Logging Redaction

ESS supports configurable redaction of JSON log messages.

Configure Redaction Rules

For an ESS service, operators can configure various INRUPT_LOGGING_REDACTION_{NAME}_ settings to create the redaction rules.

To specify a rule for an ESS service, the operator:

1. Determines a {NAME} to use for the redaction rule. See also Uniqueness of Rule Name.

2. Determines the target of the redaction rule by setting one of the following configurations for the service:

   Configuration	Description
   INRUPT_LOGGING_REDACTION_{NAME}_FIELD	To target a specific log message field.
   INRUPT_LOGGING_REDACTION_{NAME}_PATTERN	To target log message text that matches a specified pattern.
   INRUPT_LOGGING_REDACTION_{NAME}_EXCEPTION	To target an exception message class.

3. Specify the action in INRUPT_LOGGING_REDACTION_{NAME}_ACTION :

   REPLACE	Default. Replaces the matching text with a specified replacement.
   PLAIN	Leaves the matching field unprocessed. Only available if the redaction target is a field (i.e., INRUPT_LOGGING_REDACTION_{NAME}_FIELD).
   DROP	Suppresses the matching field. Only available if the redaction target is a field (i.e., INRUPT_LOGGING_REDACTION_{NAME}_FIELD).
   PRIORITIZE	Changes the log level of the matching message.
   SHA256	Replaces the matching text with its hash.

4. Specifies any associated configuration for the specified action:

• If the action is REPLACE , the operator can specify INRUPT_LOGGING_REDACTION_{NAME}_REPLACEMENT (or use the default [REDACTED] ).

• If the action is to PRIORITIZE , the operator can specify the INRUPT_LOGGING_REDACTION_{NAME}_LEVEL (or use the default DEBUG ).

Considerations

Uniqueness of Rule Name

Configurations with the same name, including redaction configurations, override the preceding value. For example, assume an operator has created the following redaction configuration for a service:

Configuration	Value
INRUPT_LOGGING_REDACTION_RULE1_FIELD	userid
INRUPT_LOGGING_REDACTION_RULE1_ACTION	PLAIN

These configurations create a configuration rule that:

• Targets the field userid and

• Uses the PLAIN action, which leaves the userid value as is.

If later on, the operator wants to update the target field to username instead of userid , the operator can update INRUPT_LOGGING_REDACTION_RULE1_FIELD configuration value to username .

With this configuration update, the updated configuration rule now:

• Targets the field username and

• Uses the PLAIN action, which leaves the username value as is.

However, consider if another operator wants to create a new redaction rule for this service. If this operator also uses RULE1 for the {NAME} and decides to use the default replace action, the operator may decide to only set the following configuration:

Configuration	Value
INRUPT_LOGGING_REDACTION_RULE1_FIELD	password

The second operator may assume that with this configuration, the redaction rule will use the default replace action with the default replacement [REDACTED] . Instead, the service has the following configurations in place:

Configuration	Value
INRUPT_LOGGING_REDACTION_RULE1_FIELD	password
INRUPT_LOGGING_REDACTION_RULE1_ACTION	PLAIN

Because the redaction configurations depend on a user-specified {NAME} :

• Ensure the uniqueness of the {NAME} when creating new redaction rules.

• Explicitly specify the action.