[FLUME-2993] Support environment variables in configuration files

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.8.0
• Component/s: Configuration
• Assignee: Balázs Donát Bessenyei
• Reporter: Balázs Donát Bessenyei
• Created: 15/Sep/16 14:51
• Updated: 06/Jan/17 19:47
• Resolved: 06/Jan/17 18:48

Description

Flume does not currently support environment variable interpolation in the properties file configuration.

Enabling it would help with

• removing security credentials from config files
• help with copy-pastes in configuration files with multiple agents defined

It is arguably a best practice to store (some) config in the environment variables: https://12factor.net/config

Issue Links

• links to: GitHub Pull Request #97
• links to: https://reviews.apache.org/r/51918/