaussDB(for Mongo) slow query logs	Defined by GaussDB(for Mongo).	No	No
GaussDB(for Mongo) error logs	Defined by GaussDB(for Mongo).	No	No
Custom templates	User-defined.	Yes	Yes

When you use regular expressions (manually entered), JSON, delimiters, Nginx, or custom templates to structure logs, field names:

Can contain only letters, digits, hyphens (-), underscores (_), and periods (.).
Cannot start with a period (.) or underscore (_) or end with a period (.).
Can contain 1 to 64 characters.

Setting Tag Fields

When you structure logs, you can configure tag fields, so you can use these fields to run SQL queries on the Visualization page.

During field extraction, click the Tag Fields tab.
Click Add Field.
In the Field column, enter the name of the tag field, for example, hostIP.

If you configure tag fields for a structuring rule that was created before the function of tag fields was brought online, no example values will be shown with the tag fields.
To add more fields, click Add Field.
Click Save to save the settings.
- Tag fields can be the following system fields: category, clusterId, clusterName, containerName, hostIP, hostId, hostName, nameSpace, pathFile, and podName.
- Tag fields cannot be the following system fields: groupName, logStream, lineNum, content, logContent, logContentSize, and collectTime.
- You can configure both field extraction and tag fields during log structuring.