[NIFI-4878] Update Docker docs to include all environment variables used on startup

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Docker, Documentation & Website
• Assignee: Unassigned
• Reporter: Aldrin Piri
• Created: 14/Feb/18 15:07
• Updated: 31/Aug/18 18:02

Description

NIFI-4824 provided updates to allow specification of the various ports in the container on startup via varying environment variables to aid the issue of the host whitelisting.

It does not appear this information is readily available in our docs and has caused some confusion by users when trying to connect to an instance. We need to update the docs to enumerate these scenarios as well as the environment variables that are anticipated.

We could additionally enhance the experience via performing some logical checks. One example could be verifying that if a custom port is set and we are running secure, there is also an environment variable provided. Additionally, providing variables that would be unused, such as NIFI_WEB_HTTP_PORT when we are running secure could also cause an error/warning.

Issue Links

• is related to: NIFI-4879 Provide error handling and argument verification of environment variables in Docker instances
• is related to: NIFI-4824 Dockerhub Image - allow user to specific host ports on startup