How to set the log level in Grails 4 - spring-boot

Question

In my Grails 4 app, log.info("log message") doesn't show log, but log.error("log message") does.
How do I change the log level from error to info in Grails 4?

Answer 1

Option 1
All I needed to do was update the application.yml file and added the following to the bottom
logging:
level:
root: INFO
You can also set a single the log level for a single package:
logging:
level:
packageName: INFO
Option 2
Since Grails 4 is based on Spring Boot, I ended up just setting the appropriate environment variable, i.e. logging.level.root=INFO or logging.level.com.mycompany.mypackage=INFO which I did in intellij by editing my run configuration (see below). This way, I can set the logging level differently when I deploy it.

Answer 2

You want to edit grails-app/conf/logback.groovy. Below is what the default file looks like for Grails 4.0.1.
import grails.util.BuildSettings
import grails.util.Environment
import org.springframework.boot.logging.logback.ColorConverter
import org.springframework.boot.logging.logback.WhitespaceThrowableProxyConverter
import java.nio.charset.StandardCharsets
conversionRule 'clr', ColorConverter
conversionRule 'wex', WhitespaceThrowableProxyConverter
// See http://logback.qos.ch/manual/groovy.html for details on configuration
appender('STDOUT', ConsoleAppender) {
encoder(PatternLayoutEncoder) {
charset = StandardCharsets.UTF_8
pattern =
'%clr(%d{yyyy-MM-dd HH:mm:ss.SSS}){faint} ' + // Date
'%clr(%5p) ' + // Log level
'%clr(---){faint} %clr([%15.15t]){faint} ' + // Thread
'%clr(%-40.40logger{39}){cyan} %clr(:){faint} ' + // Logger
'%m%n%wex' // Message
}
}
def targetDir = BuildSettings.TARGET_DIR
if (Environment.isDevelopmentMode() && targetDir != null) {
appender("FULL_STACKTRACE", FileAppender) {
file = "${targetDir}/stacktrace.log"
append = true
encoder(PatternLayoutEncoder) {
charset = StandardCharsets.UTF_8
pattern = "%level %logger - %msg%n"
}
}
logger("StackTrace", ERROR, ['FULL_STACKTRACE'], false)
}
root(ERROR, ['STDOUT'])
The specific change depends on what you really want to do. For example, if you have a controller named demo.SomeController and you want to set its log level to INFO, you could add something like this:
logger 'demo.SomeController', INFO, ['STDOUT'], false
See http://logback.qos.ch/manual/groovy.html for the full config reference.
I hope that helps.

Answer 3

Simple Way:
Update/Replace your grails-app/conf/logback.groovy with following code:
import ch.qos.logback.classic.encoder.PatternLayoutEncoder
appender("FILE", RollingFileAppender) {
file = "logs/FILE-NAME.log"
rollingPolicy(TimeBasedRollingPolicy) {
fileNamePattern = "logs/FILE-NAME-%d{yyyy-MM-dd}.log"
maxHistory = 30
}
encoder(PatternLayoutEncoder) {
pattern = "%d{HH:mm:ss.SSS} %-4relative [%thread] %-5level %logger{35} - %msg%n"
}
}
root(INFO, ["FILE"])
Above solution shows logger level to INFO
You can refer this more details and all log levels.
Hope this will helps you.