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Is it anyway to send startup logs to file, right now all logs up to the statement "Started Application in...." goes to stdout, I want all logging to file.

My logback config: 

<?xml version="1.0" encoding="UTF-8"?> <configuration> <include resource="org/springframework/boot/logging/logback/defaults.xml"/> <property name="LOG_FILE" value="logs/app${PID}.log"/> <appender name="AI-APPENDER" class="com.microsoft.applicationinsights.logback.ApplicationInsightsAppender"> </appender> <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender"> <encoder> <pattern>${FILE_LOG_PATTERN}</pattern> </encoder> <file>${LOG_FILE}</file> <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy"> <fileNamePattern>${LOG_FILE}.%d{yyyy-MM-dd}.%i.gz</fileNamePattern> <maxFileSize>${LOG_FILE_MAX_SIZE:-10MB}</maxFileSize> <maxHistory>30</maxHistory> </rollingPolicy> </appender> <root level="INFO"> <appender-ref ref="FILE"/> <appender-ref ref="AI-APPENDER"/> </root> </configuration>
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    What version of spring-boot are you using? If you want to include the banner in the log you can set spring.main.banner-mode=log in the application.properties. Commented Dec 6, 2018 at 13:41
  • banner is not the problem, want to have startup logs to file Commented Dec 6, 2018 at 14:07
  • It works for me with springboot v 2.1.0 on linux. Can you mention what version you use? Commented Dec 6, 2018 at 16:27
  • yea it seems it is some application insight jar:s that break it, I investigate it right now. Commented Dec 10, 2018 at 8:03
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    the problem was commons-configuration took in commons-logging when I exclude that I start to get logging to file also exclude group: 'commons-logging', module: 'commons-logging' Commented Dec 11, 2018 at 13:38

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You need to configure your logging framework. Assuming you're just using the default from spring-boot then that's LogBack. So have a look at their docs or have a search, there are many useful resources (like this one)

If you add a logback.xml file with the following content to your resources folder you should get logging to both console and file (called application.log) in the same format as you now see for just console.

<configuration> <appender name="FILE" class="ch.qos.logback.core.FileAppender"> <file>application.log</file> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> <encoder> <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern> </encoder> </appender> <root level="info"> <appender-ref ref="FILE" /> <appender-ref ref="STDOUT" /> </root> </configuration>

You probably want to use a RollingFileAppender as this will allow you to create new files when the log file gets big.

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I updated case with my logback config, the problem is that startup logs is not ende up in my app log file, when the application is up and running it works.

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