[KARAF-2466] make it easy to access environment variables inside karaf configuration properties files - via ${ENV.foo}?

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: karaf
• Assignee: Jean-Baptiste Onofré
• Reporter: James Strachan
• Created: 09/Sep/13 15:21
• Updated: 14/Sep/18 08:35
• Resolved: 12/Jan/16 09:52

Description

when using karaf in clouds & PaaS infrastructures like OpenShift, Docker, OpenStack et al; its common to use environment variables to pass in environment specific values; then keep a single disk image. It would be nice if there was an easy way to reference environment variables similar to the ${foo.bar} syntax for accessing system properties.

Maybe karaf should support some kind of environment variable expansion like

# define a property based on an env var
foo = ${ENV.nameOfEnvVar} 

# e.g. here's the host name
host = ${ENV.HOSTNAME} 

Issue Links

• is related to: KARAF-3434 Support env:XXX subtitution for environment variables