Add --overwrite option to setup.sh

[justinclift]

Up until now the setup.sh script automatically deletes any existing environment file in /opt/redash/env, which has caught out numerous people and is a source of issues.

From now onwards, an existing environment file will be kept, with only missing mandatory fields added to it to help ensure a working configuration.

This commit also introduces a new (optional) --overwrite parameter to setup.sh, which tells it to completely overwrite any existing environment file and its matching database.

# sh setup.sh     <-- standard installation procedure for Redash

# sh setup.sh --overwrite   <-- deletes and recreates the existing env file and database

DO NOT use the new --overwrite option if you want to keep your existing database, as it WILL cause your database to be replaced with an empty new one.

[justinclift]

@getredash/maintainers @nexovec I'll probably merge this tomorrow if I don't hear from anyone. 😄

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Btw, please don't anyone merge this just yet. It's working in my initial testing on Debian 12.5, but I haven't tested the other distro's yet. Will do that over the next few hours, and may need to make some updates depending on what turns up. 😄 All tested and working fine. 😄

[justinclift]

Hmmm, might be a decent idea to run docker compose down (with appropriate path to the redash compose file) to automatically shut down any running Redash instance when --overwrite is passed.

Will have a look at that later on today. 😄 Added.

[justinclift]

Tested on:

• Alma Linux 8.x & 9.x
• CentOS Stream 9.x
• Debian 12.x
• Oracle Linux 9.x
• Red Hat Enterprise Linux 8.x & 9.x
• Rocky Linux 8.x & 9.x
• Ubuntu LTS 20.04 & 22.04

[justinclift]

Ahhhh, the README file needs to mention the --overwrite option too.

[justinclift]

Going to merge this now. I've finished (manually) testing the updated script on all of the supported Linux distributions, and updated the README to include the new option.