On Spring Boot 2.3.4-RELEASE (and earlier versions)
I have an ENV variable to specify additional config file, either a folder or a files works locally (on Windows)
SPRING_CONFIG_ADDITIONAL_LOCATION=C:\temp\
SPRING_CONFIG_ADDITIONAL_LOCATION=C:\temp\application.properties
When running my app in a container, the "folder" value option does not work. The container run on RH Linux, in OpenShift (Kubernetes)
This works
SPRING_CONFIG_ADDITIONAL_LOCATION=/mnt/properties/application.properties
This doesn't
SPRING_CONFIG_ADDITIONAL_LOCATION=/mnt/properties/
When a folder name is used, no properties files get picked up.
How the container differs from my local machine (windows)
- The container in a RH linux
- The folder itself is a mounted config map. I noticed that the files are links
$ cd /mnt/properties
$ ls -al
drwxrwsrwx. 3 root 1001770000 117 Oct 21 17:27 .
drwxr-xr-x. 1 root root 39 Oct 21 15:51 ..
drwxr-sr-x. 2 root 1001770000 64 Oct 21 17:27 ..2020_10_21_21_27_56.823838634
lrwxrwxrwx. 1 root 1001770000 31 Oct 21 17:27 ..data -> ..2020_10_21_21_27_56.823838634
lrwxrwxrwx. 1 root root 29 Oct 21 15:50 application.properties -> ..data/application.properties
I have turned on trace level logs on "org.springframework", but cannot see anything relevant
Comment From: filip-java
I found this : https://github.com/spring-projects/spring-framework/issues/20051 I think this should be supported, as Kubernetes will mount configMap as link
Comment From: wilkinsona
Your configuration on Linux is missing the trailing / that indicates that it is a directory location rather than a file location. The configuration should be the following:
SPRING_CONFIG_ADDITIONAL_LOCATION=/mnt/properties/
Comment From: filip-java
This was a mistake in the description. In the actual setup, it is there. Leaving the "/" out will crash saying it is mandatory
Comment From: scottfrederick
Leaving the "/" out will crash saying it is mandatory
That's only true when including a wildcard in the location. SPRING_CONFIG_ADDITIONAL_LOCATION=/mnt/properties/ will work as expected, SPRING_CONFIG_ADDITIONAL_LOCATION=/mnt/properties/* will cause an error.
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