How to override application properties during production in Spring-Boot

Question

I m using spring boot and application properties to select a database during development by  Configuration  Profile  dev     spring profiles active dev spring config location file d  application properties   During production I d like to create a file outside of the application context that should be loaded and then active a different configuration profile  with d  application properties   spring profiles active production   Result  when I start the app  the configuration is still dev  so somehow the additional location of the productive properties file is not taken into account  Am I missing anything   spring boot 1 1 0 BUILD-SNAPSHOT  Note  this question is NOT about tomcat

User · Answer

I have found the following has worked for me:

java -jar my-awesome-java-prog.jar --spring.config.location=file:/path-to-config-dir/

with file: added.

LATE EDIT

Of course, this command line is never run as it is in production.

Rather I have

[possibly several layers of] shell scripts in source control with place holders for all parts of the command that could change (name of the jar, path to config...)
ansible deployment scripts that will deploy the shell scripts and replace the place holders by the actual value.

User · Answer

From Spring Boot 2  you will have to use   --spring config additional-location production properties

User · Answer

I am not sure you can dynamically change profiles   Why not just have an internal properties file with the spring config location property set to your desired outside location  and the properties file at that location  outside the jar  have the spring profiles active property set   Better yet  have an internal properties file  specific to dev profile  has spring profiles active dev  and leave it like that  and when you want to deploy in production  specify a new location for your properties file  which has spring profiles active prod   java -jar myjar jar --spring config location D  wherever application properties

User · Answer

UPDATE  this is a bug in spring see here  the application properties outside of your jar must be in one of the following places  then everything should work   21 2 Application property files SpringApplication will load properties from application properties files in the following    locations and add them to the Spring Environment   A  config subdir of the current directory  The current directory A classpath  config package The classpath root   so e g  this should work  when you dont want to specify cmd line args and you dont use spring config location in your base app props   d  yourExecutable jar d  application properties  or  d  yourExecutable jar d  config application properties   see spring external config doc  Update  you may use   Configuration together with   PropertySource  according to the doc here you can specify resources anywhere  you should just be careful  when which config is loaded to make sure your production one wins

User · Answer

I know you asked how to do this  but the answer is you should not do this   Instead  have a application properties  application-default properties application-dev properties etc   and switch profiles via args to the JVM  e g  -Dspring profiles active dev  You can also override some things at test time using  TestPropertySource  Ideally everything should be in source control so that there are no surprises e g  How do you know what properties are sitting there in your server location  and which ones are missing  What happens if developers introduce new things   Spring Boot is already giving you enough ways to do this right   https   docs spring io spring-boot docs current reference html boot-features-external-config html

User · Answer

Update with Spring Boot 2 2 2 Release   Full example here  https   www surasint com spring-boot-override-property-example   Assume that  in your jar file  you have the application properties which have these two line   server servlet context-path  test server port 8081   Then  in production  you want to override the server port 8888 but you don t want to override the other properties    First you create another file  ex override properties and have online this line   server port 8888   Then you can start the jar like this  java -jar spring-boot-1 0-SNAPSHOT jar --spring config location classpath application properties  opt somewhere override properties

User · Answer

You can also use  PropertySources   PropertySources            PropertySource value    classpath application properties             PropertySource value    file  user home external properties   ignoreResourceNotFound   true     public class Application       public static void main String   args  throws Exception           ConfigurableApplicationContext context   SpringApplication run Application class  args

User · Answer

The spring configuration precedence is as follows    ServletConfig init Parameter ServletContext init parameter JNDI attributes  System getProperties     So your configuration will be overridden at the command-line if you wish to do that  But the recommendation is to avoid overriding  though you can use multiple profiles

[java] How to override application.properties during production in Spring-Boot?

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