How do I change the values of application.yaml at runtime?

Question

How do I change the values of application.yaml at runtime e.g I have a server address property that I would like to change at runtime

server: address: 192.168.1.100

Ideally you might have a config server who provides all configs, you can take a look https://www.baeldung.com/spring-cloud-configuration — Jonathan JOhx, Aug 02 '19 at 15:33
Possible duplicate of [Set/override Spring / Spring Boot properties at runtime](https://stackoverflow.com/questions/27919270/set-override-spring-spring-boot-properties-at-runtime) — Arthur Attout, Aug 02 '19 at 15:36

score 3 · Accepted Answer · answered Aug 02 '19 at 15:38

3

I assume this is a spring application, if so you can use the jvm arguments (-D) to override the values from application.yaml file. e.g application.yaml

server:
  address: 192.168.0.1

cmd line

java -jar -Dserver.address=10.10.0.1

answered Aug 02 '19 at 15:38

Oga Technology

46
2

Thats not really runtime :D thats property on startup! – Michael Michailidis Aug 02 '19 at 16:00

score 0 · Answer 2 · answered Aug 02 '19 at 16:28

If you need to override many properties you can also use a separate file

@SpringBootApplication
@PropertySources({
        @PropertySource(name = "default", value = "classpath:default.yaml"),
        @PropertySource(name = "external", value = "file:${custom.properties:}", ignoreResourceNotFound = true)
})
public class BootApplication { ... }

And launch like

java -jar -Dcustom.properties=/path/to/custom.yaml

Where custom.yaml contains

server: 
   address: 10.10.10.100
   port: 8888
   etc: blabla
   ...

How do I change the values of application.yaml at runtime?

2 Answers2