ConfigReloadUtil does not use sources listed in env specific yml files

[bajibalu]

Describe the bug
I am trying to use config map to override some configs in my spring app. When I keep all the configurations in application.yml file the context gets reloaded and the values in the kubernetes config-map replaces the default config values in application.yml.

bootstrap.yaml

spring:
  application:
    name: spring-cm
  cloud:
    kubernetes:
      config:
        enabled: true

application.yml

spring:
  main:
    cloud-platform: kubernetes
  application:
    name: spring-cm
  profiles:
    active: dev
  cloud:
    kubernetes:
      config:
        namespace: spring-apps
        name: app-config-overrides
      reload:
        enabled: true
        monitoring-config-maps: true
        strategy: refresh
        mode: polling
  config:
    import: "kubernetes:"

springapp:
  cm:
    direct-message: "YAML: Hello!!!"
    app-yaml-message: "YAML: Hello!!!"
    numberVar: 2
    numberVal: 2

The logs below confirm that the above configuration is correct.

2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.client.config.KubernetesClientConfigMapsCache message=Loaded all config maps in namespace 'spring-apps'
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.ConfigUtils message=Found source with name : 'app-config-overrides' in namespace: 'spring-apps'
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.SourceDataEntriesProcessor message=The single property with name: [application.yaml] will be treated as a yaml file
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.beans.factory.config.YamlPropertiesFactoryBean message=Loading from YAML: Byte array resource [resource loaded from byte array]
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.beans.factory.config.YamlPropertiesFactoryBean message=Matched document with default matcher: {springapp.cm={appYamlMessage=ConfigMap: Hello v1!!!, directMessage=ConfigMap: Hello!!!}}
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.beans.factory.config.YamlPropertiesFactoryBean message=Loaded 1 document from YAML resource: Byte array resource [resource loaded from byte array]
2025-01-17 18:43:28 level=WARN   logger=org.springframework.cloud.kubernetes.commons.config.ConfigUtils message=sourceName : app-config-overrides-dev was requested, but not found in namespace : spring-apps
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator message=Adding config map property source configmap.app-config-overrides.spring-apps
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator message=paths property sources : []
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=environment from locateMapPropertySources : ApplicationServletEnvironment {activeProfiles=[dev], defaultProfiles=[default], propertySources=[MapPropertySource@1620993234 {name='server.ports', properties={local.server.port=8080}}, ConfigurationPropertySourcesPropertySource@1289744459 {name='configurationProperties', properties=org.springframework.boot.context.properties.source.SpringConfigurationPropertySources@1d9bf948}, StubPropertySource@122474156 {name='servletConfigInitParams', properties=java.lang.Object@d85d5f2}, ServletContextPropertySource@1055601057 {name='servletContextInitParams', properties=org.apache.catalina.core.ApplicationContextFacade@7c78ce8d}, PropertiesPropertySource@488658432 {name='systemProperties', properties={java.specification.version=21, sun.jnu.encoding=UTF-8, 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LOGNAME=bbalu, DB_HOME=/Users/bbalu/work/db, SERVICEMIX_HOME=/Users/bbalu/work/servers/servicemix-7.0.1, __CF_USER_TEXT_ENCODING=0x1F6:0x0:0x0, XPC_FLAGS=0x0, spring.cloud.kubernetes.client.namespace=spring-apps, SOURCE_ROOT=/Users/bbalu/work/workspace/tls/lpas/lpas-grid, P4CONFIG=/Users/bbalu/work/bin/p4.ini, LC_CTYPE=en_US.UTF-8, GRADLE_USER_HOME=/Users/bbalu/work/repo/gradle, CATALINA_HOME=/Users/bbalu/work/servers/tomcat-8.0.26-x64, GEMFIRE_BASE=/Users/bbalu/work/servers/gemfire_820_b17919_linux/deploy, WORK_BIN=/Users/bbalu/work/bin, SSH_AUTH_SOCK=/private/tmp/com.apple.launchd.rcHYvfWEr0/Listeners, OLDPWD=/, WORK_HOME=/Users/bbalu/work, XPC_SERVICE_NAME=application.com.jetbrains.intellij.759892.759898, spring_debug=-Dspring-boot.run.jvmArguments="-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=5005", USER=bbalu, HOMEBREW_CELLAR=/opt/homebrew/Cellar, GRADLE_HOME=/Users/bbalu/work/tools/gradle/7.6, PWD=/Users/bbalu/work/workspace/my-apps/spring-configmap-example}}, RandomValuePropertySource@195022150 {name='random', properties=java.util.Random@113ff4e9}, CachedRandomPropertySource@70164941 {name='cachedrandom', properties=RandomValuePropertySource@195022150 {name='random', properties=java.util.Random@113ff4e9}}, CompositePropertySource {name='composite-configmap', propertySources=[KubernetesClientConfigMapPropertySource@1879071388 {name='configmap.app-config-overrides.spring-apps', properties={springapp.cm.directMessage=ConfigMap: Hello!!!, springapp.cm.appYamlMessage=ConfigMap: Hello!!!}}]}, CompositePropertySource {name='composite-secrets', propertySources=[]}, OriginTrackedMapPropertySource@83909671 {name='Config resource 'class path resource [application.yml]' via location 'optional:classpath:/'', properties={spring.main.cloud-platform=kubernetes, spring.application.name=spring-cm, spring.profiles.active=dev, spring.cloud.kubernetes.config.namespace=spring-apps, spring.cloud.kubernetes.config.name=app-config-overrides, spring.cloud.kubernetes.reload.enabled=true, spring.cloud.kubernetes.reload.monitoring-config-maps=true, spring.cloud.kubernetes.reload.strategy=refresh, spring.cloud.kubernetes.reload.mode=polling, spring.config.import=kubernetes:, springapp.cm.direct-message=YAML: Hello!!!, springapp.cm.app-yaml-message=YAML: Hello!!!, springapp.cm.numberVar=2, springapp.cm.numberVal=2, management.endpoints.web.exposure.include=info,health,metrics,loggers,refresh,beans,heapdump}}, MapPropertySource@1802922194 {name='springCloudClientHostInfo', properties={spring.cloud.client.hostname=172.17.40.151, spring.cloud.client.ip-address=172.17.40.151}}, ApplicationInfoPropertySource@438799544 {name='applicationInfo', properties={spring.application.pid=46233}}, @1877436809 {name='Management Server', properties=java.lang.Object@370fbc5f}]}
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=sources from locateMapPropertySources : [KubernetesClientConfigMapPropertySource@1074030799 {name='configmap.app-config-overrides.spring-apps', properties={springapp.cm.directMessage=ConfigMap: Hello!!!, springapp.cm.appYamlMessage=ConfigMap: Hello v1!!!}}]
2025-01-17 18:43:28 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=found change in : KubernetesClientConfigMapPropertySource@1074030799 {name='configmap.app-config-overrides.spring-apps', properties={springapp.cm.directMessage=ConfigMap: Hello!!!, springapp.cm.appYamlMessage=ConfigMap: Hello v1!!!}}
2025-01-17 18:43:28 level=INFO   logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=Detected change in config maps/secrets, reload will ne triggered
2025-01-17 18:43:28 level=INFO   logger=org.springframework.cloud.kubernetes.commons.config.reload.PollingConfigMapChangeDetector message=Detected change in config maps
2025-01-17 18:43:28 level=INFO   logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigurationChangeDetector message=Reloading using strategy: REFRESH

However, I would like to have different config-maps for different environments like test and prod. But it looks like org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil does not use the spring.cloud.kubernetes.config.name or spring.cloud.kubernetes.config.sources[].name from environment specific yml files. When I remove the config.name from application.yml and add the same (and/or config.sources[].name) to environment specific yml file like below, the ConfigReloadUtil does not detect the changes in the config map.

application-dev.yml

spring:
  cloud:
    kubernetes:
      config:
        enabled: true
        name: app-configs-overrides
        sources:
          - name: app-config-overrides

Below log shows the context is not getting reloaded but I have updated the config map.

