How to externalise spring application configuration using config server? - spring

Question

I have written my own config server to centralise configuration management and exposing application configuration using APIs. Now i want to consume configuration properties from spring and spring-boot applications. But i am not able to figure out the correct way for that. I tried placing my config server client code to listen for application context start event and reading configuration from config server. But i am not able to inject this configuration into other beans.
How can i read application configuration from config server (using rest client) and inject this read config to application environment for further processing ?

Answer 1

create an application that for config and your application
#SpringBootApplication
#EnableConfigServer
public class ConfigApplication {
public static void main(String[] args) throws Exception {
SpringApplication.run(ConfigApplication.class, args);
}
}
application.yml in config server
spring:
cloud:
config:
server:
native:
search-locations: classpath:/shared
profiles:
active: native
security:
user:
password: pass
server:
port: 8888
and create shared folder in src/main/resources/shared and your-service.yml like this
spring:
security:
basic:
enabled: false
server:
port: 8083
maven pom.xml in config server
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
</parent>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>Camden.SR5</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-config-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<finalName>config</finalName>
</configuration>
</plugin>
</plugins>
</build>
in your-service spring boot application add /src/main/resources/bootstrap.yml
like this
spring:
application:
name: your-service
cloud:
config:
uri: http://localhost:8888
fail-fast: true
username: user
password: pass
and add this dependency to your service
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-config</artifactId>
</dependency>
first run config server and then your spring boot service