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. Backup and restore to test, (restore from tombstone for the images) Update nginx on the prod box to repoint to test. Install plugins and rebuild Update nginx to point back to prod Disable readonly mode in prod Shutdown test app How does that sound? What am I missing? Happy to turn this into a How To… if there’s value in that :slight_smile: Cheers Rob

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

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 do I get one of the samples installed into a container?

Looks like you copy a sample into the containers folder, the run ./launcher rebuild 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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pfaffman (Jay Pfaffman) 3 באוקטובר,‏ 2017,‏ 1:12pm 3

You can minimize downtime rebuilding with a two container setup.

נושא		תגובות	צפיות
How to install a plugin without rebuilding (or set a maintainance message) Product Support	10	3672	22 ביולי,‏ 2020
Move from standalone container to separate web and data containers Sysadmins docker , how-to , advanced-setup , two-container	138	31821	21 בספטמבר,‏ 2026
Discourse High Availability Self-hosting	5	5121	19 בדצמבר,‏ 2024
Sharing shared volumes Product Support	10	1180	22 במאי,‏ 2018
Discourse HA setup in network isolated env Self-hosting	18	1423	17 במרץ,‏ 2022

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