2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.client.config.KubernetesClientConfigMapsCache message=Loaded all config maps in namespace 'spring-apps'
2025-01-17 18:47:10 level=WARN   logger=org.springframework.cloud.kubernetes.commons.config.ConfigUtils message=sourceName : spring-configmap-example was requested, but not found in namespace : spring-apps
2025-01-17 18:47:10 level=WARN   logger=org.springframework.cloud.kubernetes.commons.config.ConfigUtils message=sourceName : spring-configmap-example-dev was requested, but not found in namespace : spring-apps
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.NamedSourceData message=Will return empty source with name : configmap.spring-configmap-example.spring-apps
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator message=Adding config map property source configmap.spring-configmap-example.spring-apps
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.ConfigMapPropertySourceLocator message=paths property sources : []
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=environment from locateMapPropertySources : ApplicationServletEnvironment {activeProfiles=[dev], defaultProfiles=[default], propertySources=[MapPropertySource@393666918 {name='server.ports', properties={local.server.port=8080}}, ConfigurationPropertySourcesPropertySource@34964233 {name='configurationProperties', properties=org.springframework.boot.context.properties.source.SpringConfigurationPropertySources@371887f0}, StubPropertySource@1351092924 {name='servletConfigInitParams', properties=java.lang.Object@3ebc4019}, ServletContextPropertySource@278892812 {name='servletContextInitParams', properties=org.apache.catalina.core.ApplicationContextFacade@63cba3e8}, PropertiesPropertySource@1929808071 {name='systemProperties', properties={java.specification.version=21, sun.jnu.encoding=UTF-8, 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-core-6.2.1.jar:/Users/bbalu/work/repo/mvn/org/springframework/spring-jcl/6.2.1/spring-jcl-6.2.1.jar, 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RandomValuePropertySource@538801132 {name='random', properties=java.util.Random@9208a31}, CachedRandomPropertySource@1340311644 {name='cachedrandom', properties=RandomValuePropertySource@538801132 {name='random', properties=java.util.Random@9208a31}}, OriginTrackedMapPropertySource@1906400407 {name='Config resource 'class path resource [application-dev.yml]' via location 'optional:classpath:/'', properties={spring.cloud.kubernetes.config.enabled=true, spring.cloud.kubernetes.config.name=app-configs-overrides, spring.cloud.kubernetes.config.sources[0].name=app-config-overrides}}, CompositePropertySource {name='composite-configmap', propertySources=[KubernetesClientConfigMapPropertySource@988336988 {name='configmap.spring-configmap-example.spring-apps', properties={}}]}, CompositePropertySource {name='composite-secrets', propertySources=[]}, OriginTrackedMapPropertySource@932489010 {name='Config resource 'class path resource [application.yml]' via location 'optional:classpath:/'', properties={spring.main.cloud-platform=kubernetes, spring.application.name=spring-configmap-example, spring.profiles.active=dev, spring.cloud.kubernetes.config.namespace=spring-apps, spring.cloud.kubernetes.reload.enabled=true, spring.cloud.kubernetes.reload.monitoring-config-maps=true, spring.cloud.kubernetes.reload.strategy=refresh, spring.cloud.kubernetes.reload.mode=polling, spring.config.import=kubernetes:, springapp.cm.direct-message=YAML: Hello!!!, springapp.cm.app-yaml-message=YAML: Hello!!!, springapp.cm.numberVar=2, springapp.cm.numberVal=2, management.endpoints.web.exposure.include=info,health,metrics,loggers,refresh,beans,heapdump}}, MapPropertySource@1692821748 {name='springCloudClientHostInfo', properties={spring.cloud.client.hostname=172.17.40.151, spring.cloud.client.ip-address=172.17.40.151}}, ApplicationInfoPropertySource@525915419 {name='applicationInfo', properties={spring.application.pid=49574}}, @1902707184 {name='Management Server', properties=java.lang.Object@261f76e1}]}
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=sources from locateMapPropertySources : [KubernetesClientConfigMapPropertySource@688892737 {name='configmap.spring-configmap-example.spring-apps', properties={}}]
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=no changes found, reload will not happen
2025-01-17 18:47:10 level=DEBUG  logger=org.springframework.cloud.kubernetes.commons.config.reload.ConfigReloadUtil message=Reloadable condition was not satisfied, reload will not be triggered

