CREATE AUDIT POLICY

Description

Creates a unified audit policy.

Precautions

• Only the user with the poladmin or sysadmin permission, or initial user has the permission to maintain audit policies.

• Before creating an audit policy, ensure that the security policy function has been enabled. That is, the masking policy takes effect only after the GUC parameter enable_security_policy is set to on.
• A system administrator or security policy administrator can access the GS_AUDITING_POLICY, GS_AUDITING_POLICY_ACCESS, GS_AUDITING_POLICY_PRIVILEGES, and GS_AUDITING_POLICY_FILTERS system catalogs to query the created audit policies.
• The audit policy name must be unique to avoid conflicts with existing policies. You can use IF NOT EXISTS to check whether the specified audit policy exists to avoid repeated creation.

When you use database links to perform operations on remote objects, the client initiates a database link request. The actual sender is the server, and the attributes such as the IP address of the sender are the values of the server. For details, see DATABASE LINK.

Syntax

CREATE AUDIT POLICY [ IF NOT EXISTS ] policy_name { { privilege_audit_clause | access_audit_clause } [, ... ] [ filter_group_clause ] [ ENABLE | DISABLE ] };

• privilege_audit_clause

  1	PRIVILEGES { DDL | ALL } [ ON LABEL ( resource_label_name [, ... ] ) ]

• access_audit_clause

  ACCESS { DML | ALL } [ ON LABEL ( resource_label_name [, ... ] ) ]

Parameters

• policy_name

  Specifies the audit policy name, which must be unique.

  Value range: a string. It must comply with the naming convention.

• resource_label_name

  Specifies the resource label name.

• DDL

  Specifies the operations that are audited in the database: CREATE, ALTER, DROP, ANALYZE, COMMENT, GRANT, REVOKE, SET, and SHOW.

  If this parameter is set to ANALYZE, both ANALYZE and VACCUM operations are audited.

• DML

  Specifies the operations that are audited within the database: SELECT, COPY, DEALLOCATE, DELETE, EXECUTE, INSERT, PREPARE, REINDEX, TRUNCATE, and UPDATE.

• ALL

  Specifies all operations supported by the specified DDL or DML statements in the database. When the form is { DDL | ALL }, ALL indicates all DDL operations. When the form is { DML | ALL }, ALL indicates all DML operations.

• FILTER_TYPE

  Specifies the types of information to be filtered by the policy, including APP, ROLES, and IP.

• filter_value

  Indicates the detailed information to be filtered.

• ENABLE|DISABLE

  Enables or disables the unified audit policy. If ENABLE|DISABLE is not specified, ENABLE is used by default.

Examples

• Creates audit policy for executing CREATE on the database.

  -- Create the adt1 policy.
  gaussdb=# CREATE AUDIT POLICY adt1 PRIVILEGES CREATE; 
  
  -- View the adt1 policy.
  gaussdb=# SELECT * FROM GS_AUDITING_POLICY;
   polname | polcomments |         modifydate         | polenabled 
  ---------+-------------+----------------------------+------------
   adt1    |             | 2023-11-06 16:41:40.947417 | t
  
  -- Check the location where the audit policy is stored.
  gaussdb=# SHOW audit_directory;
  
  -- Delete the audit policy adt1.
  gaussdb=# DROP AUDIT POLICY adt1;

• Create an audit policy to audit only the CREATE operation performed by the dev_audit user.

  -- Create user dev_audit.
  gaussdb=# CREATE USER dev_audit PASSWORD '********';
  
  -- Create the tb_for_audit table.
  gaussdb=# CREATE TABLE tb_for_audit(col1 text, col2 text, col3 text); 
  
  -- Create the adt_lb0 resource label based on the tb_for_audit table.
  gaussdb=# CREATE RESOURCE LABEL adt_lb0 add TABLE(public.tb_for_audit);
  
  -- Create the adt2 audit policy for the CREATE operation on the adt_lb0 resource.
  gaussdb=# CREATE AUDIT POLICY adt2 PRIVILEGES CREATE ON LABEL(adt_lb0) FILTER ON ROLES(dev_audit);
  
  -- Delete the audit policy adt2.
  gaussdb=# DROP AUDIT POLICY adt2;
  
  -- Delete the tb_for_audit table.
  gaussdb=# DROP TABLE tb_for_audit;
  
  -- Delete the dev_audit user.
  gaussdb=# DROP USER dev_audit;

• Create an audit policy to audit only the SELECT, INSERT, and DELETE operations performed on the adt_lb0 resource by user dev_audit using client tool gsql on the servers whose IP addresses are 10.20.30.40 and 127.0.0.0/24, respectively.

  -- Create a user dev_audit.
  gaussdb=# CREATE USER dev_audit PASSWORD '********';
  
  -- Create the audit policy adt3.
  gaussdb=# CREATE AUDIT POLICY adt3 ACCESS SELECT ON LABEL(adt_lb0), INSERT ON LABEL(adt_lb0), DELETE FILTER ON ROLES(dev_audit), APP(gsql), IP('10.20.30.40', '127.0.0.0/24');
  
  -- Delete the audit policy adt3.
  gaussdb=# DROP AUDIT POLICY adt3;
  
  -- Delete the dev_audit user.
  gaussdb=# DROP USER dev_audit;

Helpful Links

ALTER AUDIT POLICY and DROP AUDIT POLICY