Will ./launcher destroy app && ./launcher start app remove the built Docker image?

[corot2a]

Hi,

I need to change my SMTP settings in Discourse.

Normally, I know that running ./launcher rebuild app is the standard way to apply configuration changes.

However, due to network restrictions and version limitations, there is a high chance that a rebuild will fail in my environment. Therefore, I am considering using:

./launcher destroy app && ./launcher start app

My question is:

If I run the above commands, will it remove the already built Docker image and require a full rebuild?

Or will it just remove and recreate the container while keeping the existing image intact?

Thanks in advance for your help!

[NateDhaliwal]

Hi there, does this help?

@Discourse

Well, you don’t always need to rebuild

Doing a rebuild will often fix things that seem broken, but it takes a while. There are times when a full rebuild is not necessary; the above is usually the best advice, but If you change just SMTP settings, you can do just this to apply them without doing a full rebuild:

cd /var/discourse
./launcher destroy app
./launcher start app

[featheredtoast (Jeff Wong)]

@corot2a

Or will it just remove and recreate the container while keeping the existing image intact?

To answer directly, yes, it’s this one - your built image is unaffected. The command is equivalent to a docker stop && docker rm, and it does not affect docker images at all.