Spring cloud config client properties are not getting resolved

Question

I am very new to the concept of Spring Cloud and Spring external configurations, in fact started yesterday itself.

I have created one Config Server picking the configurations from a local Git repository, one micro service which is also the config client and one Eureka driven service discovery server.

Below is the code that i have mostly borrowed from various resources across internet -

Config Server - application.yml:

server:
  port: 8888

spring:
  cloud:
    config:
      server:
        git:
          uri: file:///${user.home}/config-repo

Config Server - Main class (bootstrap)

@EnableConfigServer
@SpringBootApplication
public class CloudConfigServerApplication {

    public static void main(String[] args) {
        SpringApplication.run(CloudConfigServerApplication.class, args);
    }
}

config-repo is the local git repo on my machine and has got a .yml file with name of the config client application i.e. authmanager.yml

eureka:
    client:
        serviceUrl:
            defaultZone: http://127.0.0.1:8761/eureka/
        healthcheck:
            enabled: true
        lease:
            duration: 5
spring:
    application:
        data:   
            mongodb:
                host: localhost
                port: 27017
                database: edc_mc
logging:
    level:
        org.exampledriven.eureka.customer.shared.CustomerServiceFeignClient: FULL

Now after running the config server, below is the output of the end point http://localhost:8888/authmanager/default -

{"name":"authmanager","profiles":["default"],"label":"master","version":"0ca6ca7b4502b9bb6ce1bf8efeb25516682cf79a","propertySources":[{"name":"file:///C:\\Users\\username/config-repo/authmanager.yml","source":{"eureka.client.serviceUrl.defaultZone":"http://127.0.0.1:8761/eureka/","eureka.client.healthcheck.enabled":true,"eureka.client.lease.duration":5,"spring.application.data.mongodb.host":"localhost","spring.application.data.mongodb.port":27017,"spring.application.data.mongodb.database":"db_name","logging.level.org.exampledriven.eureka.customer.shared.CustomerServiceFeignClient":"FULL"}}]}

Micro service + Config client code -

bootstrap.yml -

server:
  port: 9097

spring:
  application:
    name: authmanager
  cloud:
    config:
      uri: http://localhost:8888

Client - Main class (bootstrap) -

@SpringBootApplication
@EnableDiscoveryClient
@EnableWebMvc
public class CloudLoginManagerApplication {

    public static void main(String[] args) {
        SpringApplication.run(CloudLoginManagerApplication.class, args);
    }
}

Controller class in the config client, where i want to use the configuration file properties -

@RefreshScope
@RestController
@RequestMapping("/auth")
public class MyController {

    @Value("${spring.application.data.mongodb.database}")
    String env_var;

Skipping rest of the code for clarity sake.

This is the error i am getting -

Could not resolve placeholder 'spring.application.data.mongodb.database' in string value "${spring.application.data.mongodb.database}"

Other properties like server.port is not giving issues.

I have also tried the Environment interface way, but thats returning null as well.

Any pointers please, i have almost reached dead end now.

Thanks,

AJ

Answer 1

1-if you using maven, add this dependency:

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-config</artifactId>
</dependency>

2-if you using gradle, add this dependency:

dependencies {
    implementation 'org.springframework.cloud:spring-cloud-starter-config'
}

3- refrech

Answer 2

In my case, I add the spring-cloud version in the properties section.

1 : Add spring cloud version:

<properties>
        <java.version>1.8</java.version>
        <spring-cloud.version>2021.0.1</spring-cloud.version>
    </properties>

2 : dependencyManagement below of the <dependencies>

  <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

Answer 3

To enable cloud config you have to add the spring-cloud-starter-config to your dependencies. You can verify by checking the /env (might need to add actuator) to see which properties are available.

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-config</artifactId>
</dependency>