Скачать или смотреть Resolving the Issue with azure-spring-boot-starter-keyvault-secrets in PCF

Learn how to fix application startup errors related to `azure-spring-boot-starter-keyvault-secrets` in Azure Spring Boot when running on PCF.
---
This video is based on the question https://stackoverflow.com/q/68481098/ asked by the user 'Venu' ( https://stackoverflow.com/u/2850801/ ) and on the answer https://stackoverflow.com/a/68661410/ provided by the user 'Venu' ( https://stackoverflow.com/u/2850801/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: azure-spring-boot-starter-keyvault-secrets not resolving vcap service variables during application startup in PCF

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Fixing azure-spring-boot-starter-keyvault-secrets Startup Issues in PCF

Upgrading applications can often present challenges, especially when it comes to integrating with services like Azure Key Vault. In this guide, we will tackle a common issue faced by developers: how to resolve service variable resolution failures with azure-spring-boot-starter-keyvault-secrets during application startup in the Pivotal Cloud Foundry (PCF) environment.

Background

Recently, several users reported difficulties when upgrading their applications from an older version of azure-key-vault to a newer version compatible with Azure’s BOM. This upgrade process resulted in applications failing to start correctly on PCF, with errors indicating that they could not configure the Key Vault property source and manage identity credentials.

Common Scenario

For instance, a developer made changes to their pom.xml file, replacing older dependencies with the new Azure Spring Boot Key Vault starter. Despite updated configurations, the application wouldn't resolve certain required properties, leading to runtime exceptions.

Example Configuration Before Upgrade

[[See Video to Reveal this Text or Code Snippet]]

Example Configuration After Upgrade

[[See Video to Reveal this Text or Code Snippet]]

Initially, the application was able to read properties defined in the application.properties file, such as:

[[See Video to Reveal this Text or Code Snippet]]

However, with the upgrade, these properties caused the application to fail during startup with an error indicating:

[[See Video to Reveal this Text or Code Snippet]]

Solution

After some troubleshooting, the root cause of the issue was identified: Camel case properties in the application.properties file. Specifically, the properties were defined as clientId and clientKey, which did not match the expected lowercase format that Spring Boot utilizes when processing keys.

Fixing the Property Names

To resolve this issue, the developer updated their application properties to use lowercase for the placeholders, as shown below:

[[See Video to Reveal this Text or Code Snippet]]

Note: The service bindings in the PCF settings retain the camel case naming. However, Spring Boot automatically converts keys to lowercase during processing. Hence, aligning the application properties with the expected format resolved the startup problem.

Conclusion

Upgrading to the latest versions of dependencies can occasionally lead to difficulties, but meticulous attention to configuration properties can save headaches. By ensuring property keys adhere to the expected format, we can prevent issues during application startup. This small change allowed the application to successfully access the Key Vault, leading to a seamless upgrade process.

If you encounter similar issues during upgrades or integrations, reviewing property naming conventions might just be the key to resolving them.

Happy coding!