Could someone please help me fix this issue?

Environment:

Java: 21.0.2
Spring: 6.2.1
Spring Boot: 3.4.1
Spring Cloud kube client: 3.2.0

Sample
Link to sample app: https://gitlab.com/baji/spring-configmap-example

[bajibalu]

Could someone please take a look at this issue? Please let me know if there is anything I can help to investigate and fix it.

[wind57]

I'll take a look over the weekend and report back.

[wind57]

Let's see if I understood your issue (I did not look at your sample just yet).

• I doubt you need bootstrap.yaml to begin with, I bet you have such a property in application.yaml: spring.config.import: kubernetes... if you do, then you don't actually need bootstrap.yaml. Try removing it and see it the app still starts.

However, I would like to have different config-maps for different environments like test and prod.

Understandable. This is what Spring's active profiles is for and in our case: spring.cloud.kubernetes.config.includeProfileSpecificSources=true. This will tell the app to read (if it exists) a "profile specific source, besides the default one".

For example:

spring:
  application:
    name: named-configmap-with-profile
  cloud:
    kubernetes:
      config:
        enableApi: true
        includeProfileSpecificSources: true
        sources:
          - name: my-configmap

If you have a configmap called : my-configmap, it will be read. If your active profile is dev and you have a config map called my-configmap-dev, it will be read also. Just like application.yaml and application-dev.yaml in a usual Spring application.

It looks like this is what you really want to use here.

---

The other side of the question is what we are "tracking", or what is ConfigReloadUtil based on. What we listen for is namespaces (I would advise you to read "Namespace Resolution" part of the documentation). If you want to be precise, use the explicit way to tell us what namespaces you want to listen for, via:

spring.cloud.kubernetes.reload.namespaces

This way we will listen for changes in all those namespaces and on all configmaps. If you want specific configmaps to be listened for, there is a way to do that also:

spring.cloud.kubernetes.reload.enableReloadFiltering=true

and we will listen only for changes in configmaps that have the label :

spring.cloud.kubernetes.config.informer.enabled=true

I hope this makes sense. If after these changes things still don't work as expected, change the sample with some instructions how to re-produce and I'll take a look.

Thank you.

[wind57]

@ryanjbaxter can you please add the feedback label?

[spring-cloud-issues]

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.

[bajibalu]

Hi @wind57 Thanks for taking a look. Setting includeProfileSpecificSources flag to true and having configMaps matching profile name works. With earlier versions of the spring-cloud I was able to provide a configmap source name in each application-.yaml file. Is this still available with current version?

[wind57]

hey, really glad it worked for you. Let's take one step at a time if you do not mind. If the initial query is solved, I would prefer if we close this ticket and, if you still have any questions, open a new one.

TBH, I don't really understand your last question... so may be you can provide a sample or more details. Thank you

[bajibalu]

Thanks for the quick response. With earlier versions of the spring-cloud I was able to provide a configmap source name in each application-<profile>.yaml file like below. Wondering if this is still available with current version? This was the original issue I was reporting here.

application.yaml

...
spring:
  cloud:
    kubernetes:
      config:
        enabled: true
        name: app-configs-overrides
...

application-prod-client1.yaml

...
spring:
  cloud:
    kubernetes:
      config:
        name: app-configs-overrides-client1
...

