Discovery log files
This page describes the log files generated by the Discovery server.
Overview
Discovery server is built on the Spring Boot framework and uses the Logback logging library by default.
For detailed information on logging in Spring Boot applications, see Spring Boot Logging.
Logging configuration
By default, Discovery is configured to log to logs/discovery.log. The log file is rolled at 10MB and a maximum of 7 rolled files are retained.
Changing the default configuration
Discovery’s logging is configured in the Spring Boot config/application.properties file.
| Configuration | Description | Default value |
|---|---|---|
Path to log file |
logs/discovery.log |
|
Maximum number of rolled files to retain |
7 |
|
Log file rolling trigger |
10MB |
|
Logging level of root logger |
INFO |
Overriding logging configuration on the command line
The discovery.sh control script accepts Spring Boot configuration options on the command line, which override settings in config/application.properties:
$ ./discovery.sh start --logging.file.max-size=5MB
Logging in container-based deployments
In container-based deployments it is common practice to run applications in the foreground and log to STDOUT, delegating log file management to the container orchestrator.
The discovery.sh control script’s start command has a -f option that runs Discovery as a foreground process and logs to STDOUT:
$ discovery.sh start -f