Apache Flink® clusters have a default Apache Log4j® configuration. It is possible to customize the generated logging configuration as described on this page.
You can configure log levels for individual loggers via the log4jLoggers attribute:
kind: SessionCluster spec: logging: log4jLoggers: "": INFO # Root log level com.company: DEBUG # Log level of com.company
The root log level is configured by using the empty string
"" as key.
Logging profiles are Log4j configuration templates pre-configured by the Ververica Platform administrator. A profile named
default is always available.
kind: SessionCluster spec: logging: loggingProfile: default
In general, you should expect the Ververica Platform administrator to set up the default logging profile as required by your environment.
Please consult the Logging & Metrics documentation for more details on how to configure logging profiles.
The Log4j configuration template gives you full control over the Apache Log4j® configuration of your Flink cluster in case that the logging profile does not provide enough flexibility.
kind: SessionCluster spec: logging: log4j2ConfigurationTemplate: | <?xml version="1.0" encoding="UTF-8" standalone="no"?> <Configuration xmlns="http://logging.apache.org/log4j/2.0/config" strict="true"> ... </Configuration>
Custom Log4j templates follow the XML configuration format of Log4j and have higher precedence than a configured profile.
Please consult the Logging & Metrics documentation for more details on how to configure Log4j templates.