Add script to build a discourse image

Author: mrjvs

.gitignore

@@ -1 +1 @@
-temp
+.temp

Dockerfile

@@ -1,2 +1,21 @@
-ARG DISCOURSE_VERSION="2.0.20251003-1437"
-FROM discourse/base:${DISCOURSE_VERSION}
+# All of this dockerfile is extracted from `./launcher start-cmd`
+# DISCOURSE_IMAGE needs to be made with `./launcher bootstrap`
+ARG DISCOURSE_IMAGE=local_discourse/default
+FROM ${DISCOURSE_IMAGE}
+
+ENV RAILS_ENV=production
+ENV UNICORN_WORKERS=3
+ENV UNICORN_SIDEKIQS=1
+ENV RUBY_GC_HEAP_GROWTH_MAX_SLOTS=40000
+ENV RUBY_GC_HEAP_INIT_SLOTS=400000
+ENV RUBY_GC_HEAP_OLDOBJECT_LIMIT_FACTOR=1.5
+
+ENV LC_ALL=en_US.UTF-8
+ENV LANGUAGE=en_US.UTF-8
+ENV LANG=en_US.UTF-8
+
+VOLUME /shared
+
+EXPOSE 80
+
+CMD /sbin/boot

README.md

@@ -1,11 +1,40 @@
 # discourse-docker
 Pretendo instance of discourse-docker, to make it a little more friendly to deploy as a container
 
-Todo: figure out how to run this. No idea whats going on
-
-Maybe we should just use the launcher completely:
-- Make a web-only config file: `web-only.yml`
-- `launcher bootstrap web-only --skip-prereqs` -> build an image
-- `launcher start-cmd web-only --skip-prereqs` -> get start cmd
-- extract image name from start-cmd
-- `docker push IMAGE_NAME`
+It includes all the plugins that Pretendo runs.
+
+## How to build an image
+Simply run `build.sh`, then build a container with `docker build -t hello-world .`
+
+You need the following to properly host discourse:
+- Postgresql
+- Redis
+- A transactional SMTP server
+
+The environment variables you'll need at runtime (inspired by samples/web_only.yml):
+```sh
+# General env
+DISCOURSE_HOSTNAME=forum.example.com
+
+# Email
+DISCOURSE_SMTP_ADDRESS=
+DISCOURSE_SMTP_PORT=
+DISCOURSE_SMTP_USER_NAME=
+DISCOURSE_SMTP_PASSWORD=
+DISCOURSE_SMTP_ENABLE_START_TLS=
+DISCOURSE_SMTP_DOMAIN=
+DISCOURSE_NOTIFICATION_EMAIL=
+
+# Postgres
+DISCOURSE_DB_SOCKET=
+DISCOURSE_DB_USERNAME=
+DISCOURSE_DB_PASSWORD=
+DISCOURSE_DB_HOST=
+
+# Redis
+DISCOURSE_REDIS_HOST=
+```
+
+More details about hosting it:
+- You need to mount `/shared` at a persistent location
+- Port `80` is exposed in the container

assets/default.container.yml

@@ -0,0 +1,12 @@
+# Basics for web_only
+templates:
+  - "templates/web.template.yml"
+  - "templates/web.ratelimited.template.yml"
+
+# Plugins
+hooks:
+  after_code:
+    - exec:
+        cd: $home/plugins
+        cmd:
+          - git clone https://github.com/discourse/docker_manager.git

build.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Download deps
+rm -rf .temp
+mkdir .temp
+git clone https://github.com/discourse/discourse_docker .temp/repo
+
+# Configure launcher
+cp assets/default.container.yml .temp/repo/containers/default.yml
+
+# Patch default templates to disable database migration on compile
+sed -i 's/echo $pups_command/pups_command="$pups_command --skip-tags migrate,precompile"; echo $pups_command/g' .temp/repo/launcher
+
+# Bootstrap container
+cd .temp/repo
+./launcher bootstrap default --skip-prereqs
+echo "Built container 'local_discourse/default'"