[NIFI-6013] NiFi Docker Environment Variable for enabling debug logging of NiFi inside a Docker container

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Docker
• Assignee: Unassigned
• Reporter: Erik Anderson
• Created: 08/Feb/19 22:14
• Updated: 22/Feb/19 10:46

Description

I have a slight improvement to Environment variables that the NiFI docker system uses to bootstrap its nifi.properties files

There are times, when learning NiFi, that I want to stop and start NiFi with debugging on. If NiFi was running inside a Docker container it was hard.

What I did was I created a new environment variable within the NiFi bootstrapping system it uses to start itself up inside a docker container. I have documented all NiFI environment variables here.

https://github.com/dprophet/nifi/blob/master/nifi-docker/dockerhub/CONFIGURATION.md

I just pushed some code for review
https://github.com/dprophet/nifi/commit/ea31ac6bd8f00944166e3e230af2040636c0505c

What I did was introduce a new environment variable

NIFI_DEBUG

And in file
https://github.com/apache/nifi/blob/master/nifi-docker/dockerhub/sh/start.sh

I added

if [[ -n $NIFI_DEBUG ]] ; then
. "${scripts_dir}/update_logback.sh"
fi

Basically what it does, if the NIFI_DEBUG is set
Example:

NIFI_DEBUG="org.apache.nifi.web.security=TRACE,org.apache.nifi.authorization=DEBUG,org.apache.nifi.web.api.config=TRACE"

It updates the
${NIFI_HOME}/conf/logback.xml

File to enable the debugging modes of NiFi

This is a very fast mechanism to restart NiFi with debugging turned on. Very developer and workflow friendly.

If of interest I will give a pull request.

What about the documentation I created?