Hey guys, I just wanted to bounce some ideas around for HA… I have prod server running discourse under nginx, which I need to install some plugins on. For various reasons, I can’t afford any downtime. There is also a test server running the same setup. My plan is: Enable readonly mode in prod. B…

Cancel the above :slight_smile: Looks like Docker is the thing I’m after.

You can minimize downtime rebuilding with a two container setup.

Just looking into this now. I’m guessing I just create a second dir called /var/discourseB or something, then build a single container in that? Is there a way to duplicate a container? Will nginx run in both containers?

You create separate data and web containers. You can search here and look in the samples directory in /var/discourse

It looks like there’s a huge gap in the documentation between installing Discourse following this guide: discourse/docs/INSTALL-cloud.md at main · discourse/discourse · GitHub and running separate containers using this guide: How to run separate web and data containers? - #2 by jamesmarkcook How d…

Looks like you copy a sample into the containers folder, the run ./launcher rebuild <new container> You can also copy an existing container for example cp containers/app.yml containers/app2.yml then rebuild this new app2 container with ./launch rebuild app2

The only thing I need to figure out now is how to make the outer nginx point to the right container, as the inner nginx is sitting in the shared container.

See Move from standalone container to separate web and data containers With your solution you could just put each instance on a different port and configure Nginx to use whichever one is available.

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Rob_Spencer (Rob Spencer) October 3, 2017, 12:49pm 2

Cancel the above

Looks like Docker is the thing I’m after.

Topic		Replies	Views
How to install a plugin without rebuilding (or set a maintainance message) Support	10	3625	July 22, 2020
Move from standalone container to separate web and data containers Sysadmins docker , how-to , advanced-setup , two-container	138	30594	September 21, 2026
Discourse High Availability Self-hosting	5	5084	December 19, 2024
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