Installation

First, create an openshift application:

rhc app create discourse ruby-2.0 -s
cd discourse
rhc cartridge add postgresql-9.2 -a discourse
rhc cartridge add http://cartreflect-claytondev.rhcloud.com/reflect?github=smarterclayton/openshift-redis-cart -a discourse

I suggest you to disable openshift's auto-deploy, so you can have a greater control of the deployment process. rhc app-configure --no-auto-deploy Then, add the quickstart

git remote add upstream https://github.com/koko-ng/discourse-openshift-quickstart.git
git pull -s recursive -X theirs upstream master

Modify the configuration in .openshift/action_hooks/prepare, especially the smtp config, the developer emails and the redis pass later. When everything is ready add, commit and push to openshift

git add .openshift/action_hooks/prepare
git commit -m "config"
git push

If you disabled auto-deploy login into your app rhc ssh and deploy gear deploy. To start the app run

gear stop
app-deployments/current/repo/.openshift/action_hooks/stop
gear start

On small gears (the free ones) the compilation of assets usually fails, but don't worry just login into the app and run ${OPENSHIFT_REPO_DIR}script/assets_tool_openshift.sh precompile "${OPENSHIFT_DATA_DIR}discourse_data/" until it succeeds. Then, just re-run gear deploy.