[wind57]

so you were specifying which configmap to read via separate yaml files. So in application.yaml, you were saying : "load app-configs-overrides"; and in application-prod-client1.yaml you were saying : "load app-configs-overrides-client1".

That makes sense too :) and I don't see why that would not work. Reload should work with these too. Is that not what you are seeing in your app?

1. I mean, let's say your active profile is application-prod-client1, as such, we will read app-configs-overrides-client1 configmap. From what I understand, this happens.

2. after you change application-prod-client1, reload of the app does not work and this is the issue you are reporting, right?

Please correct me if I'm wrong here. Thank you

[bajibalu]

Reload should work with these too. Is that not what you are seeing in your app?

Yes. Thats is not working for me. I tried having different source names in different application.yaml and application-dev.yaml files. Spring reads only from the source mentioned in application.yaml but not application-dev.yaml. Thats the example I gave above in my original post. you can reproduce the same with the example app I have linked.

I mean, let's say your active profile is application-prod-client1, as such, we will read app-configs-overrides-client1 configmap. From what I understand, this happens.

Let me quickly test this.

after you change application-prod-client1, reload of the app does not work and this is the issue you are reporting, right?

I don't understand what do you mean.

[bajibalu]

application.yaml

  profiles:
    active: prod-client1
  cloud:
    kubernetes:
      config:
        enabled: true
        include-profile-specific-sources: true
        namespace: spring-apps
        name: app-config-overrides

application-prod-client1.yaml

cloud.kubernetes.config:
  namespace: spring-apps
  name: app-config-overrides-client1

With above config, the app loads values from

• app-config-overrides ConfigMap when app-config-overrides-prod-client1 ConfigMap does not present
• app-config-overrides-prod-client1 ConfigMap when it is present

but does not load values from app-config-overrides-client1 or app-config-overrides-client1-prod-client1 ConfigMaps.

When I delete the name: app-config-overrides from application.yaml, I was expecting spring to use app-config-overrides-client1 ConfigMap but ConfigMap is not getting loaded at all. This confirms that name is only taken from application.yaml but not from application-\<profile\>.yaml files.

[wind57]

I will create a sample of my own (will share with you, of course) and see what is going on here. Though, as you have seen, there are other ways we recommend doing.

[bajibalu]

Thank you so much.

[wind57]

here is a PR against a project that I maintain that proves that things are correctly read: wind57/spring-k8s-samples#2

Basically clone this repo, switch to that branch and follow the README.

The above is using bootstrap to load stuff.

---

What you are using in your code, is the new way to load things, called "config data", and to my surprise, we might have a bug there : #1874

Either way, imho, this ticket can be closed. You have two solutions to work around your initial problem.

Thank you.

[bajibalu]

Hi @wind57 thanks much for taking time to test it out. I took a look at your changes. I think your app loads sample-configmap-dev because the source name (sample-configmap-dev) follows the <configmap source name from bootstrap.yaml>-<active profile> and includeProfileSpecificSources is by default true. If you use sample-test-configmap in bootstrap-dev.yaml it will not load configs from sample-test-configmap configmap. This is what the issue I was reporting here. In my sample code application.yaml and application-dev.yaml will have different configmap names and spring does not load from the configmap mentioned in application-dev.yaml. It used to work in older versions of spring-cloud but not in 3.x. Basically I would expect spring-cloud to use sources names configured in application-<profile>.yaml. Please let me know if you think otherwise.

[wind57]

Did you actually try the changes you are implying above? I pushed new changes in the same branch that proves otherwise, please take a look.

[wind57]

@ryanjbaxter can you add the feedback label back please?

[spring-cloud-issues]

If you would like us to look at this issue, please provide the requested information. If the information is not provided within the next 7 days this issue will be closed.