Create failure analyzer when encrypt.keyStore.* properties in application.yml causes startup failure

Description of problem

If you try to set the encrypt.keyStore.* properties in application.yml, you get the following error:

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-08-28 20:22:00.550 ERROR 31486 --- [ restartedMain] o.s.b.d.LoggingFailureAnalysisReporter :

APPLICATION FAILED TO START

Description:

Field rsaProperties in org.springframework.cloud.config.server.config.EncryptionAutoConfiguration$KeyStoreConfiguration required a bean of type 'org.springframework.cloud.bootstrap.encrypt.RsaProperties' that could not be found.

Action:

Consider defining a bean of type 'org.springframework.cloud.bootstrap.encrypt.RsaProperties' in your configuration.

Resources

There is a question on stackoverflow of someone else having a similar issue.

Work-around

Move the encrypt.keyStore.* properties to bootstrap.yml

Code to reproduce the issue

https://github.com/mjohns39/ResumeWebsiteApi/tree/spring-cloud-rsa-issue

Start by reproducing the startup failure with the encrypt.keyStore.* properties in application.yml, using the linked ResumeWebsiteApi example. Read EncryptionAutoConfiguration$KeyStoreConfiguration and the missing RsaProperties dependency, then compare the failure with the existing bootstrap.yml workaround. Done means the failure is reported with a useful analyzer message instead of only the missing-bean error.