使用外部 tomcat 时如何覆盖 application.yml 中的属性？

Question

I deploy my app in external tomcat as a WAR file because there are multiple applications run on the same tomcat.

In my application.yml inside resources directory, I have (among other properties):

logging:
   file: MY_APP.log

I want to override this value when the app will run into external tomcat. I created application-myapp.yml into CATALINA_BASE/conf/application-myapp.yml with the following contents:

logging:
   file: ${catalina.base}/logs/MY_APP.log

And in my main class:

@SpringBootApplication
@PropertySource({"classpath:application.yml", "file:${catalina.base}/conf/application-myapp.yml"})
public class MyApp extends SpringBootServletInitializer{

}

but the value is not overriden and MY_APP.log is created in /bin directory where I execute startup.bat which means the logging.file property is not overriden by conf/application-myapp.yml .

NOTE that I need this for some other properties. Like JDBC url, etc. logging.file is just an example!

What I want is to have a permanent application-myapp.yml into tomcat/conf directory with some properties configured to work in production. These values to override the ones (where property exists in both config files) from resources/application.yml .

I tried a lot of things. I tried also to have .properties file, but no luck. I also tried the following:

@PropertySources(
   @PropertySource("classpath:application.yml"),
   @PropertySource(value = "file:${catalina.base}/conf/application-myapp.yml", ignoreResourceNotFound = true)
)

but still...no luck. I also tried different order in @PropertySource annotations.

How can I achieve this in Spring Boot 1.5.8.RELEASE version?

For example, if I have:

resources/application.yml:

property1: value1
property2: value2
property3: value3

CATALINA_BASE/conf/application-myapp.yml:

property2: value4

Application will start:

property1: value1
property2: value4 #<-- here, overriden by application-myapp.yml
property3: value3

Answer 1

To use the external config, try setting the SPRING_CONFIG_LOCATION environment variable like below:

export SPRING_CONFIG_LOCATION=${catalina.base}/conf/application-myapp.yml